Government-Backed Green Loans

What to know first

Here are the most important points to understand before you compare a government-backed green home loan.

Could this loan route fit your plans?

It may be worth exploring where an eligible measure suits your property and the repayments fit your budget without relying on predicted energy savings. Only a property-specific assessment can establish the right design, likely performance and permissions. A lender must separately decide whether the finance is affordable and whether you meet its current criteria.

Introduction

A green home loan is borrowing intended for an energy or low-carbon home improvement. The label is broad: it can describe an ordinary lender product, installer-arranged finance or a product supported by a public scheme. The agreement itself is still credit, so the amount borrowed normally has to be repaid under the lender’s terms.

This guide focuses on the Warm Homes Loan Scheme (WHLS), the UK Government’s lender-led scheme for eligible low-carbon measures. The rules were updated in August 2026. They set a common framework, but participating lenders decide which measures and borrower groups they support, how their products work and whether an individual application is approved.

How does it differ from an ordinary loan?

An ordinary personal loan is priced and offered under the lender’s normal commercial terms. A WHLS-supported product must also meet scheme rules on borrowers, properties, eligible measures, finance limits, installer certification and post-installation verification. Government funding is paid to participating lenders after eligible work is verified, with the aim of supporting a lower borrower rate.

That extra framework can make the product cheaper than an otherwise comparable loan, but it does not remove the normal credit checks or turn the loan into a grant. Lenders remain responsible for product design, customer communications, underwriting, servicing and complaints about the finance.

What are the main routes?

What does “government-backed” not mean?

Under the current WHLS rules, government does not underwrite individual loans or take part in a lender’s credit decision. It does not promise to repay the debt if you cannot, guarantee that a measure will perform as expected, or compensate you if energy savings are lower than a sales estimate.

• Approval is not automatic.

• A low or zero rate is not guaranteed.

• The loan is not free money.

• Repayments continue even if savings disappoint.

• Government branding does not replace your own checks.

Why was the scheme created?

Many home upgrades have a high upfront cost. The Warm Homes Plan uses grants for some households and measures, alongside finance intended for people who can repay but need to spread the cost. WHLS is designed to support private lending for listed technologies while keeping ordinary consumer-credit protections and lender responsibility in place.

The finance decision and the home-improvement decision should still be tested separately. A technically suitable installation can be unaffordable, while affordable credit can be a poor choice if the work has not been designed, priced and evidenced properly.

Who is this guide for?

This guide is for UK owner-occupiers and private landlords considering finance for solar PV, batteries, heat pumps, a heat-network connection or another measure listed in the WHLS rules. It is also useful if you are comparing a WHLS product with a grant, ordinary borrowing or paying from savings. Tenants can use the guide to understand the issues, although the current scheme’s eligible borrowers are property owners applying on a personal lending basis.

What this guide covers

• The current launch timetable and the April 2027 checkpoint.

• Which measures and associated works may be financed.

• Who the scheme is designed for and what lenders still check.

• How government support can affect a lender’s rate.

• Scheme caps, repayments and total borrowing cost.

• How WHLS compares with grants across the UK.

• Quotes, surveys, installer standards and certificates.

• The lender-led application and installation process.

• Contracts, payments, complaints and consumer rights.

• Repayment difficulty, scams and practical next steps.

The guide provides general information. It cannot decide whether a particular loan is affordable for you or specify a system for your property. Check current official scheme and lender information, and use appropriately qualified property and financial support where needed.

What changed in April 2027

April 2027 is a useful date to check, but it is not the confirmed national launch date for every government-backed green loan. As at September 2026, the WHLS rules describe an initial consumer launch phase from September 2026, followed by another lender application window expected later in 2026 for onboarding in early 2027. Each approved lender then needs time to launch its own product.

The loan timetable is already under way

The first lender application window opened in June 2026 and has closed. Government expected a further lender window later in 2026. This means the market can develop in stages: one product may be available while another lender is still onboarding, building its customer journey or deciding which eligible measures it will support.

Availability therefore needs to be checked at the time you want to apply. A policy timetable is not the same as a lender accepting applications, and a lender taking part in WHLS does not have to offer every permitted technology or lend to every eligible borrower group.

VAT is scheduled to change in April 2027

Under current HMRC guidance, qualifying installations of specified energy-saving materials are zero-rated for VAT until 31 March 2027. From 1 April 2027, those supplies are scheduled to revert to the reduced rate of 5%. The precise VAT treatment depends on what is supplied and installed; related building work does not automatically receive the same treatment.

For work priced or installed around the changeover, ask the supplier to show the VAT assumption clearly. A quote prepared months earlier may need updating if the tax point, scope or current law changes.

• Ask whether the price is VAT-inclusive.

• Separate the eligible measure from unrelated building work.

• Check whether the quote assumes completion before 1 April 2027.

• Confirm the live HMRC position before signing or paying.

What else could change by then?

Participating lenders, product terms, interest rates, scheme funding and the list of eligible measures can change. The WHLS rules allow the Department to amend the scheme with notice and say the central funding pot is finite. Lenders can also change or withdraw products under their own terms.

