How long does it take for solar panels to pay for themselves?

6–10 years depending on state, rate, size, and incentives. With 30% ITC and net metering, many break even within 7 years.

What is the federal solar ITC in 2026?

30% through 2032 under the Inflation Reduction Act.

Does net metering affect payback?

Yes. 1:1 retail net metering shortens payback by 2–4 years vs avoided-cost states.

Is solar worth it in 2026?

For most US homeowners, yes. Median payback is 8.4 years with lifetime savings exceeding $40,000.

What is a good Solar Score?

Excellent: under 7 yrs. Good: 7–10. Fair: 10–14. Poor: over 14.

How much do panels save over 25 years?

$38,000–$72,000 depending on rate and inflation.

Cash vs loan vs lease?

Cash: fastest payback. Loan: keeps ITC. Lease: no upfront but lowest savings.

Does solar increase home value?

Yes, ~$4/watt per LBNL. 8 kW = ~$32,000 added value.

How much CO2 does solar offset?

~10,000–12,000 lbs/year for 8 kW, equal to planting 150 trees.

When will panels get cheaper?

Prices drop 5–8%/year but ITC steps down after 2032. 2026 is often optimal.

How Many Years Until Solar Panels Pay for Themselves?

Enter your system size, cost, and state to instantly calculate your solar payback period, 25-year savings, and ROI. Uses 2026 rates, 30% federal ITC, state incentives, and real net-metering rules.

★★★★★ 4.8/5 from 456 reviews

"Most homeowners overestimate solar costs and underestimate savings. An 8 kW system in a net-metering state typically pays for itself in under 9 years — then generates free electricity for 16+ more."
— Iris Halverson, PE, Senior Solar Energy Engineer • Reviewed: April 2026 • Updated quarterly

Calculate Your Solar Payback Period

Your Solar Details

State

System Size (kW)

Gross Installation Cost ($)

Electricity Rate ($/kWh)

Payment Method

CashLoanLease

Your Results

Net Cost (after incentives): $16,800

Est. Annual Savings: $1,920

Payback Period: 8.8 years

25-Year Savings: $65,280

ROI: 289%

CO₂ Offset (lbs/year): 10,400

Solar Score:Good

0 yrs25 yrs

8.8

Yes, solar is worth it!

8.4

Median payback years (cash)

19,200 PrismLife calculations

$42,000

Avg. 25-year net savings

2.5% annual inflation

10,400

Avg. lbs CO₂ offset/year

EPA eGRID factors

Sources: DSIRE • NREL PVWatts • EIA • IRS Form 5695

Calculator Methodology & Data Sources

Federal ITC: 30% of gross cost (IRC §25D). Cash/loan only.
Electricity Rates: EIA state averages, 2.5%/yr escalation.
Production: System kW × state-specific kWh/kW/yr (NREL PVWatts).
Net Metering: Retail=100%, Avoided=50%, None=70% self-consumption.
Loan: 6.5% APR, 20-yr. ITC still applies.
Lease: $0 up, 80% of monthly savings. No ITC to homeowner.
CO₂: EPA eGRID 0.855 lbs/kWh.
25-Year Savings: Cumulative with 2.5% rate escalation, 0.5%/yr panel degradation.

Iris Halverson, PE

Senior Solar Energy Engineer, 12+ years in residential PV design and financial modeling. Stanford-educated, licensed PE. Reviewed 5,000+ installations.

Reviewer: Theo Marchetti, CFA

How Many Years Until Solar Panels Pay for Themselves?

Calculate Your Solar Payback Period

Your Solar Details

Your Results

Frequently Asked Questions

Iris Halverson, PE

Solar Payback by State — 2026