0% VAT on Energy-Saving Materials

Introduction

If you’ve seen adverts promising “0% VAT” on solar panels, heat pumps or insulation, you’re looking at a specific, time‑limited VAT relief in UK law for certain energy‑saving upgrades. It can reduce the upfront cost of eligible work, but it does not apply to everything that feels “green”, and it relies on how the work is supplied and invoiced.

Understanding 0% VAT in plain English

VAT is a tax added to most goods and services. For many home improvement jobs, VAT is normally charged at the standard rate (20%). A 0% VAT (“zero‑rate”) supply is different: the work is still VAT‑taxable, but the VAT charged to the customer is 0%.

For a household, the practical impact is straightforward:

• If an installer applies the 0% rate correctly, you do not pay VAT on the eligible lines on your invoice.

• The supplier still treats the work as a VATable supply and (if VAT‑registered) can generally reclaim relevant VAT on their business costs in the normal way.

• You do not need to “apply” for 0% VAT as a consumer; it is applied by the supplier when the legal conditions are met.

A quick illustration (figures for explanation only):

• Quote for supply-and-install of eligible measures: £8,000

• Standard VAT at 20% would be £1,600

• With 0% VAT correctly applied, VAT is £0

• All else equal, the total could be £1,600 lower than a standard‑rated job.

That said, installers may not always pass the full saving through in the way you might expect (for example, if their costs have risen). Your protection is that the invoice must show the VAT rate applied, and you can challenge an incorrect rate.

Why this relief exists

The policy intent is to remove a tax barrier to upgrades that can reduce household energy demand and support lower‑carbon energy. In practice, it aims to make it easier for households (and some charities) to choose measures like insulation, solar PV and heat pumps, especially when energy prices are volatile.

This is also why the rules focus on installation rather than simple “over‑the‑counter” sales. The government’s goal is to support actual improvements to buildings, not general retail sales of products that might never be installed or might be installed in non‑qualifying settings.

How this connects to bills and the real world

The UK energy market has been through sharp price movements in recent years, and even when prices fall, bills remain a major household concern. For example, the energy price cap for a “typical household” paying by Direct Debit for gas and electricity was set at £1,641 per year for the period 1 April to 30 June 2026, and Ofgem notes that energy prices can move up or down each quarter based on underlying costs (including VAT on domestic energy at 5%). That context helps explain why government levers that reduce the cost of demand‑reducing measures (like insulation or efficient heat) matter to consumers.

What this guide will help you do

VAT rules can feel technical, but from a consumer perspective your goal is to answer four questions:

• Is my property the right type of building for the relief?

• Is the thing being installed on the official list of qualifying energy‑saving materials?

• Is the work being supplied in a way that qualifies (especially if there are other works bundled in)?

• Does the quote/invoice clearly apply the correct rate?

When the 0% rate applies and where in the UK it applies

The first thing to get clear is that the 0% VAT rate for energy‑saving materials is time‑limited and the start date has differed across the UK. This matters most if your project spans key dates, you paid a large deposit early, or your installation happened in Northern Ireland during the earlier part of the relief period.

The temporary zero rate and what happens after it ends

The relief is set up as a temporary measure. In broad terms:

• There is a defined period where eligible installations can be zero‑rated (0%).

• After the end of that period, the same types of installations are expected to revert to the reduced rate (5%), rather than the standard rate (20%), assuming no further policy change.

It’s helpful to think of it as a “window” during which the VAT treatment is most generous.

Where it applies across the UK

VAT is a UK‑wide tax, but the operation of VAT rules in Northern Ireland for certain goods-related supplies has differed in recent years. The result is that the temporary zero‑rate started earlier in Great Britain than it did in Northern Ireland.

VAT rate by date and UK nation

The table below gives a consumer-friendly view of the key timing. (If you’re dealing with work before these dates, the rules were different and often involved additional eligibility conditions.)

LocationWhen the temporary 0% VAT applies to eligible installationsWhat rate is expected after the temporary periodEngland, Scotland and Wales (Great Britain)1 April 2022 to 31 March 2027From 1 April 2027, expected to revert to 5%Northern Ireland1 May 2023 to 31 March 2027From 1 April 2027, expected to revert to 5%

How “the date” is decided in real projects

As a consumer, you don’t need to master VAT “tax point” rules, but you do need to know this: VAT is tied to when the supply is treated as taking place, and that is usually driven by invoicing, payments, and completion of the work.

In everyday terms:

• If your installer finishes and invoices during the eligible window, 0% is more likely to apply (assuming all other conditions are met).

• If your job is delayed beyond the end of the window, the VAT rate could change for the part supplied after the window ends.

• If your project involves staged payments, the supplier may treat parts of the supply as taking place at different times.

Because the supplier has to account for VAT correctly, they should be able to explain how they’ve treated the timing — and you should expect the paperwork to reflect it clearly.

A quick “where and when” checklist

Before you assume you’ll get 0% VAT, sanity‑check these points:

• Is the property in Great Britain or Northern Ireland?

• Is the installation date clearly within the temporary window for that location?

• Does the quote/invoice identify the work as an installation (not just a supply of goods)?

• Is the measure one of the specified energy‑saving materials (not just “energy efficient”)?

