0% VAT on Air Conditioning: What UK Homeowners Need to Know

Many fixed home air conditioning installations can currently be charged at 0% VAT because they are treated as air source heat pumps. The important details are that the system must be eligible, permanently fixed, and installed in qualifying accommodation by the supplier applying the correct VAT treatment.

The zero rate is temporary. HMRC guidance says the zero rate for installations of certain energy-saving materials runs until 31 March 2027. From 1 April 2027, those supplies are expected to revert to the reduced 5% VAT rate unless the rules change.

This does not mean every air conditioner is VAT-free. Portable units, moveable units, supply-only purchases, and separate non-qualifying works can be treated differently. Always ask the installer to explain the VAT rate shown on your quote before you accept it.

Modern fixed air conditioning is usually a reversible air-to-air heat pump. It can cool a room in summer and reverse operation to provide heating in colder weather. HMRC guidance says air source heat pumps use the air as a source of heat and that fixed air source heat pumps can also provide cooling.

HMRC also says its understanding is that most air conditioning units are air source heat pumps. That is helpful for homeowners, but it is not a blanket promise. If there is doubt about a particular product, the answer depends on the facts of that product and installation.

For a typical domestic split or multi-split system, the installer should be able to tell you whether the proposed equipment is being treated as an eligible air source heat pump and whether the installation is being zero-rated.

For an eligible installed system, the zero rate can apply to the installation service and to the energy-saving materials supplied by the installer as part of that installation. In a normal fixed AC quote, that may include the indoor unit, outdoor unit, pipework, controls, and installation labour when they form part of the qualifying supply.

The exact VAT treatment is for the installer to apply. If a quote includes other work at the same time, such as building work, repairs, decorative making good, or unrelated electrical work, the installer may need to decide whether those items are part of one qualifying supply or separate supplies with different VAT rates.

For homeowners, the practical point is simple: do not compare only the headline total. Check whether each quote includes VAT, what VAT rate has been applied, and whether any items have been separated out.

The most common misunderstanding is portable air conditioning. HMRC guidance is clear that only air source heat pumps that are permanently fixed and not portable or moveable qualify as energy-saving materials. A portable AC unit bought from a retailer should not be treated as a zero-rated installed heat pump.

Supply-only purchases are also different. If a retailer or supplier sells energy-saving materials without installing them, HMRC says that supply is standard-rated. The zero rate is about qualifying installations, not simply buying an eligible product in a box.

Repairs, servicing, maintenance visits, and replacement parts should also be checked separately. This article is about new qualifying installations, so do not assume the same VAT treatment applies to every later visit.

The saving depends on the pre-VAT price of the eligible installed work. If the same work would otherwise have been charged at 20% VAT, a 0% VAT invoice removes that VAT amount from the bill.

These examples use simple pre-VAT figures so the calculation is easy to see. They are not fixed prices, and they assume the whole example installation qualifies for the zero rate.

The VAT rate should be clear before you commit. A good installer should be able to explain whether the proposed system is being treated as an eligible air source heat pump, whether the quote is VAT inclusive, and whether any separate works have a different VAT rate.

This matters when comparing quotes. One installer may show the VAT saving clearly, another may quote a VAT-inclusive total, and another may separate out extra work. You need enough detail to compare like with like.

The Boiler Upgrade Scheme is separate from VAT. Current GOV.UK guidance says eligible homeowners can get £2,500 towards an air-to-air heat pump, subject to scheme rules, installer requirements, and product standards.

Do not assume the grant applies just because a system is zero-rated for VAT. The grant has its own eligibility checks, and the installer needs to advise whether the proposed installation can qualify. It is also separate from the VAT rate shown on the invoice.

For most homeowners comparing fixed AC quotes, the practical order is to ask first whether the system is eligible for 0% VAT, then ask whether any grant route is realistic for the property and installer.

AC Journey helps homeowners compare quotes from vetted UK air conditioning installers. We do not install systems directly or decide the VAT treatment of your invoice, but comparing installer quotes can help you spot whether VAT has been handled clearly.

When you request quotes, share whether you want cooling only, heating and cooling, one room, or several rooms. The installer can then advise on suitable fixed systems, expected running costs, VAT treatment, and any eligibility questions before you book work.