Washington Sales Tax Rate & Rules (2026)

Last updated: 2026-03-27

What is the sales tax rate in Washington?

What is taxable in Washington?

How do you register to collect sales tax in Washington?

What is the economic nexus threshold for Washington?

How to register for sales tax in Washington

Before you can collect sales tax, you need to register with the Washington Department of Revenue. Here is the step-by-step process.

1. Register online through the Washington Department of Revenue Business Licensing Service at bls.dor.wa.gov
2. Apply for a Business License with Sales Tax Endorsement — the state license is free
3. Provide your FEIN or SSN, business entity type, and Washington location details
4. Local business license fees may apply depending on your city/county
5. Washington is a member of the Streamlined Sales Tax (SST) — you can also register at sstregister.org

How to collect sales tax in Washington

Once registered, you are responsible for charging the correct amount of sales tax on every taxable transaction. Here is how the collection process works in Washington.

1. Determine taxability — Washington taxes most tangible goods, digital goods, SaaS, and many services
2. Look up the correct combined rate using the DOR's tax rate lookup tool — Washington has hundreds of rate combinations based on location
3. Washington is a destination-based state — charge the rate where the buyer receives the product
4. Charge the correct rate at the point of sale and itemize on receipts
5. Accept Washington resale certificates from qualifying wholesale buyers
6. Keep records of all transactions and exemption certificates for at least 5 years

How to file and remit sales tax in Washington

Filing your sales tax return on time is critical to avoid penalties. Washington requires electronic filing for most businesses.

1. File electronically through the Washington Department of Revenue at dor.wa.gov
2. You file a combined excise tax return covering both sales tax and B&O tax
3. Filing frequency is monthly, quarterly, or annually based on your tax liability
4. Report gross sales, deductions, taxable sales, and B&O income by classification
5. Pay electronically by the return due date — the 25th of the month following the reporting period
6. Retain all records for at least 5 years

What is exempt from Washington sales tax?

Not everything is subject to sales tax. Washington provides exemptions for certain products, buyers, and uses. Always verify the specific exemption requirements with the Washington Department of Revenue.

• •Sales for resale with a valid Washington resale certificate
• •Grocery food for home consumption
• •Prescription drugs and certain medical devices
• •Manufacturing machinery and equipment
• •Agricultural inputs including feed, seed, and fertilizer
• •Sales to federal, state, and local governments
• •Qualifying nonprofit organizations with a valid exemption certificate

What are the highest combined sales tax rates in Washington?

Because Washington allows local jurisdictions to add their own sales taxes on top of the state rate, combined rates vary by location. Here are some of the highest combined rates in major Washington cities.

What is use tax in Washington?

Washington use tax applies at the same rate as sales tax when you purchase taxable goods from out-of-state vendors who do not collect Washington sales tax. Businesses must report and pay use tax on their regular sales tax return. Common triggers include online purchases, out-of-state equipment, and supplies from non-collecting vendors.

Does Washington have marketplace facilitator rules?

Washington requires marketplace facilitators meeting the economic nexus threshold to collect and remit sales tax on behalf of third-party sellers. Major platforms including Amazon, eBay, Etsy, and Walmart Marketplace collect Washington sales tax on marketplace transactions. Sellers using marketplace facilitators are not required to collect on marketplace sales but remain responsible for direct sales.

What are the penalties for sales tax non-compliance in Washington?

Washington imposes a late-filing penalty of 5% per month (up to 25%). A 9% assessment penalty applies to tax due on returns. Interest accrues at the rate set by the Department (typically 3-5%). Failure to register can result in a $100 penalty per month. Fraud penalties are 50% of the underpayment. Criminal penalties for willful evasion include fines and imprisonment.

This is general information, not legal or tax advice. Tax rules change frequently — always verify with the official state agency. Sources: Washington Department of Revenue.