Solar Lease vs Buy vs Loan: Which Is Cheapest in 2026?
Paying cash for solar is still usually the cheapest over 25 years because you pay no interest and keep the home-value bump. But the 30% homeowner tax credit ended for installs after December 31, 2025, while leasing companies may still claim a commercial credit, so in 2026 the gap has narrowed sharply. A loan now often costs about as much as a fairly priced lease over 25 years. This guide breaks down all three with real numbers, the traps to avoid, and who each option suits.
The three ways to pay for solar
Every solar quote, no matter how it is dressed up, comes down to one of three payment methods. On the exact same panels on your roof, the difference between them over 25 years can be tens of thousands of dollars:
- Cash purchase — you pay the full price upfront and own everything outright.
- Solar loan — you finance the system, still own it, and repay over 5–25 years.
- Lease or PPA — a company owns the panels on your roof; you pay a fixed monthly fee (lease) or buy the power they produce at a set per-kWh rate (PPA).
The single most important difference is ownership, because ownership decides who keeps any state incentives and who captures the home-value increase. Until the end of 2025 it also decided who collected the 30% federal tax credit (worth ~$6,300 on a typical system). That homeowner credit ended for installs after December 31, 2025, while the commercial credit a leasing company may claim did not — which changes the comparison, as we explain below.
Lifetime cost comparison
Here is how the three options typically compare on a $21,000, 7 kW system over 25 years:
| Method | Upfront | Own system? | Federal credit in 2026? | ~25-yr net cost |
|---|---|---|---|---|
| Cash | $21,000 | Yes | No (25D ended) | ~$21,000 |
| Loan (7.5%, 15 yr) | $0–low | Yes | No (25D ended) | ~$35,000 |
| Lease/PPA | $0 | No | Owner may claim 48E | ~$30,000–$40,000+ |
Cash still wins because you avoid all interest. A loan now costs noticeably more, because there is no 30% credit refund to knock down the balance in year one and you pay interest on the full price. The lease's $0-down appeal is still offset by two decades of escalating payments, but a lease priced with the commercial 48E credit passed through and a low escalator can now come in below a 7.5% loan. Model your own numbers with the Solar Financing Calculator, which stacks all four payment paths side by side.
Option 1: Paying cash
Cash is the simplest and cheapest path if you have the funds. You pay the full price and own a 25-year asset free and clear. For a 2026 install there is no 30% federal credit to claim, so the price you pay is the net cost; check your state for any remaining rebates or tax credits. There are no payments, no interest, and no contracts.
The trade-off is liquidity: you tie up $18,000–$30,000 that could be invested elsewhere. The right way to judge this is opportunity cost — compare solar's effective 4–7% tax-free, inflation-protected return (lower than the 6–9% it delivered with the credit) (see our lifespan & ROI guide) against what that cash would earn after tax in a savings account or the market. For many homeowners, the guaranteed, bill-reducing return of cash-bought solar is an attractive use of idle savings.
Option 2: The solar loan
A solar loan lets you go solar with little or no money down while still owning the system — so you keep state incentives and the home-value bump. Until 2025, borrowers financed 100% of the price and then applied the 30% credit refund as a lump-sum prepayment. That credit ended for installs after December 31, 2025, so a 2026 loan carries the full balance for its whole term. Watch for loans still structured around an expected year-one prepayment: if the payment jumps when no lump sum arrives, the deal was built for a credit you won't get.
Loan terms run 5 to 25 years; longer terms mean lower payments but more total interest. A 15-year term is a common balance. The key question is whether your monthly solar savings cover the payment — without the credit, that usually takes a longer term or a lower system price. Use the Solar Loan Calculator to see your payment, total interest, and how it compares to your current electric bill.
Option 3: Lease and PPA
A lease or power purchase agreement (PPA) puts panels on your roof for $0 down. With a lease you pay a fixed monthly fee to use the system; with a PPA you buy the power it produces at a set per-kWh rate. Both usually include an annual escalator of 2.5–3.5%, so your payment climbs every year for 20–25 years.
The catch is that the third-party company owns the system, so they collect any state incentives — not you. Combined with escalating payments, this is why leases have usually cost the most over the system's life. In 2026 the picture is less one-sided: the owner may still claim the commercial 48E credit that homeowners lost, and some providers pass part of it back to you. They also complicate selling your home, as we cover below.
Lease vs buy in 2026: why the math flipped
For most of the last decade, the strongest argument against leasing was simple: the company kept the 30% federal tax credit, and you didn't. Buying gave you that 30% back, so owning won by a wide margin. The One Big Beautiful Bill Act, signed July 4, 2025, changed that in a lopsided way.
- Homeowners lost their credit. The 30% Residential Clean Energy Credit (25D) does not apply to any system whose installation was completed after December 31, 2025. A cash buyer or borrower in 2026 pays the full price.
- Leasing companies may keep theirs. A company that owns the system on your roof can still claim the commercial clean-electricity credit (48E) if construction begins by July 4, 2026 or the system is placed in service by December 31, 2027. Foreign-entity-of-concern (FEOC) sourcing rules apply, so not every system qualifies.
- Some of that saving can reach you. Providers that claim 48E may pass part of it through as a lower monthly lease payment or a lower PPA rate.
