VAT and Capital Allowances on Restaurant Solar

The tax treatment of a commercial solar install is worth thousands — and widely misunderstood, mostly because domestic VAT headlines get applied to commercial projects where they don't belong. Here is the 2026 position, plainly.

VAT: the residential 0% headline is not for you

In Great Britain, installing solar panels and batteries carries 0% VAT in residential accommodation (and certain charitable buildings), a relief that applies until 31 March 2027 before reverting to 5%. Restaurants, pubs, cafés, and hotels are commercial premises, so commercial installs are standard-rated at 20%. That sounds like bad news until you remember how VAT works for a registered business: the 20% charged on your install is input tax, reclaimable in full on your next VAT return. The system costs what the ex-VAT price says it costs; the VAT is a few weeks of cash flow. The only operators for whom VAT is a true cost are the small minority below the registration threshold or on schemes that restrict recovery — if that is you, compare quotes VAT-inclusive.

One genuine edge case: premises with mixed use, such as a pub or restaurant with owner's accommodation above. Where a single installation serves both, apportionment rules may treat part of the supply differently. It needs documenting properly at quote stage — ask the installer how the split is shown and check the treatment with your accountant, rather than finding out at invoice.

The Annual Investment Allowance: the big one

Solar panels count as special-rate plant and machinery for capital allowances (special-rate assets otherwise attract a 6% writing-down allowance). The Annual Investment Allowance (AIA) limit of £1m also covers special-rate assets, so most small businesses get 100% relief in year one — a ceiling no restaurant solar project will trouble. The effect on project economics is direct. A £40,000 system bought by a company paying 25% corporation tax generates a £10,000 tax saving in year one, taking the effective net cost to £30,000 and cutting a 6-year payback towards 4.5. Sole traders and partnerships claim through income tax instead of corporation tax, so the saving runs at their marginal rate.

Companies that have already used their AIA elsewhere (rare at restaurant scale, possible in a fit-out year) can claim the 50% first-year allowance available to companies on special-rate plant, with the balance relieved through the 6% writing-down allowance — slower relief, same total. Full expensing, which covers main-rate plant, does not apply to solar. Solar-with-battery systems installed together as one project are normally treated as a package, though the split is worth confirming with your accountant. As ever, ask the installer for the cost breakdown your accountant needs; the accountant confirms the claim against your numbers.

SEG income and the expense side

Under the Smart Export Guarantee, licensed suppliers must offer an export tariff above 0p to eligible small generators, with the rate set by the supplier. Rates vary widely between suppliers — comparing SEG tariffs is worthwhile — but at a few pence per kWh, export is the garnish, not the meal. For tax purposes SEG receipts are ordinary trading income. On the expense side, ongoing costs are deductible as incurred: monitoring subscriptions, the once-or-twice-yearly panel cleaning that food premises need (kitchen extract grease is real), inverter replacement when it eventually comes, and insurance adjustments.

EPC value: the quiet tax-adjacent benefit

Not a tax item, but it belongs in the same financial conversation. Solar can improve a building's EPC rating, and the direction of regulation is towards higher standards: it has been unlawful since 1 April 2023 to let a non-domestic property rated below EPC E, and in its interim response of 18 June 2026 the government proposed that privately rented non-domestic buildings over 1,000 square metres reach EPC B by 2031, subject to secondary legislation and "where cost effective". Buildings under 1,000 square metres stay at the EPC E minimum with no new deadline. For tenants, that can make landlord consent conversations easier — your install can improve their asset's compliance position at your expense. For owner-operators, it protects the building's lettable and saleable value. Either way, the EPC uplift belongs on the benefits side of the board paper, next to the payback numbers.

Putting it together

For a typical VAT-registered limited company, the stack works like this: reclaim the VAT (cash-flow neutral), claim capital allowances (the £1m AIA usually means 100% relief in year one for a business under the limit, worth 19–25% of the project in tax), bank the energy savings (the engine of the deal), declare the modest SEG income, and hold the EPC improvement in reserve for the next lease event. None of it is exotic and all of it is standard practice — but quotes that ignore the tax position overstate payback by a year or more, and comparisons between installers only work on a like-for-like net basis. A proper quote shows gross cost, VAT treatment, and the AIA effect at both 19% and 25% rates, so your accountant can verify rather than reconstruct. If you would like to talk it through, send your venue's details through the enquiry form and we reply by email, or read the full FAQ set first.

TAX QUESTIONS

VAT and allowances — quick answers

Does the domestic 0% VAT rate apply to my restaurant?

No — and an installer suggesting otherwise deserves close questioning. The zero rate for installing solar panels and batteries in Great Britain runs until 31 March 2027, then reverts to 5%, and applies to installations in residential accommodation (and certain charitable buildings). Commercial premises pay standard-rate VAT at 20%. If you are VAT-registered (almost every restaurant above the threshold is), you reclaim it in full on your next return, so it is a cash-flow consideration rather than a cost.

How much is the AIA actually worth to me?

Solar panels count as special-rate plant, and the £1m Annual Investment Allowance also covers special-rate assets, so a business under the limit usually gets 100% relief in year one — a deduction from taxable profits in the year of purchase. On a £40,000 system, a limited company paying 25% corporation tax saves £10,000; at the 19% small profits rate, £7,600. A sole trader or partnership claims through income tax instead, so the value depends on your marginal rate.

What if my business makes a loss this year?

Capital allowances can create or increase a loss, which carries forward against future profits (or, for companies, can sometimes be carried back). You do not lose the relief — it just lands later. Worth a conversation with your accountant about timing: in some years claiming writing-down allowances instead of the full AIA produces a better multi-year result.

Is Smart Export Guarantee income taxable?

For a business, yes — SEG receipts are trading income like any other. They are usually modest at restaurant scale (systems of this size are normally sized to minimise export), but they belong in the accounts. The far larger benefit, avoided electricity purchases, simply shows up as a lower expense line.

Does solar affect my business rates?

Plant and machinery used for generating power can in principle affect rateable value, but in England on-site renewable generation plant and storage (solar and batteries) is exempt from business-rates valuation from 1 April 2022 to 31 March 2035. That applies to restaurant systems and larger hotel installations alike. The exemption is an English rule, so outside England check the position with the local rating authority, and confirm the treatment of your own building with a rating adviser.

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