Washington Sales Tax Guide: 6.5% State Rate, 7.6% to 10.7% Combined, Destination Sourcing and the New Service Taxes
Washington Sales Tax Guide: 6.5% State Rate, 7.6% to 10.7% Combined, Destination Sourcing and the New Service Taxes
Washington has no personal income tax on wages today (a 9.9 percent tax on income over $1 million starts January 1, 2028), so the sales tax carries a large share of state and local funding. If you sell goods to customers in Washington, or sell certain services as of October 1, 2025, you need to know which Washington sales tax rate applies, where to source it, and when you must register. This guide covers the rate structure for the fourth quarter of 2026, how destination sourcing works, which services are now taxable, and the steps to register.
Disclaimer: This guide is informational content, not legal or tax advice. Tax rules, rates and exclusions change. Confirm your situation with the Washington State Department of Revenue (DOR) or a qualified CPA or attorney before you act on anything here, especially if you sell across many cities or into other states.
How the Washington Sales Tax Rate Works
The Washington sales tax rate has two parts. The state rate is 6.5%, and it applies statewide. Cities, counties and transit areas add local sales and use taxes on top of it, so your combined rate depends on the address where the sale is delivered.
For the fourth quarter of 2026 (October 1 to December 31), combined rates run from 7.6% in unincorporated Klickitat County to 10.7% in Edmonds and Lynnwood. Selected rates for the quarter:
| Location | Combined rate, Q4 2026 |
|---|---|
| Edmonds and Lynnwood | 10.7% |
| Seattle | 10.55% |
| Tacoma | 10.5% |
| Spokane | 9.1% |
| Vancouver | 8.9% |
| Unincorporated Klickitat County | 7.6% |
If you find a source listing an older Washington sales tax rate range of 8% to 10.25%, it is out of date. Do not use it for pricing, invoicing or filing.
Rates change every quarter. The next change takes effect January 1, 2027. Rates can also differ across a city boundary or across a regional transit authority (RTA) or public transportation benefit area (PTBA) line, so two addresses on the same street can carry different totals. Do not rely on the city name alone. Look up each exact address with DOR's rate lookup tool at dor.wa.gov.
Here is what the math looks like. A $100 taxable sale delivered to Seattle at 10.55% carries $10.55 in tax, for a total of $110.55. A $200 taxable sale delivered to Spokane at 9.1% carries $18.20 in tax, for a total of $218.20. Those figures assume the sale is taxable, which depends on what you sell.
Destination Sourcing: Where the Sale Is Taxed
Washington uses destination sourcing. The rate is set by where the customer receives the goods or service, not by where your business is located or where the order was placed. If you ship a product from a warehouse in Vancouver to a customer in Spokane, the Spokane rate applies. If you are based in Seattle and deliver to a customer in unincorporated Klickitat County, the Klickitat County rate applies.
Destination sourcing has practical consequences:
- Your point-of-sale system, shopping cart or invoicing tool needs the delivery address, not just the billing address, to calculate the correct rate.
- Rates must be checked at the address level. Two customers in the same city can pay different totals if one sits on the other side of a boundary or an RTA or PTBA line.
- Because rates reset each quarter, set a routine to update your tax tables before January 1, 2027, and before each later quarter begins.
Sales Tax on Services in Washington
Historically, most services were not subject to the Washington sales tax. ESSB 5814 changed that. Beginning October 1, 2025, the following services became subject to sales tax:
- Information technology services
- Custom software and website development
- Security and investigation services
- Temporary staffing services
- Advertising services
- Live presentations (real-time workshops, webinars and courses), with exclusions such as schools and one-on-one tutoring
If you sell these services to Washington customers, the sales tax applies at the destination rate for the place where the customer receives the service. As an example, a $5,000 custom website project delivered to a customer in Tacoma at 10.5% would carry $525 in tax if the project is taxable. Whether a specific deliverable qualifies needs to be confirmed with DOR, because classification depends on what the customer actually receives.
