Washington makes sales tax harder than most states. It layers a 6.5% state rate, local rates, destination-based sourcing, and a gross-receipts tax onto every sale. Rates change four times a year, so a number that was right last quarter can be wrong today.
This guide explains what you owe, when you collect, and how to file, using current rules from the Washington Department of Revenue (DOR). Every rate below reflects Q3 2026.
What Is Washington State Sales Tax?
Washington sales tax is a retail sales tax that sellers collect on retail sales of tangible personal property, digital products, and certain services. DOR calls it the state’s principal tax source. Use tax is the complementary tax, charged at the same rate when sales tax was not paid at purchase.
Use tax also applies to a business’s own taxable purchases, such as equipment, furniture, and consumables, per DOR’s use tax page. Washington has no state income tax. Instead it levies a gross-receipts Business & Occupation (B&O) tax on business income, filed on the same combined excise tax return as sales tax.
What Is the Sales Tax Rate in Washington?
Washington’s state sales tax rate is 6.5%, per DOR. Local city and county rates add up to 4.20% on top. That pushes the combined rate to 10.70% in the highest jurisdiction, Edmonds, for Q3 2026 (July 1 to September 30), per DOR’s rate table. The lowest combined rate is 7.70%.
Rates reset quarterly, on January 1, April 1, July 1, and October 1, so hardcoded rates go stale. DOR provides a Tax Rate Lookup Tool and a free mobile app to find the rate and location code for any address. You can also use Commenda’s sales tax calculator to look up the current rate for any US address.
What Are Washington Sales Tax Rates by City?
Combined rates in major Washington cities run from about 8.60% to 10.70% for Q3 2026, depending on local add-ons, per DOR’s rate table. The table below shows current combined rates. Verify any specific address with DOR’s lookup tool before you charge, since rates change every quarter.
| City | Combined rate (Q3 2026) | Source |
|---|---|---|
| Seattle | 10.55% | DOR rate table |
| Bellevue | 10.30% | DOR rate table, Q3 2026 |
| Tacoma | 10.50% | DOR rate table, Q3 2026 |
| Spokane | 9.10% | DOR rate table, Q3 2026 |
| Vancouver | 8.90% | DOR rate table, Q3 2026 |
| Olympia | 10.00% | DOR rate table, Q3 2026 |
| Everett | 9.90% | DOR rate table, Q3 2026 |
| Edmonds | 10.70% | DOR rate table, Q3 2026 |
| Bellingham | 9.20% | DOR rate table, Q3 2026 |
| Kent | 10.40% | DOR rate table, Q3 2026 |
| Renton | 10.50% | DOR rate table, Q3 2026 |
| Redmond | 10.40% | DOR rate table, Q3 2026 |
| Kirkland | 10.40% | DOR rate table, Q3 2026 |
| Auburn | 10.50% | DOR rate table, Q3 2026 |
| Yakima | 8.60% | DOR rate table, Q3 2026 |
How Does Washington’s Destination-Based Sales Tax Work?
Washington sources sales to where the customer receives the goods or service, not where the seller sits, per DOR. The delivery address sets which local rate applies. Washington has used destination-based sourcing since July 1, 2008 under RCW 82.32.730. Over-the-counter storefront sales are taxed at the store’s location.
Nexus and sourcing are separate concepts. Nexus decides whether you collect at all. Destination sourcing decides which rate you charge once you do. Washington returns also report tax by location code, not just by rate. DOR publishes downloadable location code tables and a database conversion service that maps a list of customer addresses to codes.
What Is Taxable in Washington?
Tangible personal property, many digital products, and certain retail services are taxable in Washington, per DOR’s retail sales tax page. Tangible personal property is anything that can be seen, weighed, measured, felt, or touched. Taxable retail services include installing, cleaning, decorating, repairing, or altering property, plus construction and car washing.
DOR’s rule for digital products is simple: if a product is taxable in tangible form, it is generally taxable in digital form too. Taxable examples named by DOR include music files, audiobooks, and e-books.
Do SaaS Companies Pay Washington Sales Tax?
Yes. Software as a Service (SaaS) is generally taxable in Washington. The state taxes remote access software (RAS) and digital automated services (DAS) sold to end users, per DOR. Treatment can differ for resale and for some business-use and category-specific exclusions, so check DOR’s digital products guidance before assuming a blanket rate.
SaaS revenue also counts toward the $100,000 economic nexus threshold. A SaaS seller with no Washington office still registers once its Washington-sourced sales cross that line.
What Is Exempt from Washington Sales Tax?
Two things can be exempt: the goods and the customer. Common exempt goods include most groceries, prescription drugs, certain medical devices, farm equipment, and newspapers, per DOR. Sales to exempt customers are also exempt: resellers, qualifying nonprofits, and government entities. The seller must collect and keep a valid resale or exemption certificate for each exempt sale.
Washington no longer gives a point-of-sale exemption to nonresidents. Residents of no-sales-tax states like Oregon now request a remittance refund from DOR after purchase, per DOR’s exemption rules, rather than skipping tax at checkout.
When Do You Need to Collect Sales Tax in Washington? (Nexus)
You must collect once you have nexus. Physical nexus comes from employees, a store, an office, a warehouse, or inventory in Washington. Economic nexus is $100,000 in cumulative gross receipts sourced to Washington in the current or prior calendar year, per DOR. Register before your first taxable sale once you cross either trigger.
