See how many years until your solar system pays back, and your net savings over 25 years — after the tax credit and rising electricity prices. ✓ 2026 credit
Break-even • 25-yr savings
Solar pays for itself when your cumulative electricity savings exceed the net system cost. After the federal tax credit (and any state incentives), a typical system nets out to its sticker price minus 30% or so. Each year the panels offset most of your electric bill — and because utility prices tend to rise ~3% a year, those savings grow over time.
Most US homeowners see a payback of 7–12 years, after which the electricity is essentially free for the panels' 25+ year life. Note the residential solar credit is phasing down after 2025–2026, so the timing of your install affects the credit you receive. This is an estimate excluding financing, maintenance and resale value.
Solar payback divides the net installed cost by annual electricity savings, and the word net is doing most of the work. The federal Investment Tax Credit removes 30% of the gross cost, and state or utility rebates can reduce it further, so payback computed on the sticker price overstates the period substantially. The second variable is what happens to electricity prices: because utility rates have historically risen faster than general inflation, the savings grow each year, which shortens payback and dramatically increases lifetime value. Panel degradation works the other way but is slow, typically 0.5% of output a year.
Net cost = Gross cost × (1 − tax credit) − rebatesAnnual saving = Annual production (kWh) × electricity rateSimple payback = Net cost ÷ Annual savingLifetime saving = Annual saving × [((1 + escalation)^n − 1) ÷ escalation]where:
Assumptions: Assumes you have enough tax liability to use the credit, and excludes financing costs. Net metering rules vary enormously by state and are being reduced in several — the value of exported power is the largest single uncertainty in any solar projection.
Work from gross cost through the tax credit to payback and lifetime value.
Result8.3-year payback — about $47,792 net over 25 years
The escalation assumption matters more than it appears: at 0% escalation the 25-year saving falls to $46,250, and at 4% it rises to $77,000. Since the panels are warranted for 25 years and typically last longer, the years after payback are effectively free electricity.