Washington Solar Incentives, Tax Credits & Rebates 2026
State-program snapshot: 2026-01 · Federal status reviewed: 2026-08-06Cost Context
An illustrative 14.5 kW system using the historical observed average cost in Washington is $52,345. New federal residential credit for a 2026 installation: $0. Modeled annual savings before financing: $1,896.
Federal Residential Credit Status
Residential Clean Energy Credit
Ended for new 2026 systems0% for property placed in service in 2026
IRS guidance states that the 30% credit applied to qualified residential clean-energy property installed from 2022 through December 31, 2025. It is not available for property placed in service after that date.
Eligibility
No new residential credit for a system first placed in service in 2026. A previously earned unused credit may be eligible for carryforward under IRS rules.
Primary source
IRS Residential Clean Energy Credit guidance ↗Washington State Program Snapshot
Net Metering
Net MeteringFull retail rate up to 100 kW
Net metering at full retail rate.
Sales Tax Exemption
tax_exemption100% sales tax exempt
Solar equipment is exempt from Washington state sales tax.
State and utility programs can change between reviews. Confirm eligibility, funding and deadlines with the administering agency or utility before relying on this snapshot.
Tax Exemptions
property tax Exemption
No specific property tax exemption for solar installations.
sales tax Exemption
Solar equipment is exempt from state sales tax.
Highlights & Drawbacks
Highlights
Drawbacks
State-program sources: DSIRE, state energy offices and utilities; snapshot dated 2026-01. Programs, funding and eligibility can change without notice. Federal residential status reviewed against IRS guidance on August 6, 2026.