Washington economic nexus threshold for sales tax
Data version 2026-Q3 · reviewed 2026-07-14
If you sell into Washington without a physical presence, you may still be required to register for, collect, and remit sales tax once your sales cross the state's economic nexus threshold. Here is where Washington stands.
Washington threshold at a glance
| Revenue threshold | $100,000 |
|---|---|
| Transaction threshold | None |
| How they combine | Revenue only |
| Measurement period | Current or previous calendar year |
| State sales-tax rate | 6.5% |
What this means for remote sellers
Washington uses a revenue-only economic nexus threshold. You establish nexus once your gross sales into Washington reach $100,000 during current or previous calendar year. The number of separate transactions does not affect the threshold.
How Washington compares to other states
Washington's $100,000 revenue threshold is the most common in the country — 42 jurisdictions use it. It is one of 29 jurisdictions that look at revenue only — the number of transactions does not count. Its 6.5% base sales-tax rate sits above the roughly 5.7% average state rate.
How the Washington threshold is measured
Washington measures the threshold over Current or previous calendar year. Gross sales generally include taxable and (in many states) exempt sales; rules on marketplace-facilitated sales vary. Verify the specifics with the Washington department of revenue.
Do marketplaces collect Washington sales tax?
Washington requires marketplace facilitators — platforms such as Amazon, Etsy, eBay, and Walmart — to collect and remit Washington sales tax on sales made through them. If you sell only through those marketplaces, the platform generally collects the tax for you. Sales you make directly — through your own website or store — still count toward your Washington economic nexus threshold and remain your responsibility. Whether marketplace-facilitated sales also count toward your own threshold varies, so confirm with the Washington Department of Revenue.
What to do if you've crossed it
- Register with the Washington Department of Revenue for a sales-tax permit.
- Begin collecting tax on taxable sales to Washington customers.
- File and remit on the schedule the state assigns.
- Confirm treatment of marketplace sales and any local taxes with a professional.
Not sure where you stand?
Check your economic nexus exposure across all 50 states and DC in seconds — free.
Tools to get compliant
Triggered nexus somewhere? These tools handle registration, collection, filing, and remittance so you don't have to.
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Washington economic nexus FAQ
What is the economic nexus threshold in Washington?
Washington uses a revenue-only economic nexus threshold. You establish nexus once your gross sales into Washington reach $100,000 during current or previous calendar year. The number of separate transactions does not affect the threshold.
Do remote sellers have to collect Washington sales tax?
If your sales into Washington cross the threshold ($100,000) during current or previous calendar year, you generally must register, collect, and remit Washington sales tax.
Does Washington count the number of transactions?
No. Washington measures only revenue ($100,000); the number of transactions does not matter.
When did Washington's economic nexus rules take effect?
Washington began enforcing economic nexus on October 1, 2018. Economic nexus stems from the 2018 South Dakota v. Wayfair Supreme Court decision; states phased in their rules afterward. Note: Also relevant for B&O tax economic nexus (separate analysis).
What is the sales tax rate in Washington?
Washington's statewide base sales-tax rate is 6.5%. Local jurisdictions may add their own tax, so the total rate at a given address is often higher. Once you establish nexus, you collect at the combined state and local rate for the destination.
Do marketplaces like Amazon collect Washington sales tax?
Yes. Washington requires marketplace facilitators — platforms such as Amazon, Etsy, eBay, and Walmart — to collect and remit sales tax on sales made through them. Sales you make directly, through your own website or store, still count toward your Washington economic nexus threshold.
How do I register for a Washington sales tax permit?
Register with the Washington Department of Revenue. You will need your business information and the date you first crossed the threshold. After registering, the state will assign a filing frequency based on your sales volume.
Related states
Informational only — not legal or tax advice. Verify with the Washington department of revenue and a qualified professional.