Battery storage VAT and capital allowances for business

VAT on battery storage and capital allowances on battery storage decide how much of a commercial battery’s cost comes back through the tax system, and both are routinely explained using rules written for homes. The short version: a battery installed at business premises is standard-rated for VAT at 20%, which a VAT-registered business can normally recover. For capital allowances, the Annual Investment Allowance (AIA) covers the first £1 million a year whichever pool the battery sits in. Above that, the law does not say whether a battery is main-rate plant (100% relief for a company) or special-rate plant (50%), and neither does HMRC’s published guidance.

This guide is general information, checked against the primary sources linked at the foot on 7 October 2026. It is not tax advice; confirm the position with your accountant before you file.

The short answers

• VAT: 20% standard rate on a battery installed at business premises. The 0% relief is for homes and solely charitable buildings and runs to 31 March 2027.
• Recovery: a VAT-registered business can normally reclaim the VAT through its return, unless it makes VAT-exempt supplies (partial exemption).
• Under £1 million: the AIA gives a 100% deduction in year one to companies, sole traders and partnerships of individuals, and it can be set against a battery whichever pool the battery belongs to.
• Over £1 million: a company claims the 50% first-year allowance on the special-rate spend above the AIA, and the rest is written down at 6% a year. On this site a battery is treated as special-rate plant, as HS252 treats solar panels.

VAT on battery storage

Why a business battery is standard-rated

HMRC’s VAT manual sets out when installing an electrical storage battery is zero-rated. The relief took effect on 1 February 2024, the zero rate runs to 31 March 2027, and the manual says supplies are reduced-rated after that. It covers installations in residential accommodation and in buildings intended for use solely for a relevant charitable purpose, and it covers both batteries retrofitted to renewable generation and standalone batteries that charge from the grid.

Nothing on that page extends the relief to a factory, warehouse, office, farm building, hotel or any other business premises. There the standard rate of 20% applies. The confusion comes from domestic guidance, where “0% VAT on batteries” is true and widely repeated. If a supplier tells you a commercial battery is zero-rated, ask which provision they are relying on. The rest of the buying process, from the connection to the steps to a working system, is in our buying guide to commercial batteries.

Recovering the VAT

A VAT-registered business can normally reclaim the VAT charged on goods and services it uses for its taxable business activities, by including it on its VAT return (HMRC’s VAT guide, Notice 700). Where a business also makes VAT-exempt supplies, partial exemption rules can make part of the VAT irrecoverable. A landlord letting commercial space without having opted to tax is a common example. A business that is not VAT-registered cannot reclaim any of it.

A worked example. A battery costs £180,000 before VAT, so the invoice carries £36,000 of VAT at 20%. A fully taxable business pays the £36,000 on the invoice and reclaims it on its next return, so the effect on cost is timing, not value. For a business that is not registered, or is heavily exempt, the budget figure is the gross £216,000.

Capital allowances on battery storage

The tax position is one of the six checks in our guide to commercial battery storage for UK businesses; this section is the detail.

Few pages on this subject mention capital allowances at all: our audit of what UK commercial battery pages leave out found none of eight explainer pages did. This section is the detail they skip.

A commercial battery is plant and machinery for capital allowances purposes. What differs between the routes below is how much relief you get in year one, who can use it, and which kind of plant it is available for.

Sources: GOV.UK on the Annual Investment Allowance, on the 50% first-year allowance and on rates and pools; HMRC Capital Allowances Manual CA23084. Companies controlled by the same person share a single AIA between them, so capital spend by those other companies in the year counts against the same £1 million.

If the project costs under £1 million

For most single-site projects the classification question never bites. HMRC’s manual says the AIA can be claimed on long-life assets, integral features and other special-rate spend as well as on general plant and machinery, and that the taxpayer is free to allocate it against any type of plant and machinery expenditure as they choose (CA23084). A battery that costs less than your remaining AIA therefore gets a 100% deduction in year one whichever pool it belongs in.

For a sense of scale, our commercial battery storage cost guide puts a 200 to 500 kWh system at £80,000 to £250,000 or more on published UK bands, comfortably inside the allowance unless other capital spend has already used it.

If the project costs more than £1 million: main-rate or special-rate?

Above the AIA, the classification decides the relief, and the sources are silent on batteries. This is what we found.

What the statute lists. Special-rate expenditure is defined in section 104A of the Capital Allowances Act 2001. The list covers thermal insulation, integral features of buildings, long-life assets, certain cars, cushion gas and solar panels. Batteries are not on it. Integral features are listed in section 33A: an electrical system (including a lighting system), a cold water system, a space or water heating system or a powered system of ventilation, air cooling or air purification, a lift, escalator or moving walkway, and external solar shading. Electricity storage is not named there either.

What HMRC’s manual says. The manual notes that “electrical system” is not defined in the legislation and takes its ordinary meaning: a system for taking electrical power from the point of entry to the building or structure, or generation within it, and distributing it through the building (CA22330). We read the three pages on integral features (CA22310, CA22320 and CA22330) for any mention of batteries, uninterruptible power supplies, generators or standby power, and found none.

The 25-year test. Long-life assets are items with a useful life of at least 25 years, and spending on them above £100,000 in an accounting period goes to the special-rate pool (GOV.UK). The only published planning assumption we found for a commercial battery’s life is 15 years, in the US National Renewable Energy Laboratory’s 2024 Annual Technology Baseline. That is a modelling assumption, not a legal test, but it is well short of 25.

What this site does with that. Neither the statute nor HMRC’s manual names a battery. HS252 does name solar panels as special-rate plant, and a commercial battery sits in the same electrical installation, so this site treats a battery as special-rate plant and does not describe the 100% main-rate relief as available for one. If your adviser classifies a particular battery differently in writing, that is their call to defend, not a figure to put in a board paper first.

