The average solar panel payback period in 2026, after the federal tax credit expired on December 31, 2025, is about 10 years. But that number ranges from roughly 5 years in Massachusetts to 18 years in Louisiana, and the single biggest factor isn’t how much sun you get. It’s what you pay per kilowatt-hour of electricity.
We ran the state-by-state numbers using EIA December 2025 rates and post-ITC installed costs — here’s what we found. If you’ve been researching solar and the payback estimates feel higher than what installers quoted you a year ago, you’re not imagining it. The 30% federal investment tax credit that used to take a $30,000 system down to $21,000 is gone. That’s $9,000 that no longer comes off your cost basis, which means payback periods in most states are now 1.5 to 3 years longer than the figures you’ll still find on most solar comparison sites.
The state table below is the fastest place to start. Find your state, then use the payback calculator to personalize the number for your actual bill and roof. One caveat: electricity rates and state incentive programs change: we update this data periodically, but always verify your state’s current programs via DSIRE before making a decision. This guide also covers the honest cases where the math doesn’t work, which most solar sites skip.
Table of Contents
- What is the solar panel payback period?
- Solar Panel Payback Period by State
- Solar Payback Calculator
- What actually moves your payback number
- How to calculate your personal payback
- Beyond payback: the 25-year picture
- When solar doesn’t make financial sense
- Frequently Asked Questions
- Conclusion
For a broader look at how solar works as a home investment, see our complete guide to solar panels for homeowners.
What Is the Solar Panel Payback Period?
The solar panel payback period is the number of years it takes for your electricity savings to equal what you paid for the system. After that point, every year you’re getting essentially free electricity. It’s different from ROI. A 10-year payback on a panel with a 25-year warranty still leaves 15 years of near-zero electricity bills after break-even — that’s where the real financial return lives.
The formula is straightforward:
Annual savings = System production (kWh/yr) × your electricity rate ($/kWh)
Worked example: 10 kW system in New Jersey
- Installed price: $28,000 (EnergySage Q1 2026 marketplace median)
- NJ incentives: NJ SuSI + sales tax exemption ≈ $4,200 first-year value
- Net cost: $23,800
- System production: ~11,500 kWh/year (NREL PVWatts, south-facing, moderate shade)
- NJ avg electricity rate: 18.3¢/kWh (EIA Dec 2025)
- Annual savings: 11,500 × $0.183 = $2,105/year
- Payback: $23,800 ÷ $2,105 = 11.3 years
Run the same math in Hawaii, where electricity costs 38¢/kWh, and payback drops to around 6 years. In Louisiana at 10¢/kWh with no meaningful state incentives, you’re looking at 17+ years.
⚠️ Quick check before you read the table: If you received an installer quote in 2025 or early 2026, ask whether that payback estimate assumes the 30% federal tax credit. Many quote tools haven’t been updated, and the credit expired December 31, 2025. If you can’t claim it, your real payback is longer than what you were shown.
Solar Panel Payback Period by State
The table below uses a 10 kW system baseline, EIA Dec 2025 residential electricity rates, EnergySage Q1 2026 installed pricing by region, NREL production estimates, and DSIRE-verified state incentives only (no federal ITC). Each solar panel payback period figure reflects the most common homeowner scenario in each state, not best-case.
Color key: ≤8 years: strong financial case | 9–12 years: solid | 13–15 years: marginal | 15+ years: weak
| State | Avg rate (¢/kWh) | Net system cost* | Est. annual savings | Payback (yrs) | 25-yr net savings† |
|---|---|---|---|---|---|