Who can benefit and which properties are covered

A common misconception is that 0% VAT depends on who you are (for example, whether you’re a pensioner, a first‑time buyer, or on a particular benefit). For this relief, the core test is usually about what is being installed and where it is being installed, not your income or personal circumstances.

Who can benefit in practice

From a consumer point of view, the relief can benefit anyone paying for eligible installations in qualifying buildings, including:

• Homeowners (owner‑occupiers)

• Landlords upgrading rental properties (where the building qualifies as residential accommodation)

• Tenants, where the tenant is the customer contracting and paying for the work (less common, but possible)

• Housing associations and similar providers where the relevant building test is met

• Charities, where a building is intended to be used solely for a relevant charitable purpose (from 1 February 2024)

The reason this matters: if you’re a landlord upgrading a buy‑to‑let flat, you may still qualify because it’s “residential accommodation” even though you don’t live there. Likewise, self‑catering holiday accommodation can qualify under the residential accommodation definition used for this relief, but hotels and similar establishments do not.

Residential accommodation: what it means for this VAT relief

HMRC’s definition is broader than “a normal house”. It includes obvious cases such as houses and flats, but also certain types of communal living and institutions. In consumer‑friendly terms, it can include:

• Typical dwellings (houses, flats, maisonettes)

• Residential settings such as student accommodation and some forms of care accommodation

• Some forms of permanent habitation accommodation, such as certain park homes/static caravans on permanent residential parks and some houseboats used as a sole/main residence (with domestic rates/Council Tax)

Just as importantly, some buildings are explicitly treated as non‑qualifying for this relief, even if people sleep there:

• Hospitals, prisons and similar institutions

• Hotels, inns and similar establishments

If you’re in a grey area — for example, a building with mixed use (shop with a flat above), a property run partly as a business, or accommodation where residents come and go — the “what is the building?” question becomes more nuanced.

“In, or in the curtilage of” the building

You’ll sometimes see the wording “in, or in the curtilage of” residential accommodation. Curtilage is essentially the land immediately around a building that is closely associated with it (often, but not always, the garden/drive/yard).

This matters because some qualifying technologies may be installed:

• on the building itself (solar PV on a roof)

• within the building (heating controls, insulation)

• within the immediate grounds (ground loops for a ground source heat pump)

If your equipment is being installed further away (for example, on adjoining land you own but that is not clearly part of the home’s curtilage), you should expect your installer to consider the position carefully.

Buildings intended solely for relevant charitable purposes

From 1 February 2024, the relief was extended to buildings intended to be used solely for a relevant charitable purpose. In plain language, this is aimed at buildings used by charities in non‑commercial ways, including community facilities such as village halls.

Two practical points matter for charities:

• The building must be intended for use solely for the qualifying charitable purpose (mixed use can create problems).

• Installers are expected to take reasonable steps to confirm the intended use and keep some evidence (for example, a letter).

Quick examples to anchor the rules

These examples show the kind of thinking installers should apply:

• Qualifying (typical): air source heat pump installed at a house; solar PV installed on a flat roof; loft insulation installed in a bungalow.

• Qualifying (less obvious): insulation installed in student accommodation; heat pump installed in a care home that meets the “residential accommodation” criteria.

• Not qualifying (building type): solar PV installed on a hotel; insulation installed as part of a prison project.

• Potentially complex: solar PV on a building that is partly residential and partly commercial (apportionment may be needed).

What counts as energy-saving materials

The phrase “energy‑saving materials” sounds broad — but for VAT purposes, it is a defined list. The relief applies to specified categories of materials and equipment when they are installed in the right type of building, in the right way, during the temporary period.

Why the official list matters

From a consumer standpoint, the single most important rule is this:

• If it is not on the specified list (or clearly within one of the listed categories), it is unlikely to qualify for 0% VAT under this relief — even if it is energy efficient.

That’s why you’ll see some products (like insulation and solar PV) commonly advertised with 0% VAT, while others (like double glazing) are not.

The categories of qualifying energy-saving materials

The table below summarises the categories, with plain‑English examples. It is intentionally consumer‑focused: installers and HMRC may use more technical descriptions.

The qualifying categories at a glance

What “installed” means (and why permanence matters)

For this relief, “installation” is about putting materials in place so they form part of the building or its systems. In most cases, that involves permanent fixing.

There are sensible real‑world exceptions — for example, loft insulation can be installed by laying it out without physically fixing every part — but the key idea is that the measure becomes part of the building’s energy performance.

This is one reason the relief is not aimed at portable devices or goods bought for possible future use.

Associated works and equipment

Another point consumers often miss: many of these systems include essential components beyond the headline item.

For example:

• A solar PV installation is not just “panels”; it may involve mounting, wiring, inverters, isolators, generation meters and (increasingly) batteries or diverters.

• A heat pump installation can involve pipework, cylinders, radiators, control systems and, for ground/water source systems, significant preparatory works.

Whether those extra elements qualify at 0% VAT often comes back to how the supply is characterised: are they part of the installed qualifying system, or are they separate supplies, or are they part of a larger non‑qualifying project?

Common measures that usually qualify

Most households will never install a wind turbine or micro‑hydro system, but many will consider insulation upgrades, solar PV, heating controls and heat pumps. This section focuses on the measures that most commonly fall within the rules — and the practical details that make the difference between a smooth 0% VAT invoice and a stressful surprise.

