Solar grants for UK businesses — what's still open and how to use it.

The 2026 reality — what closed and what's still open

Three of the four major UK commercial solar grant schemes closed to new applications during 2024–26. Most online "solar grants for UK businesses" guides still describe them as live. They aren't:

• Industrial Energy Transformation Fund (IETF) Phase 3 — Closed after Spring 2024 round following the 2025 Spending Review. Existing awards delivering through 2028. Detail.
• Public Sector Decarbonisation Scheme (PSDS) Phase 4 — Closed November 2024. Existing awards delivering FY 2025-26 through 2027-28. Detail.
• UK Shared Prosperity Fund (UKSPF) — Closed 31 March 2026. Local Growth Fund partial replacement only in 11 Mayoral Authority areas. Detail.

What's still active for UK businesses in 2026 splits into three categories:

Tax allowances — guaranteed, no application

• Annual Investment Allowance (AIA) — 100% first-year capital allowance on the first £1m of plant per business per year, including solar. Worth ~25% of capex at the 25% corporation tax rate. Available to sole traders, partnerships and companies. No application. Claimed on the next CT or self-assessment return.
• Why Full Expensing does not apply to solar — all capital expenditure on the provision of solar panels is special rate expenditure (HMRC Capital Allowances Manual CA22335), and Full Expensing is a main-rate allowance. AIA is therefore the 100% year-one route; spend above the £1m AIA cap attracts the 50% special rate first-year allowance, with the balance written down at 6% a year in the special rate pool.
• 0% VAT on commercial solar — recently extended from domestic to commercial property installs. Approximately 17% reduction on VAT-inclusive cost. Applied at invoice by the installer.

Active competitive grants — by sector and geography

• Rural England Prosperity Fund (REPF) — up to 40% of capex for rural enterprise solar. Council-administered, varies by authority.
• Local Growth Fund — UKSPF successor, £1.5bn over 3 years, only 11 Mayoral Strategic Authority areas (North England + Midlands).
• Salix interest-free loans — public sector bodies only, repaid from energy savings.
• Great British Energy Community Fund — community-led projects (village halls, community centres, faith buildings, social clubs).
• Scottish IETF — Scottish manufacturers, food processors, chemicals, data centres only.
• Welsh Industrial Decarbonisation — Welsh manufacturers via Welsh Government routes.
• Invest NI Capital Grants — Northern Ireland businesses via DfE.

Recurring revenue and zero-capex structures

• Smart Export Guarantee (SEG) — pays for surplus solar exported to the grid. The best 2026 commercial flat tariffs now cluster at around 12p/kWh (Octopus Outgoing, EDF Export 12M Small Business, Scottish Power SmartGen+); banded and dynamic tariffs reach 25-40p/kWh at peak.
• Power Purchase Agreements (PPA) — zero capex, third-party-funded, fixed pence/kWh tariff 6-9p/kWh below grid prices.

How much UK businesses can actually save

Worked examples for the most common project types. All numbers are net of grant and tax relief, and reflect May 2026 UK pricing.

£180k SME manufacturing project (250 kWp)

No IETF (closed). AIA covers 25% via tax saving. 0% VAT applied at install. SEG export at 13p/kWh average. Effective net capex around £130k. Annual savings £42,000. Payback 3.1 years.

£400k mid-sized factory project (500 kWp)

No IETF. AIA covers 25%. 0% VAT applied. SEG. Effective net capex around £300k. Annual savings £85,000. Payback 3.5 years.

£115k farm project (150 kWp)

REPF at 35% of eligible capex (council-dependent). AIA on net of grant. Effective net capex around £56k. Annual savings £24,000. Payback 2.3 years. See live example.

£885k NHS trust project (350 kWp PV + heat pump)

PSDS Phase 4 award (already approved, closed to new). Trust contribution £0 capex. £108k annual savings. Effective payback instant. See live example.

£500k logistics warehouse (1MWp PPA)

Zero capex. PPA tariff 5.9p/kWh against grid imports at 22.3p. Annual savings £68,000. Effective payback to operator: 5.1 years (against implied capex). See live example.

Sector-specific routes

Each sector has its own funding stack in 2026. Click your sector for the detailed page:

• Manufacturing — AIA + PPA + SEG (English IETF closed; Scottish IETF if Scottish)
• Farms & agriculture — REPF + AIA + SEG (REPF still active)
• Schools, academies, FE — Salix BAU loans + LCSF + Local Growth Fund (PSDS closed)
• NHS & healthcare — Salix BAU loans + LCSF + PPAs (PSDS closed)
• Hotels & hospitality — AIA + PPA (no direct grants)
• Warehouses & logistics — PPA dominant + AIA
• Retail parks & stores — AIA + PPA + solar canopies
• Offices & business parks — AIA + BREEAM credit value

Application strategy — what assessors actually score on

For competitive grants (REPF, Local Growth Fund), three things distinguish winning from losing applications:

