Washington Sales Tax: Rates, Rules, and How to Calculate It (2026)
Washington has no state income tax, but compensates with a robust sales tax system. The 6.5% base rate climbs to 10.6% in some localities—a significant swing that directly impacts your bottom line. With 743 taxing jurisdictions, you need precision to get the rate right.
| Statewide base rate | 6.5% |
|---|---|
| Typical combined rate | 6.5%–10.6% |
| Are groceries taxed? | Exempt |
| Economic nexus threshold | ≈$100,000/yr (verify) |
| Taxing jurisdictions tracked | 743 |
| Get the exact rate | Look up any Washington ZIP or address instantly |
How much is sales tax in Washington?
Washington's state sales tax starts at 6.5%, but local authorities add their own taxes on top. The combined rate ranges from 6.5% to 10.6%, averaging 8.98% statewide across 743 taxing jurisdictions. Edmonds edges toward the high end at 10.6%, showing how much local rates matter.
A 4% difference between the lowest and highest combined rates sounds small until you're calculating tax on thousands of dollars in sales. ZIP codes alone won't tell you the rate—you need the actual delivery address run through a lookup. That's what makes Sefro's address-level API essential for Washington retailers.
What's taxed and what's exempt in Washington
Groceries are exempt from Washington sales tax, easing the burden on grocers and families. Clothing is taxable, however, so you'll be collecting tax on apparel sales. The grocery exemption is one of the few breaks Washington gives shoppers.
SaaS and software subscriptions are fully taxable in Washington. Prescription medicines are exempt. Prepared food and restaurant meals are taxable too—if you're ordering takeout or eating at a restaurant, the combined sales tax applies to the full bill.
Do you have to collect Washington sales tax? (Economic nexus)
Like most states after the 2018 Wayfair decision, Washington requires out-of-state sellers to register and collect once their sales into the state cross an economic-nexus threshold. That line is commonly around $100,000 of sales into Washington per year, and some states also count a number of separate transactions — but the exact figure, and whether the transaction count still applies, change from time to time. Confirm Washington's current threshold before you rely on it.
If you sell into Washington from out of state, the practical question is whether you've crossed that line. Watching your sales into each state is how you know when you're on the hook — and it's the kind of thing that's easy to miss until a notice shows up.
Nexus rules change often and vary by state (reviewed 2026-01-01). This is general information, not tax advice — confirm your obligations with the Washington Department of Revenue or a tax professional.
How to calculate Washington sales tax
The math itself is simple: multiply the taxable price by the combined rate for the buyer's location. A $100 order at 8.984% means about $8.98 in tax. The hard part is getting the right rate for every address, keeping it current as rates change, and doing it fast enough to run inside a checkout.
That's what Sefro does. One API call returns the combined state, county, city, and special-district rate for any US address, sourced from state Departments of Revenue and refreshed weekly. You can also calculate the full tax on an order, validate addresses, and pull return-ready reports. See how the data is sourced or pricing to start.
Look up the Washington sales tax rate for any ZIP
Enter a Washington ZIP code to see the live combined rate from the Sefro API.
Frequently asked questions
What is the sales tax rate in Washington?
What is the sales tax rate in Washington? Washington's state rate is 6.5%, but combined with local taxes, rates range from 6.5% to 10.6% depending on your location. The statewide average is 8.98%.
Are groceries taxed in Washington?
Are groceries taxed in Washington? No, groceries are exempt from sales tax in Washington. Food purchased for home consumption won't have sales tax added.
Do I have to collect Washington sales tax if I sell online?
Once your sales into Washington cross its economic-nexus threshold — commonly around $100,000 a year, sometimes with a transaction count — you generally must register and collect. Because states adjust these rules, check Washington's current figure before relying on it.
How do I find the exact rate for a Washington address?
How do I find the exact rate for a Washington address? Use a tax lookup tool and enter the full delivery address. Sefro's API returns the exact combined rate for any Washington location, so you'll always charge the right amount.
Is SaaS or digital software taxable in Washington?
Is SaaS or digital software taxable in Washington? Yes, SaaS is taxable in Washington. Software subscriptions and digital services are subject to the full local sales tax rate.
Does Washington have local sales taxes on top of the state rate?
Does Washington have local sales taxes on top of the state rate? Yes, Washington has significant local sales taxes. The 6.5% state rate is just the starting point—cities and counties add their own rates, pushing combined rates as high as 10.6% in some areas.
Handle Washington sales tax with one API call
Skip the rate tables and district lookups. Sefro returns the exact combined rate for any Washington address in one request — start with a free trial.
Rates and rules on this page are provided for general information only and are not tax or legal advice. Rates change; confirm the current rate and your filing obligations with the Washington Department of Revenue or a qualified professional. See our Terms.