Washington Solar Incentives 2026: Net Metering & Tax Break

Reviewed by the SolarFY Editor using our data and methodology. Updated August 2026.

Washington is not a high-sun state, and its power is some of the cheapest in the country because of hydropower. That combination makes the Washington solar math different from a Sunbelt state: the payback here rests on incentives and net metering more than on raw sunshine or a high electric bill. The good news is that Washington offers a real upfront saver in the form of a sales-tax exemption, keeps full-retail net metering, and has no state income tax, so there is no state credit to lose. This page covers what Washington solar incentives look like in 2026, what your roof is likely to make, which utility serves you, and how to tell honestly whether solar is worth it for your home.

What solar costs in Washington, and what your roof makes

Washington has cheap power and limited sun, so the honest case for solar leans on incentives, not a high bill. Washington’s average residential electricity price is about 14.36 cents per kWh (EIA retail sales, residential Washington, as of April 2026), well below the national average of about 18.44 cents (EIA, US residential, as of May 2026). Cheap hydropower is why. Each kilowatt-hour your roof replaces is worth less here than in a high-rate state, so the incentives and rising future rates do more of the work in the payback.

Production is lower in the cloudy Northwest, and it is worth being honest about that. According to MySolarFY’s own analysis (as of August 2026), a 6 kW rooftop system in Seattle is modeled to produce about 6,527 kWh a year (NREL PVWatts v8 run, NSRDB typical-year data), which is meaningfully less than the same system in a sunnier state. The table below is our own computed estimate for that system, with the inputs shown so you can check it against your own roof.

Treat those figures as illustrative, not a guarantee: actual output and savings depend on your roof’s pitch, orientation, and shading, your usage, your rate plan, and your net-metering terms. Estimate your own roof with NREL’s free PVWatts calculator before you size a system.

Washington solar incentives at a glance

Washington’s value comes from a sales-tax exemption, full-retail net metering, and no state income tax, not from cash rebates or an SREC market. That exemption lowers your upfront cost, net metering pays you for exports, and there is no state income tax to owe. Here is what each one does in 2026 and the fine print worth knowing.

The sales-tax exemption is the headline, and it is a real upfront saver. Washington exempts 100% of the state and local sales and use tax on machinery, equipment, and installation labor for a solar energy system capable of generating at least 1 kW and no more than 100 kW AC, which covers essentially every home system (RCW 82.08.962; Washington Department of Revenue, verify current terms). Combined state and local sales tax in Washington often runs in the high single digits, so on a typical residential install this exemption is worth real money off the top. The exemption applies to qualifying purchases through December 31, 2029, and the statute is set to expire January 1, 2030 unless the legislature extends it, so it is worth confirming the current window before you sign.

Heads up on the federal change: the 30% federal Residential Clean Energy Credit (Section 25D) ended for expenditures made after December 31, 2025, under the One Big Beautiful Bill Act (IRS, as of January 2026), so a Washington homeowner who buys solar with cash or a loan in 2026 cannot claim it. There is no state credit to replace it because Washington has no state income tax. Confirm every figure against the linked source, and ask a tax professional about your own situation. MySolarFY does not provide tax advice.

Net metering in Washington, and the catch at year-end

Washington keeps full-retail 1:1 net metering, which is the biggest ongoing incentive here. Under state law, your utility credits the power you export to the grid against the power you pull back, kilowatt-hour for kilowatt-hour, at the full retail rate (RCW 80.60.030). When your panels make more than you use, the surplus banks as a credit you draw down later. That matters even more in the Northwest, where a system tends to overproduce in the long summer days and lean on banked credits through the dark, wet winter.

The catch is the annual reset. Credits roll over month to month, but any unused credit left on March 31 each year is granted to the utility with no cash payment to you (RCW 80.60.030). The practical takeaway is to size your system to your own yearly usage rather than to overbuild, so you use your credits instead of forfeiting them. Net metering is also subject to an aggregate program cap tied to each utility’s historical peak demand, so confirm your utility still has room under its cap and check its current interconnection rules before you commit. For the mechanics of how export credits work, see how net metering credits your solar exports, and for how the credit lowers your monthly cost, read how solar lowers your electricity bill.

Which Washington utility serves you, and how it credits solar

Your utility sets your rate, your net-metering true-up, and your interconnection paperwork, and Washington leans heavily on public and municipal utilities. The state has a mix of large investor-owned utilities, big city-owned utilities, and public utility districts (PUDs). Washington’s net-metering law applies across these, but the tariff details differ, so it matters who serves you.

Puget Sound Energy is the largest utility in the state and serves much of the Puget Sound region, so many Washington homeowners looking at solar are PSE customers. Seattle City Light serves the city and is one of the largest municipal utilities in the country, and Avista serves the Spokane area in the east. Public utility districts and co-ops set their own terms, so if one serves you, confirm its current net-metering policy and interconnection process before you commit. Enter your ZIP above and we match you with installers who know your specific utility’s rules.

How you pay decides which benefits you keep

Ownership decides who keeps the net-metering credits and the sales-tax exemption, and how you finance the system decides ownership. This is the most misunderstood part of a Washington solar quote.