Heating controls and “smart” upgrades

Heating controls are often the simplest qualifying improvement because they can be installed without major building work. Typical examples include:

• Thermostatic radiator valves (TRVs)

• Room thermostats (including smart thermostats where they control the central heating/hot water system)

• Timers/programmers for heating and hot water

• Zoning controls and sensors where used to manage heating/hot water demand

Where people get caught out: controls can qualify when supplied as a qualifying installation, but if you buy “a whole new heating system” with a conventional boiler and radiators as one package, the controls can be treated as part of that larger standard‑rated supply. The most reliable route is to make sure the invoice describes the work as the installation of qualifying controls, not as part of a wider, standard‑rated bundle.

Insulation and draught proofing that tends to qualify

Insulation is one of the clearest categories, and it covers more than loft rolls. In everyday projects, you may see:

• Loft insulation top‑ups and upgrades

• Cavity wall insulation

• Solid wall insulation (internal or external)

• Floor insulation (particularly suspended timber floors)

• Roof insulation in rooms‑in‑roof

• Lagging/insulation for hot water cylinders and pipes

• Draught stripping around openings and hatches

A practical tip: if you’re also doing “nice‑to‑have” work (for example, redecorating, new plastering, a loft conversion), ask for the insulation and draught proofing to be clearly scoped and priced — otherwise, the insulation may become an ancillary part of a larger, standard‑rated project.

Solar PV, batteries and smart diverters

Solar is now mainstream in many parts of the UK. A typical domestic solar PV project often includes:

• Panels and mounting system

• Inverter and electrical protection/isolation

• Cabling and connection work

• Monitoring equipment (where supplied as part of the system)

• Optional additions such as battery storage and smart diverters

Battery storage has also become more common, and since 1 February 2024 the relief includes:

• Retrofit batteries added to an existing solar/wind/water microgeneration system

• Standalone batteries that store electricity from the grid

• Batteries that store from both microgeneration and the grid

Smart diverters (also included from 1 February 2024) are typically used to direct surplus generated electricity to loads within the building (for example, immersion heaters or other equipment), rather than exporting all surplus to the grid.

Heat pumps (air, ground and water source)

Heat pumps are among the most impactful (and complex) upgrades, and they are explicitly covered when installed in qualifying buildings.

In practice, domestic heat pump installations often include more than the heat pump unit:

• Hot water cylinder upgrades (where needed)

• Control system upgrades

• Pipework changes

• Radiator upgrades and balancing to suit lower flow temperatures

• For ground/water source systems: pipework loops/arrays and preparatory groundworks

From a VAT point of view, the key consumer takeaway is this: when a heat pump is the principal element of the supply, the supply can often be treated as a single qualifying supply even if it includes other components you might not expect to be “energy‑saving materials” on their own.

Less common but still relevant: micro‑CHP and wood‑fuelled boilers

Two technologies appear in the list but are less common in typical households:

• Micro‑CHP: generates heat and some electricity together.

• Wood‑fuelled boilers: the rules focus on boilers designed to burn wood only (not multi‑fuel). These are different from stand‑alone wood stoves.

If a supplier suggests 0% VAT for a multi‑fuel boiler or a stand‑alone wood stove, treat that as a red flag and ask for the legal basis.

How common are energy-efficiency measures in the UK?

Government statistics show large volumes of energy efficiency measures being installed through schemes each year. Recent headline statistics report hundreds of thousands of measures delivered annually, with heating controls and insulation forming a significant share. This aligns with what households most frequently choose: relatively quick, proven measures that can reduce heat loss or improve heating control.

Measures and situations that do not qualify

One of the quickest ways to avoid disappointment is to separate “good for energy efficiency” from “qualifies for 0% VAT under this relief”. The overlap is substantial — but it is not complete. This section covers the most common misunderstandings and the scenarios where the VAT rate is likely to be standard‑rated.

Energy-efficient products that are not on the qualifying list

Many popular home upgrades are energy‑saving in a common‑sense way but are not treated as qualifying “energy‑saving materials” for this relief. Common examples include:

• Energy‑efficient boilers (when they are conventional boilers rather than qualifying heat pumps or other listed technologies)

• Secondary glazing and double glazing

• Low‑emissivity glass upgrades

• Energy‑efficient household appliances (for example, fridges/freezers, washing machines)

• General building fabric upgrades that are not insulation or draught stripping (for example, new roofing materials that are “better”, but not an insulation installation as such)

The key is not whether an item is efficient, but whether it fits within the specific VAT category list.

Non-qualifying building types and settings

Even if the measure itself is qualifying, the installation may not qualify for 0% VAT if the building is outside the eligible building definitions for this relief. Installations are typically standard‑rated when they are in:

• Hotels, inns and similar establishments

• Hospitals, prisons and similar institutions

• Purely commercial premises (offices, shops, factories) unless part of a qualifying residential/charitable building context

If a building contains both qualifying and non‑qualifying areas (for example, a shop with a flat above), the VAT treatment can become more complex and may involve splitting the supply.

Portable, temporary and “not really installed” items

The relief is about installation, typically involving permanent fixing. In consumer terms:

• Portable or moveable air conditioning units are unlikely to qualify.

