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Washington Department of Revenue compliance

Washington Department of Revenue compliance

ComplianceKaro Team
May 11, 2026
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To ensure compliance with the Washington Department of Revenue (DOR), businesses must register with the WA DOR and obtain a Unified Business Identifier (UBI) if their gross income is $12,000 per year or more, if they sell taxable goods/services, or if they meet nexus thresholds.

A state Tax Registration is required under these conditions, with no additional fee. Businesses must file for a Business License through the Business Licensing Wizard.

Certain entity types, such as LLCs and Corporations, are required to register with the Secretary of State before applying for a business license. The Business & Occupation (B&O) tax is levied on gross receipts, with different classifications and rates depending on the business activity.

Businesses that sell taxable goods or services are required to collect and remit retail sales tax. Reseller permits allow businesses to purchase items for resale without paying sales tax.

Filing and payment processes are handled using myDOR, the DOR's online portal. Filing frequencies and due dates vary based on the tax type and business volume, with schedules and 'file-pay' pages available on the DOR website.

Penalties and interest may apply for late filings or payments, though the DOR does offer guidance, and in some cases, disaster relief or payment arrangements. Key resources include the Business Licensing Service (360-705-6741), the DOR general contact (360-705-6705), and the online myDOR portal.

Additional guidance for small businesses, including checklists for opening a business, is available from business.wa.gov, covering steps like registering with the Secretary of State, applying for a Business License, reporting new employees, obtaining reseller permits, and renewing licenses and filing Annual Reports.

To ensure compliance with the Washington Department of Revenue (DOR), businesses must register with the WA DOR and obtain a Unified Business Identifier (UBI) if their gross income is $12,000 per year or more, if they sell taxable goods/services, or if they meet nexus thresholds.

A state Tax Registration is required under these conditions, with no additional fee. Businesses must file for a Business License through the Business Licensing Wizard.

Certain entity types, such as LLCs and Corporations, are required to register with the Secretary of State before applying for a business license. The Business & Occupation (B&O) tax is levied on gross receipts, with different classifications and rates depending on the business activity.

Businesses that sell taxable goods or services are required to collect and remit retail sales tax. Reseller permits allow businesses to purchase items for resale without paying sales tax.

Filing and payment processes are handled using myDOR, the DOR's online portal. Filing frequencies and due dates vary based on the tax type and business volume, with schedules and 'file-pay' pages available on the DOR website.

Penalties and interest may apply for late filings or payments, though the DOR does offer guidance, and in some cases, disaster relief or payment arrangements. Key resources include the Business Licensing Service (360-705-6741), the DOR general contact (360-705-6705), and the online myDOR portal.

Additional guidance for small businesses, including checklists for opening a business, is available from business.wa.gov, covering steps like registering with the Secretary of State, applying for a Business License, reporting new employees, obtaining reseller permits, and renewing licenses and filing Annual Reports.

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