Renewable Energy Finance for UK Businesses: Routes, Reliefs and Grants

What renewable energy finance means for a UK business

Renewable energy finance is the money a business uses to pay for equipment that generates, stores or uses low-carbon energy on its own site: solar PV, battery storage, EV chargepoints and heat pumps. For solar on its own, the solar panel finance hub compares the seven routes. For most UK firms it does not involve a special kind of lender. It means picking one of six ordinary funding structures, then making sure the tax reliefs and grants attached to each technology land with the right party.

• Cash. Buying outright from reserves has no finance cost and gives you the whole saving from day one, at the price of tying up working capital.
• Business or green loan. A term loan pays the installer and you own the equipment from the start; see business and green loans for solar.
• Hire purchase. A funder buys the equipment and you pay instalments, taking legal ownership at the end, but for capital allowances you are treated as the owner once it is in use. More on how hire purchase works.
• Finance lease. The funder keeps ownership and rents the equipment to you for most of its working life. Finance leases and hire purchase are the two main forms of asset finance, where the equipment itself is the main security.
• Operating lease. A rental in which the funder keeps the ownership risk and the equipment's value at the end of the term; see the operating lease guide.
• PPA or energy-as-a-service. A third party funds, owns and runs the equipment on your site and you pay for what it delivers: a price per kWh of electricity under a power purchase agreement, or a service charge for heat or charging.

The rule of thumb: if you own it (cash, a loan or hire purchase), you keep the savings and claim the capital allowances; if you don't own it (a lease or a PPA), the funder claims the allowances and takes its return from your payments, in exchange for asking little or no capital from you.

The tax rules follow ownership. Under hire purchase, section 67 of the Capital Allowances Act 2001 treats the business as the owner while it is entitled to the benefit of the contract, and treats the capital cost as incurred when the equipment is brought into use, so the relief does not wait for the last instalment. For leases, HMRC's guidance is that you cannot claim capital allowances on things you lease unless you have a hire purchase contract or a long funding lease. Under an ordinary finance lease the lessor claims the allowances and the lessee deducts the rentals as a revenue expense.

One distinction is worth making early. Renewable energy project finance usually means lending to a stand-alone generating project, such as a solar or wind farm held in its own company, repaid from the power it sells. On-site finance for a business is different: the funder relies on your accounts and on the asset, and the return shows up as lower energy bills rather than power sales. Where one provider funds, owns and runs several of these technologies for a single fee, the arrangement is usually sold as an energy-as-a-service contract.

Funding routes and reliefs for each technology

The same loan or lease can be worth more on one technology than another, because the tax classification and the grant position differ. The table sets out the position as checked in September 2026. The tax points are general, so confirm how they apply to your business with your accountant.

Two rules run across every row. First, the AIA covers special-rate as well as main-rate plant, and it is open to companies, sole traders and partnerships whose members are all individuals, so inside the £1m limit the 100% relief is available whichever pool an asset belongs to. Illustrative arithmetic: a company paying corporation tax at the 25% main rate that spends £60,000 on solar within its AIA deducts the full £60,000 from taxable profit, worth up to £15,000 in tax, provided it has enough profit to absorb the allowance. There is more detail on capital allowances for solar panels.

Second, a grant reduces what you can claim. Expenditure met directly or indirectly by a public body is treated as not incurred (Capital Allowances Act 2001, section 532). Illustrative: ten sockets costing £15,000 in total would attract £11,250 at 75%, but the cap is ten sockets at £500, so the Workplace Charging Scheme pays £5,000 and allowances are claimed on the £10,000 the business pays itself.

Green loans, sustainability-linked loans and green asset finance

Lenders use "green" in three different ways, and the differences matter when you compare offers. The formal definition, and how it differs from a sustainability-linked loan, is set out in what is a green loan.

Green loans: defined by what the money pays for

The Green Loan Principles published by the Loan Market Association (LMA), current version dated 26 March 2025, define a green loan by its use of proceeds. The money must be applied exclusively to eligible green projects, and the loan must follow four core components: use of proceeds, a process for evaluating and selecting projects, management of proceeds, and reporting. The indicative list of eligible categories includes renewable energy (including storage), energy efficiency and infrastructure for clean-energy vehicles. The principles are voluntary guidelines, so a bank's own small-business green loan sets its own eligibility list; the British Business Bank describes green loans to SMEs as typically restricted to activities such as investment in renewable energy, green buildings and pollution prevention.