• Plug‑in gadgets marketed as “energy savers” (but not installed as part of a building system) are not what this relief is for.

• If an item could be removed without leaving the building meaningfully changed, it may be harder to treat as “installed” for this purpose.

When the thing you’re buying is really a different supply

Even where qualifying materials are present, VAT can follow the main supply you are buying.

For example:

• If you are buying the construction of an extension, and insulation is included as part of that construction, the overall supply may be treated as an extension build (often standard‑rated), not a separate insulation installation.

• If you buy a standard central heating system with a conventional boiler and radiators as a package, that package is not the same as “installing qualifying heating controls”, even if controls are included.

Common “does this qualify?” scenarios

The table below is designed as a practical starting point. Real VAT liability always depends on the facts and the way the supply is structured, but these are the patterns that commonly apply for households.

The supply-and-installation rule and why it matters

Most VAT mistakes happen not because the technology is wrong, but because the supply is structured in a way that changes the VAT outcome. For consumers, the big idea is that VAT is applied to the supply you are buying — which is defined by the contract and invoice — not by what you hope the law will treat it as.

VAT follows the contract and invoice

Two households can have the same physical end result (for example, the same brand of solar panels on the same type of roof) and still see different VAT treatment depending on how they bought it.

Ask yourself: who is supplying what, and under which contract?

• If one supplier sells you panels and another sells you installation services, you have (at least) two supplies.

• If one supplier supplies and installs as a single contract, you have one supply.

That distinction is central to whether the materials themselves can benefit from the 0% rate.

The three most common supply structures

From a practical consumer perspective, these are the patterns you’ll see:

1. Supply-and-install from one installer

   • Most straightforward route to 0% VAT on eligible work

   • You receive one quote/invoice covering goods and installation

2. Installation-only (you bought the materials elsewhere)

   • The installation service can still be eligible where it is the installation of qualifying energy‑saving materials in a qualifying building

   • But you may have already paid VAT at standard rate on the goods when you bought them

3. Supply-only (retailer sale)

   • Normally standard‑rated for consumer purchases

   • You do not get a VAT refund later simply because you installed the item at home

Why installers ask “Is it residential?”

You’ll often be asked to confirm the building type and address details. This is not just admin: the installer is trying to establish whether the supply is eligible.

If the building is clearly a house or flat, that’s easy. It becomes more important where the building type is less obvious:

• mixed use (shop + flat)

• accommodation businesses (holiday lets vs hotels)

• charities (is the building intended solely for relevant charitable purpose?)

A legitimate supplier will normally be comfortable explaining why they believe 0% VAT applies (or doesn’t), because they are the party responsible for accounting for VAT correctly.

VAT registration status still matters

If a supplier is not VAT‑registered, they should not charge VAT at all — so you won’t see “0% VAT” on the invoice, because there is no VAT line to apply. That is not automatically “better” or “worse” for you; it depends on their underlying costs and pricing.

Practical points to keep in mind:

• A non‑VAT‑registered installer cannot reclaim VAT on materials they buy, which can affect their pricing.

• If a supplier claims to be VAT‑registered but cannot provide a VAT number, treat that as a red flag.

• If a supplier is VAT‑registered and applies the wrong rate, they can correct it by issuing proper VAT documentation (credit note and corrected invoice).

When multiple trades are involved

In many projects (especially heat pumps and solar), multiple trades may be involved — electricians, plumbers, roofers, scaffolders. As a consumer, what matters is who is contracting with you and how they are bundling those supplies.

• If you have one principal contractor who supplies and installs the qualifying system and subcontracts parts of the work, your invoice from the principal contractor is usually the key VAT document.

• If you have separate contracts with multiple trades, each trade must consider the VAT on their own supply.

DIY, materials-only purchases and online orders

Many people are comfortable buying insulation, heating controls or even solar kit online — and then either fitting it themselves or hiring someone for the labour. That can be a sensible route for some projects, but it’s also one of the easiest ways to accidentally lose the benefit of 0% VAT on materials.

Buying the materials yourself: what VAT to expect

If you purchase qualifying items from a retailer (including online retailers), the sale is typically a supply of goods only. For most consumer purchases, that means:

• the retailer charges VAT at the standard rate (often 20%)

• you pay that VAT at checkout

• you do not later reclaim that VAT simply because the item is installed at a qualifying property

If you then hire an installer to fit those goods, you may still be able to benefit from 0% VAT on the installation service, depending on the exact circumstances and how they invoice you.

A practical consequence:

• For expensive measures like solar PV, buying the kit yourself can mean paying thousands of pounds of VAT that you might have avoided if the installer supplied the materials as part of a qualifying supply-and-install contract.

DIY installation: the VAT relief does not “refund” DIY purchases

If you install the materials yourself, you’ve still bought them in a standard retail transaction. There is no general household mechanism to reclaim VAT on energy‑saving materials.

There are separate VAT refund schemes for specific situations (for example, self‑build new homes), but those are not the same thing as this 0% VAT relief and have their own strict rules.

Online orders, overseas sellers and imports

Online buying introduces extra complications:

• UK retailers: you’ll usually be charged UK VAT at checkout (standard rate for goods sold “over the counter”).

• Overseas sellers: you may face import VAT and customs considerations depending on the supply chain and delivery terms.