1. Productivity narrative beats decarbonisation narrative for REPF. Council economic development teams score on rural growth — jobs, GVA, contract revenue. A pure carbon pitch sits in the queue with every other generic application.
2. Local economic outcomes win Local Growth Fund. Each Mayoral Authority Investment Plan has 3-4 themes. Aligning with the authority's specific cluster strategy (Aire Valley logistics in WYCA, Atom Valley in GMCA, AMRC in SYMCA) materially improves scoring.
3. Bundled measures beat solar-only on every public-sector route. PSDS scoring (when it was active) and any future Phase 5 reward integrated retrofit. Solar alone typically scores 4.0-5.5 tCO2e/£100k of grant; solar + heat pump + fabric scores 7.0-9.0 — the difference between losing and winning.

What we do for clients

The free funding review takes 4 minutes. We come back within one working day with a written shortlist of routes you would credibly use, indicative system sizing and ballpark capex with payback after support. About a third of clients we scope are advised against proceeding because the project doesn't pay back — we say so before any application work starts. Full process.

Government grants for solar panels for business — grant vs tax relief vs export

The phrase "government grants for solar panels for business" hides three very different things, and conflating them is the single most common mistake we see. Being precise about which is which is how you avoid chasing money that isn't there:

• True cash grants — money you don't repay. In 2026 these are targeted, not universal: REPF (rural, up to 40%), the Local Growth Fund (11 Mayoral areas), GB Energy Community Fund, Scottish IETF, Welsh and NI routes. There is no open national cash grant for an ordinary English commercial solar install.
• Tax relief — the Annual Investment Allowance (~25% effective) and 0% VAT. Available to almost every UK business, automatic, and the real backbone of the 2026 stack. Often mistaken for a "grant" but it reduces your tax bill rather than paying cash up front.
• Export revenue — the Smart Export Guarantee pays you per kWh exported. Not a grant at all, but recurring income that runs for the life of the system and stacks on top of everything else.

Can you combine solar grants? Within limits. The UK Subsidy Control Act 2022 generally prevents stacking two government grants on the same plant. But tax allowances apply to the net-of-grant cost and can always sit alongside a grant, and SEG export revenue always stacks. So the realistic best case is one cash grant (where you qualify) + AIA + 0% VAT + SEG — which is exactly how a project nets 40-60% effective support.

Solar grants for business by region and nation

Funding differs sharply across the four UK nations and by English region. Here is the honest 2026 directory — what each devolved administration and Mayoral area actually offers.

England

• National (all regions): AIA, 0% VAT and SEG apply everywhere. REPF (up to 40%) for rural enterprises is council-administered, so availability varies by district.
• North England + Midlands (Mayoral areas): the Local Growth Fund operates in 11 Mayoral Strategic Authority areas (e.g. Greater Manchester, West Yorkshire, South Yorkshire, Liverpool City Region, West Midlands, North East). Grants are set by each authority investment plan.
• Local council schemes: individual councils periodically run SME energy-efficiency grants. These open and close quickly — we monitor live availability per client postcode.

Scotland

• Scottish IETF (SIETF): capital grants for Scottish manufacturers, food processors, chemicals and data centres.
• Business Energy Scotland SME loan: interest-free loans (up to £100k) plus cashback for qualifying SME energy measures including solar.

Wales

• Welsh Industrial Decarbonisation support for Welsh manufacturers via Welsh Government routes.
• Development Bank of Wales Green Business Loan: concessionary-rate finance for Welsh SMEs investing in renewables.

Northern Ireland

• Invest NI Capital Grants: capital support for eligible Northern Ireland businesses, administered via the Department for the Economy.

How to apply for a solar grant for your business

There is no single application — each route has its own mechanics. Here is the order we work them for clients:

1. Claim the automatic tax allowances. AIA needs no application — it is claimed on your corporation tax or self-assessment return. 0% VAT is applied by the installer at invoice. Because solar is special rate expenditure, AIA is the 100% year-one route, and any spend above the £1m AIA cap attracts the 50% special rate first-year allowance with the balance in the 6% pool. This is the guaranteed base of the stack for every UK business.
2. Apply for REPF if you are a rural business. The Rural England Prosperity Fund (up to 40%) is administered by local councils. Apply through your council economic-development team and lead with the rural productivity and jobs narrative, not carbon alone — that is what assessors score.
3. Apply to the Local Growth Fund if you are in a Mayoral area. Submit via the relevant Mayoral Authority investment plan and align the bid with its specific cluster strategy.
4. Use Salix or the devolved routes. Public sector bodies apply for Salix interest-free loans. Scottish businesses use SIETF or the Business Energy Scotland SME loan; Welsh businesses the Development Bank of Wales; NI businesses Invest NI.
5. Sign up to the Smart Export Guarantee. Once the MCS-certified system (under 5MW) is commissioned with half-hourly export metering, switch your export contract to a high-paying SEG supplier for recurring export revenue.