A commercial solar lease lets UK businesses use a solar PV system with no upfront capital. The lessor owns the panels; you pay a fixed monthly rental and keep the electricity savings. This guide explains both lease types, typical costs, the tax and accounting treatment, and when leasing makes sense.
A commercial solar lease is a long-term rental agreement for a solar PV system installed on your business premises. The lessor (a specialist leasing company, bank, or structured finance vehicle) installs and owns the panels; you pay a fixed periodic rental — typically monthly or quarterly — and receive the benefit of the electricity generated.
Solar leasing removes the upfront capital requirement (typically £40,000–£200,000 for a commercial system) and transfers ownership, maintenance obligations, and residual value risk to the lessor. In return, you pay a finance cost embedded in the rental: this makes leasing more expensive over a 25-year horizon than outright purchase, but often cash-flow positive from month one.
Operating lease vs finance lease for commercial solar
The two main lease structures have different accounting, tax, and ownership consequences:
Operating lease
Under an operating lease, the lessor retains substantially all risks and rewards of ownership. The asset stays on the lessor's balance sheet; for UK GAAP (FRS 102) companies the lease is an off-balance-sheet operating expense. The lessor claims the 50% First Year Allowance, which reduces their tax cost and flows through to lower rentals. Operating leases typically run 10–20 years.
The key advantage is clean accounting: no new asset or liability appears on your balance sheet, your debt covenants are unaffected, and rental payments are simply an operating cost. The key disadvantage is that you do not own the panels at the end of the term (unless a purchase option is exercised) and you cannot claim the FYA yourself.
Finance lease
Under a finance lease, you as lessee bear substantially all risks and rewards of ownership. IFRS 16 requires the asset and lease liability to be capitalised on your balance sheet (UK GAAP FRS 102 gives more flexibility for smaller companies). You claim the capital allowances as though you owned the asset. Finance leases are shorter (5–12 years) and end with a nominal-cost purchase option or secondary period. They are closer economically to hire purchase than a true lease.
Feature
Operating lease
Finance lease
Capital purchase (loan)
Upfront cost
None
None or small deposit
None (loan) or full amount (cash)
Balance sheet
Off (UK GAAP)
On (IFRS 16 / FRS 102)
On (asset + debt)
Who claims FYA
Lessor
Lessee
Buyer
Panel ownership
Lessor throughout
Lessor; lessee bears risk
You
Typical term
10–20 years
5–12 years
7–15 years
25-yr after-tax IRR
Lower (rental cost)
Medium
Highest (ownership)
How much does a commercial solar lease cost?
Monthly rental is a function of installed system cost, implicit interest rate, and lease term. Typical rental ranges for UK commercial systems in 2026:
25kWp (small roof): £350–£550/month over 15 years
50kWp (mid-size commercial): £700–£1,100/month over 15 years
100kWp (large roof or car park): £1,200–£1,900/month over 15 years
250kWp+ (large industrial): bespoke; typically <£30/kWp/year in rental
The implicit rate on a commercial solar operating lease is typically 5–8% p.a., reflecting the lessor's cost of funding, credit risk premium, and operating costs. Rates are fixed for the lease term, giving a predictable cost base.
Worked example: 50kWp roof-mount, 15-year operating lease
Installed system cost£48,500
Lease term15 years
Implicit rate6.5% p.a.
Monthly rental~£845/month
Annual generation45,000 kWh
Annual energy saving~£12,600
Net annual benefit~£2,460/yr
Balance sheet impactNil (UK GAAP)
Figures indicative. Actual rental depends on credit profile, installer, and market rates at lease inception. See our finance calculator for a model based on your numbers.
Tax and accounting treatment
The accounting and tax implications differ significantly between lease types and applicable accounting standards:
Operating lease / UK GAAP (FRS 102): rentals are an operating expense; no asset or liability on balance sheet; lessor claims FYA or AIA
Operating lease / IFRS (listed companies): IFRS 16 requires capitalisation as right-of-use asset + lease liability, even for operating leases; depreciation and interest replace the rental expense
Finance lease: lessee capitalises under both IFRS and UK GAAP; lessee claims capital allowances (AIA or writing-down allowance); implicit interest deductible
For most private businesses on UK GAAP, an operating lease remains genuinely off-balance-sheet. Always confirm the accounting treatment with your auditor before signing.
Frequently asked questions
What is a commercial solar lease?