• Marketplace listings: the VAT treatment can be unclear if you don’t know where the goods are being supplied from and by whom.

From a practical consumer perspective, if your goal is to benefit from 0% VAT on eligible materials, the cleanest route is often to:

• buy via a UK installer who supplies and installs the qualifying system and invoices it appropriately

How to avoid common DIY-related VAT pitfalls

If you do want to buy materials yourself (for cost control, product choice, or availability), use this checklist:

• Ask the installer in advance whether they will invoice their installation service at 0% and how they will describe it on the invoice.

• Confirm that the product you are buying is genuinely within the qualifying categories (for example, “heating control” in the VAT sense, not a general smart home gadget).

• Avoid bundling your installation service into a larger, standard‑rated project (for example, “general refurbishment”) unless you are comfortable that the VAT could follow that larger supply.

• Keep all purchase records: product descriptions, order confirmations, delivery notes and invoices.

When it may still be worth doing

DIY/retailer purchase can still make sense when:

• the goods are low cost and the VAT difference is relatively small

• you already own the goods (for example, a battery supplied under a separate arrangement)

• you are doing a minor upgrade (like draught stripping) and the complexity of using an installer supply-and-install package is not worth it

Ancillary works, repairs and replacements

Real buildings are messy. Installing energy‑saving materials often requires extra work: access, making good, electrical preparation, or groundworks. VAT doesn’t ignore those extras — it asks whether they are part of the qualifying installation or part of something else.

What counts as “ancillary” work (and why it matters)

Ancillary work is work that is not the customer’s main aim, but is done to enable or support the main installation.

In consumer language, ancillary work is the “we have to do this so we can install the thing you’ve actually hired us for” work.

Examples that are often ancillary to a qualifying installation include:

• Cutting or altering access points (for example, creating a loft hatch to install loft insulation)

• Minor making good after an installation (patch repairs, re‑fixing boards removed for access)

• Scaffolding needed to fit solar panels (where it’s part of the same supply)

• Trenching/drilling to lay ground loops for a ground source heat pump, where it is necessary for that installation

• Dredging or other preparatory work required for a water source heat pump installation (where supplied as part of the installation supply)

When work is truly ancillary, it often follows the VAT treatment of the principal supply.

When “extra work” is no longer ancillary

Problems arise when the additional work becomes an aim in itself, or when the customer’s main goal is something else.

Examples where the VAT position can change include:

• You are buying a larger building project (extension, renovation, re‑roofing) and insulation is just one part of it.

• You are upgrading multiple systems at once (kitchen refit + insulation + heating upgrade) under one contract and one price.

• The “extra work” is substantial (for example, major structural changes) and cannot reasonably be described as simply enabling the installation.

In those cases, a supplier may need to treat the overall supply differently — and the VAT rate may follow the main element of the overall project.

Repairs and maintenance: treat with caution

This relief is framed around installation. Repairs and ongoing maintenance can be treated differently for VAT.

For consumers, a good rule of thumb is:

• Replacing a qualifying measure with a new qualifying measure (for example, replacing an old heat pump with a new one) is likely to be treated as a new installation, not a repair.

• Fixing an existing system (for example, repairing a fault on a solar inverter or servicing a heat pump) may not automatically fall within the installation relief, depending on how it is supplied and described.

Because repairs can be complex, you should ask the supplier to confirm:

• whether the work is being treated as an installation of qualifying energy‑saving materials, or as a repair/maintenance service

• the VAT rate they intend to apply and why

Replacements within larger systems

Some replacements look minor but have VAT significance.

Examples:

• Replacing individual heating controls can be an installation of qualifying controls if it is supplied as such.

• Replacing radiators as part of a heat pump conversion may be treated as part of the overall qualifying heat pump supply where the heat pump is the principal element.

• Replacing radiators within a conventional boiler system may fall within a standard‑rated central heating system supply unless it is a distinct qualifying supply under other rules (for example, grant-funded reduced‑rate rules).

How to reduce disputes with better scoping

To reduce the risk of VAT surprises:

• Ask for a clear scope of works separating: qualifying installations, enabling/ancillary works, and any other building works.

• Avoid “one line” quotes that bundle everything together unless you are confident the overall supply is qualifying.

• If you are doing multiple jobs at the same premises, consider separate contracts or clearly separated pricing and invoicing.

Mixed projects, bundled quotes and how VAT is calculated

If you’re only doing one clear measure (for example, loft insulation) with one installer, VAT can be simple. As soon as you combine multiple measures — or combine qualifying measures with other home improvements — VAT becomes a question of whether you are buying one supply or several.

Single supply vs multiple supplies: the concept that drives most outcomes

A single supply is where, viewed realistically, you are buying one overall thing, and the other elements are there merely to help deliver it.

Multiple supplies (sometimes called mixed supplies) exist where distinct goods/services are being supplied, each with its own purpose, and it makes sense to treat them separately.

From a consumer perspective, indicators that you may be buying a single supply include:

• one overall price for a “package”

• a single contract covering everything

• the supplier markets it as a single product (“heat pump upgrade package”, “extension package”)

• you could not realistically choose the elements separately

Indicators that you may be buying multiple supplies include:

• separate prices, or clear line‑by‑line pricing

• separate contracts or separate invoicing

• different timing (one job later than another)

• the elements make sense as standalone purchases

Why this matters for VAT

A single supply has one VAT rate. So if the principal element is standard‑rated, the whole supply can become standard‑rated, even if it includes qualifying energy‑saving materials.

