// Washington Tax Basics
Washington Tax Basics
Understand the fundamentals
Washington State does not levy a corporate or personal income tax. Instead, the state's revenue system is built on excise taxes — primarily the Business & Occupation (B&O) tax, retail sales tax, and use tax. This makes Washington's tax structure fundamentally different from most other states, and businesses operating here for the first time often find that the rules they're accustomed to don't apply.
The B&O tax is imposed on gross receipts, not net income — meaning there is no deduction for cost of goods sold, salaries, or operating expenses. Rates vary by classification: retailing (0.471%), wholesaling (0.484%), manufacturing (0.484%), and service/other activities (1.5%) are among the most common. Many businesses have activities that fall under multiple classifications, and getting the classification right is one of the most consequential compliance decisions a business makes. Retail sales tax is imposed on the sale of tangible personal property and, as of October 2025 under ESSB 5814, a significantly expanded list of services. The tax is collected by the seller and remitted to DOR, with rates that vary by location across more than 300 local tax jurisdictions. Use tax is the complement to sales tax — it applies when tangible personal property or taxable services are used in Washington and sales tax was not collected at the point of sale.
Beyond the core taxes, Washington imposes a range of other excise taxes including the Real Estate Excise Tax (REET), hazardous substance tax, litter tax, tobacco and vapor products tax, and others. Each has its own rules, rates, and compliance requirements. The resources below provide a foundational overview of the entire system.
What's Included
- B&O tax structure: gross receipts basis, classification rates, and the multiple activities tax credit (MATC)
- Retail sales tax: sourcing rules, local rate variations, and the expanded service tax base under ESSB 5814
- Use tax: when it applies, self-assessment requirements, and common compliance gaps
- Tax classification definitions and the rules for determining which classification applies to each activity
- Digital products and SaaS taxation under Washington's digital goods framework (WAC 458-20-15503)
- Overview of additional excise taxes: REET, hazardous substance tax, and other industry-specific levies
DOR Resources
High-level overview of Washington's B&O tax
Tax classifications for common business activities
Complete list of B&O tax rates
Official definitions for each B&O classification
Overview of Washington's retail sales tax
Services that have become subject to retail sales tax
Tax rules for digital goods and products
Comprehensive introduction to all Washington taxes
Annual tax statistics publication
Overview of additional state taxes beyond B&O and sales tax
Why Washington Tax Desk
Washington's tax system is unique, and understanding its mechanics is the foundation for everything else — compliance, planning, refund identification, and audit defense. The interaction between B&O classifications, sales tax sourcing, use tax self-assessment, and the growing list of taxable services creates a system where the fundamentals genuinely matter. Getting them right from the start prevents most of the problems businesses encounter down the line.