A commercial solar lease is a long-term agreement under which a lessor owns and installs a solar PV system on your business premises and you pay a fixed periodic rental — typically monthly or quarterly — for its use. You receive the benefit of the electricity generated (or a discounted electricity rate under a PPA variant) without needing to purchase the system outright. Leases typically run 10–20 years.
What is the difference between an operating lease and a finance lease for solar?
Under an operating lease the lessor retains ownership and residual value risk throughout: the asset stays on the lessor's balance sheet, the lessor claims the 50% First Year Allowance, and your rentals are treated as an operating expense. Under a finance lease, IFRS 16 requires you to capitalise the asset and liability on your own balance sheet, and you bear residual value risk at the end of the term. For most businesses seeking off-balance-sheet solar finance, an operating lease is the appropriate structure.
How much does a commercial solar lease cost per month?
Monthly lease costs depend on system size, term, and implicit interest rate. As a guide: a 50kWp roof-mount system (installed cost ~£45,000–£55,000) typically generates monthly rentals of £700–£1,100 over a 15-year operating lease. A 100kWp system (installed cost ~£80,000–£95,000) typically generates rentals of £1,200–£1,900 per month. The rental is fixed, so your energy cost is predictable over the full term.
Is a commercial solar panel lease off-balance-sheet?
A true operating lease can achieve off-balance-sheet treatment, but only if structured to meet the criteria: the lessor retains substantially all ownership risk and reward, the lease term does not cover substantially all of the asset's useful life, and the present value of rentals does not represent substantially all of the asset's fair value. From 2019, IFRS 16 eliminated operating lease off-balance-sheet treatment for most listed companies — private companies using UK GAAP (FRS 102) retain more flexibility.
Can I buy the solar panels at the end of a commercial lease?
Some operating lease agreements include a purchase option at the end of the term, typically at fair market value (to preserve operating lease accounting). A finance lease usually gives the lessee the right to acquire the asset for a nominal sum at the end (effectively hire purchase). If your objective is eventual ownership, a finance lease, hire purchase, or green loan may be more appropriate than a pure operating lease.
Is solar leasing better than buying solar panels outright for my business?
Buying (capital purchase with green loan or own cash) typically delivers the strongest 25-year IRR because you own the asset, claim the First Year Allowance, and eliminate the implicit leasing cost. However, leasing is better when: (1) capital preservation is the priority; (2) you cannot use the FYA (loss-making or non-taxpaying entities); (3) your balance sheet cannot absorb debt; or (4) you require a guaranteed, fixed energy cost with no maintenance liability.
How long is a commercial solar panel lease?
Commercial solar leases typically run 10–20 years, with 15 years the most common operating lease term in the UK market. Finance leases are often shorter (5–12 years) because the lessee carries the balance-sheet obligation. Some PPA agreements extend to 25 years to match the typical panel warranty period. Longer terms reduce monthly rentals but increase total cost of finance over the period.
What happens if I want to end a commercial solar lease early?
Most commercial solar leases include an early termination clause that requires the lessee to pay a break fee — typically the net present value of the remaining rentals, discounted at the lease's implicit rate. This can represent a significant sum mid-term. Early termination should be assessed before signing: negotiate a step-down schedule, a break-clause at year 5 or 10, or a lease transfer option if the property is likely to be sold.
How much does project finance cost for commercial solar leasing?
For larger commercial solar projects (typically 250kWp and above), 'project finance' refers to a structured debt arrangement where the loan or lease is secured against the project's future cash flows rather than the borrower's balance sheet. In 2026, the all-in cost of project finance for UK commercial solar leasing typically comprises three elements: the interest margin, the arrangement fee, and ongoing monitoring/admin charges.
Project finance cost element
Typical range (2026)
What drives it
Interest margin (over SONIA)
1.8%–3.5%
Credit quality, system size, lease term, SPV structure
Insurance review, meter data access, compliance reporting
Insurance requirement
0.2%–0.5% of replacement value/yr
All-risks during operation; lender-specified minimum cover
Debt service cover ratio (DSCR)
1.20:1 minimum (most lenders)
Lower DSCR = higher yield required = more expensive finance
Effective all-in cost (total)
5.5%–9.5% APR equivalent
Combined SONIA floor + margin + fees amortised over term
For smaller commercial solar leases (50–250kWp), the term 'project finance' is used more loosely to mean any finance arrangement structured around the solar system as the primary asset. In this range, hire purchase and operating lease are more common than true project finance, with effective APRs typically in the 6.0%–11.5% range depending on credit profile and system specification.