If there are multiple supplies, each supply can carry its own VAT rate.

Real-world examples households commonly face

Here are common combinations and the typical VAT risks:

• Extension build + insulation in the new walls/roof
  Even though insulation is qualifying in principle, the main thing you’re buying may be the extension construction. If it is treated as a single supply of construction services, it can be standard‑rated.

• Conventional boiler heating system + heating controls
  Controls can qualify in isolation, but a conventional boiler‑based central heating system is not on the qualifying list for this relief. If it is one package, it can be standard‑rated overall.

• Heat pump conversion that includes new radiators and pipework
  If the heat pump is the principal element, the overall supply can often be treated as a single qualifying supply during the temporary period, even though some components (like radiators) are not listed on their own.

• Roof replacement + solar PV
  If the quote is one “roofing project” that happens to include solar panels, solar can become part of a standard‑rated supply. If solar is clearly separately priced and contracted, it is more likely to retain the qualifying treatment.

A simple worked example of apportionment

Imagine a home upgrade where two distinct jobs are genuinely separate:

• Solar PV supply-and-install: £7,500

• Roof repairs (not part of solar install): £3,000

If treated as separate supplies, VAT may be:

• Solar PV: 0% VAT during the temporary period (if conditions met) → £0 VAT

• Roof repairs: standard‑rated (often 20%) → £600 VAT

Total VAT: £600

If treated as one single roofing/repair project with solar “included”, the whole supply may become standard‑rated — and the VAT could be much higher. This is why structure and paperwork matter.

How to protect the relief when using a “bundle”

Bundled quotes can be convenient, but you should ask for clarity. Practical steps:

• Ask the supplier to explain whether they are treating the project as one supply or multiple supplies for VAT.

• Ask for separate lines (and ideally separate pricing) for qualifying installations versus other works.

• If work is staged, request separate invoices at the relevant stages, reflecting the separate supplies.

• If the supplier insists it is one package, ask them to confirm in writing the VAT rate and why it applies.

What to ask for in quotes, contracts and invoices

You do not need to become a VAT specialist to protect yourself. What you do need is clear paperwork. If 0% VAT is genuinely due, a professional supplier should be able to show it clearly, confidently, and consistently across the quote, contract, and invoice.

Questions that quickly reveal whether a supplier is confident on VAT

Before you accept a quote, ask:

• Are you VAT‑registered? If yes, what is your VAT number?

• Which elements of this quote are being charged at 0% VAT, and why?

• Is this quote structured as supply-and-install, installation only, or supply only?

• Are there any other works included that could change the VAT treatment (for example, an extension build, major roof works, general refurbishment)?

• What assumptions are you making about the property type (house/flat/holiday accommodation/charity building etc.)?

• If this is a charity building, what evidence do you need from us to confirm the intended use?

A reliable supplier won’t treat these questions as awkward — they’ll recognise that you’re being a careful consumer.

What a “good” quote looks like for VAT purposes

You don’t necessarily need every line item costed, but a good quote should include:

• A clear description of the works (what is being installed)

• Confirmation of the property address

• A breakdown between qualifying installations and any other works

• VAT rate shown clearly per section or per line (0%, 5%, 20% as applicable)

• The total price and VAT amount

Be cautious of quotes that say “VAT included” without specifying the rate, or that promise “0% VAT” with no mention of what happens if the property or scope is not eligible.

VAT invoice essentials to check

A VAT invoice should normally show (among other things):

• Supplier name and address

• Supplier VAT registration number (if VAT‑registered)

• Invoice date and invoice number

• Your name/address (or at least the property address where work was done)

• Description of the supply

• VAT rate applied and VAT amount

If the invoice shows VAT charged at 20% but you believe the work qualifies for 0%, the next section explains how to fix it — but the first step is having a clean invoice to work from.

Paperwork checklist for 0% VAT eligibility

What to do if the supplier says “we don’t need evidence”

For typical houses and flats, a supplier may not need much evidence beyond the address and common sense. But for charities or less obvious buildings, it is reasonable for an installer to ask for documentation.

For example, for a charity building intended solely for relevant charitable purpose, installers are expected to take reasonable steps to check intended use and keep documentation (often a simple letter).

How to fix problems if you are charged the wrong VAT rate

Being charged the wrong VAT rate is frustrating — but it is usually fixable. The key is to approach it methodically: confirm whether it is genuinely an error, then ask the supplier to correct it using the proper VAT process.

Step 1: Confirm whether the rate is actually wrong

Before you challenge a supplier, check four things:

• Is the measure qualifying? (For example, solar PV and heat pumps are; double glazing is not.)

• Is the building qualifying? (For example, a house is; a hotel is not.)

• Is the supply structure qualifying? (Supply‑only retail purchase is different from installation services.)

• Is the timing within the temporary period for your nation?

It’s very common for consumers to assume “it’s green, so it’s 0% VAT”. The rules are narrower than that.

