It’s a common assumption that anything described as “energy-saving” qualifies for reduced VAT. For an ordinary gas boiler replacement, that assumption is usually wrong — standard 20% VAT normally applies.

Why a gas boiler is standard-rated

HMRC’s VAT notice on energy-saving materials and heating equipment is explicit that ordinary gas-fired boilers do not qualify for the 0% or reduced-rate relief available to energy-saving materials. The guidance states that the installation of “other energy-efficient products, such as energy-efficient boilers… are standard-rated,” meaning the normal 20% VAT rate applies to both the boiler unit and its installation, in the same way as most other home improvement work. This surprises some homeowners who assume that because a new condensing boiler is more efficient than the one it’s replacing, it should automatically attract the same relief as insulation or a heat pump. It doesn’t.

What actually gets the zero rate

The relief that does exist is genuinely generous, but it’s aimed at a specific list of technologies, not heating equipment generally. From May 2023 to March 2027, installing the following qualifies for the 0% VAT rate: ground, air and water source heat pumps; wall, floor, ceiling, roof and pipe insulation; solar panels and photovoltaic systems; wind and water turbines; wood-fuelled boilers; associated heating system controls; draught stripping; electrical battery storage; and smart diverters. A wood-fuelled boiler is on that list; a standard gas or oil boiler is not. This is the dividing line worth understanding before assuming a quote should reflect a reduced rate.

The grant-funded exception that does cover gas boilers

There is one specific circumstance where a gas boiler installation can attract a reduced 5% VAT rate rather than the standard 20%: where the installation is grant-funded under a qualifying scheme for a qualifying person, generally someone aged 60 or over, or someone receiving certain benefits. This exception exists because it sits under a different part of VAT law aimed at supporting vulnerable households with essential heating, rather than under the energy-saving materials relief aimed at decarbonisation technology. If you think you might qualify, ask your installer directly whether the specific grant scheme they’re proposing falls under this reduced-rate provision, since not every grant-funded installation automatically does.

Why the confusion happens

Much of the public confusion traces back to genuine, sweeping VAT changes to home energy efficiency measures announced in 2022 and taking effect from April 2023, which extended the zero rate to a wider list of technologies and removed some of the previous restrictions and caps. Heat pumps, solar panels and insulation were the headline beneficiaries of that change, and general reporting on “the VAT cut for green home upgrades” didn’t always make clear that a conventional gas boiler sat outside the change. If you’ve seen coverage suggesting boiler VAT has been cut, it’s worth checking whether that coverage was actually describing heat pumps or other qualifying technology rather than gas boilers specifically.

What to check on a quote

• For a standard gas, oil or LPG boiler replacement, expect 20% VAT on both parts and labour, and treat a quote showing a lower rate as something to query rather than accept at face value.
• If you’re being quoted for a heat pump, wood-fuelled boiler, solar thermal system or associated controls, 0% VAT should generally apply — if a quote shows 20% for one of these, ask the installer to explain why.
• If your installation is being funded through a specific grant scheme aimed at older or benefits-receiving households, ask explicitly whether the 5% reduced rate applies to your circumstances rather than assuming either the standard or reduced rate by default.
• VAT rules and the qualifying technology list can change; treat a quote’s stated VAT rate as something to double-check against current HMRC guidance rather than something fixed indefinitely.

FAQs

Does a highly efficient condensing boiler get any VAT relief for being efficient?

No — efficiency alone doesn’t determine VAT treatment. The relief is tied to the specific list of qualifying technologies (heat pumps, solar, wood-fuelled boilers and similar), not to how efficient a conventional gas boiler happens to be.

What about VAT on boiler servicing or repairs, rather than a full replacement?

Routine servicing and repair work on an existing boiler is standard-rated in the same way as a new installation; the energy-saving materials relief is specifically about installing qualifying technology, not maintaining existing equipment.

Can I claim back VAT on a new boiler myself?

For a domestic, non-business installation, VAT is charged by the installer as part of the normal price and isn’t something a private homeowner reclaims separately — the relief operates by changing the rate the installer charges at the point of sale, not through a later claim.

Sources

This guide draws on the following primary sources, current as of 17 September 2026:

• GOV.UK: VAT on energy-saving materials and heating equipment (Notice 708/6)

Related guides

Best Boiler Deals is an independent guide. We may earn a fee from some links; this never affects what we write. This article is general information, not tax advice on any specific installation — confirm current VAT treatment with your installer or HMRC.