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Tax strategy and filing in Washington

Proactive planning through the year rather than a surprise in April — entity structure, estimated payments, and filings coordinated with your books.

Washington has no state income tax, which makes it an attractive place to build a company — but the state makes up for it with a Business & Occupation (B&O) tax structure that's classified by activity type, and misclassifying your business is one of the most common (and expensive) mistakes we see when we take over books from a prior bookkeeper in Seattle, Bellevue, Tacoma, or Spokane. We correct B&O classification, track the state's 6.5% sales tax plus local rates that push close to 10% in Seattle, and build investor-ready financials for the tech startups that make up a huge share of our Washington client base — because a seed or Series A diligence process moves a lot faster when your books are already clean. Washington employers also navigate WA Paid Family & Medical Leave, the WA Cares long-term-care premium, and for the largest employers, Seattle's payroll expense tax. Beyond tech, we work with professional services firms, healthcare practices billing Apple Health through ProviderOne, and e-commerce companies managing multi-state sales tax exposure that starts with getting Washington right. Every engagement runs on the same flat published pricing and business-day-5 close as our other states.

Included from the Growth plan ($850/mo)

What you get every month

  • Quarterly estimated payment calculations
  • Entity and reasonable-compensation review
  • Business and owner return preparation
  • IRS and state notice response support

Washington-specific details

  • Washington's Business & Occupation (B&O) tax is a gross-receipts tax with rates that vary by business classification.
  • Washington's state sales tax rate is 6.5%, with local rates pushing the combined Seattle-area rate toward 10%.
  • Washington has no corporate income tax, but the B&O tax applies broadly to gross revenue.

Serving Seattle · Bellevue · Tacoma · Spokane.

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