Step 2: Ask the supplier to correct the VAT in writing

If you still believe the VAT is wrong, contact the supplier with:

• your invoice number and date

• the property address

• the specific line(s) you believe should be 0% VAT

• a clear explanation of why (for example, “installation of [qualifying measure] in residential accommodation during the temporary zero-rate period”)

A professional supplier can correct a VAT mistake by:

• issuing a credit note for the original invoice (or for the VAT element), and

• issuing a new corrected invoice showing the correct VAT treatment

This is the cleanest outcome because it creates a proper audit trail for the supplier and clear evidence for you.

Step 3: If the supplier is unsure, help them get to an answer

Not every installer is equally confident on VAT. If they are hesitant, suggest they:

• check HMRC’s guidance (VAT Notice 708/6 and related guidance on building types and supplies)

• speak to their accountant or VAT adviser

• contact HMRC’s VAT helpline for guidance on the general rules (they cannot get “approval” for a specific invoice, but they can ask for clarification)

Step 4: Escalation options if you cannot resolve it

If the supplier refuses to correct an error, consider:

• Alternative dispute resolution (ADR) if the supplier is in a consumer code scheme (common in renewables)

• Citizens Advice for consumer rights guidance and Trading Standards escalation routes

• Chargeback through your card provider (if applicable) or Section 75 protection (for credit card payments meeting the legal criteria)

• Small claims as a last resort, especially where the VAT error is clear and material

Keep your communication calm and evidence‑based. VAT disputes often resolve faster when you focus on the factual criteria rather than on whether the supplier “should” be able to do it.

A practical email template you can adapt

• State what you purchased and where it was installed.

• State the VAT charged and what you believe it should be.

• Ask for a corrected VAT invoice and credit note.

• Provide a deadline for response (for example, 7–14 days) and note that you will seek advice if unresolved.

Don’t ignore the emotional side

It’s normal to feel anxious if you think you’ve been overcharged — especially on a large project like a heat pump. The reassuring reality is that VAT errors are administrative problems, not moral failings. Most legitimate suppliers will correct genuine mistakes when you raise them clearly.

Grants, subsidies and how they interact with VAT

Many households encounter 0% VAT at the same time as grant schemes and subsidies — especially for heat pumps and insulation. That can make invoices look confusing: sometimes you’ll see a grant deduction, sometimes you’ll see different VAT rates, and sometimes a supplier may apply the wrong logic entirely.

This section will help you understand the typical interactions, without drowning you in tax jargon.

The reassuring headline: 0% VAT is not limited to grant-funded work

For the temporary period, the 0% VAT relief for energy‑saving materials is not restricted to “low income” households or grant recipients. If the supply qualifies, it can qualify whether or not you received a grant.

That means:

• A privately funded solar PV installation can be 0% VAT.

• A heat pump installation supported by a grant can also be 0% VAT — but the grant affects what you pay, not whether the supply is eligible.

Why you might still see 5% VAT on some grant-funded projects

There is a separate set of VAT rules that can apply to certain grant-funded heating equipment that does not qualify under the “energy‑saving materials” list. Under those rules, the reduced rate (5%) can apply to the grant‑funded portion of certain heating installations in qualifying circumstances.

In practice, consumers might see:

• 0% VAT for qualifying energy‑saving materials (during the temporary period)

• 5% VAT for certain grant-funded heating equipment installations where the work does not fall within the energy‑saving materials list

• 20% VAT for non‑qualifying building work, and sometimes for the customer‑funded portion of some grant-funded installations (depending on how the rules apply)

This is one reason invoices can show multiple VAT rates.

Partial funding: how it can affect the invoice

Many grants do not cover the full cost. The invoice may show:

• the full price of the installation

• a grant contribution (sometimes paid directly to the installer)

• the net amount payable by you

The VAT treatment depends on the nature of the supply and the specific VAT rules that apply. Where reduced‑rate grant rules apply (rather than the 0% ESM relief), HMRC guidance indicates that reduced rating can be limited to the extent the supply is grant‑funded, with other contributions treated differently.

For households, the key practical point is to make sure the invoice is internally consistent:

• If the installation is a qualifying energy‑saving material installation during the temporary period, you would expect 0% VAT on that supply, regardless of the grant.

• If the work is not within the qualifying list and the supplier is relying on a grant-funded reduced‑rate rule, you would expect the supplier to show clearly how the grant-funded and non‑grant-funded elements have been treated.

Grants vs discounts: why VAT can look odd

Some schemes operate as:

• a grant paid to the installer to reduce your price, or

• a voucher/discount mechanism, or

• a payment to you after installation.

VAT law distinguishes between payments that are genuine grants (outside the scope of VAT) and payments that are effectively part of the consideration for a supply (for example, a subsidy directly linked to reducing the customer’s price). This distinction is more relevant to scheme administrators and suppliers than to households, but it explains why the invoice format can vary.

If the paperwork is unclear, ask the supplier:

• “Is the grant treated as a price reduction on my invoice, or as third‑party funding of the supply?”

• “Does that affect the VAT you are charging me?”

Common schemes you may encounter (and what to ask)

Across the UK, household schemes can include (names and eligibility rules change over time):

• heat pump support schemes (for example, the Boiler Upgrade Scheme in Great Britain)

• energy supplier obligation schemes supporting insulation and heating measures

• local authority or devolved government schemes targeting low‑income homes

The VAT question to ask is always the same:

• Does the work qualify as an installation of specified energy‑saving materials in a qualifying building, and is it being invoiced accordingly?