Air-to-air heat pumps illustrate why live checks matter. They became a separate Boiler Upgrade Scheme grant category in England and Wales in July 2026, but the August 2026 WHLS rules still say they cannot currently be financed through WHLS because the required MCS standards and certification are not yet available for that route.

How should I use the April 2027 date?

1. Check whether a participating lender is accepting applications for your measure.

2. Read the current scheme rules rather than assuming an announced change is live.

3. Ask for a fresh itemised quote showing the correct VAT treatment.

4. Recheck grant amounts and whether combining support is permitted.

5. Confirm the installer, product and evidence requirements before work starts.

There is no need to treat April 2027 as a deadline to borrow. It is a checkpoint for tax, lender availability and scheme rules. Your decision should still depend on a suitable property design, a complete price, affordable repayments and a contract you understand.

What you can use a green loan for

The current WHLS rules fund a defined list of low-carbon technologies. They do not cover every improvement that could make a home warmer or more efficient. A lender may offer separate ordinary finance for excluded work, but it should be clear which part of your borrowing receives WHLS support.

Which measures are listed now?

What associated work may be included?

Necessary installation, labour and ancillary capital costs can be included where they enable the eligible measure and stay within the same cap. The allowed scope depends on the technology and the lender’s evidence checks.

For heat pumps

• Necessary radiator improvements.

• Relevant pipework changes.

• A suitable hot-water tank where required.

• Other work directly needed for the eligible installation.

Insulation is not an eligible WHLS ancillary cost for a heat-pump installation. It may still be important to the property’s performance, but it needs a separate funding route unless the rules change.

For solar PV and batteries

• Scaffolding and temporary installation-safety equipment.

• Grid-connection work required for the installation.

• Battery integration, monitoring and control equipment.

• Isolators, breakers and relevant protection devices.

• An eligible EV chargepoint when installed with solar or a battery.

A chargepoint is not a standalone WHLS measure. The installer and chargepoint must meet the applicable Office for Zero Emission Vehicles requirements, and the same chargepoint cost cannot also be publicly funded elsewhere. Roof replacement and structural repair needed before solar installation are not covered by WHLS.

What is not covered at launch?

• Loft, wall or floor insulation as a WHLS measure.

• Windows, doors or general draught-proofing.

• Roof replacement or unrelated structural repairs.

• Kitchens, extensions or other general renovations.

• A standalone EV chargepoint.

• Work that is not necessary for an eligible measure.

A lender may offer another loan alongside a WHLS-supported product. Ask for separate amounts, rates, repayments and total costs. Otherwise, a “green” package can make it difficult to see which work is supported by the scheme and which is ordinary borrowing.

Why a whole-home plan still matters

The finance list should not drive the technical design. A heat pump may need fabric improvements or larger radiators. Solar output depends on the roof, orientation and shading. A battery needs suitable electrical design, safe siting and a plan for how it will be used. Those checks can identify work that should happen first, even where it must be funded separately.

1. Understand the home’s heat loss, electricity use and practical constraints.

2. Choose the measure and system size on property evidence.

3. Identify enabling work, permissions and separate repairs.

4. Check grants and permitted combinations.

5. Compare the complete project cost with the finance offer.

What should be assessed for each measure?

Practical takeaway

Start with a written scope that separates the eligible technology, permitted ancillary work and anything that needs separate funding. Ask the installer and lender to confirm the same version before you apply. That makes the cap, grant deduction, quote and final verification easier to follow.

Who can apply

WHLS has scheme-level rules for borrowers and properties, but a lender makes the individual credit decision. Meeting the scheme definition means you can be considered; it does not mean that every lender must offer you a product or approve the amount you want.

Which borrower groups are included?

Owner-occupiers

An owner who lives in an existing domestic property can apply on a personal lending basis. Where a property has more than one owner, the lender decides who must apply, consent or be named on any secured agreement.

Private rented sector landlords

A private landlord can apply on a personal lending basis for an eligible domestic property. The lender may choose whether to serve landlords and may set its own evidence requirements. A company or special-purpose vehicle seeking business lending is not one of the borrower groups listed for the current scheme.

What about tenants and companies?

Tenants are not listed as WHLS borrowers because the eligible measure is installed in a property owned by someone else. A tenant can discuss improvements with the landlord and check support that may be delivered through a landlord or local scheme. Companies and other business borrowers may be able to use commercial finance, but that is outside this personal-lending scheme.

Are there income or EPC rules?

The Department does not set a WHLS income threshold, mandatory minimum energy-efficiency improvement or scheme-wide restriction by property type. A lender can still apply additional product criteria, such as an income requirement, an EPC request or a maximum loan-to-value for secured borrowing.

Every lender remains responsible for checking creditworthiness and affordability under the rules that apply to its product. Irregular income, existing commitments or a lower credit score do not create an automatic scheme exclusion, but they can affect a lender’s decision, rate or maximum amount.

Which properties can be considered?

The rules cover existing domestic properties across the United Kingdom. They do not set a scheme-level property-type ban. A mixed-use building may qualify where the installation is principally intended to meet the household’s domestic energy needs. Incidental home working, a related annexe or a short-term let does not automatically make the property ineligible.