The picture changes again over time. Some exclusions took effect July 1, 2026. Under ESSB 6346, most of these service taxes are repealed starting January 1, 2029. Advertising services are not part of that repeal. ESSB 6346 is also void if the new income tax is invalidated. Because the exclusions and the repeal date interact with that condition, confirm with DOR which services are taxable on the date of each sale before you set prices or file returns.
Who Has to Collect
Businesses based in Washington collect sales tax on taxable sales delivered to customers in the state. Out-of-state sellers are treated differently. Remote sellers and marketplaces must collect once their Washington receipts pass $100,000. Below that threshold, confirm your obligations with DOR before you assume you can skip collection, since the rules for marketplaces and remote sellers have specific mechanics you should verify directly.
If you sell through a third-party marketplace, the marketplace may collect and remit tax on your behalf for sales it facilitates. Check the marketplace's terms and confirm the arrangement with DOR, so you do not double collect or leave a gap.
Registering to Collect Sales Tax
Washington handles sales tax registration through the Business Licensing Service (BLS) inside DOR, not the Secretary of State. You need a Washington business license if you sell anything subject to sales tax. You also need one if you:
- Have gross income of $12,000 per year or more
- Plan to hire employees within 90 days
- Operate under a name other than your full legal name
- Owe any tax or fee to DOR
The steps, in order:
- Form your entity first if you need one. If you formed an LLC or corporation, file with the Secretary of State through the Corporations and Charities Filing System (CCFS) before you submit the business license application. Details are at sos.wa.gov/corporations-charities.
- Submit the Business License Application. Apply through DOR at dor.wa.gov/open-business/apply-business-license. The processing fee to open a business is $50, plus separate endorsement fees.
- Receive your UBI. The BLS issues the 9-digit Unified Business Identifier (UBI) that ties your registrations together.
- Add endorsements if needed. City and state endorsements can be requested in the same application.
- Confirm your reseller permit separately. If you buy inventory for resale, the reseller permit is issued separately from the business license, so do not assume your license covers it. Confirm the application process and any associated fee with DOR.
Timing matters. Online applications generally take about 10 business days. If city or state endorsements need approval, add 2 to 3 weeks. Mailed applications can take up to six weeks. Build that time into your launch schedule, and do not start collecting tax until your registration is in place.
Sales Tax Is Not the Same as B&O Tax
Washington has no corporate income tax and no personal income tax on wages. Instead, most businesses pay the business and occupation (B&O) tax, a gross receipts tax with more than 50 activity classifications. B&O has no deduction for labor, materials or other costs, so it applies to your gross revenue, not your profit.
Sales tax and B&O are separate obligations. Sales tax is collected from the customer and remitted on taxable sales. B&O is a tax on your business's receipts. Many cities also levy their own local B&O tax, and about 54 cities do so. DOR does not administer local B&O taxes, so check with your city separately after you register.
Common Mistakes to Avoid
- Using one rate for every customer. The rate depends on the delivery address, not your location.
- Relying on the 8% to 10.25% range. That figure is out of date.
- Ignoring service taxes. IT services, custom software, websites, security, temporary staffing and advertising may now be taxable, so review your service lines.
- Assuming the business license covers everything. The reseller permit is separate, and city B&O obligations are separate.
- Waiting for a quarter change to update rates. Rates change January 1, 2027, and every quarter after that.
Where to Confirm Your Numbers
Start with the Washington State Department of Revenue at dor.wa.gov. Use the rate lookup for each delivery address, submit your registration through the Business Licensing Service, and confirm the current status of service exclusions and reseller permit requirements directly with DOR. Rates and rules change, so treat this guide as a starting point rather than a final answer.
If you have multistate sales, a mix of taxable and exempt services, or a marketplace arrangement, a CPA or attorney who works with Washington sales tax can save you from costly filing errors. The cost of a one-time review is usually small compared with penalties and back tax on a mistake that repeats every quarter.