Put the numbers side by side on our $21,000 example. Buying with cash used to net about $14,700; now it is $21,000. A 15-year loan at 7.5% used to land around $21,700 once the credit refund was used to pay it down; with no refund it is about $35,000. The lease side hasn't gotten worse, and if the provider passes a credit through, it may have gotten better.
| Path | 2025 install (30% credit) | 2026 install |
|---|---|---|
| Cash | ~$14,700 | ~$21,000 |
| Loan (7.5%, 15 yr) | ~$21,700 | ~$35,000 |
| Lease/PPA (2.9% escalator) | $40,000+ | ~$30,000–$40,000+, depending on 48E pass-through |
The result: cash is still usually cheapest, but a loan is no longer an easy second place. If you would have to borrow at 7% or more, a lease or PPA with a low escalator (2% or less, or none) and a credit passed through may cost about the same or less over 25 years, with no maintenance on you. Ownership still has real advantages — the home-value bump, no escalator, and full control when you sell — but in 2026 you should always get a lease or PPA quote alongside a purchase quote.
Who should actually lease?
Leases get a bad reputation, but they genuinely suit a narrow group:
- Homeowners who would otherwise borrow at a high rate, now that the 30% homeowner credit is gone for 2026 installs, and who can find a lease priced with the commercial 48E credit passed through and a low escalator.
- People who cannot or will not finance a purchase and want strictly zero upfront cost.
- Those who place a high value on zero maintenance responsibility and are willing to pay for it in lifetime savings.
For many others, owning — especially with cash — is still the winner, but in 2026 it pays to get a lease or PPA quote alongside your purchase quote. Compare the two ownership paths against leasing directly in our Lease vs Buy Calculator.
The dealer-fee trap
The most expensive mistake in solar financing is choosing a loan by its advertised interest rate alone. Loans promoted at 0.99% or 1.99% APR almost always carry a hidden ‘dealer fee’ of 15–30% baked into the system price. The result: the financed system costs thousands more than the same system bought with cash, because you are pre-paying the interest inside an inflated price.
| Cash price | ‘1.99%’ loan price | |
|---|---|---|
| System price quoted | $21,000 | $27,000 |
| Dealer fee baked in | $0 | ~$6,000 |
| Federal credit (2026 install) | $0 | $0 |
| Net cost | $21,000 | $27,000 |
Resale and the home-value factor
Ownership pays off again when you sell. Research from Lawrence Berkeley National Laboratory and Zillow has found homes with owned solar sell for a measurable premium — Zillow's analysis put it around 4.1% on average — a gain separate from the electricity you have already saved. A $30,000 system commonly adds $15,000–$20,000 to resale value.
Leased systems do the opposite. A buyer must qualify to assume the remaining lease, which shrinks your buyer pool and can delay or complicate closing. Some buyers walk away rather than take on a 15-year obligation they didn't choose. This resale gap is one more reason ownership beats leasing for anyone who might move within the system's life — see the full lifetime math in our solar lifespan and ROI guide.
Questions to ask before you sign
Whichever path you choose, these questions separate a fair deal from an expensive one. Ask every salesperson, and get the answers in writing:
- “What is the cash price versus the financed price?” The gap reveals any hidden dealer fee.
- “Is any federal tax credit involved, and who claims it?” For a 2026 purchase the answer should be ‘none’ — the 30% homeowner credit ended after 2025. On a lease or PPA, ask whether the company is claiming the 48E credit and how much of it is reflected in your rate.
- “What is the annual escalator?” On a lease or PPA, a 2.9% escalator roughly doubles your payment over 25 years.
- “What is the production guarantee, and what happens if the system underproduces?”
- “What are the transfer terms if I sell the home?” Critical for leases and PPAs.
- “What is covered by warranty, for how long, and who services it?”
A reputable installer answers all of these plainly. Evasiveness on the cash price or the escalator is the clearest red flag in the industry.
A year-by-year view of the lease trap
The reason leases look attractive at signing but cost the most over time is the escalator. A lease that starts at $105/month with a 2.9% annual increase does not stay at $105 — it climbs every year for 25 years:
| Year | Monthly payment | Annual cost |
|---|---|---|
| Year 1 | $105 | $1,260 |
| Year 10 | $136 | $1,632 |
| Year 20 | $181 | $2,172 |
| Year 25 | $209 | $2,508 |
Add those rising payments across 25 years and the total typically exceeds $40,000 — for a system you never own. By contrast, a purchase is a fixed, one-time cost (or a fixed loan payment) that ends, after which your power is essentially free. This is the single clearest argument for ownership.
What happens when a lease ends — and buyouts
A lease or PPA is a 20–25 year commitment, so it is worth understanding the exit options before you sign:
- Renew — extend the agreement, often at a reduced rate, but you still never own the panels.
- Buy out — purchase the system at a price set by the company. Buyout figures are frequently higher than the aged system's real value, so read the buyout schedule in your contract before signing.
- Removal — have the company remove the equipment, which can leave roof penetrations to patch.
The buyout clause is where many lessees feel trapped: they discover that ‘owning’ their panels later costs far more than buying outright would have at the start. If there is any chance you will want to own the system, a loan from day one is almost always cheaper than leasing now and buying out later. Model both routes in the Financing Calculator before committing.
The verdict
For the large majority of homeowners, the ranking is clear:
- Cash — lowest lifetime cost; best if you have the funds and value a guaranteed return.
- Loan — you own the system while spreading the cost, but without the 30% credit the interest bites harder. Compare against the true cash price and a fair lease quote.
- Lease/PPA — lowest barrier to entry; usually the highest lifetime cost, but in 2026 a lease priced with the 48E credit and a low escalator can beat an expensive loan.