Seattle Tax Structure: Local Taxes, Levies, and Revenue Sources

Seattle's revenue framework draws from a layered set of local taxes, voter-approved levies, utility charges, and intergovernmental transfers that together fund the City's annual general fund and capital programs. This page maps the primary revenue instruments available to Seattle under Washington State law, explains how each mechanism operates, identifies the scenarios in which residents and businesses most commonly encounter them, and defines the boundaries between City, King County, and state-level tax authority. Understanding these distinctions is essential for property owners, businesses, and civic participants who engage with the Seattle City Budget process or challenge assessments.

Definition and Scope

Seattle's taxing authority is not self-defined — it derives from Washington State statute and the limits established in the Seattle City Charter. The State Constitution and the Revised Code of Washington (RCW) set the framework within which Seattle and all Washington cities may levy taxes, impose fees, and float bonds.

Scope and coverage limitations: This page covers revenue instruments administered by the City of Seattle or jointly with King County on behalf of City programs. It does not cover King County property tax levies beyond the City's own levy, Washington State sales and use tax rates set by Olympia, Port of Seattle tax authority, Sound Transit's taxing power, or Seattle School District levies — each of those is a separate jurisdiction with independent statutory authority. The King County Government page addresses county-level fiscal structures, and the Sound Transit page covers the regional transit agency's taxing mechanisms.

Seattle's major local revenue categories are:

  1. Property tax levies — general levy and special purpose levies
  2. Business and Occupation (B&O) tax — gross receipts-based
  3. Real Estate Excise Tax (REET) — transfer tax at point of sale
  4. Utility taxes — applied to utility gross revenues
  5. Sales tax add-ons — City's share of the state-collected sales tax
  6. Parking and admission taxes
  7. Voter-approved levies — dedicated to specific programs

How It Works

Property Tax: Under RCW 84.55, regular property tax levies are capped at a 1% annual increase on existing property or the rate of inflation (whichever is lower), absent voter approval. Seattle's regular levy rate, combined with overlapping King County, State, and special district levies, is subject to the constitutional aggregate limit of $10 per $1,000 of assessed value (Washington State Constitution, Article VII, §2). The King County Assessor determines assessed values; Seattle sets its levy rate within statutory limits.

Business and Occupation (B&O) Tax: Seattle imposes a B&O tax on the gross receipts of businesses operating within city limits, with rates varying by industry classification. Retail businesses, for example, face a different rate than service businesses — rates are set by Seattle Municipal Code (SMC) Chapter 5.45. Unlike income taxes (which Washington State does not levy), B&O taxes apply to gross revenue regardless of profitability, making them a consistent but sometimes contested revenue source for small-margin businesses.

Real Estate Excise Tax (REET): Seattle collects a local REET on real property transfers within city limits. Washington State also collects a REET at the state level; the City's local portion is authorized under RCW 82.46. Revenue from the local REET is typically earmarked for capital projects, including Seattle Office of Housing programs and infrastructure investment.

Utility Taxes: Seattle applies a tax to the gross revenues of utilities operating in the city — including Seattle City Light and Seattle Public Utilities — at rates set in SMC Chapter 5.48. These taxes flow into the general fund and represent one of the more stable revenue streams because utility consumption is relatively inelastic.

Voter-Approved Levies: Levies that exceed regular statutory limits require approval by a simple majority of Seattle voters under RCW 84.55.050. Seattle has approved levy lid lifts for purposes including the Seattle Housing Levy (last renewed in 2023 for a 7-year term), the Seattle Parks District levy, and the Seattle Preschool Program levy. Each levy is time-limited, purpose-restricted, and subject to audit.

Common Scenarios

Homeowner receiving a property tax bill: The bill reflects not just Seattle's general levy but also overlapping levies from King County, the State, Sound Transit, the School District, and any voter-approved special levies. Seattle's share is one line item among 8 to 12 separate taxing district charges on a typical King County property tax statement.

Small business calculating B&O liability: A retail business grossing $500,000 annually in Seattle calculates B&O tax at the applicable retail rate (set in SMC 5.45.050) on total gross receipts, with no deduction for cost of goods sold or operating expenses. A manufacturing business at the same gross revenue applies a different, lower rate — the rate differential between classifications can meaningfully affect effective tax burden.

Developer completing a commercial sale: At closing, the seller pays the Washington State REET plus Seattle's local REET. For higher-value transactions, Washington's graduated state REET rates (enacted in 2019 under ESHB 2136) apply on a tiered basis above $500,000.

Voters considering a levy measure: Levy measures appear on ballots administered by King County Elections. A measure must pass by simple majority. If approved, the Seattle City Council appropriates the funds annually within the levy's stated purpose.

Decision Boundaries

The critical distinction in Seattle's tax structure is between regular levies (set administratively within statutory caps, no voter vote required) and excess or special levies (require voter approval and are subject to higher rate limits for a defined period). This parallels a contrast found across Washington municipalities: ongoing operational capacity versus time-bounded program investment.

A second boundary is jurisdictional. Taxes on income are constitutionally prohibited in Washington State — a constraint confirmed by Washington Supreme Court precedent — which explains the reliance on B&O gross receipts taxation rather than net income taxation. The Seattle Relationship with Washington State page covers the broader constitutional framework governing what Seattle may and may not do without state authorization.

The /index provides an orientation to the full range of civic topics covered for the Seattle metro area, including governance, land use policy, and public finance.

Property tax exemption and deferral programs — such as the Senior Citizen and Disabled Persons Property Tax Exemption administered under RCW 84.36.381 — are administered by the King County Assessor, not the City of Seattle, and fall outside the City's direct revenue administration.

References

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