Solar · Calculator · 2026
Solar Panel Payback Calculator
Enter your state and monthly electric bill to estimate your solar payback period, net system cost after the 30% federal ITC and state incentives, and total 25-year savings.
A typical residential solar system in 2026 pays back in 7–12 years after the 30% federal tax credit, depending on your state's electricity rate and production potential. High-rate states like California, Massachusetts, and Hawaii pay back in 6–9 years. Lower-rate states like Georgia, Texas, and Florida average 9–13 years. Use the calculator below for your specific bill, state, and financing structure.
Solar Payback Calculator
EIA state electricity rates · NREL production factors · 2026 federal ITC + state incentives
Incentive stack breakdown
Solar Payback Period by State — 2026 Reference
Estimates for a typical 8–10 kW system, cash purchase, after 30% ITC. High-rate states pay back faster; lower-rate states have longer payback but still positive lifetime economics.
| State | Avg. Rate (¢/kWh) | Avg. Production (kWh/kW/yr) | State Incentive | Est. Payback |
|---|---|---|---|---|
| Hawaii | 36.0¢ | 1,550 | 35% state credit | 4–6 yrs |
| Massachusetts | 25.0¢ | 1,150 | 15% state credit + SMART | 6–8 yrs |
| California | 27.0¢ | 1,500 | NEM 3.0 (reduced export) | 7–10 yrs |
| New York | 22.0¢ | 1,150 | 25% credit (up to $5,000) | 7–9 yrs |
| New Jersey | 18.0¢ | 1,200 | Net metering + SREC market | 7–9 yrs |
| Maryland | 16.5¢ | 1,250 | Grant program available | 8–11 yrs |
| Michigan | 18.0¢ | 1,200 | None | 8–11 yrs |
| North Carolina | 12.5¢ | 1,300 | 35% credit (cap $10,500) | 8–11 yrs |
| South Carolina | 13.5¢ | 1,350 | 25% state credit | 9–12 yrs |
| Arizona | 12.5¢ | 1,600 | 25% credit (cap $1,000) | 9–12 yrs |
| Florida | 13.8¢ | 1,400 | Full net metering | 9–12 yrs |
| Colorado | 13.0¢ | 1,500 | Xcel Solar*Rewards rebate | 9–12 yrs |
| Nevada | 13.0¢ | 1,700 | Modified net metering | 9–12 yrs |
| Virginia | 13.0¢ | 1,300 | None | 10–13 yrs |
| Texas | 12.9¢ | 1,450 | None statewide | 10–13 yrs |
| Georgia | 12.0¢ | 1,350 | None | 11–14 yrs |
How solar payback works
Solar payback is calculated by dividing your net system cost (gross cost minus all incentives) by your annual electricity savings. A 10 kW system at $3.00/watt costs $30,000 gross. After the 30% federal ITC ($9,000), net cost is $21,000. In Florida at 13.8¢/kWh with 1,400 kWh/kW/yr of production, the system generates 14,000 kWh/year, saving roughly $1,932/year. Payback: $21,000 ÷ $1,932 = 10.9 years.
After payback, the remaining system life (typically 25–30 years total, 0.5%/yr degradation) is pure savings. A system with a 10-year payback on a 25-year panel warranty produces 15 more years of free electricity — typically $25,000–$50,000 in total savings depending on rate.
Financing: cash vs solar loan
Cash purchase produces the fastest payback and highest total savings — you own the full ITC, no interest cost. The 30% federal credit alone cuts payback by roughly 3 years compared to a pre-ITC benchmark.
Solar loans typically carry 5–10% interest rates. Monthly loan payments often roughly equal or exceed monthly electricity savings in early years, becoming cash-flow positive once the loan is paid off. A $21,000 loan at 6.99% over 12 years = $229/month payment; if your savings are $175/month, you're net negative $54/month during the loan term. After loan payoff: +$175/month free and clear. Total 25-year economics remain strongly positive despite the short-term negative cash flow.
Frequently Asked Questions
How long does solar take to pay back in 2026?
The average solar payback period in 2026 is 7–12 years for a cash purchase after the 30% federal ITC. High-electricity-cost states like California (7–10 years), Massachusetts (6–8 years), and Hawaii (4–6 years) pay back faster. Low-rate states like Texas (10–13 years) and Georgia (11–14 years) take longer. Battery storage extends payback by 4–8 years but increases self-consumption in states with unfavorable export rates.
What is the 2026 federal solar tax credit?
The federal Investment Tax Credit (ITC) is 30% of the total system cost for residential solar installations placed in service through December 31, 2032. It steps down to 26% in 2033 and 22% in 2034. A $25,000 system earns a $7,500 tax credit applied dollar-for-dollar against federal income tax owed. If your credit exceeds your tax liability, the unused portion carries forward to future tax years.
Is solar worth it in California after NEM 3.0?
Solar remains worthwhile in California after NEM 3.0, but payback extended from ~6 years to ~9–12 years. The critical change: export credit rates dropped ~75%, making self-consumption far more valuable than selling excess power. Battery storage (which earns the same 30% ITC) substantially improves the economics by shifting excess daytime production to peak evening hours. Most California homeowners with high bills and battery storage still clear 8–10 year payback.
Can I get both federal and state solar incentives?
Yes — federal ITC and most state credits can be stacked. Notable examples: North Carolina's 35% state credit (capped at $10,500) + 30% federal ITC; Arizona's 25% state credit (capped at $1,000) + 30% federal; Hawaii's 35% state credit + 30% federal. Some utility rebates must be subtracted from the system cost before calculating the federal ITC — confirm with your installer. DSIRE.org is the authoritative database of all state and utility incentives.
Does solar increase home value?
Yes — Lawrence Berkeley National Laboratory (LBL) research finds solar adds approximately $4/watt to home resale value at the time of sale, for systems that are owned (not leased). A 10 kW system adds roughly $40,000 to sale price on average. This value varies significantly by market: strong in California, New York, and the Northeast; more modest in lower-electricity-cost markets. Leased systems typically do not add value and can complicate the sale.
What happens to solar panels when you sell your house?
Owned systems transfer with the home and typically increase the sale price. Financed systems (loans) can either be paid off at closing or transferred to the new owner if they qualify. Leased systems or PPAs require the buyer to assume the contract — some buyers decline, which can complicate or delay the sale. For this reason, solar loans and cash purchases are generally preferred over leases for homeowners who may sell within the panel's lifetime.
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