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United States · Washington · Seattle

Card processing rules for Seattle merchants

This page covers what is actually different once you cross into Seattle city limits — a business tax the city runs itself on top of the state's, and a combined sales tax rate that just moved.

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Seattle files its own B&O tax — the state return does not cover it

Washington has no state income tax, and instead runs a business and occupation (B&O) tax on gross receipts, administered by the Department of Revenue. Seattle, like several other Washington cities, layers its own city-level B&O tax on top of that, administered separately by the city's Finance and Administrative Services department rather than the state. The city says this plainly on its own site: the Seattle business license tax "is not the same as the Washington State B&O tax," and a business must file its Seattle taxes separately from its state taxes. Registering and paying the state B&O tax does nothing to satisfy the Seattle obligation, and the two agencies do not share a filing system.

For the 2026-2032 rate period, Seattle's own tax-rates-and-classifications page lists 0.342% on retail sales, retail services, wholesaling, manufacturing, extracting, printing and publishing, and tour-operator activity, and 0.658% on service and other business activities plus freight transportation for hire. Those rates replaced 0.222% and 0.427% respectively for the 2018-2025 period — a real increase a Seattle business needs to model into its cost base, distinct from anything Olympia charges. Filing frequency also changed for 2026: the city's taxable-threshold increase to $2 million moved some previously quarterly filers to an annual schedule.

Where this actually bites a business

The common failure mode is a business that registers with the state, assumes that covers "Washington taxes" in general, and only discovers the separate Seattle obligation during a license renewal or an audit — at which point it owes back city returns plus penalties on top of whatever it already paid the state. This is a particular risk for a business opening its first Seattle location after operating elsewhere in Washington under a jurisdiction that does not run its own city B&O tax, since the assumption that one state filing covers everything is reasonable almost everywhere else in the state and wrong specifically inside Seattle.

10.55 percent combined sales tax — and you pay card fees on it

The Washington Department of Revenue's local sales tax rate change notice for the Seattle area puts the combined rate at 10.55% effective January 1, 2026, up from 10.35%. The increase came from dual 0.1% public-safety sales tax measures adopted by King County and by the city of Seattle, layered on top of the 6.5% state rate and the existing transit, cultural and other local district shares the department administers on the city's behalf. Rates can vary by the exact address within city limits and by special taxing district, so a business with more than one Seattle-area location should confirm the rate at each address with the department's rate lookup tool rather than assume the citywide figure applies everywhere.

That number matters for payments the same way it does in every high-combined-rate market: interchange and your processor's discount rate are calculated on the full authorized amount, and the full authorized amount includes the sales tax you collect and remit on the business's behalf. At 10.55%, roughly 9.5% of every card-funded ticket in Seattle is money you never keep, and your effective processing rate still applies to it in full. On a $100 pre-tax sale you authorize $110.55, and every basis point of markup lands on that larger number, not the smaller one.

We are not going to hand you a dollar figure for what that costs, because it depends entirely on your card mix, average ticket and pricing structure, and any processor who quotes a saving before reading your statement is guessing. What we will say is that a high combined rate like Seattle's, stacked on top of a city B&O tax the state return does not cover, makes it worth knowing your actual effective rate before you sign anything new.

What changes for Seattle dining rooms and stores

For a Seattle restaurant, the city B&O registration compounds with normal POS setup, since a new location needs both a state B&O account and a separate Seattle business license tax account before the first sale rings through if the owner wants to avoid a retroactive filing problem later. Tip-adjusted tickets and the authorization-versus-settlement timing that affects every restaurant nationally still apply on top of that; our restaurant payment processing hub covers the general mechanics of tip handling and settlement timing a Seattle restaurant faces along with everyone else.

For Seattle retail, the 10.55% combined sales tax rate does most of the work, since retail tickets are fully taxable more often than restaurant tickets and the tax component sits well above the national median. Two retailers on the same Seattle block can show very different effective processing rates purely from how much of their volume runs on cards that carry higher interchange, before the tax component is even factored in. Our retail payment processing hub sets out how to read that off a real statement.

Sources

Updated 18 September 2026. General information, not legal or tax advice. Rules change; confirm current rules with the Washington Department of Revenue, the City of Seattle, your attorney and your accountant before you register, file or change how you price.

Related pages

Seattle FAQ

Seattle merchant FAQ

Yes. The Seattle business license tax — commonly called the Seattle B&O tax — is a distinct gross-receipts tax administered by the city's Finance and Administrative Services department, not the Washington Department of Revenue. A business with any Seattle nexus registers, files and pays the city tax on top of, and separately from, the state B&O tax it already files with the Department of Revenue. Filing state B&O does not satisfy the Seattle obligation, and the two returns run on different schedules.

For the 2026-2032 rate period, Seattle taxes retail sales, retail services, wholesaling, manufacturing, extracting, printing and publishing, and tour-operator activity at 0.342% of gross receipts, and taxes service and other business activities, plus freight transportation for hire, at 0.658%. Those replaced the 2018-2025 rates of 0.222% and 0.427% respectively, per the city's own tax-rates-and-classifications page. A business that crosses Seattle's revenue threshold owes the tax on every dollar of Seattle-sourced gross receipts in the applicable classification, not just the amount above the threshold.

10.55% as of January 1, 2026, up from 10.35%: 6.5% Washington state tax plus 4.05% in local, regional transit and public-safety district taxes layered on top under state administration, per the Washington Department of Revenue's local sales tax rate change notice for the Seattle area. The increase reflects dual 0.1% public-safety sales tax measures adopted by King County and the city. Rates can vary by exact address inside city limits, so confirm the rate at a specific location with the department's rate lookup tool rather than assuming the citywide figure applies everywhere.

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