Conclusion

0% VAT on energy‑saving materials can be a meaningful saving — but it is not automatic, and it is not based on marketing claims. It is based on a small set of legal tests: what is installed, where it is installed, how it is supplied, and when it is supplied.

What confident consumers do differently

Households who get this right tend to do three simple things:

1. They check eligibility early, before choosing products and suppliers.

2. They insist on clear paperwork, so the VAT rate is transparent in the quote and invoice.

3. They avoid accidental bundling, where qualifying work gets absorbed into a larger standard‑rated project.

A practical summary of the key points

Keep these points at the front of your mind:

• The relief is time‑limited, and the start date differed between Great Britain and Northern Ireland.

• The relief applies to specified categories of energy‑saving materials — not to every energy‑efficient product.

• The building must be qualifying residential accommodation, or (from 1 February 2024) a building intended solely for relevant charitable purposes.

• The relief applies to installation services and to supply-and-install by the installer; retailer supply‑only sales are treated differently.

• Mixed projects often turn on whether you are buying a single supply or multiple supplies, so the contract structure matters.

• If you are charged the wrong rate, it is usually fixable with a credit note and corrected invoice — and it is reasonable to ask for that correction.

Where to go from here

If you’re planning an energy‑saving upgrade, a simple next step is to prepare the following before you get quotes:

• Your property type (house/flat/holiday accommodation/charity building etc.)

• A clear scope of what you want installed

• Whether you want a single supplier to supply-and-install, or whether you plan to purchase materials yourself

• Any other building work you intend to do at the same time (which could affect VAT treatment)

Doing that upfront will reduce cost surprises and make it far easier to compare quotes fairly.

Frequently Asked Questions

Understanding 0% VAT

Timing and UK nations

What usually qualifies

What does not qualify

Supply and installation rules

DIY and materials-only purchases

Bundled projects and mixed works

Property types and tricky cases

Charities and community buildings

Grants, subsidies and funding

Invoices, evidence and fixing mistakes

Glossary

Useful organisations

HM Revenue & Customs (HMRC)

HMRC is the UK authority responsible for VAT. If you want to understand how VAT rules apply in practice (for example, when 0% VAT should apply to supply-and-install energy-saving measures), HMRC’s VAT guidance and helplines are the most authoritative starting point.

• 0300 200 3700
• www.gov.uk

Citizens Advice

Citizens Advice provides free, impartial support if you have a consumer problem with a trader or installer—such as being charged the wrong VAT rate, difficulties getting an invoice corrected, or disputes about what was supplied and installed. They can also pass relevant cases to Trading Standards where appropriate.

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

TrustMark

TrustMark is a government-endorsed quality scheme for work carried out in and around the home. It’s useful if you’re looking for a reputable installer for insulation, heating or retrofit-related work—and you want additional reassurance around standards, complaints routes and consumer protection.

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

Microgeneration Certification Scheme (MCS)

MCS certifies installers and products for small-scale renewable and low-carbon technologies (for example, solar PV and heat pumps). If your project involves these measures, MCS helps you check whether an installer is certified and supports consumer confidence in the installation process.

• 0333 103 8130
• mcscertified.com

References

Still have questions?

It’s completely normal to feel unsure about VAT on energy‑saving upgrades. The rules are technical, and the stakes can be high: a VAT mistake on a large installation can mean hundreds or thousands of pounds. If you’re in any kind of grey area, getting a quick sense‑check from someone who deals with these rules regularly can save you money and stress.

When it’s especially worth speaking to an expert

Consider speaking with an expert if any of these apply:

• Your building is not a straightforward home (for example, mixed use, unusual accommodation types, or a charity/community building).

• Your quote bundles qualifying work with other building works (extension, major refurbishment, roof replacement) and you’re unsure whether it is one supply or several.

• You are buying materials separately (online or through a merchant) and want to know whether the installation service can still be 0% VAT.

• You are using a grant or subsidy and your invoice shows multiple VAT rates (or the supplier cannot explain the VAT treatment clearly).

• You’ve already been invoiced at 20% VAT and the supplier is refusing to correct it, or you need help working out whether the supplier is actually right.

What an expert can help you do quickly

A good expert conversation doesn’t need to be long. In one structured call, an expert can usually help you:

• identify whether your proposed measure is on the qualifying list

• confirm whether your building is likely to be treated as qualifying residential accommodation or a qualifying charitable building

• spot VAT risks in bundled quotes and suggest safer ways to structure the supply

• draft a clear message to your supplier if you need a VAT correction

• sanity‑check invoices and supporting documentation

What to prepare before you speak to someone

To get the most value from expert advice, gather:

• the property address and a short description of the building (house/flat/holiday let/charity building etc.)

• the quote(s), including any breakdowns and terms

• notes on other works being done at the same time (even if by other contractors)

• any grant documentation or scheme letters if relevant

• a copy of any invoice already issued

A final reassurance

You don’t need to “win an argument” with your installer. You just need clarity and correct paperwork. Most legitimate suppliers want to get VAT right — and if your situation is genuinely complex, an expert can help translate the rules into a practical plan you can use.