// Sales/Use & Excise Tax Compliance
Sales/Use & Excise Tax Compliance
Stay compliant, stay focused on your business
Washington's excise tax system is layered and detail-intensive. B&O tax applies to gross receipts across dozens of classifications, each with its own rate — and many businesses have activities that span multiple classifications. Retail sales tax rates vary by location (with over 300 local tax jurisdictions in the state), and sourcing rules determine which rate applies based on where delivery occurs, not where the seller is located. Use tax applies when sales tax was not collected, and it is self-assessed — meaning it frequently goes underreported.
The compliance process involves correctly classifying every revenue stream under the right B&O category, applying the correct local sales tax rate to each transaction, tracking exempt sales with proper documentation (reseller permits, exemption certificates), self-assessing use tax on qualifying purchases, and filing combined excise tax returns on the required schedule. As of October 2025, the tax base has expanded significantly under ESSB 5814, bringing many professional and personal services into the retail sales tax for the first time.
Compliance errors tend to compound. A misclassified revenue stream affects every filing period until it's corrected. A missing reseller permit creates exposure on every transaction with that customer. These issues are often not discovered until an audit — at which point penalties and interest have been accruing for years.
What's Included
- B&O classification analysis across all revenue streams to ensure correct tax reporting
- Sales tax sourcing and local rate application across Washington's 300+ jurisdictions
- Exempt transaction documentation management (reseller permits, exemption certificates)
- Use tax self-assessment review and compliance for qualifying purchases
- Combined excise tax return preparation, electronic filing, and payment management
- DOR notice response, penalty abatement, and account reconciliation
Why Washington Tax Desk
Washington's excise tax system rewards precision and punishes inattention. The interaction between B&O classifications, sales tax sourcing rules, and the expanding tax base under ESSB 5814 creates a compliance environment where errors compound quickly. Getting it right from the start — and keeping it right as the rules change — is the most cost-effective tax strategy a business can have.