Owners of more than one property may apply for each property, subject to lender criteria. The lender still needs evidence of the installation address, ownership or landlord status, the eligible measure, the installer and the amount within the technology cap.

Flats, leasehold and restricted homes

A flat or leasehold home can require freeholder, factor, managing-agent or other consent. Shared roofs, external walls, communal systems and building insurance can affect what is practical. Listed buildings and conservation areas can also need additional planning or heritage checks. Loan approval does not override these permissions.

Does the same process apply in every UK nation?

WHLS is UK-wide, but grants, planning systems, building standards, consumer-support routes and public retrofit programmes differ between England, Wales, Scotland and Northern Ireland. Check the nation-specific route for any grant or approval you intend to combine with the loan.

Practical takeaway

Before approaching a lender, confirm that you are applying as an eligible property owner, the work is for a domestic property, the measure is currently listed and the permissions route is understood. Then treat the lender’s affordability and credit assessment as a separate decision.

How government backing affects rates

The government support sits behind the lender’s product. It is designed to reduce the cost of providing an eligible loan, while the lender keeps responsibility for the product, the credit risk and the final rate offered to the borrower.

Where does the government support go?

After an eligible installation has been completed and verified, government can pay the participating lender a non-repayable capital grant. Under the August 2026 rules, the grant can be up to 20% of the eligible loan amount. It reduces the lender’s effective principal exposure; it is not a cash grant handed to the borrower.

The lender originates and services the full loan at the contractual rate shown in the agreement. The borrower should judge that agreement by the rate, APR, repayments, fees and total repayable, rather than trying to calculate the separate grant received by the lender.

How much can the rate be reduced?

For eligible loans with a term of at least three years, the mechanism is intended to support a reduction of up to five percentage points from the lender’s relevant starting nominal fixed rate. The actual reduction may be lower where the grant cap is reached. It cannot produce a negative borrower rate.

The five-percentage-point figure refers to the scheme’s nominal-rate mechanism, not automatically to the APR. APR is the standard measure that also reflects relevant fees and compounding, so it is the more useful starting point for comparing credit offers.

What should I compare in an offer?

What does the lender still control?

• Which eligible technologies its product supports.

• Whether it serves owner-occupiers, landlords or both.

• Its starting rate, contractual rate and APR.

• The loan amount, term and repayment structure.

• Creditworthiness and affordability decisions.

• Whether funds go to you or directly to the installer.

• When deposits, balances and repayments are paid.

This is why two WHLS products can differ. Government support creates a framework; it does not create one standard loan with one rate or one approval policy.

What does government backing not protect me from?

• Being declined under a lender’s criteria.

• Paying interest or fees shown in the agreement.

• A change in your income or other commitments.

• Energy savings being lower than forecast.

• A dispute about workmanship or system design.

• The consequences of missed secured repayments.

Could another lender offer a different result?

Possibly. Lenders may have different target customers, supported measures, maximum terms and risk policies. A decline by one lender does not prove that every lender would decline, but repeated applications can affect your credit record. Check whether a quotation or eligibility check uses a soft or hard credit search before proceeding.

Do not assume that the lowest headline rate is the lowest-cost or safest option. A secured loan can have a lower rate but put your home at risk if you cannot repay. A longer term can reduce the monthly amount but increase the total interest paid.

Practical takeaway

Ask the lender to show the full cost in pounds, the APR, the repayment schedule, all fees, the security and what happens on early repayment. Compare like with like, and make the decision without counting on a particular level of energy savings.

How much you can borrow

The WHLS technology caps set the maximum loan amount that can receive scheme support for a measure. They are not an entitlement. The amount available to you can be lower because of the lender’s product limit, the verified project cost, grants already deducted and the lender’s affordability decision.

There are three different limits

1. The scheme cap for the eligible technology and permitted ancillary work.

2. The participating lender’s own minimum and maximum product amount.

3. The amount that lender is prepared to offer after its checks.

For an air-to-water heat pump, for example, the scheme cap is £20,000 before an applicable Boiler Upgrade Scheme grant is deducted. If the itemised eligible cost is lower, the loan cannot be increased simply to reach the cap. If the cost is higher, the excess needs another funding source.

How do grants and discounts affect the amount?

The quote should show the total eligible installation cost and any permitted grant or discount. WHLS can be used with the Boiler Upgrade Scheme and the Home Energy Scotland Scheme under the current duplicate-funding rules. The supported loan should cover only the remaining eligible amount, within the measure cap.

Other public funding for the same measure is generally not permitted alongside WHLS. Retailer or installer discounts are allowed, but they should be transparent and should not replace the scheme-supported rate reduction.

How repayments are calculated

A typical fixed-rate repayment loan spreads capital and interest over an agreed term. The exact calculation, payment date and treatment of fees are lender-specific. Longer terms usually reduce each monthly payment but can increase the total paid. A lender may offer unsecured personal credit, point-of-sale finance or secured borrowing such as additional mortgage lending.

Do not use predicted savings as the repayment plan

A quote may include an estimate of reduced energy use, lower imports or export income. These estimates depend on the property, system design, weather, tariffs, maintenance and how you use energy. They are not guaranteed income. Check that you could still meet the loan payment if the estimate is wrong or energy prices change.