| Hawaii | 38.1¢ | $24,500 | $4,100 | 6.0 | $77,500 |
| Massachusetts | 24.8¢ | $20,200 | $2,980 | 6.8 | $54,300 |
| Connecticut | 22.7¢ | $21,500 | $2,720 | 7.9 | $46,500 |
| Rhode Island | 21.9¢ | $20,800 | $2,630 | 7.9 | $44,950 |
| New York | 20.4¢ | $19,800 | $2,450 | 8.1 | $41,450 |
| California (NEM 2.0 grandfathered) | 26.8¢ | $25,000 | $3,120 | 8.0 | $53,000 |
| California (NEM 3.0) | 26.8¢ | $25,000 | $2,200 | 11.4 | $30,000 |
| New Hampshire | 20.8¢ | $22,000 | $1,975 | 11.1 | $27,375 |
| Vermont | 19.7¢ | $21,200 | $1,870 | 11.3 | $25,550 |
| New Jersey | 18.3¢ | $23,800 | $2,105 | 11.3 | $28,825 |
| Maine | 19.2¢ | $21,800 | $1,825 | 11.9 | $23,825 |
| Maryland | 15.8¢ | $22,100 | $1,895 | 11.7 | $25,275 |
| Arizona | 13.9¢ | $22,500 | $2,085 | 10.8 | $29,625 |
| Nevada | 12.8¢ | $22,200 | $1,920 | 11.6 | $25,800 |
| Colorado | 13.7¢ | $22,800 | $1,780 | 12.8 | $21,700 |
| New Mexico | 13.4¢ | $23,200 | $1,876 | 12.4 | $23,700 |
| Delaware | 14.1¢ | $22,800 | $1,692 | 13.5 | $19,500 |
| Illinois | 13.4¢ | $22,300 | $1,610 | 13.9 | $17,950 |
| Florida | 13.2¢ | $24,000 | $1,848 | 13.0 | $22,200 |
| South Carolina | 13.1¢ | $23,900 | $1,703 | 14.0 | $18,575 |
| Texas | 12.5¢ | $24,200 | $1,750 | 13.8 | $19,550 |
| Oregon | 12.9¢ | $23,100 | $1,550 | 14.9 | $15,650 |
| North Carolina | 12.3¢ | $23,800 | $1,599 | 14.9 | $15,775 |
| Pennsylvania | 14.5¢ | $23,200 | $1,595 | 14.5 | $16,675 |
| Virginia | 12.7¢ | $23,500 | $1,524 | 15.4 | $14,600 |
| Georgia | 12.0¢ | $23,600 | $1,560 | 15.1 | $15,400 |
| Utah | 11.0¢ | $23,400 | $1,540 | 15.2 | $15,100 |
| Michigan | 16.7¢ | $23,400 | $1,503 | 15.6 | $14,175 |
| Ohio | 13.0¢ | $23,100 | $1,430 | 16.2 | $12,650 |
| Alabama | 12.0¢ | $23,700 | $1,440 | 16.5 | $12,300 |
| Tennessee | 11.5¢ | $23,800 | $1,380 | 17.2 | $10,700 |
| Minnesota | 13.5¢ | $23,500 | $1,350 | 17.4 | $10,250 |
| Wisconsin | 14.9¢ | $23,200 | $1,341 | 17.3 | $10,325 |
| Mississippi | 11.4¢ | $23,600 | $1,368 | 17.3 | $10,600 |
| Oklahoma | 10.5¢ | $23,600 | $1,365 | 17.3 | $10,425 |
| Kansas | 11.9¢ | $23,200 | $1,309 | 17.7 | $9,525 |
| Indiana | 12.8¢ | $23,100 | $1,280 | 18.0 | $8,900 |
| Louisiana | 9.8¢ | $23,900 | $1,313 | 18.2 | $8,925 |
| Arkansas | 10.7¢ | $23,800 | $1,284 | 18.5 | $8,300 |
| Missouri | 11.2¢ | $23,500 | $1,232 | 19.1 | $7,300 |
| Iowa | 11.4¢ | $23,100 | $1,197 | 19.3 | $6,825 |
| Kentucky | 10.9¢ | $23,400 | $1,199 | 19.5 | $6,575 |
| Nebraska | 10.8¢ | $23,400 | $1,188 | 19.7 | $6,300 |
| Wyoming | 10.3¢ | $23,500 | $1,133 | 20.7 | $4,825 |
| West Virginia | 10.1¢ | $23,800 | $1,111 | 21.4 | $3,975 |
| Montana | 11.5¢ | $23,500 | $1,104 | 21.3 | $4,100 |
| Idaho | 9.9¢ | $23,300 | $1,069 | 21.8 | $3,425 |
| South Dakota | 11.1¢ | $23,400 | $999 | 23.4 | $675 |
| Washington | 10.0¢ | $23,100 | $1,000 | 23.1 | $1,900 |
| North Dakota | 10.6¢ | $23,600 | $955 | 24.7 | -$770 |
| Alaska | 19.2¢ | $28,500 | $960 | 29.7+ | N/A |
* Net system cost = installed price minus verified state incentives only. No federal ITC included. † 25-year net savings = total savings over 25 years minus net system cost, accounting for 0.5%/yr panel degradation. Negative values indicate the system does not fully pay back within 25 years at current rates. ‡ Alaska and North Dakota face a combination of higher installed costs, lower peak sun hours, and low electricity rates. Their extreme payback figures reflect this stacked disadvantage, not an error. Sources: EIA Electric Power Monthly Dec 2025, EnergySage Q1 2026, NREL PVWatts, DSIRE.
Solar Payback Calculator
Enter your monthly bill and state rate to estimate your break-even year. This is a quick estimate based on your bill; for roof-specific accuracy, run your address through NREL PVWatts first.
What actually moves your payback number
The state table is a starting point, not your number. Five factors will pull your personal payback earlier or push it later.
