Washington State tax intelligence

Washington tax intelligence, brought into focus.

Research Washington tax law, Department of Revenue guidance, legislative developments, notices, and exemptions — every answer cited to the primary sources.

Updated daily
Primary-source cited
Community supported

sources indexed: 6,100+sources indexed
source citations: Primarysource citations
DOR monitoring: DailyDOR monitoring
focused research: WA onlyfocused research

01 · High-interest now

The Current Brief

The Washington tax issues moving right now, and what each one means in practice.

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Washington Retail Services Sales Tax

Track ESSB 5814, ESSB 6113, sourcing, MPU, DOR interim guidance, and the scheduled 2029 repeal for most newly taxable services.

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Washington Millionaires Tax

Follow the 9.90% income-tax program, 2028 start date, 2029 return/payment timeline, litigation risk, and retail-services tax relief connection.

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The standard

Every answer returns to the primary source.

Research here is built on Washington's own published law and guidance, and every answer carries the citation back to it — so you can check the reasoning rather than take it on trust.

RCWWACETADOR

02 · Monitored daily

Latest Washington Tax Developments

DOR guidance changes and tax legislation, tracked by daily monitors and summarized here.

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Aug 3Special NoticeNew DOR Special Notice: Prepayment of Capital Gains TaxThe Washington Department of Revenue has published a new special notice addressing prepayment of the capital gains tax. Here's what taxpayers and advisors should know before relying on it.Jul 13DOR GuidanceDOR Publishes New Guidance on Casual or Isolated Sales: What Registered Businesses Need to KnowWashington DOR added a new tax topic page clarifying when casual or isolated sales are exempt from B&O tax—and when sales tax and reporting obligations still apply. Registered businesses that occasionally sell assets outside their normal course of business should review the guidance.Jun 29Special NoticeHigh grossing business surcharge: New exemptionHigh grossing business surcharge: New exemption. Subject: B&O Tax Exemption Apr 1Legislation6231 — C 266 L 26Data center tax exemptionsExpiring tax exemptions for data centers. (REVISED FOR ENGROSSED: Removing a tax exemption for the replacement of equipment for data centers.)Apr 1Legislation2487/5949 — C 263 L 26Insurer taxesConcerning taxes imposed on insurers operating within the state.

03 · Client tools

Preview Every Client Tool

These are the same eight tools available in the client portal. Here you can see what each one does; questionnaires, uploads, calculations, saved work, and deliverables stay behind client sign-in.

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Tax Refund Engine

Upload purchase data and identify potential Washington sales and use tax overpayments for review.

Work Papers

Turn an auditor's workbook into organized findings, exceptions, rate checks, and supporting work papers.

VDA

Organize eligibility, estimated exposure, evidence, review, and a complete voluntary-disclosure package.

Ruling Requests

Develop the transaction facts, questions presented, cited analysis, review record, and finished request package.

Annual Reconciliation

Compare reported figures with actual revenue by state or country, calculate the true-up, and prepare the memo, workbook, and filing packet.

DOR Notices

Keep Department letters private with their deadlines, risk, required actions, requested documents, and supporting excerpts.

Legislative Watchlist

Choose tax topics and industries, rank bills by relevance, and pin the Washington legislation you need to follow.

Taxability Matrix

Keep product and service taxability decisions, authority, jurisdictions, and review status in one maintained record.

04 · Where people get stuck

Common Issues

Practical starting points for the Washington tax problems taxpayers actually need to sort out.

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Received a DOR notice

Prepare for DOR notices, IDR scope, sampling issues, and proposed assessments.

Looking for a refund opportunity

Identify overpayment patterns, refund windows, and documentation gaps before filing.

Need help understanding nexus

Review physical presence, economic thresholds, and Washington-sourced receipts.

Need tax classification guidance

Sort revenue into the right B&O, retailing, service, or specialty classification.

Sales/use & excise compliance

Research sourcing, exemption support, use tax, notices, and filing obligations.

Considering voluntary disclosure

Evaluate VDA eligibility, lookback exposure, penalty relief, and registration steps.

05 · Community supported

Free to use, supported by the people who use it

The research tools stay open to everyone. When a matter needs individualized judgement, there is a person to talk to.

Need individualized help?

The research tools handle the groundwork, but audits, appeals, rulings, and disputed assessments need a professional who can look at your specific facts. Tell us what you're dealing with and we'll point you to the right kind of help.

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