• Compare repayments with your current budget, not only current energy bills.

• Allow for maintenance, insurance and replacement costs where relevant.

• Consider income changes and other borrowing over the full term.

• Keep an emergency margin rather than using every available pound.

What if the loan is secured on my home?

The WHLS rules allow secured lending models as well as unsecured and point-of-sale products. A first- or second-charge loan can affect remortgaging, sale proceeds and the consequences of missed payments. Read the security documents carefully and consider appropriately authorised mortgage or legal advice where the implications are not clear.

What if I expect to move?

Check whether the loan must be repaid when the property is sold, whether an early-repayment charge applies and whether any equipment warranty or export arrangement transfers to the buyer. Do not assume that the debt automatically stays with the property or that a buyer will pay more for the improvement.

Questions to ask before choosing an amount

• What is the eligible project cost after grants and discounts?

• Which part of the work receives WHLS support?

• Is any extra work financed at a different rate?

• What is the APR and total repayable?

• Could I make overpayments, and would charges apply?

• What happens if installation costs rise?

• What happens if I sell or remortgage?

Practical takeaway

Borrowing up to a scheme cap is not the goal. The useful amount is the smallest affordable sum that completes a properly specified eligible installation after available grants and your own contribution have been considered.

How green loans compare with grants

A grant reduces an eligible cost without creating a debt, while a loan spreads a cost that you must repay. Check grant routes first. They can be more valuable than a reduced loan rate, but they often have narrower household, property, technology, location or funding rules.

Which public routes should I check?

Can WHLS be combined with a grant?

The current WHLS rules specifically allow the same heat-pump project to combine with the Boiler Upgrade Scheme or the Home Energy Scotland Scheme, with the loan covering eligible cost left after the grant. Other public grant or loan funding for the same measure is generally not permitted.

This restriction is about duplicate public funding for the same measure. You may still receive a retailer or installer discount, and you may use your own money. Ask the lender to confirm the treatment of any other support before you apply, because an incorrect declaration can affect scheme eligibility.

How does the Boiler Upgrade Scheme fit?

BUS is an installer-led scheme in England and Wales. Current grant values depend on the technology and, for some categories, the heating system being replaced. An MCS-certified installer applies for and redeems the voucher on the property owner’s behalf. A quote or application is not a guarantee that Ofgem will issue or pay a voucher.

Where BUS applies, the WHLS scheme cap for the heat pump is measured before the grant is deducted, but the supported loan should cover the remaining eligible installation cost. Ask for a quote that shows the gross price, grant amount, your contribution and proposed borrowing separately.

Why national differences matter

England, Wales, Scotland and Northern Ireland have different public programmes, eligibility tests and application sequences. Some require an assessment or written funding offer before work starts. Starting work, paying a deposit or signing an unconditional contract too early can jeopardise support. Follow the current rules for the nation and scheme involved.

What about VAT?

VAT relief is separate from both a grant and a loan. Under current HMRC rules, qualifying installations are zero-rated until 31 March 2027 and scheduled to move to 5% from 1 April 2027. Ask the supplier to identify the rate applied to the eligible installation and to any separate building work.

What other finance might be compared?

Other routes include savings, an ordinary personal loan, installer finance and additional mortgage borrowing. Each has different costs and risks. Installer finance may be convenient but should be compared independently. Mortgage borrowing may have a lower rate but can run for longer and is secured on your home.

A sensible decision sequence

1. Choose the measure from a property-specific assessment, not a finance advert.

2. Check grants and local support before signing an installation contract.

3. Deduct permitted support and any contribution you can safely make.

4. Compare WHLS products with other regulated finance on total cost and risk.

5. Proceed only when the work and repayments are both clear.

Practical takeaway

A reduced-rate loan can be useful, but a grant usually has first claim on your attention because it does not need to be repaid. Confirm the order of applications and permitted combinations before paying or allowing work to begin.

Evidence and installer standards you may need

WHLS links the finance to evidence that an eligible measure has been designed, quoted and installed through the required route. This protects the integrity of the public support, but it does not mean the lender has designed the system or guaranteed its performance.

Which certification is required?

For current microgeneration measures such as solar PV, battery storage and heat pumps, an MCS-certified product must be installed by an MCS-certified installer to the relevant design and installation standard. The installer needs certification for the specific technology at the point of installation.

Heat-network connections are treated differently under the WHLS installer requirement. Other work around a project may also need a registered electrician, building-control approval, an approved EV-chargepoint installer or another competent professional. One certificate does not replace every legal or technical requirement.

What must a non-embedded quote contain?

For a standard application where the finance is not embedded at the point of sale, the WHLS rules require a valid quote from an MCS-certified installer. It should:

• Be dated within the previous six months.

• Be addressed to the applicant.

• Be issued on company headed paper.

• Show the installer’s MCS number.

• Give the full installation address.

• Itemise all improvement and ancillary costs.

• State the system size, such as its kW capacity.