1. Your electricity rate (bigger than sunlight)
This surprises most homeowners. Arizona gets twice the sun of Massachusetts, but Massachusetts has a 10-year shorter payback in many cases. Why? Massachusetts homeowners pay 24–25¢/kWh while Arizona averages around 14¢/kWh. The savings per kilowatt-hour you generate depends entirely on what you're currently paying for electricity. If you're on a time-of-use rate, when you use electricity matters too.
2. Net metering policy in your state
Net metering is what happens when your panels produce more electricity than you're using. In states with full retail net metering, that excess goes back to the grid at the same rate you pay. In states that have weakened or eliminated net metering, you get a much lower rate for export.
California's NEM 3.0 (applies to all new residential installations) pays roughly 5–8¢/kWh for exported power. Florida reduced net metering compensation in 2024. The same-size system in the same climate can have a 3-year payback difference depending on net metering rules. Check your state's current policy via the DSIRE database (the U.S. Department of Energy's official incentive tracker) before trusting any payback estimate.
3. State incentives — now doing the heavy lifting
With the federal credit gone, state programs are the primary cost-reduction lever. The difference between states is substantial. Massachusetts offers the SMART program (pays per kWh generated for 10 years) plus a 15% state income tax credit. New York's NY-Sun incentive stacks with a 25% state tax credit up to $5,000. New Jersey adds the SuSI program plus no sales tax on solar equipment. Hawaii provides a 35% state income tax credit capped at $5,000. Texas, Florida, and Georgia have minimal state incentive programs, so payback depends almost entirely on electricity rate and system pricing.
4. Cash vs. financed purchase
If you pay cash, payback is straightforward: electricity savings recover the upfront cost. If you finance, part of your monthly savings goes toward loan payments, which extends your effective break-even. At a 7% solar loan rate (common in 2026), a $25,000 system financed over 10 years costs roughly $34,500 total. That means your real payback is when cumulative electricity savings equal $34,500, not $25,000.
That said, for many homeowners the monthly payment is less than their current electricity bill, making cash flow positive from day one even before full payback. A homeowner paying $220/month in electricity who locks in a $175/month loan payment is ahead immediately, though the longer payback clock is still real and worth tracking.
5. Panel degradation vs. electricity rate escalation
Panels lose roughly 0.5% of output each year for standard models (0.25–0.3% for premium N-type panels — see our solar panel rankings for current brand comparisons). That means a system producing 11,500 kWh in year one produces around 10,928 kWh in year 10. Electricity rates, however, have been rising. EIA data shows residential rates up an average of 4–5% annually in 2023–2025 in many regions. Higher rates mean higher savings per kWh, which shortens payback. Here's how rate escalation changes the 25-year picture:
| Rate annual increase | Payback change vs. flat rate | 25-yr savings change |
|---|---|---|
| 0% (conservative baseline) | Baseline | Baseline |
| 2%/year | ~0.6 years shorter | +$4,000–$7,000 |
| 4%/year (near recent trend) | ~1.4 years shorter | +$10,000–$18,000 |
| 6%/year | ~2.3 years shorter | +$19,000–$31,000 |
How to calculate your personal payback
The calculator above handles the basic math. But if you want to verify your installer's quote, or get a more precise production estimate based on your actual roof, here's the 20-minute process:
- Find your annual electricity usage. Pull the last 12 months of utility bills and add up the kWh. Most homeowners in the 2,000–3,500 sq ft range use 9,000–15,000 kWh/year.
- Estimate your system's annual production. Go to NREL PVWatts, enter your address, planned system size, and roof angle. It outputs estimated kWh per year using your local weather data, which is more accurate than any installer estimate.
- Calculate your annual savings. Take PVWatts production × your electricity rate (or plug the numbers into the calculator above). If your rate is 18¢ and production is 10,000 kWh, annual savings = $1,800.
- Get your net system cost. From installer quotes, subtract state incentives and local rebates. Do not subtract the federal ITC (it expired). Check DSIRE for current state programs.
- Divide net cost by annual savings. That's your payback in years.
If you haven't sized your system yet, our solar system sizing guide helps you estimate the right number of panels before running the payback numbers.
Beyond payback: the 25-year picture
The solar panel payback period is where most comparisons stop. The more useful question is what happens after break-even, because that's where the real financial argument either holds up or doesn't.
A system that breaks even in year 10 with a 25-year warranty has 15 years of essentially free electricity after that. At $1,800/year in savings with 3% annual rate escalation, those 15 years represent roughly $32,000 in savings. That's the actual return on the investment.
