Is it worth it?
Solar payback is net cost after incentives divided by annual savings — and in 2026 it got longer for most homeowners because the 30% federal credit is gone. Here's how the math works, a worked example, and why payback depends on your roof rather than one national number.
Updated June 30, 2026 · 9 min read
The short answer: solar payback in 2026 got longer for most homeowners. The 30% federal residential tax credit ended for systems completed after December 31, 2025, so the net price you pay went up — and that's the single biggest reason payback stretched out. The one thing pulling the other way is rising electricity rates, which make solar save you more each year. There is no single "national payback number" that's true for your roof; the figure that matters is the one you get from running your cost, your rate, and your local incentives.
You can do that in a few minutes with our residential solar estimate. But first, here's exactly how the math works and what changed this year.
Payback is just one division problem:
Simple payback (years) = Net system cost ÷ Annual electricity savings
That's it. If your net cost is $20,000 and solar saves you $2,000 a year, simple payback is 10 years. After that, the production is effectively free for as long as the system runs.
The word "simple" is doing real work here. This version ignores three things that matter over a 25-year horizon: financing interest if you take a loan, future electricity-rate increases that grow your savings, and panel degradation that slowly trims your output. We cover each of those below — but the two-line formula is the right place to start, because the two big forces that reshaped payback in 2026 each push on one side of that equation.
This is the big one: homeowners who buy a system with cash or a loan get $0 in federal tax credit in 2026. The Section 25D Residential Clean Energy Credit was terminated by Public Law 119-21 (the "One Big Beautiful Bill"). Per the IRS, "The credit will not be allowed for any expenditures made after December 31, 2025." (IRS FAQ on the modification of Section 25D under P.L. 119-21)
One detail trips people up, so read it carefully: eligibility hinges on the installation-complete date, not the payment date. Under the IRS guidance, "An expenditure with respect to an item is treated as made when the original installation of the item is completed." (IRS FAQ) So even if you signed and paid in 2025, a system that wasn't placed in service until 2026 cannot claim the credit.
Note: the IRS's standalone Section 25D web page still shows older "phase-out through 2033/2034" boilerplate. That schedule is outdated. The operative rule is the OBBB termination after December 31, 2025 — the language cited above — and it's what governs your 2026 return.
For the full breakdown of what died and what survived this year, see Is there a solar tax credit in 2026?
Losing a 30% subsidy lands directly on the numerator of the payback formula — your net cost. Independent analysis from EnergySage estimates the average homeowner will pay about 30% more out of pocket without the credit, which stretches payback periods by roughly 43%. (EnergySage — Solar payback periods will extend 43% longer without the ITC) Those are EnergySage's modeled estimates, not government figures, and they vary a lot by state — but the direction is unambiguous, and this is the chief reason your payback math got worse this year.
Now the part that works in solar's favor. Electricity got more expensive, and it's forecast to keep rising — which raises the denominator of the formula (your annual savings) and therefore shortens payback.
The EIA's June 2026 Short-Term Energy Outlook projects the U.S. average residential price will average 18.2 cents per kWh in 2026, a nearly 5% increase over 2025, with another roughly 2% rise expected in 2027. (EIA — Short-Term Energy Outlook, June 2026) Actual data is running even hotter: the April 2026 U.S. residential average came in at 18.83 cents/kWh, up 7.3% year over year. (EIA — Electricity Monthly Update, end-use prices) The EIA points to higher generation fuel costs and spending to bolster the transmission grid as the drivers, with regions including the East North Central and South Atlantic among those seeing notable increases.
To be clear about what this is: rising bills are bad for your wallet. But every cent your utility adds is a cent solar saves you, so higher rates improve solar's relative math. The more your rate climbs, the faster an owned system pays for itself.
Here's where the two forces collide. The numbers below are illustrative round numbers — not quotes, not your quote, and not pulled from any single source. They exist only to show the shape of the change. Your real figures will differ; that's what the calculator is for.
Imagine the same hypothetical system across three scenarios: how it would have penciled out in 2025 with the 30% credit, how it pencils out in 2026 with $0 credit, and how rising rates partially claw back the savings.
| Line item | 2025 (with 30% credit) | 2026 (no credit) | 2026 (no credit + higher rates) |
|---|---|---|---|
| Gross system cost | $24,000 | $24,000 | $24,000 |
| Federal tax credit | −$7,200 | $0 | $0 |
| Net cost | $16,800 | $24,000 | $24,000 |
| Annual electricity savings | $2,000 | $2,000 | $2,100 |
| Simple payback | ~8.4 years | ~12.0 years | ~11.4 years |
Read it left to right. Killing the credit raises net cost from $16,800 to $24,000 (about +43% on this illustrative system) and pushes payback from roughly 8.4 to 12 years. Then a rate increase lifts annual savings from $2,000 to $2,100, trimming payback back to about 11.4 years. The rate bump helps — it just doesn't come close to fully offsetting a lost 30% subsidy. That's the 2026 story in one table: net cost up a lot, savings up a little, payback longer on balance.
Again: every dollar figure above is illustrative. Don't anchor on "12 years." Anchor on the mechanics.
