Commercial Property Solar Grants & Funding 2026

Funding solar panels for commercial property in 2026

The most common reason a commercial solar project stalls is not doubt about whether the roof works, it is the assumption that the building’s owner has to find six figures of capital before anything happens. For solar panels for commercial property, that assumption is usually wrong. In 2026 there are several well-worn routes that mean most owners pay little or nothing up front, and the right one depends heavily on whether you occupy the building yourself or let it to tenants. This guide walks through each route and, just as importantly, where each one sits in the landlord-versus-tenant question that defines commercial property.

A quick word on scope. There is no single national grant that simply pays for commercial solar in the UK. What exists instead is a genuinely valuable tax allowance, financing structures that remove the capex barrier, regional grant rounds that come and go, and an export payment. Used together they make the economics work without a cash purchase. The figures below are illustrative and depend on your profit, entity type, region and lease.

The foundation: 100% Annual Investment Allowance

For any commercial property owned by a profitable business, the starting point is the 100% Annual Investment Allowance (AIA). With solar classed as plant and machinery, the entire capital cost comes off taxable profit in the year you buy, subject to a £1m annual cap that almost every commercial install falls well below.

The illustrative effect for a limited company is a saving worth roughly a quarter of the project value against current corporation tax rates. On an £80,000 array that is in the region of £20,000 of relief, taking the effective net cost to about £60,000. For a landlord, the key point is that the allowance applies to the plant the owner buys and holds, so it is the owner who claims it. Sole traders and partnerships on the cash basis can access similar reliefs. Because the exact benefit turns on your profit and structure, our finance team works alongside your accountant to confirm the route, and the official detail sits in HMRC’s guidance on capital allowances. The full picture is on our grants and funding page.

A caveat for landlords on let property

The allowance is powerful but it does not, on its own, solve the split-incentive problem on let buildings. If the landlord buys the panels and claims the AIA but the tenant pays the bill, the tax relief sits with the owner while the energy saving sits with the occupier. That is fine if the lease shares the benefit and awkward if it does not. We cover the structures that fix this under leases below, because getting the lease right is what turns a good tax position into a good investment.

Removing the capex barrier: asset finance and PPAs

If the building owner would rather not commit capital at all, two structures dominate.

Asset finance spreads the cost over five to seven years. Because a well-sized commercial array typically saves more on the bill than the monthly finance payment costs, the project is usually cash-flow positive from month one, and the owner holds the asset outright at the end of the term. For an owner-occupier this is often the cleanest route: you replace a grid bill with a slightly smaller finance payment, keep the difference, and own a generating asset at the end.

A power purchase agreement (PPA) removes the capital question entirely. A funder owns and maintains the array on your roof and you buy its output below your grid price, so there is zero capex and savings begin from day one. The trade-off is that the funder captures the tax allowance and the long-term value, and on a let building a PPA must be structured so it can transfer with a sale. For a landlord who wants the EPC and MEES benefit without funding the kit, it can be the pragmatic answer.

Choosing between them is a per-building decision. Cash purchase plus AIA gives the best lifetime return for a profitable owner-occupier; asset finance gives most of that return with none of the upfront cost; a PPA gives the compliance and lettability benefits with no capital, at the cost of the long-term upside. We model the relevant routes for every commercial quote rather than pushing one.

Regional grants and government-backed lending

On top of the tax and finance routes, two further sources of money are worth checking.

Mayoral and combined authority grants. Several combined authorities, including Greater Manchester, the West Midlands, West Yorkshire and Liverpool City Region, have run SME decarbonisation grant rounds worth an illustrative £5,000 to £50,000 per business. These schemes open and close, so the right move is to check what is actually live in your region rather than rely on a scheme that may have closed. We confirm current availability for your location as part of the feasibility work.

Government-backed lending. The British Business Bank’s Recovery Loan and Growth Guarantee schemes can fund renewables from around £25,000 upwards, with a government-backed guarantee on a large share of the loan. These are useful where a business’s own bank is reluctant to lend, because the guarantee reduces the lender’s risk.

Export income through the Smart Export Guarantee

The Smart Export Guarantee (SEG) is not a grant, but it is real income. Any generation the building does not use is exported and paid for at rates in the 4 to 15p per kWh range as of 2026, provided the install is MCS certified. This matters most for the buildings that export the most, offices and retail premises that empty at weekends and export 25 to 45% of what they generate. The value is modest next to self-consumed power, but folding it into the funding model improves the return on exactly the buildings whose paybacks are otherwise the longest.

Leases: the funding question that is unique to commercial property

None of the funding routes above work cleanly on a let building unless the lease accounts for the panels, which is why leasing sits at the heart of commercial property solar funding in a way it never does for an owner-occupier.

The split-incentive problem is straightforward to state. The landlord owns the building and would fund the array, but the tenant pays the energy bill, so without intervention the costs and benefits land on different parties. The established fixes are equally well understood. On a single-let building, a green-lease addendum can set out who funds the system and how the saving is shared, often pairing a modest service-charge contribution with the tenant’s lower energy bill. On a multi-let or mixed-use building the metering is more complex, multiple tenants each with their own supply, so the route is usually an allocation model such as a sleeve PPA or virtual net metering, with cost recovery handled through the service charge under the RICS Code on Service Charges 2018.

The reward for getting this right is significant. A landlord who structures the lease properly captures a share of the energy saving, lifts the EPC band, secures MEES compliance ahead of the band C deadline in 2027 and band B in 2030, and protects the asset’s lettability and value, all from a project that may have cost no capital. For the multi-tenant case, our mixed-use commercial page sets out how allocation and service-charge recovery work in practice.

Putting a funding plan together

For most commercial buildings the funding plan writes itself once two questions are answered: do you occupy or let the building, and do you want to spend capital. A profitable owner-occupier with cash gets the best return by buying and claiming the AIA. One who would rather preserve cash uses asset finance and stays cash-flow positive from the start. A landlord who wants the EPC and MEES benefit without funding the kit looks at a PPA, with the lease structured to share the value. Any live regional grant, government-backed lending and SEG export income then layer on top.

Because the right answer depends on your building, profit position and lease, every credible funding plan should be modelled from your own numbers. To weigh the options, try the savings calculator, review the cost guide for the underlying project values, and then request a free feasibility and we will model the funding routes that fit your building and your accounts.