Solar Panels ROI vs. Investing the Same Money
This comparison makes most solar content uncomfortable, so most sites skip it. If you have $25,000 in cash and you're choosing between solar and a low-cost index fund, here's the honest picture. The S&P 500 has returned roughly 10% annually over the long run. Solar panels ROI, measured as internal rate of return (IRR), ranges from 8–20% depending on your state's electricity rate, incentives, and how long you stay in the home. In high-rate states with strong incentive stacks (Hawaii, Massachusetts, New York, New Jersey, Connecticut), solar's IRR of 15–20% beats market returns. In marginal states with paybacks of 13–15 years, the IRR is roughly 5–8%, which underperforms a basic index fund over the same period. In states with 18+ year paybacks, the math is straightforward: a comparable investment in an index fund does better, and we won't pretend otherwise. One wrinkle worth noting: solar savings come from money you'd have spent with after-tax income, which means a 10% solar IRR behaves more like a 12–13% pre-tax equivalent return — a real but often overlooked advantage in high-rate states.
Home value premium
Lawrence Berkeley National Laboratory research, consistently supported by Zillow data, shows owned solar systems increase home sale prices by approximately $4 per watt installed, or roughly 4–6% of home value in solar-active markets. A 10 kW system adds an estimated $40,000 in resale value in favorable markets. This changes the calculation if you're planning to sell before your payback period ends, since the home value premium can partially offset unrealized electricity savings. That said, the premium varies substantially by market. In areas with low solar adoption or weak buyer demand for solar, you may recoup significantly less than the LBNL average suggests. We'd treat this as a possible upside, not a guaranteed offset.
When solar doesn't make financial sense
Most solar content ends before this section. We pushed hard to include it, because honest research means telling some readers the answer is no.
Solar is usually not worth it if: your payback exceeds 17–18 years · you plan to move within 5–6 years · you're financing at 9%+ interest · your roof needs replacement within 5 years · your electricity rate is under 11¢/kWh with no meaningful state programs.
Solar is a poor financial decision in 2026 if you're in a low-rate state with no meaningful incentives and your payback exceeds 17–18 years, because that cash earns more invested elsewhere or applied to efficiency upgrades that pay back in 3–7 years. It's also the wrong call if you plan to move in less than 5–6 years, since electricity savings don't compound enough to offset costs in that window even with a partial home value premium. High-interest financing changes the math significantly too: at 9–10% solar loan rates (common with some in-house installer financing), the loan cost can exceed the electricity savings and leave your cash flow negative throughout the loan term.
The states where solar is hardest to justify on pure financial grounds are low-rate states with no SREC or significant rebate programs: Louisiana (9.8¢/kWh), Idaho (9.9¢), Washington (10¢), North Dakota (10.6¢). Solar may still make sense there for energy independence or environmental reasons, but not as a pure investment decision.
One more red flag worth naming: if your roof needs replacement within five years, panels come off and go back on at a cost of $3,000–$5,000. That erosion in economics is rarely mentioned in installer quotes.
One question we get a lot: should I wait for prices to drop further? Installed solar costs have fallen roughly 60% over the last decade, but the pace has slowed. EnergySage pricing data shows installed costs essentially flat from 2023 to early 2026 in most markets. Waiting for a price breakthrough makes sense if you're in a marginal state and genuinely undecided. But in high-rate states with strong incentive programs, the payback math already works now, and state programs can be reduced or capped (Massachusetts SMART has done this twice). Waiting in those states is a real risk of a different kind.
Before committing to solar, a home energy audit can reveal whether insulation, air sealing, or HVAC upgrades would deliver a faster return — particularly if you're in a marginal state. Our home energy audit guide covers what's assessed and what the results typically recommend.
Frequently Asked Questions
Conclusion
The solar panel payback period is no longer a single national number — post-ITC, it ranges from 5 years to well over 20 years depending on your state, electricity rate, and available incentives. The calculator above lets you estimate your personal break-even based on real inputs. If you're in a high-rate state with a strong state incentive program, the numbers likely still make a compelling case. If you're in a low-rate state with no state programs, the honest answer is that other home upgrades may return more per dollar. Wherever you land, getting at least three quotes through a transparent comparison platform and running the PVWatts math on your own roof is the only way to know for sure.
Solar likely makes sense if: electricity rate >18¢/kWh · payback <12 years · planning to stay 10+ years · strong state incentive program
Solar is marginal or risky if: electricity rate <12¢/kWh · payback >15 years · financing at 9%+ · moving within 6 years · roof needs work soon
The data in this guide is based on EIA December 2025 residential electricity rates, EnergySage Q1 2026 marketplace pricing, NREL PVWatts production estimates, and DSIRE state incentive data verified as of February 2026. All figures represent a representative 10 kW system scenario. Your actual payback will differ based on your specific location, roof characteristics, electricity usage, local utility rates, installer pricing, and net metering policy. This content is for informational purposes only. Always obtain multiple quotes from qualified, licensed installers before making any installation decision. Acara Institute has no financial relationship with any solar installer or equipment manufacturer.