Simple payback is a useful gut check, but four real-world factors bend the curve. Here's which way each one pushes:
| Factor | Effect on payback | What this means |
|---|---|---|
| Rising electricity rates | Shortens | EIA forecasts continued increases through 2027; faster local rate growth means a quicker payoff. (EIA STEO) |
| Panel degradation | Lengthens (slightly) | Modern panels lose a median of ~0.5%/yr; output slowly slips. This is an NREL-supported assumption, not a guarantee. (NREL — Lifetime of PV Panels) |
| Loan interest | Lengthens | If you finance, interest adds to your true cost — a cash payback and a loan payback are not the same number. |
| 25-year horizon | Modeling assumption | A 25-year production window is reasonable but not promised; many panels run longer, some hotter-climate roofs shorter. |
On degradation and lifespan specifically: NREL puts the median degradation rate for modern crystalline-silicon panels at about 0.5% per year (and notes the rate can run higher in hotter climates and on rooftops), and manufacturers typically warrant panels for 20–25 years, commonly guaranteeing on the order of 80% of original output at year 25. (NREL — STAT FAQs Part 2: Lifetime of PV Panels) Treat these as conservative modeling assumptions, not promises — hotter climates and rooftop heat can push degradation somewhat higher, and plenty of panels keep producing well past 25 years.
This is exactly why one national payback figure can't stand in for your situation. Four levers vary enormously by location:
EnergySage's own modeling shows just how far the spread runs: in their analysis, payback without the federal credit ranges from under 6 years in the best cases (Washington, D.C. and Illinois land around 5.6–5.8 years) to more than 28 years in the worst (Utah tops their table near 28 years). (EnergySage) A sunny, high-rate state with strong net metering can still pay back fast; a low-rate state with weak incentives may not pencil out at all. A single "average U.S. payback is X years" figure almost certainly isn't true for your roof. To see how the states stack up, start with the best states for solar — but verify any state-specific incentive before you bank on it.
Everything above assumes you own the system — you bought it with cash or a loan. Leases and PPAs work differently: you don't own the panels, so there's no "payback period" in the ownership sense. You're swapping your utility bill for a lease or per-kWh payment, and the right way to evaluate that is to compare monthly cash flow, not to compute a break-even on a purchase price. If you're weighing how to pay for solar, the ownership-vs-lease tradeoff deserves its own look — and it changed meaningfully now that the federal credit (which favored ownership) is gone. We walk through all four options in how to pay for home solar in 2026: cash, loan, lease or PPA.
An average won't tell you much — your roof will. The 2026 payback for your home depends on your install price, your electricity rate, your sun, and whatever local incentives you actually qualify for. Plug those in and get a straight answer:
→ Get a free residential solar estimate
Want the bigger-picture context first? See Is home solar worth it in 2026? and the cornerstone 2026 solar incentives guide.
Methodology note: Every dollar figure in the worked example is illustrative and rounded for clarity — not sourced or representative of any specific quote. The calculator at /residential uses live inputs for your address, rate, and any incentives you qualify for. Degradation rates and the 25-year horizon are modeling assumptions supported by NREL, not guarantees.
Educational content, not tax, financial, or legal advice. Figures are current as of the update date above; verify with a qualified professional before acting.
There is no single national number — it depends on your system cost, electricity rate, sunlight, and local incentives. Payback got longer in 2026: with the 30% federal credit gone, net costs are roughly 30% higher and EnergySage estimates payback periods run about 43% longer than before. In EnergySage's state modeling, payback without the federal credit ranges from under 6 years in the best cases to more than 28 years in the worst. Run your own numbers on the calculator rather than trusting an average.
Simple payback (in years) = net system cost after incentives divided by your annual electricity savings. In 2026, for a cash or loan purchase, 'incentives' no longer includes the federal tax credit (it's $0), so net cost is the full price minus any state or local incentives. Annual savings is roughly the part of your yearly utility bill that solar offsets. This 'napkin' version ignores rate increases, loan interest, and panel degradation — useful for a gut check, but use a calculator for the real figure.
Not necessarily — it just makes the math longer and more location-dependent. The lost credit raises net cost about 30% and lengthens payback by roughly 43% (per EnergySage estimates, which vary by state). But rising electricity rates work in solar's favor: the EIA forecasts the U.S. residential average at 18.2 cents/kWh in 2026, up nearly 5%, with more increases ahead. Whether it pays off now hinges on your rate, sun, and state incentives, so run your specifics rather than a national average.
Yes, somewhat. Higher utility rates increase the annual savings in the payback formula, which shortens payback and partly offsets the loss of the federal credit. EIA's June 2026 outlook puts the U.S. residential average at about 18.2 cents/kWh in 2026 (up nearly 5% from 2025) with another roughly 2% rise expected in 2027, and recent actual data shows the April 2026 average at 18.83 cents/kWh, up 7.3% year over year. Faster-rising rates in your area generally mean a shorter payback.
A 25-year production horizon is the common modeling assumption, and it's a reasonable one: NREL data show modern crystalline-silicon panels degrade at a median of about 0.5% per year, and manufacturers typically warrant panels for 20–25 years, often guaranteeing around 80% of original output at year 25. Treat these as assumptions, not guarantees — NREL notes hot climates and rooftop heat can push degradation a bit higher, and many panels keep producing well beyond 25 years.
Free, no obligation, and sourced from the IRS, USDA, and EIA.