Sustainability-linked loans: priced against targets

A sustainability-linked loan works the other way round. Under the Sustainability-Linked Loan Principles (also dated 26 March 2025), the use of proceeds does not define the loan, and in most instances the money is used for general corporate purposes. Instead, the loan's financial or structural terms vary with whether the borrower meets predetermined sustainability performance targets, measured through agreed key performance indicators. The most common version is a margin ratchet: the margin is often reduced when a target is met, and the reverse applies when it is missed. The principles recommend at least three years of track record on each indicator where feasible and require independent external verification of performance, so the structure is built around the whole business rather than one installation.

Green asset finance: hire purchase or leasing for energy equipment

Green asset finance is not a separate legal product. Whether the leasing half is worth it against owning the kit is worked through in leasing versus buying solar panels for a UK business. It is hire purchase or leasing used for energy equipment, sometimes through a funder's dedicated green programme, with the equipment as the main security; the British Business Bank gives leasing or hire purchase of solar panels as an example of asset finance for a sustainability project. Because the asset secures the deal, the funder will look closely at what it is and who installed it.

On price, any green discount is set by the individual lender and is not assured by the label. For the small-business version, with schemes, security and tax, see our guide to a green loan for small business. Rates change frequently, so compare offers on the total amount payable, and ask each lender whether its green product changes the rate, the term or the security it takes.

What lenders and funders check

Whichever structure you choose, a funder is underwriting two things: your business and the asset. Expect to be asked about the following.

• Trading history and accounts. Filed accounts, recent management accounts and bank statements show whether the business can carry the payments; the British Business Bank notes that profits and assets let lenders understand a business's ability to repay. Public schemes set hard thresholds: the Development Bank of Wales green business loan, for example, requires two years' trading and at least one set of filed accounts.
• Security. Under hire purchase and leases the funder owns the equipment until the end, which is its main security. A loan may need more, and the British Business Bank warns that some loans require security such as business or personal assets, so ask whether a director's guarantee is part of the offer.
• Certification and the installer. The asset's income and grants depend on certification, so a funder will check it. Smart Export Guarantee payments for solar up to 50kW need MCS certification or an equivalent, Boiler Upgrade Scheme vouchers are applied for by an installer certified under MCS, and Workplace Charging Scheme grants need an authorised installer. You can check an installer on the MCS register yourself.
• A generation estimate a funder can test. A quote should show expected annual output, how much will be used on site and the assumptions behind the savings. An estimate built on your own half-hourly consumption data is more credible than a rule of thumb.
• Grid connection. Under Engineering Recommendation G98, generation up to 16 A per phase (3.68 kW on a single-phase supply, 11.04 kW on three-phase) is fitted first, and the installer then notifies the distribution network operator (DNO) within 28 days of commissioning. The limit is the total for the premises and includes battery storage. Anything larger falls under G99: you apply to the DNO first, and construction starts once you have accepted its connection offer, so expect a funder to want that settled before it pays out.
• The building. If you rent, you will normally need the landlord's written consent, and the funder will compare the unexpired lease with the finance term. The roof's condition matters too, because lifting and refitting panels for a roof repair mid-term is a cost someone has to carry.
• Insurance. Expect to insure the equipment for its full value with the funder's interest noted, and check whether your existing business policy covers roof-mounted or ground-mounted generation.

When business finance counts as regulated consumer credit

Finance for a limited company or an LLP sits outside consumer-credit regulation, because both are bodies corporate and the regulated regime only covers credit to an individual or a "relevant recipient of credit": a partnership of two or three partners not all of whom are bodies corporate, or an unincorporated body that does not consist entirely of bodies corporate. A sole trader is an individual. For those borrowers, a credit agreement is exempt on business grounds only if the credit exceeds £25,000 and the agreement is entered into wholly or predominantly for business purposes; leases follow the same line, judged on whether the total payments exceed £25,000. Above that level, a signed declaration that the agreement is for business purposes creates a presumption that the exemption applies, unless the lender knows or has reasonable cause to suspect otherwise. Illustrative: a sole trader borrowing £20,000 for panels on a workshop roof is likely to be entering a regulated agreement.

That changes three things. The lender must be authorised by the FCA to enter into regulated credit agreements; the agreement must meet Consumer Credit Act requirements; and the borrower gets statutory rights, including a 14-day right to withdraw from the credit agreement without giving a reason and the right to settle early, in full or in part. A company borrower relies on the contract terms instead. This is a description of the rules, not advice on any agreement.

One agreement or several?

