Does Rooftop Solar Pay Off in 2026? An Honest ROI Analysis

The Honest Answer: It Depends on Where You Live

Rooftop solar still pays off in 2026 in high-rate states, but more slowly than it did: the 30% federal Residential Clean Energy Credit (Section 25D) ended for systems installed after December 31, 2025, so an $18,000, 6kW system making 7,500 kWh a year now takes about 15 years to pay back at $0.16/kWh, versus about 10.5 years with the credit, and about 13 years at the 2026 US average of about $0.18/kWh. At Massachusetts rates (about $0.30/kWh) payback is about 8 years; in Washington, where rates are about $0.14 and the climate is cloudy, it is about 19. The difference comes down to electricity rates, net metering policy and installation cost, so run the math for your own situation.

What happened to the 30% federal tax credit?

The budget law signed July 4, 2025 (Public Law 119-21) ended the Residential Clean Energy Credit for expenditures made after December 31, 2025. The IRS guidance treats the expenditure as made when installation is completed, so a system finished in 2026 does not qualify even if it was contracted earlier. Systems installed by the end of 2025 can still claim the credit on 2025 returns. Solar leases and power purchase agreements are owned by a company, which may be able to claim a separate business credit for a limited time and reflect it in pricing; ask any installer to show the numbers with and without it. State incentives and utility programs are unaffected.

The Base Case: A 6kW System Without the Credit

Take a 6kW system in a state where electricity costs about $0.16/kWh, such as Colorado, Texas or Florida (about $0.15 to $0.17 from January to July 2026, per EIA). Installed cost: $18,000, which is $3.00 per watt, Berkeley Lab's 2025 median for cash purchases (the median across all purchases was $3.60), with no federal credit. The system produces 7,500 kWh per year, the electricity rate is $0.16/kWh, and the utility offers retail net metering.

Annual savings: 7,500 kWh x $0.16 = $1,200. Payback: $18,000 / $1,200 = 15 years. Over 25 years, assuming 2% annual rate increases and 0.5% annual panel degradation, cumulative savings come to about $36,000, or about $18,000 net of the system cost. The system produces about 176,700 kWh over 25 years, so its lifetime cost is roughly $0.10/kWh (18,000 / 176,700), against a grid rate of about $0.26/kWh by year 25 at 2% annual increases.

With the old 30% credit the same system cost $12,600 net, paid back in 10.5 years and worked out to about $0.07/kWh. That gap is the main change for 2026 buyers. At the US average residential rate of about $0.18/kWh (EIA, January to July 2026) the same system saves about $1,350 a year and pays back in about 13 years.

Where Solar Makes Strong Financial Sense

The state figures below are rough estimates without the federal credit. Actual results depend on your usage, roof, installer pricing and utility rules.

Massachusetts

Residential electricity averaged about $0.30/kWh from January to July 2026 (EIA), among the highest in the continental US, net metering is strong, the state offers a 15% income tax credit up to $1,000, and the SMART program pays additional per-kWh incentives. At that rate the base-case system saves about $2,260 a year, so payback is about 8 years before SMART payments, and 25-year savings come to about $68,000 on the same 2% rate-growth and 0.5% degradation assumptions.

California

California's residential rates averaged about $0.33/kWh from January to July 2026 (EIA), and many PG&E and SCE customers pay more, which creates strong savings potential. But NEM 3.0 (for systems applying to interconnect after April 14, 2023) credits exports at Avoided Cost Calculator values that are far below retail rates on average, pushing the economics toward battery storage and daytime self-consumption. Payback depends heavily on your rate plan and how much of your solar you use yourself, so ask installers to model your actual usage under NEM 3.0.

New Jersey

Retail-rate net metering and rates of about $0.24/kWh (EIA, January to July 2026, up from about $0.22 a year earlier) give rate savings of about $1,800 a year on the base-case system, a 10-year payback on rate savings alone. New Jersey's Successor Solar Incentive (SuSI) program adds a fixed payment for each megawatt-hour generated for 15 years: $77 per megawatt-hour for net-metered homes that apply on or after July 27, 2026, or about $580 a year on 7,500 kWh, which brings payback to about 7.5 years.

Arizona

Abundant sun, rates of about $0.15/kWh (EIA) and a 25% state income tax credit up to $1,000 make Arizona solid. PVWatts puts a 6kW roof system in Phoenix at about 10,500 kWh a year, worth about $1,620 at the retail rate, so payback after the state credit is about 10.5 years if you use all of it yourself. Exports are credited below retail, so expect roughly 10-13 years, with daytime air-conditioning load keeping self-consumption high.

Where Solar Is a Weaker Investment

Washington State

Hydroelectric power keeps Washington rates below the national average: about $0.14/kWh from January to July 2026 (EIA), and there is no state income tax to credit against. Western Washington is also cloudy: PVWatts puts a roof system in Seattle at about 1,090 kWh per kW a year, so a 6kW system makes about 6,500 kWh, worth about $940 a year. Payback runs about 19 years ($18,000 / $940), and 25-year gross savings of about $28,000 leave a net gain of about $10,000.

Louisiana and Oklahoma

Rates of about $0.13-$0.14/kWh (EIA, January to July 2026) and weak state incentives mean the base-case system saves about $1,000 a year, a payback of about 18 years without the federal credit. Solar may still come out ahead over 25 years, but the capital may do better elsewhere.

States Moving Away From Net Metering

Hawaii, California (NEM 3.0) and increasingly Arizona and Nevada are moving from retail-rate net metering to lower export rates for power sent to the grid. That shifts the economics toward self-consumption and battery storage, which adds cost.

Home Value: The Often-Overlooked Return

A Lawrence Berkeley National Laboratory study of about 22,800 home sales (2002-2013) found buyers paid a premium of roughly $4 per watt of installed solar, about $15,000 for the average 3.6kW system in the study. The premium varies by market and is largest where electricity is expensive. Many states also exempt the added solar value from property tax assessment. Berkeley Lab itself cautions that premiums are likely smaller now that installed prices have fallen. This return is real even if you move before the system pays back through savings, but it applies to owned systems; leased systems and PPAs can complicate a sale.

When NOT to Install Rooftop Solar

• You are moving within 5 years: the home value premium may not cover the installed cost, especially without the federal credit.
• Your roof is old: a roof with under 10 years of life left should be replaced first, because removing and reinstalling panels later adds cost; budget the new roof into the project.
• Significant shading: trees or structures that shade the roof for hours a day can cut production sharply. Get a shading analysis.
• Your electricity rate is below $0.12/kWh: paybacks stretch past 20 years without the federal credit.
• High-pressure sales tactics: the federal homeowner credit has already ended, so there is no tax deadline to rush for. Get competing quotes, and be wary of any pitch that still promises a 30% federal credit on a 2026 installation you buy outright.

The Long-Term Math

On this article's assumptions (7,500 kWh a year, 2% annual rate growth), 25-year savings run from about $36,000 at $0.16/kWh to about $68,000 at Massachusetts rates, more for larger systems, plus any home value premium. Without the federal credit, the lifetime cost of solar electricity works out to roughly $0.08-$0.12/kWh for typical installs, still below projected grid rates in most states. For most homeowners in high-rate states solar still saves money; the question is whether a 10-15 year payback beats other uses of the capital. For upfront costs, see How Much Do Solar Panels Cost in 2026, and for export rules in your state, Net Metering in 2026. If you only need backup power rather than bill savings, a portable power station is a far smaller investment; see our home backup rankings.

Before signing, read why people get rid of solar panels: the roof, lease and loan problems that turn a good system into a regret.