If you own the system (cash or loan), you take the net-metering credits directly and the sales-tax exemption lowers your purchase price. If you lease or sign a power-purchase agreement, a third party owns the panels, you typically pay little or nothing up front, and the company that owns the system claims any commercial credit (Section 48E), not you. The 30% federal homeowner credit (Section 25D) ended for expenditures made after December 31, 2025, so it is not part of a 2026 purchase on any path. For a deeper payback comparison, see whether solar panels are worth it, and for the federal picture see what the federal solar tax credit change means in 2026. For programs in other states, browse our solar incentives overview.

Is solar worth it in Washington?

It can be, but the answer leans on incentives and time, not sunshine. Washington’s low electricity rates and limited sun mean a longer payback than in a sunny, high-rate state, and the loss of the federal homeowner credit in 2026 removes what used to be a big upfront cut. What still works in your favor is the sales-tax exemption that lowers the purchase price today, full-retail net metering that pays you for exports year-round, no state income tax, and electric rates that tend to rise over the 25-plus-year life of a system. If you own the roof, plan to stay a while, and size the system to your usage, the numbers can pencil out. If you are focused on the fastest possible payback, be realistic about the Northwest sun. For a checklist before you commit, see the right questions to ask a solar installer. MySolarFY matches you with licensed Washington installers so you can compare real local quotes side by side, with no obligation.

How to choose a solar installer in Washington

Screen any Washington installer against objective criteria rather than chasing a “best” list. The items below separate a solid local installer from a hard-sell operation:

• NABCEP certification, the industry’s professional standard for PV installers.
• A valid Washington electrical contractor license and the proper electrical and construction registration with Washington Labor and Industries.
• A clear workmanship and equipment warranty in writing.
• Real Washington experience and verifiable reviews, plus help with your utility’s net-metering and interconnection paperwork.
• A written production estimate and a transparent quote you can compare, with the sales-tax exemption already reflected.

Frequently asked questions

What solar incentives does Washington offer in 2026? Washington’s main incentives are a 100% state and local sales and use tax exemption on solar equipment and installation for systems from 1 to 100 kW AC (RCW 82.08.962, through December 31, 2029), and full-retail 1:1 net metering that credits your exported power at the retail rate (RCW 80.60.030). Washington has no state income tax, so there is no state solar tax credit. The 30% federal homeowner credit ended for expenditures made after December 31, 2025. Confirm current terms with each source before you sign.

Does Washington have net metering? Yes. Under RCW 80.60.030, Washington utilities credit residential rooftop solar exports at the full retail rate, kilowatt-hour for kilowatt-hour, and credits roll over month to month. The catch is that any unused credit left on March 31 each year is forfeited to the utility with no cash payment, so it is best to size a system to your own yearly usage. Net metering is also subject to an aggregate cap per utility, so verify your utility still has room and check its current tariff.

Is there a Washington state solar tax credit? No. Washington has no state personal income tax, so there is no state income-tax credit for solar. Instead, Washington’s upfront incentive is a 100% exemption from state and local sales and use tax on qualifying solar systems up to 100 kW AC under RCW 82.08.962, available through December 31, 2029. That exemption plus full-retail net metering carries the value here.

Is solar worth it in Washington with so little sun? It can be, but it leans on incentives more than sunshine. Production is lower in the cloudy Northwest, and Washington’s electricity rates are low because of hydropower, so the payback is longer than in a sunny, high-rate state. The sales-tax exemption, full-retail net metering, no state income tax, and rising future rates are what make the case. Owning the system, staying in the home for years, and sizing to your usage all improve the math. Model your own roof with NREL’s PVWatts calculator before you decide.

Who is my Washington utility, and does it credit solar? Many Washington homeowners are served by Puget Sound Energy (PSE), the largest utility in the state, followed by Seattle City Light in Seattle and Avista in the east around Spokane. Much of the rest of the state is served by public utility districts and co-ops such as Snohomish County PUD, Tacoma Power, and Clark PUD. State net-metering law applies across them, but tariff and interconnection details are set per utility, so confirm your specific utility’s current policy before you commit.

What happened to the federal solar tax credit in Washington? The 30% federal Residential Clean Energy Credit (Section 25D) ended for expenditures made after December 31, 2025, under the One Big Beautiful Bill Act, so a Washington homeowner who buys solar in 2026 with cash or a loan cannot claim it. A separate commercial credit (Section 48E) can apply to leased and PPA systems, but the business that owns the system claims it, not the homeowner. Washington’s sales-tax exemption and net metering were not affected.

Reviewed by the SolarFY Editor. Figures were verified against the linked Washington (RCW, Washington Department of Revenue), EIA, NREL, and IRS sources as of August 2026, following our data and methodology; the sales-tax exemption window and utility net-metering terms can change, so confirm current terms with each source and your utility before you decide. MySolarFY does not provide tax or financial advice; consult a licensed professional about your own situation. Learn more about the MySolarFY team and how we work, and browse more states from our solar by state hub.

MySolarFY is a free service that matches homeowners with licensed solar installers. We are not an installer, financing company, or government program. “No up-front cost” refers to qualifying lease or PPA financing, where eligible homeowners may have no out-of-pocket cost at installation. Lease and PPA terms typically run 20 to 25 years, may include an annual price escalator, and total payments may exceed the cost of a cash purchase. Homeowners do not get the federal residential credit that ended after December 31, 2025; on a leased system the company that owns it claims any commercial credit. Solar panels are not free and monthly payments apply. Eligibility, savings, incentives, and rates vary and are not guaranteed. See our full disclaimer.