Every solar quote comes with a slide showing you saving money starting day one. That slide almost never shows the years it takes to actually get back what you spent, especially now that the 30% federal tax credit is gone. This calculator fills in that gap using your own numbers instead of a sales deck’s assumptions.
Short version: Enter your system cost, current electric bill, and expected monthly savings, and this calculator shows exactly how many years until solar breaks even, plus what it saves you over 25 years after that. If you already know how long you’re staying in the house, it’ll tell you straight up whether the timeline works in your favor.
How to use this
Get your system cost and expected monthly savings from an actual quote, not a marketing estimate, most installers will give you both numbers along with your current usage. If you’re not sure what your solar savings would actually be, ask the installer to show you their production estimate against your last 12 months of utility bills, not just a percentage they’re promising.
If you qualify for a one-time state or utility rebate on top of the (now-gone) federal credit, check that box and enter it, it directly lowers what you need to recoup. If you want a more realistic long-term picture, turn on the rising electricity rates option, most utility rates climb a few percent a year, which means your solar savings are worth more in year 10 than they are in year 1. And if you already know roughly how long you’re staying, entering that gives you a direct answer instead of a number you have to interpret yourself.
For the full picture on why this math changed for 2026, is solar still worth it now that the tax credit is gone walks through what happened and why payback periods run longer than what a lot of people still assume.
Solar Payback Calculator
See how many years until solar pays for itself, and what it saves you after that.
Your System and Bill
Optional Details
Cumulative Net Position
Payback Chart
Assumes system cost paid out of pocket, not financed with a loan, and monthly savings stay level unless you enable rising electricity rates above. This is an estimate to guide your own research, not a quote from any installer.
Reading your results
Two numbers matter most: your payback period, and how that compares to how long you're staying. A payback under 10 years with a long-term stay ahead of you is a strong position, everything past that point is close to free electricity. A payback that lands after you'd realistically move is the scenario worth thinking hardest about, since you won't be around to collect on most of the savings.
Frequently Asked Questions
No, it assumes you're paying the system cost out of pocket. A solar loan adds interest cost on top of the system price, which would stretch your real payback period beyond what this calculator shows. Ask your lender for the loan's total cost before comparing it to a cash purchase.
Because your solar savings are based on what you'd otherwise pay the utility. As utility rates climb, the value of the electricity your system produces climbs with it, so later years of ownership save you more than earlier ones, which pulls your break-even point earlier too.
That's normal and expected for most systems. Enter your realistic expected monthly savings, not your full bill, the calculator's "% of bill offset" gauge shows you exactly how much of your usage the system is actually covering.
Use the installer's number, but sanity check it against your own utility bills first. If your average bill is $200 and a quote claims $220 in monthly savings, that's a red flag worth asking about before you sign anything.
You may not recoup the full cost through utility savings alone before you'd move. Whether that still makes sense depends on factors this calculator doesn't cover, like a potential resale bump or a shorter timeline becoming a longer one, so treat that scenario as a flag to think through carefully, not an automatic no.