Even where a lender uses a different embedded-finance journey, ask for the same practical clarity: named products, system size, design basis, exclusions, warranties, price, payment schedule and the person responsible for each permission.

What should a property assessment cover?

Heat pumps

• Room-by-room heat loss and design temperature.

• Radiator or underfloor-heating output.

• Proposed flow temperature and controls.

• Hot-water demand and cylinder space.

• Outdoor-unit or ground-loop location.

• Electrical supply and any network work.

Solar PV and batteries

• Roof condition, structure, orientation and shading.

• System size, inverter and expected generation method.

• Electrical capacity, cable routes and isolation.

• Battery chemistry, location, ventilation and fire safety.

• Export, metering and DNO notification or approval.

Other measures

A heat-network connection needs a clear connection offer, ongoing charges and responsibility for internal alterations. Micro-wind and hydro projects can involve planning, environmental, land or water permissions and a detailed resource assessment. These are specialist projects; the loan cap is not evidence that a site is suitable.

What should be agreed before work?

• A detailed scope and named equipment.

• Design assumptions and estimated performance method.

• The itemised price and VAT treatment.

• Who obtains planning, building and network approvals.

• A payment schedule linked to clear stages.

• Timescales, access, making good and waste removal.

• Warranties, insurance-backed protection and exclusions.

• How variations and complaints will be handled.

What evidence should I receive after installation?

• The MCS certificate where the measure requires it.

• Commissioning and test records.

• Product, workmanship and other warranties.

• Electrical and building-control documents where applicable.

• DNO, export or metering records where relevant.

• Operating instructions and control settings.

• Final invoice, payment record and any grant evidence.

• A record of agreed changes from the original quote.

The installer is required to lodge completed eligible work in the MCS Installation Database so an MCS certificate can be generated. The lender uses installation evidence to verify the scheme claim. Keep your own copy rather than assuming it will always be recoverable from another party.

What if my home is non-standard?

Listed buildings, conservation areas, flats, shared roofs, unusual construction, ageing electrics and properties needing structural repair can require extra assessment. A competent installer should identify limits rather than force the project into a standard package. You may need separate advice from building control, a planning authority, a structural professional, a freeholder or the network operator.

Practical takeaway

Do not apply from a headline price. Build an evidence pack first: property assessment, itemised quote, permissions route, installer certification, product details, grant position and a clear contract. The same pack will help the lender, protect the installation and make any later complaint easier to explain.

Step-by-step application process

The WHLS consumer journey is lender-led. Exact screens and checks differ by product, but the same decisions normally need to happen: choose a suitable measure, check support, obtain the right evidence, apply to a participating lender, complete the work and verify it.

Step 1: define the improvement

Start with the problem you are trying to solve and the property evidence. Do not begin with the maximum amount offered. Decide whether the proposed technology is suitable, what ancillary work is necessary and which repairs or efficiency work need a separate budget.

Step 2: check grants before borrowing

Check the current official route for your nation and technology. Where BUS or the Home Energy Scotland Scheme can be combined with WHLS, establish the expected grant process and show it separately in the project budget. Do not assume another public grant can be stacked with the same measure.

Step 3: obtain assessments and quotes

Use an appropriately qualified installer or assessor for the measure. For a non-embedded WHLS application, obtain a quote that meets the scheme requirements. Compare more than price: check system design, product model, exclusions, permissions, warranties and the evidence delivered at handover.

Step 4: find a live participating lender

Use the official GOV.UK scheme page or home-energy service when consumer lender links are published. Confirm that the exact product is described as supported by WHLS and that the lender is authorised with the relevant permission. A familiar bank name does not prove that every one of its products is in the scheme.

Step 5: prepare the application evidence

• Identity, address and lender-requested income evidence.

• Proof that you are an owner-occupier or private landlord.

• The full installation address.

• The eligible measure and itemised valid quote.

• Installer and product certification details.

• Grant information and duplicate-funding declaration.

• Any EPC or other evidence required by the lender.

Step 6: review the finance information

Before signing, read the pre-contract information and the proposed agreement. Check the APR, total repayable, term, monthly amount, security, fees, early-repayment terms, payment timing and what happens if the installation is delayed, changed or cancelled.

• Ask whether any quotation uses a hard credit search.

• Confirm whether finance covers only the eligible work.

• Check who receives the loan funds and when.

• Understand any cancellation or cooling-off rights.

• Keep copies of every version you accept.

Step 7: lender checks and decision

The lender checks creditworthiness and affordability, and verifies scheme points such as the borrower group, domestic property, eligible measure, quote, installer status and amount within the cap. It may ask for more evidence or offer less than requested. Approval is the lender’s decision, not the installer’s or Clearwise’s.

Step 8: contract, install and certify

Once the required finance and grant conditions are clear, enter the installation contract and arrange the work. The installer completes and commissions the system, then lodges the eligible installation in the MCS Installation Database where required. That produces the MCS certificate used for scheme verification.

Step 9: payment and repayments

The lender decides whether funds are paid upfront, as a deposit, directly to the installer, after verification or through another agreed sequence. Government pays its grant to the lender only after eligible work is verified. Ask when your repayment obligation starts and what happens if the work is incomplete or disputed.