Project finance vs hire purchase: key differences
True project finance for commercial solar uses a Special Purpose Vehicle (SPV) to isolate project risk — the lender's recourse is limited to the SPV's assets and cash flows. This structure suits projects above £500k. For smaller commercial solar installations, hire purchase gives the buyer AIA in year one (up to 100% first-year write-off) and legal ownership at the end of term, which is simpler and cheaper to arrange. Project finance works best when the borrower wants to keep the system off their main balance sheet or when the project is too large for standard SME lending criteria.
Commercial solar lease rates in the UK: lender comparison 2026
The commercial solar lease market in the UK in 2026 is served by a mix of specialist renewables lenders, high-street bank green loan divisions, and independent finance brokers. Monthly lease costs depend on system size, credit profile, and lease term. The table below shows indicative monthly costs for a 100kWp system (installed cost £85,000–£95,000) across the main route types.
Finance route
Typical monthly cost (100kWp)
Term
Ownership at end
Capital allowances
Finance lease
£900–£1,300/month
5–10 years
Option to buy at residual
Lessor claims; lessee deducts rentals
Operating lease
£750–£1,100/month
5–10 years
No — asset returned
Lessor claims; lessee deducts rentals
Hire purchase
£1,000–£1,500/month
3–7 years
Yes — automatic
Buyer claims AIA year one
Green loan
£950–£1,400/month
5–10 years
Yes — from day one
Borrower claims AIA year one
PPA
£0/month + per-kWh rate
15–25 years
No — developer owned
Developer claims
Monthly cost assumptions: 100kWp system, £90,000 installed cost, 6.5%–11.0% effective rate, first year energy saving £18,000–£22,000. Actual costs vary significantly by lender and credit profile. Use the calculator above for a site-specific estimate.
Finance lease vs operating lease: the commercial solar decision
Factor
Finance lease
Operating lease
Balance sheet treatment
On B/S (IFRS 16 right-of-use asset)
Off B/S (under IFRS 16 for leases <12 months or low-value; otherwise on B/S)
Capital allowances
Lessor claims; lessee deducts lease rentals
Lessor claims; lessee deducts lease rentals
End-of-term option
Purchase at residual value (often £1)
Return asset; extend; or replace
Credit requirements
Stronger — treated as secured lending
More flexible — lessor retains ownership
Typical minimum system size
25kWp
25kWp
Best for
Businesses wanting ownership at end
Short-tenure businesses; public sector supplement to PSDS
VAT treatment
Output VAT on rental installments
Output VAT on rental installments
TUPE considerations on sale
System becomes part of business assets
System remains lessor asset — no TUPE implications
How to choose between finance lease and operating lease
The key question is tenure and exit intention. If you own the freehold or have a long lease (>15 years remaining) and want to own the system outright at the end, a finance lease with a £1 purchase option is usually better — lower total cost of ownership despite similar monthly payments. If you have a shorter lease, are unsure about long-term ownership, or need to keep the system truly off balance sheet (note: IFRS 16 has narrowed this distinction), an operating lease gives more flexibility. Ask the lender for a full-term cost comparison before committing.
Frequently asked questions: commercial solar lease costs
How much does a commercial solar lease cost per month?
For a typical 100kWp system (£85,000–£95,000 installed), monthly lease payments typically range from £750–£1,300/month depending on the lease type, term, and lender. A 250kWp system (£200,000–£250,000) typically costs £1,800–£3,200/month on a 7-year finance lease. In most cases, the annual energy saving (£18,000–£55,000/year at 35p/kWh) significantly exceeds the annual lease cost within years 1–3 of operation, making the lease cash-positive from early on.
What credit score do I need for a commercial solar lease?
Most UK commercial solar lease providers require at least 2 years of filed accounts (Companies House), no CCJs in the last 3 years, and a Dun & Bradstreet or Experian business credit score of at least 45/100 (moderate-good range). Smaller systems (under £50,000) can often be approved via a simplified credit process in 24–48 hours. Larger systems (>£200,000) typically require 3 years of audited accounts, personal guarantees from directors, and a 3–4 week underwriting process.
Can I lease solar panels for a property I rent?
Yes — but you need landlord consent in writing before signing any lease. Some lenders specialise in landlord–tenant solar leases where the landlord benefits from an increased property yield. The lease agreement should specify who owns the system during and after the term, who benefits from the SEG export payments, and what happens if the business moves out. For short remaining tenures (<5 years), a PPA (where the developer owns and maintains the system) is usually a better fit than a standard commercial lease.
Model your solar lease versus buying outright
We compare operating lease, finance lease, green loan, and capital purchase against your actual energy costs and tax rate. Independent — no lender commission.