Solar Lease vs Buy vs Loan: Which Is Cheapest in 2026?

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 collects the 30% federal tax credit (worth ~$6,300 on a typical system), who keeps any state incentives, and who captures the home-value increase. Owners get all three; lessees get none of them.

Lifetime cost comparison

Here is how the three options typically compare on a $21,000, 7 kW system over 25 years:

Cash wins because you avoid all interest and keep the full credit. A loan costs more only by the interest you pay — while letting you keep your savings invested elsewhere. The lease's $0-down appeal is offset by two decades of escalating payments plus the forfeited tax credit. 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, claim the 30% credit on your next tax return, and own a 25-year asset free and clear. There are no payments, no interest, and no contracts.

The trade-off is liquidity: you tie up $15,000–$25,000 that could be invested elsewhere. The right way to judge this is opportunity cost — compare solar's effective 6–9% tax-free, inflation-protected return (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 the 30% credit and the home-value bump. You typically finance 100% of the price, then receive the credit as a tax refund the following year. The savviest borrowers apply that refund as a lump-sum prepayment, which re-amortizes the loan and sharply lowers the monthly payment.

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 — on longer terms and after applying the credit, they often do from day one. 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 the 30% federal credit and any state incentives — not you. Combined with escalating payments, this is why leases typically cost the most over the system's life. They also complicate selling your home, as we cover below.

Who should actually lease?

Leases get a bad reputation, but they genuinely suit a narrow group:

• Homeowners with little or no federal tax liability who can't use the 30% credit even with the carryforward.
• 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 everyone else, owning — with cash or a loan — is the clear winner. 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.

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.
• “Who claims the 30% federal tax credit?” If it is not you, you do not own the system.
• “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:

Add those rising payments across 25 years and the total typically exceeds $40,000 — for a system you never own and never get the tax credit on. 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:

1. Cash — lowest lifetime cost; best if you have the funds and value a guaranteed return.
2. Loan — the best balance; you own the system and the credit while spreading the cost. Just compare against the true cash price.
3. Lease/PPA — lowest barrier to entry, highest lifetime cost; sensible only for a narrow group.