Solar grants for business: what's actually available in 2026
An honest look at commercial solar grants — and why the tax allowances, the Smart Export Guarantee and asset finance usually beat chasing a grant.
Why most "business solar grant" searches end in disappointment
Plenty of pages promise grants and then quietly pivot to a finance or PPA pitch. The reality in 2026 is that there's no nationwide capital grant scheme for commercial rooftop solar. What exists is real but indirect, and for a profitable business it's usually worth far more than a one-off grant would be.
The support that genuinely moves the numbers
- Capital allowances (the big one). Solar is special-rate plant, so it qualifies for the Annual Investment Allowance at 100% on up to £1m, and the 50% first-year allowance above that. For a company at the 25% corporation-tax rate that's up to a quarter of the system cost back as tax relief — effectively a 25% discount funded by HMRC. Note it is special-rate, so it does not get 100% full expensing.
- Smart Export Guarantee. Licensed suppliers pay you for electricity you export — income that belongs to the system's owner.
- Growth Guarantee Scheme. The British Business Bank guarantees 70% of qualifying SME lending, helping lenders fund solar for businesses that a high-street bank might hesitate over.
- Regional & public-sector grants. Combined-authority decarbonisation rounds, Business Wales, Scottish low-carbon programmes, and Salix funding for the public sector come and go — sometimes covering part of a project alongside finance for the balance.
Our funding and allowances guide sets these out in full.
Grants plus finance: how they stack
Where a regional grant is open, it rarely covers the whole project — so the usual structure is grant + finance: the grant funds part, asset finance funds the rest, and the allowances reduce the net cost of the financed portion. One caution: a grant-funded system can carry clawback terms triggered by a later sale or refinance, so we check the conditions before structuring anything.
What we'd recommend instead of waiting for a grant
For most businesses the fastest route to a good outcome isn't a grant hunt — it's owning the system through finance so you capture the allowances and export income, with the repayment structured below the energy saving. We'll still check what regional grants are open for you, but we won't hold your project hostage to one. Model the numbers or ask us for a full comparison.
Related guides
Business solar grant FAQs
Can you get a government grant for solar panels for a business?
There is no single nationwide capital grant for commercial solar in 2026. Support is mostly indirect: 100% Annual Investment Allowance and the 50% first-year allowance on the cost, the Smart Export Guarantee for exported power, and the government-backed Growth Guarantee Scheme for lending. Direct cash grants tend to be regional (combined-authority decarbonisation rounds) or public-sector (Salix for schools, NHS and councils).
Can I claim solar panels as a business expense?
Not as a simple revenue expense, because solar is capital expenditure — but you claim it through capital allowances instead, which is usually more valuable. Solar is special-rate plant, so it qualifies for the Annual Investment Allowance at 100% on up to £1m, or the 50% first-year allowance above that. For a profitable company that can be worth up to a quarter of the system cost in year one.
Are solar panels worth it for a business?
For most commercial sites with significant daytime electricity use, yes. Typical simple payback is five to eight years, after which the system generates for another 15-plus years effectively for free, while cutting exposure to volatile grid prices. Financing the system usually makes it cash-flow positive from month one, so you don't have to choose between the saving and protecting working capital.
Is the ECO scheme or a free-solar offer available to businesses?
No. ECO4 and similar "free solar" schemes are for qualifying domestic households, not commercial premises. Any "free commercial solar" offer is almost always a Power Purchase Agreement, where a third party owns the system and you buy the power back — useful for some, but you give up the allowances and the export income. We compare that honestly against owning via finance.
What about grants for solar in Scotland, Wales or specific regions?
Devolved and regional support changes often. Business Wales, the Scottish Government's low-carbon programmes, and English combined authorities (Greater Manchester, West Midlands, Liverpool City Region and others) periodically run SME decarbonisation grant rounds, often covering part of a project with finance funding the rest. We check what is currently open for your area when we model your project.