Practical takeaway

Keep the decisions in the right order: suitable measure, current grant rules, complete quote, regulated finance, written contract, verified installation and then ongoing repayment. A salesperson should not collapse all of those into one rushed signature.

Getting the work done

A well-chosen loan does not fix a weak installation contract. The work should be managed as a home-improvement project with a clear design, named responsibilities, controlled payments and evidence at each stage.

What should I check before signing?

• The installer’s current certification for the exact measure.

• The named product, system size and design basis.

• An itemised price, VAT treatment and exclusions.

• Who obtains planning, building and network permissions.

• Start and completion expectations, including dependencies.

• How the home will be protected and made good.

• Warranty, insurance and complaint arrangements.

• The agreed process for changes and cancellation.

Read the installation contract separately from the credit agreement. They may refer to each other, but they create different responsibilities. Check which business is selling the work, which business is lending and whether an intermediary or installer is arranging the finance.

How will the money be paid?

The lender can choose to pay you, pay the installer, release a deposit, wait for verification or use another sequence. Do not assume that government or MCS holds the money in escrow. Ask for the payment path in writing before you sign either agreement.

Where a deposit is required, check the amount, recipient, protection, refund terms and the milestone it secures. Avoid paying outside the agreed route or to a different personal account because someone says the scheme requires an urgent transfer.

Should payments be linked to stages?

Staged payments can help keep money aligned with progress, but the available structure depends on the lender and contract. Useful stages might include design approval, equipment delivery, physical installation, commissioning and final evidence. The stage should describe objective proof, not only a date.

• Confirm what evidence releases each payment.

• Keep enough leverage for snagging and handover.

• Do not sign a completion statement before checking the work.

• Tell the lender promptly if installation is paused or disputed.

How should changes be controlled?

Home projects often uncover extra work. Ask for every variation in writing before it is carried out. The variation should explain the reason, price, effect on system design, delay, VAT, warranties and whether it remains eligible under the scheme and within the cap.

A change that seems small can affect grant or finance evidence. For example, switching product, installer, system size or installation address can break the match between the lender’s approval and the MCS record. Check with the lender before agreeing changes that affect the financed measure.

What should happen on site?

• Agree access, working hours and protection of the home.

• Keep photographs of important stages where safe.

• Record delays, damage, missing items and agreed changes.

• Do not interfere with electrical, refrigerant or structural work.

• Raise concerns with the named project contact promptly.

• Keep conversations factual and confirm decisions in writing.

Electrical alterations, refrigerant work, roof work and other specialist tasks can be dangerous and regulated. Use the competent people required for the job. The guide does not provide DIY instructions for installing or altering these systems.

What should a proper handover include?

• A demonstration of controls and normal operation.

• Commissioning and test results.

• MCS and other completion certificates where applicable.

• Product and workmanship warranty documents.

• Maintenance, servicing and emergency information.

• Final drawings, settings or system data where relevant.

• DNO, export or metering confirmation where relevant.

• The final invoice and an agreed snagging record.

How should I judge early performance?

Compare operation with the commissioned settings and agreed design assumptions, not with a salesperson’s best-case promise. New heating controls can take time to understand, and solar or battery results vary by season. Keep meter readings and system data, but do not alter safety settings or technical parameters without competent advice.

If performance appears wrong, report the evidence promptly. Ask the installer to check the design, settings, equipment and installation before assuming that the technology itself is unsuitable. Continue making loan payments unless the lender agrees another arrangement; an installation dispute does not normally pause the credit agreement automatically.

Practical takeaway

Never let the paperwork fall behind the work. Match each payment to the agreed scope, record variations, check the system before signing completion and keep the full handover pack for the life of the loan and equipment.

Consumer rights

A WHLS project can involve at least two contracts: the installation and the finance. If something goes wrong, identify which business is responsible for the issue and use the appropriate complaint route. Some complaints may need to be raised with more than one party.

What rights apply to the installation?

Where the Consumer Rights Act 2015 applies, a trader providing a service must generally use reasonable care and skill. Information you relied on about the service can form part of the contract. If price or timing was not fixed, the Act can imply a reasonable price or reasonable time.

Possible remedies can include repeat performance or a price reduction, depending on the facts and whether a remedy is possible and proportionate. Other losses and legal rights can be more complex. Keep the quote, contract, adverts, messages, photographs, certificates and a timeline of what happened.

Which complaint route should I use?

How do I make a useful written complaint?

1. State the contract, property, dates and the problem clearly.

2. Explain what was promised and attach the supporting evidence.

3. Describe the practical effect without exaggeration.

4. Say what remedy you want and give a reasonable response date.

5. Keep proof of delivery and a log of replies and calls.

Avoid making technical changes that could destroy evidence or create a safety risk. Where expert inspection is needed, ask for a written report that identifies the observed defect, relevant standard and recommended remedy.

How does the MCS route work?

For an MCS-certified installation, complain to the installer first and follow its formal process. If the matter is not resolved, use the current MCS complaints policy and provide the certificate, contract, evidence and correspondence. MCS deals with matters within its certification remit; it is not the lender or a court.

How do I complain about the finance?

