Business and Occupation taxes, usually called B&O taxes, are gross receipts taxes that state and local governments charge businesses for the privilege of operating within their borders. The base is total revenue, not profit, so a business owes B&O tax on what it brings in before any deduction for wages, rent, materials, or other costs. Washington state uses B&O as its primary business tax, several Washington cities layer their own versions on top, and a few other states impose similar taxes under different names.
Gross Receipts, Not Profit
The feature that defines a B&O tax is its base. A company with $2 million in revenue that lost money after expenses still owes B&O tax on the full $2 million. That is fundamentally different from a corporate income tax, which only applies when the bottom line is positive. Washington does not impose a traditional state income tax on businesses at all and uses B&O in its place.1Washington Department of Revenue. Business and Occupation Tax
B&O is also not a sales tax. Sales tax is collected from the customer at the register and passed along by the business; B&O is levied on the business itself, based on what the business earns. Both can hit the same transaction. A Washington retailer typically owes B&O tax on its gross receipts and collects sales tax from the buyer on the same sale.
Because there is no deduction for cost of goods sold, wages, or overhead, the effective rate on actual profit runs much higher than the nominal rate looks. A business on thin margins feels B&O tax more sharply than one with wide margins, even though both pay the same percentage of gross receipts.
Where B&O Taxes Apply
Washington is the only state with a broad-based B&O tax reaching essentially all commercial activity. West Virginia uses the B&O label too, but its version applies only to public service and utility businesses rather than to businesses generally.2West Virginia Tax Division. Business and Occupation Tax
At the local level, dozens of Washington cities impose their own B&O taxes on top of the state one. Seattle is the most prominent example, requiring businesses operating within city limits to hold a city business license and pay a separate city-level B&O tax.3City of Seattle. Business Taxes A business operating across multiple Washington cities can face overlapping local obligations. Washington cities use a model ordinance with apportionment rules so the same income is not fully taxed by more than one city, but tracking multiple local tax codes is still real work.
Other states impose gross receipts taxes that operate like B&O but go by different names. Ohio’s Commercial Activity Tax applies once taxable gross receipts exceed $6 million a year, charged at 0.26% above that threshold.4Ohio Department of Taxation. Commercial Activity Tax (CAT) Nevada’s Commerce Tax applies to businesses exceeding $4 million in Nevada gross revenue, with rates varying by industry.5State of Nevada Department of Taxation. Commerce Tax FAQs Delaware, Oregon, Tennessee, and Texas also impose some form of gross receipts tax. One common source of confusion: Portland, Oregon’s Business License Tax sounds similar but is actually a net income tax, not a gross receipts tax.6City of Portland. Business Tax Filing and Payment Information
Washington’s Classifications and Rates
Washington’s B&O tax does not use a single flat rate. Business activities are sorted into classifications, each with its own rate:7Washington Department of Revenue. Business and Occupation (B&O) Tax
- Retailing: 0.471% of gross receipts
- Wholesaling: 0.484% of gross receipts
- Manufacturing: 0.484% of gross receipts
- Service and Other Activities: 1.5% to 2.1% of gross income, depending on prior-year revenue
The service rate changed significantly starting January 1, 2026. Businesses with less than $1 million in prior-year service income pay 1.5%. Those with prior-year service income between $1 million and just under $5 million pay 1.75%. Businesses at $5 million or above pay 2.1%. Hospitals and certain advanced computing businesses are exempt from the higher tiers and remain at 1.5% regardless of revenue.8Washington Department of Revenue. Service and Other Activities Rate Changes
Getting the classification right matters. A professional services company that mistakenly reports revenue under retailing pays the wrong rate, and when the Department of Revenue catches the error on audit, the business owes the difference plus penalties and interest. If your business does more than one type of activity, report each under its own classification and pay the corresponding rate on each.
Deductions and Credits That Reduce What You Owe
The B&O statute does allow specific deductions that narrow the taxable base. The most valuable one for many businesses covers interstate sales: when goods are shipped to and accepted by a buyer outside Washington, those receipts can be deducted. The deduction exists to keep the tax from running afoul of the Commerce Clause. It applies whether you ship via your own trucks, a freight carrier, or a consolidator, as long as the buyer receives the goods outside the state.9City of Seattle. Directors Rule 5-031 – Measure of Tax – Retailers and Wholesalers Documentation is essential. Claim the interstate deduction without shipping records showing out-of-state delivery and the deduction is disallowed, making the full gross amount taxable.
