Washington Solar Incentives & Tax Credits (2026)
Updated 2026-07-07 · MySunROI Research
Washington homeowners can stack the 30% federal Investment Tax Credit with state and utility programs. A typical 6 kW system in Washington costs $18,480 before incentives and about $12,940 after the federal credit.
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Federal solar tax credit in 2026
The residential ITC remains 30% through 2032 for systems you own (purchase or loan). On a $18,480 install in Washington, that is roughly $5,544 in tax credit value.
Leases and PPAs do not qualify — the installer keeps incentives. See our full ITC guide for claiming steps.
Washington state & local incentives
Washington homeowners may qualify for the 30% federal ITC plus any active state or utility rebates. Verify current programs at dsireusa.org before signing a contract.
- Compare at least three installer quotes in Washington
- Model payback using your actual utility rate and usage
- Ask whether net metering or buyback rates apply in your utility territory
- Confirm ITC eligibility with a tax professional
Property tax & sales tax exemptions
Many states exempt solar equipment from property tax increases. Washington install costs average $3.08/W with estimated 15.8-year payback on a 6 kW system — above US national averages.
Verify current programs at dsireusa.org and your utility before signing — Washington rules change.
Washington quick stats
- 6 kW after ITC
- $12,940
- Payback
- 15.8 years
- Electric rate
- 11¢/kWh
- Annual savings
- $820
Frequently Asked Questions
Does Washington have a state solar tax credit?
Washington homeowners may qualify for the 30% federal ITC plus any active state or utility rebates. Verify current programs at dsireusa.org before signing a contract.…
Can I combine federal and state incentives?
Yes — federal ITC stacks with most state rebates and utility incentives when you own the system.
Do batteries qualify?
Paired storage typically qualifies for the 30% ITC when charged by solar. See our battery cost guide.
Related pages
How We Calculate Solar Costs
MySunROI estimates combine NREL residential PV installed-price benchmarks, EIA state electricity rates, and regional labor modifiers — updated 2026-07-07.
Estimates only — not tax or financial advice. Estimates based on NREL PV cost benchmarks, EIA electricity rates, and 2026 installer pricing surveys.