Buying solar vs leasing vs a PPA

By the SolarPayback Editorial Team · Updated June 2026 · Researched from authoritative sources. General information, not professional advice.

How you pay for solar matters almost as much as whether you go solar at all. The same panels on the same roof can save you tens of thousands of dollars or only a modest amount, depending on whether you buy the system outright, finance it with a loan, or sign a lease or power purchase agreement (PPA). The deciding factor in nearly every case comes down to one word: ownership.

The four ways to pay for solar

There are really only four common paths, and they split cleanly into two camps. With a cash purchase or a solar loan, you own the system. With a lease or a PPA, a third party owns it and you pay them to use the power it produces. That single ownership line determines who claims the federal tax credit, who pockets state incentives, how much you save over 25 years, and how complicated things get when you eventually sell your home.

Cash purchase: the best lifetime savings

Paying cash gives you the lowest total cost and the highest lifetime savings, because there is no interest and no third party taking a cut of your production. You own the panels outright, so you can claim the IRS Residential Clean Energy Credit, which lets the system owner subtract a percentage of the installed cost from the federal income tax they owe. You also keep any state rebates, performance payments, and net-metering credits for yourself.

The obvious drawback is the upfront cost: a residential system is a five-figure expense paid all at once. If you have the capital and a tax liability large enough to actually use the credit, cash typically wins on pure math. The U.S. Department of Energy's Homeowner's Guide to Going Solar describes ownership, whether by cash or loan, as the route that generally delivers the strongest long-term value.

Solar loan: ownership without the big check

A solar loan lets you own the system with little or no money down, so you still claim the Residential Clean Energy Credit and still keep the incentives, while spreading the cost out over time. Many borrowers use their tax-credit refund to make a one-time principal payment that re-amortizes the loan down to a lower monthly figure.

The thing to watch for is dealer fees baked into the interest rate. A "no-fee" loan with a low advertised rate may carry a large hidden dealer fee that quietly inflates the system price by thousands of dollars. Always ask the installer for the cash price and the financed price side by side. A genuinely low all-in cost matters far more than a flashy monthly payment.

• Compare the cash price against the financed total, not just the monthly payment.
• Confirm the loan term, the APR, and whether the rate is fixed for the life of the loan.
• Check for prepayment penalties before you plan to use the tax credit to pay down principal.

Lease: low effort, lower savings

With a lease, a third-party company installs and owns the panels on your roof, and you pay a fixed monthly amount to use them. It is appealing because there is usually $0 down and the company handles maintenance and monitoring. But the trade-offs are significant:

• You do not get the tax credit. Because the company owns the system, it claims the Residential Clean Energy Credit and collects the state incentives. The IRS credit follows the owner, not the roof.
• Escalator clauses. Many leases raise your monthly payment by a set percentage every year. If that escalator outpaces local utility rate increases, your savings shrink over the life of the contract.
• Lower lifetime savings. After the company takes its margin, you keep less of the value the panels produce than an owner would.

PPA: paying per kilowatt-hour

A power purchase agreement is structured much like a lease, with one key difference: instead of a fixed monthly payment, you pay a set price for each kilowatt-hour the system produces. The third party still owns the equipment, still claims the tax credit and incentives, and still handles maintenance. PPAs also commonly include an annual price escalator, so the same caution applies, compare the contract's escalator against expected utility rate growth. The ownership and home-sale complications are identical to a lease.

Why ownership usually beats third-party

Across all four options, the owner captures the full value of the system: the tax credit, the incentives, and every kilowatt-hour of essentially free electricity after the system is paid off. A lease or PPA provider is a business that has to earn a return, so part of the value your roof produces becomes their profit instead of your savings. For most homeowners with enough tax liability to use the credit, owning, by cash or loan, produces materially higher savings over the 25-plus-year life of the panels.

The home-sale problem with leases and PPAs

This is where third-party arrangements get expensive in ways that are easy to overlook at signing. When you own your system, it is part of the house, generally adds to its value, and transfers cleanly at closing. With a lease or PPA, the contract is attached to a system you do not own, and your buyer typically has two choices: assume the remaining contract, or have you buy it out.

Assumption is not automatic. The buyer usually must qualify with the solar company, similar to a credit application, and some buyers simply do not want to inherit a 15-to-20-year obligation with an escalating payment attached to a house they are still negotiating. Sales have stalled or required last-minute buyouts because of exactly this. If there is any chance you will sell before the contract ends, understand the buyout figure in advance.

Questions to ask before you sign

• Escalator rate: Does the monthly payment or per-kWh price rise each year, and by exactly how much?
• Buyout terms: What does it cost to buy out the contract at year 5, year 10, and year 15?
• Transferability: Can the contract transfer to a buyer, and what must that buyer qualify for?
• Production guarantee: Does the company guarantee output, and what happens if the system underperforms?
• All-in cost: For a loan, what is the cash price versus the financed total after any dealer fees?

Where to verify the details

Before deciding, check primary sources rather than relying on a salesperson's summary. The DOE Homeowner's Guide to Going Solar walks through ownership versus third-party financing in plain language. The IRS pages on the Residential Clean Energy Credit spell out that only the system owner can claim it. And DSIRE (the Database of State Incentives for Renewables & Efficiency) lists the rebates, tax credits, and net-metering rules specific to your state, which often tip the comparison one way or the other.

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