Other statutory deductions include amounts derived from previously reported bad debts, certain payments to subcontractors, and receipts from sales where the buyer provides a resale certificate.
Multiple Activities Tax Credit
When a single product moves through more than one taxable stage inside the same business, the Multiple Activities Tax Credit prevents double taxation on the same revenue. A company that manufactures a product in Washington and then sells it at retail in Washington would otherwise owe manufacturing B&O tax on the product’s value and retailing B&O tax on the sale price. The credit allows the effective tax to be paid only once.10Washington Department of Revenue. Multiple Activities Tax Credit (MATC) You still report each activity under its proper classification, then take the credit on your return. The credit cannot exceed your Washington B&O liability, and the taxes creating the credit must actually be paid before you claim it.
Small Business B&O Credit
Washington also offers a small business credit that reduces or eliminates B&O tax for the smallest filers. The threshold depends on filing frequency and whether more than half your taxable income falls under the Service classification. For annual filers with income primarily from non-service activities, the credit applies when total B&O liability is below $1,320 for the year. Service-heavy businesses get a higher threshold of $3,840 annually. Monthly and quarterly filers have proportionally lower per-period thresholds.11Washington Department of Revenue. Credits The credit phases out as liability rises, so businesses just above the threshold still receive a partial credit rather than losing it entirely.
Who Is Fully Outside the B&O System
Public utilities in Washington do not pay B&O tax. They pay a separate Public Utility Tax under a different chapter of state law, covering transportation, communications, electrical power, natural gas and water distribution, sewerage collection, and railroads.12Washington Department of Revenue. Public Utility Tax The B&O statute explicitly excludes any activity already subject to the Public Utility Tax.13Washington State Legislature. Chapter 82.04 RCW – Business and Occupation Tax
Out-of-State Sellers and the $100,000 Threshold
You do not need a physical office or warehouse in Washington to owe B&O tax. Since January 2020, any business with more than $100,000 in combined gross receipts sourced to Washington in the current or prior year must register, report B&O tax, and collect applicable sales tax.14Washington Department of Revenue. Out of State Businesses Reporting Thresholds and Nexus That threshold catches e-commerce sellers and remote service providers who often do not realize they have a Washington obligation. It covers all receipts attributed to Washington, not just sales of goods; service revenue, royalties, and other income sourced to Washington all count.
Filing Frequency and Due Dates
How often you file depends on how much you owe. Washington assigns filing frequency based on estimated annual B&O liability:15Washington Department of Revenue. Filing Frequencies and Due Dates
- Annual filing: liability of $1,050 or less per year
- Quarterly filing: liability between $1,051 and $4,800 per year
- Monthly filing: liability above $4,800 per year
Some industries have different defaults. Construction and restaurant businesses file at least quarterly regardless of liability, and auto dealers file monthly. The Department of Revenue can reassign your frequency if your actual liability consistently lands in a different bracket.
On each return, list gross receipts for each classification separately, apply any deductions to reach net taxable amount per classification, and multiply by the corresponding rate. The total across classifications is your B&O tax due. Washington requires electronic filing and electronic payment for most businesses, with limited exceptions for very small filers.
Penalties for Late Filing
Missing a B&O deadline triggers automatic penalties that escalate quickly:16Washington State Legislature. Revised Code of Washington 82.32.090 – Late Payment – Disregard of Written Instructions – Evasion – Penalties
- 9% penalty if the tax is not paid by the due date
- 19% total penalty if still unpaid by the last day of the following month
- 29% total penalty if still unpaid by the last day of the second month after the due date
These are total penalties, not additive. Pay two months late and you owe 29% on top of the original tax, not 9% plus 19% plus 29%. The minimum penalty is $5.
The most severe consequence is the evasion penalty: 50% of the additional tax due. It applies when the Department of Revenue finds that a deficiency resulted from intentional fraud or deceit rather than an honest mistake. The department must prove intent through clear, cogent, and convincing evidence, so this penalty is reserved for genuinely fraudulent conduct rather than bookkeeping errors.