Washington B&O Tax vs Washington Sales Tax: A Guide for New Sellers

Key Takeaways

• Washington’s Business & Occupation (B&O) tax applies to gross receipts and is separate from retail sales tax—many businesses owe one, the other, or both.
• Washington’s statewide sales tax rate is 6.5%, and most locations add local rates, creating different combined rates by city.
• Registration, filing, and payments are handled through the Washington State Department of Revenue using its My DOR portal.
• Washington requires destination-based local sales tax sourcing for most in-state deliveries, which can change the rate by customer address.

New to selling in Washington? The two taxes that cause the most confusion are Washington B&O tax (a gross receipts business tax) and Washington retail sales tax (a tax collected from customers). They often apply to the same transaction, but they are calculated differently, reported differently, and have different exemptions.

Washington B&O Tax vs. Washington Sales Tax: What’s the Difference?

Washington B&O tax: a gross receipts tax

Washington’s Business & Occupation (B&O) tax is imposed on your gross income from doing business in Washington. “Gross” means before expenses—no deduction for rent, labor, cost of goods sold, shipping costs you absorb, or platform fees (unless a specific deduction applies under Washington rules).

• Who pays it: The business.
• Tax base: Gross receipts from business activities.
• Commonly affected businesses: Retailers, service providers, contractors, wholesalers, manufacturers, and online sellers with Washington activity.

Washington sales tax: a trust tax collected from customers

Washington retail sales tax is generally collected from the buyer and remitted by the seller when a retail sale is made in Washington and the product or service is taxable. Local sales taxes apply in addition to the 6.5% state rate, so the combined rate depends on where the customer receives the goods or service.

• Who pays it: The customer (seller collects and remits).
• Tax base: Taxable selling price, including certain charges that are part of the sale.
• Key operational requirement: Charge the correct combined rate for the customer’s location (destination-based sourcing for most deliveries within Washington).

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Who Needs to Register in Washington (and Where to Do It)

Tax agency and registration system names

Washington’s tax agency is the Washington State Department of Revenue. Businesses typically register and manage accounts through My DOR (the Department of Revenue’s online account system). Many businesses also apply through the state’s Business Licensing Service (BLS) as part of broader licensing, but tax account management and filing are commonly handled in My DOR after setup.

What you typically register for

• B&O tax reporting (based on your Washington business activity).
• Retail sales tax collection (if making taxable retail sales to Washington customers).
• Use tax reporting (if you owe use tax on items used in Washington where sales tax wasn’t paid).

Washington-specific quirk new sellers often miss: destination-based local rates

Washington generally requires sellers to determine the correct local sales tax based on where the customer receives the goods (delivery address or other “place of receipt”), not merely where the seller is located. That means two Washington customers in different cities can owe different combined rates even when buying the same item from the same Washington seller.

How Washington B&O Tax Works for New Sellers

Common B&O classifications

Washington B&O is reported under classifications tied to your activity. A single business can have multiple classifications if it has multiple revenue streams.

• Retailing B&O: Selling tangible personal property to consumers in Washington.
• Wholesaling B&O: Selling to resellers (with proper reseller documentation).
• Service and Other Activities B&O: Many service-based revenues.
• Manufacturing B&O: Manufacturing activities in Washington.

B&O is calculated on gross receipts

B&O is computed on your gross proceeds of sales or gross income of the business, depending on the classification. Because it is not a net income tax, pricing and margin planning matter—especially for low-margin products.

B&O and sales tax can both apply on the same sale

It’s common for a Washington retailer to:

• Collect and remit retail sales tax from the customer, and
• Pay Retailing B&O tax on the gross sales amount (separate calculation).

Need help registering? Start your application.

How Washington Sales Tax Works (Rates, Local Add-ons, and Sourcing)

State and local structure

Washington’s sales tax has a 6.5% state rate plus local rates that vary by location. The combined rate is what your customer pays on taxable sales.

Destination-based sourcing in practice

For shipped or delivered items within Washington, the local rate is generally determined by the customer’s delivery address (the place the buyer receives the goods). This affects:

• Online orders shipped to Washington addresses
• Phone orders delivered to Washington locations
• In-state deliveries from your warehouse or store to the buyer

Mid-page reference table: Washington rates and locations

Filing and Reporting in Washington (Forms, Returns, and Recordkeeping)

Where you file

Most taxpayers file and pay electronically through My DOR. Your filing frequency (monthly, quarterly, or annual) is assigned by the Washington State Department of Revenue based on your activity.

Washington-specific form names you may encounter

• Business License Application (commonly used to establish your Washington tax account and related registrations through the state’s licensing process).
• Washington Combined Excise Tax Return (the primary return used to report B&O tax and, when applicable, retail sales tax, use tax, and other excise taxes).
• Washington Reseller Permit (used to document certain wholesale purchases for resale; keep it on file and manage expiration/validity per Washington rules).

What to keep in your records

• Gross sales and supporting sales reports (by channel and by Washington delivery location)
• Tax collected by jurisdiction (local rate breakdowns)
• Exemption documentation and reseller documentation
• Returns, confirmations, and payment records from My DOR

Practical Examples: When You Owe B&O, Sales Tax, or Both

Example 1: Washington retail seller shipping to a Washington customer

• Sales tax: Collect based on the customer’s delivery address (combined state + local rate).
• B&O tax: Report retailing gross receipts under the appropriate B&O classification.

Example 2: Service provider with Washington clients

• Sales tax: Depends on whether the service is a taxable retail service under Washington rules.
• B&O tax: Service revenue is commonly reportable under Service and Other Activities (or another applicable classification).

Example 3: Wholesale to a Washington reseller

• Sales tax: Generally not collected when properly documented as a wholesale sale.
• B&O tax: Report under Wholesaling B&O (with required reseller documentation kept on file).

Common Washington Setup Steps for New Sellers

Step-by-step compliance checklist

1. Confirm you need a Washington tax account (B&O, sales tax, or both) based on your Washington activity.
2. Register and set up access in My DOR.
3. Configure your checkout or invoicing to calculate the correct Washington combined sales tax rate by delivery address.
4. Map product taxability (taxable vs. exempt) based on Washington rules.
5. File the Washington Combined Excise Tax Return by the assigned due dates and remit tax collected.

Get your permit today — begin here.

Related Reading (Context for Multi-State