Pest Control Permit Requirements in Seattle, WA

Complete permit and license guide for starting a pest control in Seattle, King County, Washington.

Updated 2026-03-15 6 stops $400–$1,200 est. 6–10 weeks to obtain all licenses and pass required exams
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Not legal advice. Requirements may change — always verify with your local government authority before applying. This guide was compiled from public and official sources (last updated ) and has not yet been independently source-verified — confirm each requirement before acting on it.

Federal — start here

2 stops

  1. EIN (Employer Identification Number)

    Required if you have employees or operate as an LLC or corporation. Free from the IRS.

    Official government source

    FreeImmediate (online application)

  2. EPA Federal Pesticide Requirements

    Federal law (FIFRA) requires all pesticide applicators to use only EPA-registered products and follow label instructions. Commercial applicators must maintain application records for at least 2 years.

    Official government source

    No federal feeOngoing compliance

State of Washington

2 stops

  1. Washington — Commercial Pesticide Applicator License

    Washington requires pest control businesses and applicators to be licensed by the Washington State Department of Agriculture (WSDA). All individuals applying pesticides commercially must hold a Commercial Pesticide Applicator license. Businesses must also be registered.

    Official government source

    $35 exam fee; $100 business registration4–8 weeks

  2. Washington — Sales Tax / Business Registration

    Washington imposes Business and Occupation (B&O) tax on pest control services. Register with DOR.

    Official government source

    No fee1–2 weeks

City of Seattle / King County

2 stops

  1. Seattle — General Business License

    Seattle requires all businesses operating within city limits to obtain a general business license from the city. Pest control companies must renew annually and may be subject to additional zoning review.

    Official government source

    $50–$200/year1–3 weeks

  2. Washington State Department of Agriculture — Pesticide Applicator License

    Washington requires pest control businesses and applicators to be licensed by the Washington State Department of Agriculture (WSDA). All individuals applying pesticides commercially must hold a Commercial Pesticide Applicator license. Businesses must also be registered.

    Official government source

    $35 exam fee; $100 business registration4–8 weeks (exam scheduling and processing)

Terminus

Open for business — est. $400–$1,200 · 6–10 weeks to obtain all licenses and pass required exams

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Official Sources

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