What Solar Incentives and Rebates Are Available in Washington State?
Going solar in Washington State can cost less than you think — and not just because of falling panel prices. The state offers several financial incentives that can significantly reduce your upfront costs and ongoing expenses. This guide breaks down what's available, who qualifies, and how to make the most of every dollar.
The Federal Solar Tax Credit Still Applies in Washington
Before diving into state-level programs, it's worth noting that Washington homeowners can still take advantage of the federal Residential Clean Energy Credit. As of 2025, this credit covers 30% of your total solar installation cost, including panels, inverters, batteries, and labor.
This is a dollar-for-dollar reduction in what you owe the IRS — not just a deduction. For example, if your system costs $20,000, you could receive a $6,000 credit on your federal taxes. You must have enough federal tax liability to use it, though unused credits can roll over to future tax years.
Washington's Sales Tax Exemption for Solar
One of the most straightforward incentives Washington offers is a sales and use tax exemption on solar energy systems. Under state law, the purchase and installation of solar panels and equipment for residential use are exempt from Washington's retail sales tax.
Washington's state sales tax rate is 6.5%, and combined with local rates, many areas see 8–10% total sales tax. On a $20,000 system, that exemption could save you $1,300–$2,000 at the point of purchase — automatically, with no application required.
Always confirm with your installer that they are applying the exemption correctly at the time of purchase.
Property Tax Exemption for Solar Installations
Adding solar panels increases the value of your home. Normally, that would mean a higher property tax bill. Washington prevents this with a property tax exemption for solar energy systems.
Under Washington law, the added value from a solar installation is not included in your home's assessed value for property tax purposes. This exemption applies to systems used primarily for on-site consumption. There is currently no expiration date written into the statute, but confirm the current status with your county assessor or a local installer.
This benefit quietly saves you money every year without any paperwork on your part after installation.
Utility Net Metering Programs
Washington requires most investor-owned utilities and many public utility districts (PUDs) to offer net metering to residential solar customers. Net metering lets you send excess electricity your panels generate back to the grid in exchange for bill credits.
When your system produces more than you use — common on sunny summer days — those credits offset your electricity costs during evenings or cloudy months. The specific credit rate and program rules vary by utility, so contact your provider directly to understand:
- The compensation rate per kilowatt-hour (kWh)
- Any monthly or annual caps on credits
- How unused credits are handled at year-end
Major utilities like Puget Sound Energy (PSE) and Pacific Power offer net metering programs. If you're served by a PUD or co-op, check their individual policies.
Utility and Local Rebate Programs
Some Washington utilities offer direct rebates for solar installations or battery storage add-ons. These programs change frequently based on funding availability.
- Puget Sound Energy has periodically offered rebates for battery storage paired with solar. Check their current promotions.
- Snohomish County PUD, Clark Public Utilities, and others have offered incentives in the past — availability varies by year and budget.
- Some municipalities also offer small grants or low-interest green energy loans.
Because utility programs shift often, the best way to find current local rebates is to ask your installer or connect with a solar advisor through our free intake tool.
Community Solar Options
Not every home is a good candidate for rooftop panels — maybe you rent, have too much shade, or have a roof that needs replacement. Washington supports community solar programs that let residents subscribe to a share of an off-site solar array and receive bill credits.
Washington passed legislation expanding community solar access, with programs administered through qualifying utilities. Participation limits and credit structures vary by utility and program year. This is worth exploring if traditional rooftop solar isn't a fit for your home.
Frequently Asked Questions
Does Washington State offer a state income tax credit for solar?
No. Washington does not have a state income tax, so there is no state-level solar income tax credit. However, the federal 30% tax credit still applies to Washington residents, and the sales tax and property tax exemptions provide meaningful savings.
How long does it take to break even on solar in Washington?
Payback periods depend on your system size, energy usage, local utility rates, and which incentives you claim. With the federal credit, sales tax exemption, and net metering, many Washington homeowners see payback periods in the 8–12 year range — though your specific situation will vary. A qualified installer can run a customized estimate.
Do I need to apply for the sales tax exemption separately?
No. Your installer should apply the sales tax exemption at the time of purchase. You don't file a separate application. However, it's smart to confirm this in writing before signing a contract.
Can I combine multiple incentives?
Yes. Washington's incentives are designed to stack. You can claim the federal tax credit, the sales tax exemption, the property tax exemption, and utility net metering credits all on the same system. Some utility rebates may also be combined, though confirm specifics with your utility.
Are solar incentives available for renters in Washington?
Most incentives apply to property owners. Renters may be able to participate in community solar programs and receive bill credits without owning panels. Check with your utility for available community solar subscriptions.
Washington's combination of state tax exemptions, federal credits, and net metering makes solar a strong financial move for many homeowners — but every property and tax situation is different. The best first step is understanding what you specifically qualify for.
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