Washington eliminated its 200-transaction threshold on March 14, 2019, per DOR. The standard today is the $100,000 gross-receipts figure only, with no transaction count. Economic nexus triggers both sales tax collection and B&O tax. For thresholds in every state, see Commenda’s US economic nexus guide.
What Are Washington’s Sales Tax Rules for Out-of-State Sellers?
Remote sellers with no physical presence must register and collect once they pass $100,000 in Washington-sourced gross receipts in the current or prior calendar year, per DOR. They charge the rate at the customer’s delivery address under destination-based sourcing. The threshold counts sales sourced to Washington, not company-wide revenue, which is a common point of confusion.
Do Amazon FBA Sellers Need to Collect Washington Sales Tax?
Usually not on marketplace sales. Under Washington’s Marketplace Fairness law and RCW 82.08.0531, marketplace facilitators like Amazon, Etsy, Walmart, and eBay must collect and remit sales tax for third-party sellers, effective October 1, 2018. So Amazon collects on Fulfillment by Amazon (FBA) marketplace sales.
You still have obligations. You register, pay B&O tax on your Washington sales, and collect tax on non-marketplace channels such as your own website. Inventory stored in a Washington warehouse creates physical nexus. Find it using the Inventory Event Detail Report in Amazon Seller Central.
How Do You Register for a Washington Seller’s Permit?
Register through the Business Licensing Service on DOR’s My DOR portal before your first Washington sale. Washington bundles sales tax registration into a general business license, so a “seller’s permit” maps to the state Business License Application. You receive a Unified Business Identifier (UBI) number once approved.
- Get an Employer Identification Number (EIN) from the IRS, or use your Social Security Number if you are a sole proprietor.
- Create a My DOR account.
- File the Business License Application through the Business Licensing Service, including your business activities and North American Industry Classification System (NAICS) code.
- Pay the $50 application processing fee (additional endorsement fees may apply), per DOR.
- Watch for your UBI number and letter ID, then link your business and excise licenses in My DOR.
Businesses dealing in tobacco, alcohol, or fuel may need additional permits. Some Washington cities also require their own local business license.
How Do You File and Pay Washington Sales Tax Returns?
File the combined excise tax return through My DOR on the frequency DOR assigns: monthly, quarterly, or annual. Report tax by location code. Higher tax liability means more frequent filing, and new registrants are often assigned monthly. File a no-business-activity return for any period with zero sales.
| Frequency | Due date | Source |
|---|---|---|
| Monthly | 25th of the following month | DOR 2026 due dates |
| Quarterly | Last day of the month after the quarter ends (Q1 2026 due April 30, 2026) | DOR 2026 due dates |
| Annual | April 15 of the following year (2026 return due April 15, 2027) | DOR 2026 due dates |
Washington requires most businesses to file and pay electronically. Accepted payment methods are listed below, per DOR.
| Payment method | Notes |
|---|---|
| ACH debit | DOR withdraws the amount owed on a date you select |
| ACH credit | You direct your bank to send payment for each return |
| E-check | Free one-time payment from your bank account |
| Credit card | Visa, Mastercard, American Express, or Discover; a processing fee applies |
What Are the Penalties for Late Filing in Washington?
Washington charges a late payment penalty that climbs with time: 9%, then 19%, then 29% of the tax due, per DOR. The minimum penalty is $5. Businesses required to pay electronically face an added 10% penalty if they do not, per DOR’s Electronic Payment Guide. Interest also accrues on unpaid tax.
| Trigger | Penalty | Source |
|---|---|---|
| Tax not paid by the due date | 9% | DOR late filing page |
| Still unpaid after the last day of the month following the due date | 19% | DOR late filing page |
| Still unpaid after the last day of the second month following the due date | 29% | DOR late filing page |
| Minimum penalty | $5 | DOR late filing page |
| Not paying electronically when required | +10% | DOR Electronic Payment Guide |
A 30-day filing extension is available in specific situations. See the FAQ below for the four qualifying reasons and how to request one.
How Should You Prepare for a Washington Sales Tax Audit?
DOR audits usually cover the last four years plus the current reporting period. Auditors reconcile your reported income, validate deductions and exemptions, and check whether sales or use tax was paid on business purchases such as assets and consumables. Preparation is mostly about clean records.
- Organize sales records, purchase invoices, returns, and payment receipts for the full audit period.
- Hold valid resale and exemption certificates for every exempt sale.
- Confirm use tax was paid on taxable business purchases, including equipment and consumables.
- Pay any assessed tax within 30 days, or file a formal appeal within 30 days.
How Commenda Helps With Washington Sales Tax
Washington’s quarterly rate changes, location-code reporting, and combined excise return make manual compliance a moving target. Commenda’s indirect tax software tracks your physical and economic nexus across states, calculates destination-based rates, and files your returns, with 100+ ERP, API, and custom integrations feeding it real transaction data.
Track your exposure state by state with Commenda’s US economic nexus guide, and look up any rate with the sales tax calculator (it looks up rates only and does not check nexus). Then book a demo to get a free Washington nexus exposure assessment.
