Understanding Washington State Solar Incentives and Tax Credits

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The sunny potential of solar energy is increasing, particularly in Washington State, where numerous incentives and tax credits are stimulating the growth of this clean energy source. This comprehensive guide aims to clarify Washington State’s solar incentives and tax credits, shedding light on how homeowners and businesses can save on solar installations.

Federal Solar Investment Tax Credit (ITC)

Before diving into state-specific incentives, it’s worth noting the Federal Solar Investment Tax Credit (ITC). This federal tax credit applies across the United States and offers a 26% tax credit on the cost of solar panel systems installed before the end of 2023. For those considering solar panel installation, the ITC can significantly offset the initial cost.

Washington State Solar Incentives

1. Net Metering

Net metering is one of the key incentives available in Washington State. It enables homeowners and businesses to sell the excess electricity produced by their solar panels back to the utility company. The power that your solar panels produce but don’t use immediately is sent back to the grid, and the utility company gives you credit at the full retail rate. When your system isn’t producing enough power (like at night), you can use these credits instead of buying power from the utility company.

2. Sales and Use Tax Exemption

Washington State provides a sales and use tax exemption for solar energy systems up to 100 kilowatts (kW). This means that when you buy a solar energy system in Washington, you don’t have to pay the state’s sales tax, significantly reducing the upfront cost. This exemption is currently valid through June 30, 2029.

3. Solar Renewable Energy Certificates (SRECs)

While Washington does not have a state-wide SREC market, some utilities have individual programs that pay for each kilowatt-hour (kWh) of solar electricity generated. Check with your local utility company to see if they offer such a program.

4. Local Utility Rebates

Some local utility companies in Washington offer additional rebates for solar panel installations. For example, Snohomish County Public Utility District offers customers a rebate of $300 per kW of installed solar power. Make sure to check with your local utility company for any additional rebates.


Harnessing the power of the sun in Washington State is a wise choice, not only for the environmental benefits but also for the generous incentives and tax credits available. Understanding these incentives can make solar power an accessible and attractive investment for many homeowners and businesses in Washington. It’s the perfect time to explore the potential of solar energy and contribute to a sustainable, green future.

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