Washington State B&O Tax Explained: Rates, Classifications, and How to File
No other major U.S. state uses a gross receipts tax as its primary business tax the way Washington does. Most business owners moving from California, Texas, Florida, or New York expect to pay income tax. Washington has no broad-based income tax. Instead, all businesses with Washington nexus generally report under the B&O (Business and Occupation) tax on every dollar of gross revenue, before any expenses are deducted. A business can operate at a loss and still owe B&O tax on its revenue. This is the tax that catches most new Washington business owners off guard.
Key Takeaways
• The B&O tax is a gross receipts tax. It applies to total revenue before any deductions for wages, rent, materials, or other expenses.
• All businesses with Washington nexus generally must report under B&O. Credits, exemptions, or nonreporting status may reduce or eliminate the actual amount owed.
• Tax rates vary by business classification, not entity type. An LLC and a corporation in the same industry pay the same rate.
• Service businesses with over $1 million in gross income saw rate increases effective October 1, 2025.
• The Small Business B&O Tax Credit can reduce or eliminate the tax for businesses below certain annual thresholds. Verify current thresholds at dor.wa.gov.
What Is the B&O Tax?
The B&O tax is Washington's primary business tax. It is assessed on gross receipts: the total amount your business takes in from customers, before subtracting any business costs. No deductions exist for wages paid to employees, rent, cost of goods sold, or any other expense.
A retail store earning $500,000 in sales and spending $450,000 on inventory, rent, and payroll still pays B&O tax on the full $500,000. A freelance consultant earning $80,000 and spending $40,000 on software and equipment still pays B&O tax on the full $80,000.
This structure surprises most business owners from income-tax states. Plan for the B&O tax from day one of operations.
Who Has to Pay B&O Tax?
All businesses operating in Washington with Washington nexus generally must report under B&O. This includes:
• Sole proprietors
• LLCs (single-member and multi-member)
• C corporations
• S corporations
• Partnerships
• Nonprofits on unrelated business income
• Out-of-state companies with Washington nexus
The 2026 remote-worker rule clarifies one nexus point: having a Washington-based remote employee alone does not automatically trigger 'doing business in Washington' for Secretary of State registration purposes under the new law effective June 11, 2026. However, this rule addresses SOS registration only. Physical presence in Washington, including employees, can still create Department of Revenue tax nexus independently. Verify your specific situation with a tax professional.
B&O Tax Classifications and Rates
The DOR assigns your B&O tax classification based on your primary business activity. Verify all current rates at dor.wa.gov/taxes-rates/business-occupation-tax before filing. Rates are subject to change.
B&O Classification | Current Rate | Notes |
Retailing | 0.471% | Scheduled to increase to 0.5% in 2027 — verify |
Wholesaling | 0.484% | Scheduled to increase to 0.5% in 2027 — verify |
Manufacturing | 0.484% | Verify current rate at dor.wa.gov |
Service and Other Activities (under $1M) | 1.5% | |
Service and Other Activities ($1M to $5M) | 1.75% | Effective Oct. 1, 2025 |
Service and Other Activities (over $5M) | 2.1% | Effective Oct. 1, 2025 |
Payment card processing | 3.1% | New classification effective Jan. 1, 2026 |
Advanced computing (Workforce Education surcharge) | 7.5% surcharge | Effective Jan. 1, 2026 — verify at dor.wa.gov |
Verify all rates directly at dor.wa.gov/taxes-rates/business-occupation-tax. The DOR posts special notices when rates change. The rates above reflect audited information as of June 12, 2026, but may have changed.
Recent B&O Tax Changes: 2025 and 2026
October 1, 2025: Service Rate Restructuring
The Service and Other Activities classification moved from a flat rate to a tiered system based on revenue. Businesses with more than $1 million in gross income now pay higher rates on the revenue above each threshold. The change affects IT service firms, consultants, marketing agencies, financial services, and other service businesses.
October 1, 2025: New Taxable Services
Certain IT services, custom software development, and specific digital services became subject to B&O tax as of October 1, 2025. Verify which services apply to your business at dor.wa.gov.
January 1, 2026: Large Business Surcharge
Businesses with Washington taxable income over $250 million now pay an additional 0.5% surcharge. This applies only to very large enterprises and does not affect most small and mid-size businesses.
January 1, 2026: Payment Card Processing Classification
A new 3.1% classification was created for payment card processing companies.
January 1, 2026: Workforce Education Investment Surcharge
The surcharge for certain advanced computing businesses increased to 7.5%. Verify current applicability and rate at dor.wa.gov.
The Small Business B&O Tax Credit
Washington offers a Small Business B&O Tax Credit that can reduce or eliminate the tax for businesses below certain annual gross income thresholds. The credit applies on a sliding scale: the lower your gross income relative to the threshold, the larger your potential credit.
Verify the current credit thresholds at dor.wa.gov. A freelance web designer earning $80,000 in a year may owe $0 in B&O tax after applying the credit. A retail store with $500,000 in sales typically owes the full retail rate on gross receipts.
