Cash vs. Loan vs. Lease Comparator
Put the three ways to pay for solar side by side and see which delivers the most over 25 years.
How you pay for solar changes the economics as much as the system itself. Paying cash and taking a loan both keep ownership and the 30% federal credit; a lease or PPA trades that away for a low upfront cost. Enter your numbers to see all three side by side — monthly cost and 25-year net benefit — and which comes out ahead for your situation.
Pay cash
Best 25-yr value25-year net benefit
—
- Upfront cost
- —
- Owns system + credit
- Yes
Solar loan
Best 25-yr value25-year net benefit
—
- Monthly payment
- —
- Total interest
- —
Lease / PPA
Best 25-yr value25-year net benefit
—
- Starting payment
- —
- Owns system + credit
- No
What the comparison is really weighing
Every column earns the same electricity savings; what differs is the cost of getting there. Cash pays once and avoids interest. A loan spreads the cost and adds interest, but still keeps the credit and the equity. A lease or PPA removes the upfront hurdle and the maintenance worry, at the price of the credit and long-run ownership. The highlighted card is simply the largest 25-year net benefit on your inputs — but the monthly numbers, your available cash, and how long you plan to stay in the home all matter alongside that single figure.
Frequently Asked Questions
Is it better to buy or lease solar panels?
Buying — with cash or a loan — keeps ownership and the 30% federal tax credit, which usually gives the best lifetime value. A lease or PPA needs little or no money down and hands maintenance to the provider, but you forgo the credit and the equity, so it typically trails on 25-year net benefit. This tool compares all three on your own numbers.
How is the 25-year net benefit calculated?
It adds up 25 years of electricity bill savings (grown by your rate-increase assumption) and subtracts what each option costs: the net price for cash, the total loan payments (minus the credit) for a loan, and the escalating lease payments for a lease. It’s a planning estimate, not a quote.
Does a lease or PPA get the federal tax credit?
No. With a lease or power-purchase agreement, the third-party owner claims the 30% credit, not you. That’s a big part of why owned systems tend to come out ahead over the full system life, even though a lease can look cheaper month to month.
Which option has the lowest upfront cost?
A lease or PPA usually starts at $0 down, and a loan can too. Paying cash has the highest upfront cost but no interest and the fastest path to free electricity once it’s recovered. The right trade-off depends on your cash, rate, and how long you’ll stay in the home.