Complain to the financial business first. For most financial complaints, the business normally has up to eight weeks to send a final response. If you remain unhappy, or the time expires, the Financial Ombudsman Service may be able to consider the complaint. A referral usually needs to be made within six months of the final response, subject to its rules and exceptions.

The WHLS rules also recognise that relevant Consumer Credit Act provisions may, depending on the product and relationship, make a lender responsible for some installation-quality or mis-selling issues. Do not assume that this applies automatically. Raise the issue with the lender and seek Citizens Advice or legal advice where the position is unclear.

What if the work is unsafe?

Treat safety separately from the dispute. If there is an immediate risk of fire, electric shock, structural failure, gas or another hazard, keep people away and contact the appropriate emergency service or qualified professional. Do not continue using equipment that a competent person has told you is unsafe.

What if the business stops trading?

Check warranties, insurance-backed guarantees, card or credit protections and any certification-scheme route. Tell the lender promptly if financed work is incomplete. The options depend on how you paid, the credit agreement, the installer’s status and the protection documents actually issued.

Practical takeaway

Separate the issues, write a clear timeline and preserve evidence. Contact the installer for workmanship, the lender for finance and affordability, and the relevant scheme or ombudsman only for matters within its remit. Deadlines can apply, so do not leave a complaint unanswered indefinitely.

Managing repayments

A reduced-rate loan is still a fixed commitment. Your income, household costs or expected savings can change during the term. Planning before you sign and contacting the lender early if difficulties appear usually leaves more options than waiting until arrears grow.

How can I stress-test the repayment?

• Base the decision on income after essential spending.

• Do not count estimated energy savings as guaranteed income.

• Allow for maintenance and unexpected home repairs.

• Consider changes to work, health, caring or tenancy income.

• Check how the payment fits with other debts and remortgaging.

• Keep a realistic emergency buffer where possible.

For landlord borrowing, consider void periods, repairs and restrictions on passing costs to tenants. For secured borrowing, understand that missed payments can put the property at risk. The cheapest rate is not automatically the most suitable risk structure.

What should I do before missing a payment?

1. Contact the lender and explain what has changed.

2. Ask which support options are available for that product.

3. Prepare a simple income, spending and debt summary.

4. Protect priority costs such as housing, energy and food.

5. Use a free debt adviser if several commitments are affected.

6. Get any agreed payment arrangement in writing.

MoneyHelper recommends speaking to a creditor early. Do not stop a direct debit or make a reduced payment without understanding the consequences. If a payment is imminent and unaffordable, ask the lender what it can do and how the account will be reported.

What support might a lender discuss?

The options depend on the agreement, your circumstances and regulatory requirements. They may include a temporary reduced-payment arrangement, a short deferral, a term change or another forbearance measure. Ask whether interest continues, whether the total repayable rises, whether security is affected and how the arrangement may appear on your credit file.

Where can I get free debt help?

MoneyHelper can direct you to free and confidential debt advice across the UK. A debt adviser can help you prioritise bills, understand options and speak to creditors. Avoid firms that charge an upfront fee for a solution before assessing your full position.

Does Breathing Space apply?

The Debt Respite Scheme known as Breathing Space applies in England and Wales. It provides temporary protections for eligible debts while an authorised debt adviser helps with a plan. It is not a payment holiday, does not apply automatically and has detailed rules. Scotland and Northern Ireland have different debt processes and support routes.

Can I overpay or repay early?

Check the agreement. An overpayment can reduce future interest or the term, but a charge, notice requirement or scheme reconciliation may apply. Do not assume the lender will treat an extra payment in the way you expect; ask whether it reduces the monthly amount, the term or the final balance.

What if I plan to sell or remortgage?

Tell the conveyancer or mortgage adviser about secured borrowing and relevant equipment arrangements. Obtain a settlement figure, check early-repayment terms and gather installation certificates and warranties for the buyer. The treatment of an unsecured loan may differ, but it does not disappear because the property is sold.

Practical takeaway

Treat repayment difficulty as a money problem, not a failure of the environmental project. Contact the lender early, protect essential bills and use free debt advice. Do not take expensive new credit to hide an unaffordable payment without independent help.

Avoiding scams

Government branding, new schemes and high-value home technology can attract scams and aggressive selling. A genuine offer should withstand slow, independent checks. Refusing to decide during an unsolicited call, doorstep visit or same-day sales meeting is a sensible protection.

What are common warning signs?

Fake government approval

• You are told that your household has already been approved.

• A fee is demanded to release government money.

• The caller will not name the lender or scheme rule.

• Logos are used without a matching official lender page.

Guaranteed savings or performance

• Energy savings are described as certain.

• A loan payment is said to pay for itself in every home.

• Export income is treated as fixed for the loan term.

• A property survey is dismissed as unnecessary.

Rushed or hidden finance

• You see finance documents only after agreeing the work.

• The lender identity or APR is unclear.

• A salesperson completes answers without checking with you.

• Unrelated work is bundled into one unexplained amount.

Clone firms and false credentials

• Contact details differ from the FCA or MCS record.

• You are asked to move the conversation to a new number.

• A certificate image cannot be checked independently.

