Seattle Washington Tax Guide 2026: No Wage Tax, Capital Gains Tax, B&O Tax

Washington State does not tax wages and salary in 2026. (A 9.9% tax on Washington taxable income above $1 million, ESSB 6346, takes effect on 1 January 2028.) The state constitution's uniformity requirement has historically been a barrier to graduated income taxes. For most Washington workers, especially the large tech workforce employed at Amazon, Microsoft, Boeing, and thousands of smaller tech firms, the effective state income tax rate is zero on wages and salary.

However, Washington's tax landscape shifted in 2022 with the introduction of a 7% capital gains tax on long-term gains above an inflation-indexed deduction (originally $250,000; $278,000 for 2025), with a 9.9% rate on taxable gains above $1 million from 2025 — a provision that directly affects tech workers with significant stock compensation, investors, and business owners. The Washington Supreme Court upheld the tax in 2023. Combined with Seattle's 10.55% combined sales tax and the Business & Occupation (B&O) tax on gross business revenues, Washington's total tax picture is more nuanced than the 'no income tax' headline suggests.

Washington's No-Income-Tax Policy

Washington's lack of an income tax stems from a complex constitutional history. The state constitution requires taxes to be 'uniform' — a provision that courts have used to strike down graduated income taxes as unconstitutional. A 2010 ballot initiative for a graduated income tax (Initiative 1098) was defeated by voters 64-36. In 2026 the legislature enacted a 9.9% tax on individuals' Washington taxable income above $1 million, effective 1 January 2028 (ESSB 6346).

The practical impact for Seattle tech workers is substantial. Amazon, Microsoft, Boeing, and the broader Seattle tech ecosystem employ hundreds of thousands of high-salary workers. A software engineer earning $200,000 in Seattle pays zero Washington state income tax on that salary. In California, the same engineer would pay approximately $14,200 in California state income tax. This differential significantly increases Seattle's attractiveness for tech companies and employees, contributing to the concentration of tech talent in the Pacific Northwest.

Washington's Capital Gains Tax — What Tech Workers Need to Know

Washington's Capital Gains Tax (CGT) was signed into law in 2021 and took effect January 1, 2022. It imposes a 7% tax on taxable long-term capital gains (assets held more than one year) above a standard deduction that is indexed for inflation ($250,000 at the start; $278,000 for 2025). For 2025 and later, taxable gains above $1 million are taxed at 9.9% (7% plus an additional 2.9%). Short-term gains remain untaxed at the state level. The deduction applies per individual, couple or domestic partnership.

Key exemptions from the CGT include: real estate (excluding gain from real estate is a major carveout — home sales are exempt), assets in retirement accounts (IRAs, 401(k)s), and depreciable business assets, timber, and commercial fishing privileges. For tech workers with large stock option grants or RSU vesting events that result in long-term gain recognition above the annual deduction ($278,000 for 2025), the CGT can create significant tax bills. At $1 million in long-term gains, using the 2025 deduction of $278,000, the Washington CGT is $50,540 (7% × $722,000). This is less than California would charge a resident on the same $1 million (about $102,000 at 2026 rates for a single filer with no other income, since California taxes capital gains as ordinary income).

Seattle's Business & Occupation (B&O) Tax

Washington State's B&O tax is a gross receipts tax on businesses — not a net income tax. It applies to the total revenue of the business regardless of profitability. Seattle also levies its own city B&O tax in addition to the state B&O tax. Key state B&O tax rates by classification:

Seattle's city B&O tax is separate: for 2026–2032 the rate is 0.342% for retailing, wholesaling and manufacturing and 0.658% for service and other business activities, but businesses with Seattle gross receipts under $2 million owe no city B&O tax, and larger businesses subtract a $2 million standard deduction (Seattle Shield, effective 1 January 2026). For a Seattle-based software consulting firm with $3 million in service revenue and prior-year service income of $1 million or more, the state tax is 1.75% × $3M = $52,500 and the city tax is 0.658% × ($3M − $2M) = $6,580. The B&O tax does not allow deductions for employee wages, rent, or other business expenses — it is purely on gross revenue, which critics argue penalizes unprofitable businesses and startups.

Sales Tax in Seattle 2026

Seattle's combined sales tax rate is 10.55% (Washington DOR, effective 1 January 2026), assembled as follows:

Washington's sales tax exempts groceries from state sales tax — an important relief for households. Part of the local rate funds Sound Transit 3 (ST3), the transit expansion voters approved in 2016. Washington's relatively high sales tax rate, combined with the lack of income tax, makes the state's tax system notably regressive — lower-income households pay a higher percentage of their income in sales tax than high earners.

Total Tax Burden for Seattle Tech Workers

Seattle's tax environment is particularly favorable for high-salary tech workers with primarily wage income and no long-term capital gains above the state deduction. Here's a comparison for a senior software engineer earning $250,000 in salary (no significant capital gains):

Seattle's total burden is approximately $17,900 lower than San Francisco and approximately $23,800 lower than NYC for this income level. The advantage grows at higher salary levels. However, tech workers with large RSU grants whose vesting creates capital gains above $250,000 will face Washington's 7% CGT on the excess — a consideration for senior employees with multi-year equity packages.