Solar Lease vs Buy (Loan or Cash): Which Saves the Most?

Solar lease vs buy got more complicated in 2026. The 30% federal credit for homeowner-owned systems (Section 25D) ended for systems placed in service after Dec 31, 2025. Third-party-owned systems (leases and PPAs) may still qualify for a business credit (48E) for the owner, under rules that are still changing. That shifts the math between cash, loans and leases.

Solar Lease vs Buy: The Four Options

	Cash	Loan	Lease	PPA
Who owns it	You	You	Company	Company
Upfront cost	Full price	Low or $0	Low or $0	Low or $0
You pay	Once	Monthly loan	Fixed monthly	Per kWh produced
Lifetime savings	Highest	Medium	Lower	Lower
Maintenance	You (warranties help)	You	Company	Company
Federal credit (2026)	No (25D ended)	No (25D ended)	Owner may claim 48E	Owner may claim 48E

General comparison. Read every contract. Tax treatment per IRS guidance; consult a tax professional.

Cash: Best Long-Term Value

Cash buyers pay the lowest price per watt. Berkeley Lab’s latest data puts the 2024 median at about $3.5/W for cash, against about $4.7/W for loan-financed systems, partly because of dealer fees built into loans.

Loans: Ownership Without the Upfront Cost

Watch for dealer fees, which can add 20–30% to the price in exchange for a low advertised rate. Ask for the cash price and the loan price side by side.

Leases and PPAs: Lowest Effort

You get lower bills without owning anything. Check the escalator (yearly payment increase, often 0–3%), the term (often 20–25 years), and what happens when you sell your home: the buyer must qualify to take over the contract, or you buy it out.

With the 48E credit available to third-party owners, some installers are pushing leases harder in 2026. Under IRS Notice 2025-42, solar that begins construction after July 4, 2026 must be in service by the end of 2027 to qualify, so ask how the company’s timeline fits.

Which Saves the Most?

1. Cash, if you can afford it and plan to stay
2. A low-fee loan, if the payment is below your current bill
3. A lease or PPA, if you can’t use ownership benefits or want zero maintenance

Worked Example: 25-Year Cost of Each Option

Here’s one 7 kW system making 9,800 kWh in year one, compared four ways. Every figure below is illustrative. Use your own quotes.

Option	Assumptions	Paid over 25 years
Cash	$24,500 at LBNL’s 2024 cash median of $3.5/W	$24,500
Loan	$32,900 at LBNL’s loan median of $4.7/W, 20 years at 7.99% APR	about $66,000 (about $275/month)
Lease, flat	$120/month, 0% escalator	$36,000
Lease, escalating	$120/month rising 2.9% a year	about $51,800 (about $238/month by year 25)
PPA	$0.15/kWh, 2.9% escalator, output falling 0.5%/yr	about $49,500

Cash costs the least in total, but it ties up the most money on day one. The loan costs the most in total at this rate, but you own the system and keep any value at sale. The lease and PPA costs depend heavily on the escalator: the same $120 lease costs about $15,800 more with a 2.9% escalator than with none.

Worked Example: Year-One Net Savings

Bill savings minus what you pay for the system shows whether each option saves money from the start. Assume the 9,800 kWh system offsets power at $0.20/kWh, saving $1,960 in year one (illustrative):

Option	Year-one payment	Year-one bill savings	Net in year one
Cash	$24,500 up front	$1,960	Negative until payback (about 12.5 years)
Loan at 7.99%	about $3,300	$1,960	about −$1,340
Loan at 3.99%	about $2,390	$1,960	about −$430
Lease, $120/month	$1,440	$1,960	about +$520
PPA, $0.15/kWh	$1,470	$1,960	about +$490

Leases and PPAs often save from month one, but less over time, especially with escalators. A loan may cost more each month than it saves until it’s paid off, and then the savings are all yours. At a higher utility rate, such as $0.30/kWh, every row improves by $980.

How Escalators Compound

An escalator raises the payment every year. Over 25 years the effect is large:

Escalator	Year-1 monthly	Year-25 monthly
0%	$120	$120
1.9%	$120	about $189
2.9%	$120	about $238

Compare the year-25 payment with what you expect to pay the utility. If utility rates rise more slowly than the escalator, savings shrink each year.

Step-by-Step: Comparing Offers Side by Side

1. Get the cash price for the exact system, even if you plan to finance.
2. For loans, get the APR, term, monthly payment, total of payments, and any dealer fee in writing. See solar loan rates and dealer fees.
3. For leases, get the monthly payment, escalator, term, buyout schedule and transfer rules.
4. For PPAs, get the price per kWh, escalator, production estimate and any minimum-production guarantee.
5. Estimate your utility bill with and without solar for year one.
6. Total each option over 25 years and compare it with expected bill savings. Our solar payback period guide includes a spreadsheet you can adapt.

Questions to Ask Before Signing a Lease or PPA

The FTC’s guide “Solar Power for Your Home” recommends getting all promises in writing and understanding the contract before signing. Specific questions:

• What’s the escalator, and is it fixed for the whole term?
• Who handles roof work if panels need to come off, and who pays?
• What happens at the end of the term: removal, renewal or purchase?
• What does it cost to buy the system out in year 5, 10 or 15?
• What does a home buyer need to qualify to take over the contract?
• Does the company place a UCC filing or other notice on the property?

Selling with a lease is covered in solar lease buyout and selling a house with solar.

Ownership Effects Beyond Price

Factor	Own (cash or loan)	Lease or PPA
Home sale	System transfers with the house	Buyer assumes the contract or you buy it out
State incentives	Usually go to the owner	Usually go to the leasing company
Battery add-on later	Your choice	Must go through the provider
Production risk	Yours, backed by warranties	Provider’s, sometimes with a production guarantee
Federal credit (2026)	None (25D ended)	Owner may claim 48E if eligible

When Each Option Fits

• Cash: you have savings, plan to stay 10+ years, and want the lowest total cost.
• Loan: you want ownership, can find a low APR with no dealer fee, and the payment is close to your bill savings.
• Lease or PPA: you want no upfront cost and no maintenance, and the escalator is low. Check that your payment stays below your expected utility rate.

For system costs, see how much do solar panels cost. For the tax picture, see is the solar tax credit gone in 2026.

FAQ

Is it better to lease or buy solar?

Buying usually saves more over 25 years. Leasing has less upfront risk.

Does a solar lease hurt home sales?

It can slow them down. Buyers have to assume the lease or you pay it off.

Can I still get a solar tax credit in 2026?

Not for a system you own (25D ended after 2025). Lease and PPA owners may claim 48E.

What is the difference between a solar lease and a PPA?

With a lease, you pay a fixed monthly amount for the equipment. With a PPA, you pay for each kWh the system produces, so the bill varies with output.

Can I buy out a solar lease early?

Many leases include a buyout option at set points. The price is in the contract, so ask for the schedule before signing.

Does leasing solar affect my credit?

Leasing companies typically run a credit check before approval. Ask whether it’s a soft or hard inquiry.

Sources: FTC, “Solar Power for Your Home”; DOE, “Homeowner’s Guide to Solar Financing”; IRS Notice 2025-42; LBNL 2025 data update; FTC, “Solar Power for Your Home” (consumer guidance on leases, PPAs and contracts). Accessed Oct 2026.

Related: Adjustable Solar Panel Mounting Brackets Review, Solar Sheen Glass Solar Panel Cleaning