Many projects combine technologies: panels with a battery, or chargers fed by a solar array. One agreement means one credit application, one set of documents and one payment. Separate agreements let each term match each asset's life and keep the tax and grant paperwork clean, which matters because the reliefs differ: chargers can qualify for the 100% first-year allowance while panels are special-rate, and a Workplace Charging Scheme or Boiler Upgrade Scheme grant is tied to its own eligible equipment and installer. Whichever you choose, ask for an invoice that itemises each technology. There is a longer explanation of bundling solar, storage and EV charging into one agreement.

Grants for business renewables in 2026: open and closed

Grants change faster than finance products, so check a scheme's status before building a plan around it. As checked on 27 September 2026:

• Workplace Charging Scheme: open. Up to £500 per socket, capped at 75% of costs and 40 sockets across all sites, for businesses, charities and public-sector organisations. It closes on 31 March 2027.
• Depot Charging Scheme: for fleet depots. For organisations running battery-electric vans, HGVs or coaches, it part-funds depot charging at up to 70% of chargepoint and civil costs, capped at £1 million per organisation across all sites; check the current application window on Find a Grant.
• Boiler Upgrade Scheme: open. Homes and non-domestic buildings in England and Wales, within the 45kWth limit for an individual system. Regulations made in March 2026 extended the scheme's operation through to 2030; the £9,000 rate for replacing oil or LPG heating off the gas grid runs until March 2027.
• Public Sector Decarbonisation Scheme: closed. Phase 4 closed to applications on 25 November 2024. It was for public-sector organisations only, and no further phase has been announced.
• Industrial Energy Transformation Fund: closed. The government confirmed on 3 July 2025 that there would be no further extension and that the planned second Phase 3 competition window would not take place.
• Great British Energy: not a grant for private premises. Its rooftop solar funding has gone to schools, NHS sites and other public buildings, and its Local Power Plan is aimed at community energy groups, councils and other public-sector organisations. See who Great British Energy funds.
• Solar grants. A search of the government's Find a Grant service for "solar" returned no grants on 27 September 2026. The devolved nations run their own schemes, such as the Development Bank of Wales green business loan, which lists solar PV and offers discounted fixed rates.

For a private business, the tax reliefs in the table apply to every eligible installation, while grants are scheme-specific and time-limited. The full list, including what each devolved nation offers, is on the grants and funding hub.

Common mistakes when comparing offers

Two offers for the same system can show similar monthly payments and very different costs. Line them up on these points.

1. Term against asset life. Keep the finance term inside the equipment's working life and warranty, and inside the unexpired lease if you rent. A term that outlasts the asset leaves you paying for kit that needs replacing.
2. End-of-term payments. Ask what is due at the end: a balloon, an option-to-purchase fee, a secondary rental period, or removal by the funder. A large final payment lowers the monthly figure without lowering the cost.
3. VAT timing. Under hire purchase, VAT is normally charged on the cash price of the equipment at the start, with a separately disclosed credit charge exempt; under a lease, each rental carries VAT, and HMRC treats an agreement whose final optional payment equals or exceeds the anticipated market value as leasing. A VAT-registered business can normally reclaim the VAT unless it relates to exempt supplies, but the timing still affects cash flow.
4. Maintenance and performance. Find out who pays for servicing, monitoring, inverter or compressor replacement and repairs, and what remedy applies if the system underperforms against what was promised.
5. PPA pricing. Check whether the price per kWh is fixed, indexed or linked to grid prices, and what happens if your site uses less of the output than forecast.
6. Who can use the allowances. Ownership puts the capital allowances with you, but they only help if you have taxable profits to set them against; a business that could not use them gives up less by leasing.
7. Early termination. Get settlement or buy-out figures in writing, and find out what happens if you sell the business, move out or the landlord redevelops.
8. Insurance. Confirm who insures the equipment, for what value, and who pays the excess.
9. Balance sheet. Under FRS 102 as amended for accounting periods beginning on or after 1 January 2026, lessees recognise most leases on the balance sheet, so do not assume an operating lease keeps the asset off it.

Put the total amount payable, deposit, fees and any final payment next to the savings over the same period, rather than comparing monthly figures. For a loan, the cash-flow test on solar loans for small business does this with a worked table.

Next steps

Use the side-by-side comparison of every funding route to narrow the structure, then price it against your own building. If you request a costed quote, send us your numbers and we reply by email. The site is an independent publisher, not a lender, broker, installer or adviser, and this page is general information rather than financial or tax advice.

For the full checklist that lenders and funders work through before they approve a project, see what lenders check before financing business solar.