What it means in numbers. Take a company with sufficient profits paying Corporation Tax at 25%, spending £1.5 million on special-rate plant:

The £250,000 above the first-year reliefs is relieved slowly through the special-rate pool. That timing difference has a real cost of capital, which is why it belongs in the model.

What to do about it. Where the spend exceeds your AIA headroom, ask a capital allowances adviser for a written classification before the board paper goes out, and show the outcome in the model. Do not accept a supplier’s statement that a battery is definitely main-rate or definitely special-rate unless they can point to the provision.

Correction, 29 October 2026: earlier versions of this page presented main-rate against special-rate as unsettled and showed a full-expensing outcome for a battery. This site now follows HMRC’s HS252 treatment of solar panels as special-rate plant and applies it to batteries: the Annual Investment Allowance first, then the 50% first-year allowance for companies. We no longer describe the 100% main-rate relief as available for a battery.

Groundworks, enclosures and the Structures and Buildings Allowance

Plant and machinery allowances stop at the building. Section 21 of the 2001 Act excludes the provision of a building, and section 22 excludes structures listed in its List B and “any works involving the alteration of land”, both subject to the exceptions in section 23. Separately, the Structures and Buildings Allowance gives 3% a year from 1 April 2020 on qualifying costs of structures used for a qualifying activity, but costs that also qualify for plant and machinery allowances are excluded (GOV.UK). For a containerised battery, the concrete base and groundworks are the likely candidates for that question. Whether any item is a building, a structure, part of the plant or something else is a matter for your adviser. The practical step is to ask your installer to price groundworks, the enclosure, the plant and the electrical connection as separate lines.

Sole traders and partnerships

Sole traders and partnerships made up only of individuals can claim the AIA. The 50% first-year allowance is for companies only. Above the AIA, an unincorporated business claims writing-down allowances: 14% a year on the main pool from 6 April 2026 for Income Tax, and 6% on the special-rate pool.

Leasing and finance

First-year allowances exclude plant bought to lease to someone else, with an exception for background plant in a building, so a leasing company generally cannot claim the 50% allowance on a battery it leases to you. Who claims the allowances under a lease, hire purchase or service contract depends on the contract, so settle the structure with your adviser before you sign. Our guide to financing commercial batteries sets out the main routes.

Business rates

In England, the Valuation for Rating (Plant and Machinery) (Amendment) Regulations 2022 (S.I. 2022/405) take “excepted renewables plant and machinery” out of valuation for days before 1 April 2035. The definition covers plant used for the generation, storage, transformation or transmission of power where the energy sources or technologies relied upon are mainly or exclusively one of a list that includes photovoltaics. It does not mention batteries by name, so whether a battery qualifies, particularly one charged from the grid, is a valuation question for your rating adviser.

Scotland and Wales have their own rules. In Scotland, SSI 2023/32 excludes from valuation plant on non-domestic property used to generate, store, transform or transmit power from wholly or mainly renewable sources, and it names storage batteries, from 1 April 2023 to 31 March 2035. In Wales, SI 2023/1229 excepts plant used for the generation or storage of power mainly or exclusively from listed renewable sources, from 1 April 2024 to before 1 April 2035. In Northern Ireland, generating plant up to 50kW is not rateable under the Rates (Microgeneration) Order (Northern Ireland) 2012 (Department of Finance practice notes), and how a battery is valued is a question for your rating adviser. In all three, as in England, a battery charged from the grid rather than from on-site renewables is the uncertain case. The Welsh position, and how it applies to a battery charged from on-site solar, is on our page on business rates on a battery in Wales.

What to put in your business case

1. Gross and net of VAT. Show both, and state whether the business can recover all of it.
2. Your tax rate. Corporation Tax is 25% on profits above £250,000 and 19% at £50,000 or below, with marginal relief between (GOV.UK). A £180,000 deduction saves £45,000 at 25% and £34,200 at 19%, and only if there are profits to set it against.
3. AIA headroom. Subtract other capital spend in the year, including by companies you control.
4. Classification above £1 million. Get the adviser’s written view and model both outcomes.
5. Structure. Cash, hire purchase, lease or service contract change who claims what.
6. Separate contract lines for groundworks, enclosure, plant and electrical connection.
7. A verification date. Rates and thresholds change; note when each was checked.

Tax relief speeds up payback but does not create it. A battery earns its return from what it does on your site, which is where peak shaving and energy arbitrage come in, and from the size you choose, which is covered in our guide to kW vs kWh.

Sources

• HMRC, VAT energy-saving materials manual, VENSAV3061: electrical storage batteries (updated 16 May 2024)
• GOV.UK, VAT rates and HMRC VAT guide, Notice 700
• GOV.UK, Annual Investment Allowance
• GOV.UK, 50% first-year allowances guidance
• GOV.UK, Writing down allowance rates and pools
• HMRC Capital Allowances Manual, CA23084: AIA and special-rate expenditure, CA22330: integral features, the assets and CA22320
• Capital Allowances Act 2001, section 104A and section 33A
• GOV.UK, Structures and Buildings Allowance
• GOV.UK, Corporation Tax rates
• National Renewable Energy Laboratory, Annual Technology Baseline 2024, commercial battery storage
• S.I. 2022/405, England business rates plant and machinery
• SSI 2023/32 (Scotland) and SI 2023/1229 (Wales), renewables plant excluded from rating valuation; Northern Ireland renewable energy valuation practice notes. Read 3 November 2026.

Related reading

• Is a commercial battery main-rate or special-rate plant?
• What is a BESS?