• Payment is requested to a personal or unexpected account.

How do I verify the lender?

1. Use the FCA Firm Checker for a new financial product.

2. Check that the firm has permission for the service offered.

3. Match the telephone, website and legal name with the record.

4. Use the official details to contact the firm independently.

5. Confirm that the exact product is supported by WHLS.

An authorised firm can still offer products outside WHLS, and the FCA checker does not guarantee that every protection applies. It is one important check, not a replacement for reading the agreement.

How do I verify the installer and quote?

• Check MCS certification for the exact technology.

• Confirm the installer details independently.

• Ask for the required itemised written quote.

• Check the system size and product model.

• Verify warranties and any consumer-code membership.

• Compare another properly specified quote.

• Do not allow work to start before finance and grant conditions are clear.

Is it safe to pay a deposit?

A deposit is not automatically suspicious, but it needs a clear contract and payment route. Check how much is required, what it reserves, whether it is protected, when it is refundable and whether the lender has approved that payment. Be wary of an urgent bank transfer that bypasses the named business or finance process.

Where should suspected fraud be reported?

Contact your bank or payment provider immediately if money or account details may be at risk. Report fraud through Report Fraud in England, Wales and Northern Ireland; the service provides an online route and telephone support. In Scotland, report fraud to Police Scotland, normally through 101 unless there is an emergency.

You can also report an unauthorised or clone financial firm to the FCA. Preserve messages, advertisements, account details, telephone numbers and payment records. Do not continue engaging simply to collect more evidence if doing so creates risk.

Practical takeaway

Slow the process down. Verify the lender, installer, product, quote and scheme route independently. Never share security codes or move money because a caller says a government offer will expire today.

Conclusion

The Warm Homes Loan Scheme creates a UK-wide framework for participating lenders to offer supported finance for a defined set of low-carbon home measures. It can reduce the cost of credit, but it does not replace lender checks, a property-specific design, a clear installation contract or your responsibility to repay.

The most important points to carry forward

• Check that a lender and exact product are live under WHLS.

• Use the current eligible-measure list, not a generic green label.

• Check grants and permitted combinations before borrowing.

• Separate property suitability from financial affordability.

• Compare APR, total repayable, term, fees and security.

• Use the required installer and keep the full evidence pack.

• Verify permissions, payment stages and complaint routes.

• Recheck VAT and scheme rules around April 2027.

• Contact the lender early if repayments become difficult.

• Pause and verify any unsolicited or high-pressure offer.

What happens next

Start with the official WHLS information and the current support route for your UK nation. Write down the measure you are considering, the property checks still needed, available grants, the complete quote and the maximum repayment that fits your budget without assuming energy savings.

This guide cannot determine whether a product is affordable for you or whether a technology is suitable for your home. Scheme rules, lender products, VAT, grants, prices and technical standards can change. Use an appropriately qualified installer or assessor for the property and an authorised adviser where the financial or secured-borrowing implications need personal advice.

Clearwise may make an introduction only after you choose that route and give consent. Any home-upgrade provider remains independent and decides whether it can assist. An introduction does not guarantee acceptance, funding, a grant, availability, property suitability or an installation outcome.

You can use the FAQs for direct answers, the glossary for unfamiliar terms, the useful organisations for official help and the references to check the underlying sources before deciding what to do.

Frequently Asked Questions

Understanding the loans

Availability and April 2027

Who can apply

Property considerations

What you can use the loan for

Costs, rates and borrowing limits

Combining loans with other support

Evidence and installer standards

If things go wrong

Staying safe from scams

Useful organisations

GOV.UK: Find ways to save energy in your home

This official service gives property-based home-energy recommendations for owners in England and Wales and signposts grants and next steps. It links to Home Energy Scotland and nidirect for the corresponding national routes.

• 0800 098 7950
• www.gov.uk

Citizens Advice

Citizens Advice provides free, practical consumer guidance on faulty work, trader disputes and unfair practices. The linked service applies to England and directs readers to the corresponding services for Wales, Scotland and Northern Ireland.

• 0808 223 1133
• www.citizensadvice.org.uk

TrustMark

TrustMark is the UK Government-Endorsed Quality Scheme for work carried out in and around the home. Registration can be relevant to some retrofit work and public programmes, but it is not a guarantee and does not replace MCS where MCS certification is required.

• 0333 555 1234
• www.trustmark.org.uk

MCS

MCS sets certification requirements for relevant small-scale renewable and low-carbon installations. Its official tools can help you check certification and understand the complaints route for work within the MCS framework.

• 0333 103 8130
• mcscertified.com

References

Still have questions?

If you’re still unsure how government-backed green loans work, whether your home is suitable, or how to combine finance with grants and installer standards, it can help to speak to an expert.

A short conversation can clarify:

• which upgrades are most likely to work well in your property

• the evidence you should insist on before borrowing

• what “good” looks like in quotes, warranties and commissioning

• how to compare finance options without getting overwhelmed

• red flags for scams, mis-selling and poor-quality retrofit

If you’d like personalised guidance, you can speak with an expert directly. The first consultation is free, and you can use it simply to sense-check your plan before you commit.