How to File Your B&O Tax Return
B&O tax is filed through My DOR at dor.wa.gov. The DOR assigns a filing frequency when you register:
• Monthly: for businesses with high annual B&O tax liability
• Quarterly: for mid-range tax liability
• Annual: for businesses with lower liability — annual combined excise returns are due April 15
Late-payment penalties generally progress as follows: 9% after the due date, then 19%, then 29%, with a minimum penalty of $5. Verify current penalty rules at dor.wa.gov.
Filing is done through the combined excise tax return, which covers B&O tax and sales tax in a single form.
Real-World B&O Tax Examples
Freelance Web Designer in Seattle Earning $80,000
Classification: Service and Other Activities. Rate: 1.5%. Gross B&O owed before credit: $1,200. After applying the Small Business B&O Tax Credit, the actual amount owed may be reduced to $0 depending on current thresholds. Verify at dor.wa.gov.
Retail Store in Tacoma With $500,000 in Annual Sales
Classification: Retailing. Rate: 0.471%. B&O owed: $2,355.
IT Services Firm in Bellevue Earning $3 Million
Classification: Service and Other Activities. The tiered rate applies: 1.5% on the first $1 million ($15,000), then 1.75% on the next $2 million ($35,000). Total B&O owed before credits: approximately $50,000. Verify calculation using current DOR rate tables.
B&O Tax vs. Sales Tax: Two Separate Obligations
Washington retail businesses pay both the B&O tax and sales tax. These are separate obligations:
• B&O tax is paid by the business on gross receipts. It is a cost to the business.
• Sales tax is collected from customers and remitted to the DOR. It is a pass-through.
A retail store with $500,000 in sales owes B&O tax of $2,355 (0.471%) and also collects and remits sales tax from customers at the applicable rate for the customer's location.
For sales tax details, see [LINK: Washington State Sales Tax: How to Register, Collect, and File].
Common Mistakes
• Not planning for B&O tax from day one. The tax applies to gross revenue whether or not the business is profitable.
• Using the wrong classification. Misclassifying a business activity results in the wrong rate. Check the DOR classification guide at dor.wa.gov/taxes-rates/business-occupation-tax/business-occupation-tax-classifications.
• Missing the annual return deadline. Annual combined excise returns are due April 15. Late filing triggers the 9% initial penalty.
• Forgetting the Small Business Credit. Small business owners who qualify may owe $0. But you must still file the return. The credit is not automatic if you skip filing.
Frequently Asked Questions
What is the B&O tax in Washington State?
The B&O (Business and Occupation) tax is a gross receipts tax Washington imposes on business revenue. It applies to total revenue before any deductions. All businesses with Washington nexus generally report under it.
Does every Washington business have to pay the B&O tax?
Businesses with Washington nexus generally must report under B&O. Credits, exemptions, or nonreporting thresholds may reduce the actual amount owed. The Small Business B&O Tax Credit can eliminate the liability for small businesses. But the reporting obligation generally still exists.
What is the B&O tax rate for service businesses in Washington?
Service businesses under $1 million in gross income pay 1.5%. Businesses earning $1 million to $5 million pay 1.75% (effective October 1, 2025). Businesses over $5 million pay 2.1% (effective October 1, 2025). Verify all rates at dor.wa.gov.
Can you deduct expenses from the B&O tax?
No. The B&O tax applies to gross revenue. There are no deductions for wages, rent, cost of goods sold, or any other business expense.
What is the Small Business B&O Tax Credit?
A sliding-scale credit that reduces or eliminates B&O tax for businesses below certain annual gross income thresholds. Verify the current thresholds and credit amounts at dor.wa.gov.
How often do I file my B&O tax return in Washington?
The DOR assigns a filing frequency based on your annual tax liability: monthly, quarterly, or annual. Annual combined excise returns are due April 15.
Did Washington change B&O tax rates recently?
Yes. Service rates became tiered effective October 1, 2025. New classifications and surcharges took effect January 1, 2026. Always verify current rates at dor.wa.gov.
Does an LLC pay B&O tax in Washington?
Yes. LLCs with Washington nexus generally report under B&O tax. The rate depends on the type of business activity, not the entity type.
Takeaway
The B&O tax is Washington's primary business tax and one of the most misunderstood. Unlike an income tax, it does not care whether your business is profitable. Plan for it based on gross revenue, identify your correct classification, and file on time. For most small businesses, the Small Business B&O Tax Credit reduces or eliminates the liability. But you still need to register and file.
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Sources
WA DOR - B&O Tax Classifications
WA DOR - Small Business B&O Credit
Disclaimer
This article is for general informational purposes only and is not legal, tax, financial, or licensing advice. Washington laws, tax rates, agency procedures, and city requirements can change. Verify the current requirements with the relevant agency or a qualified professional before acting.
Current as of June 12, 2026.