Plumbing Contractor Permit Requirements in Kansas City, MO

Complete permit and license guide for starting a plumbing contractor in Kansas City, Jackson County, Missouri.

Updated 2026-03-14 5 stops $400–$1,200 est. 4–10 weeks to obtain all licenses
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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

1 stop

  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)

State of Missouri

1 stop

  1. Missouri Department of Revenue — Sales Tax License

    Required for all businesses selling taxable goods in Missouri. The state rate is 4.225%; local rates vary by city and county. Register online with the Missouri Department of Revenue.

    Official government source

    FreeImmediate (online application)

City of Kansas City / Jackson County

3 stops

  1. Missouri Plumbing Contractor License (local jurisdictions)

    Missouri plumbing licenses are issued at the local level. Kansas City and St. Louis both require Master Plumber licenses for business owners.

    Official government source

    Varies by city ($100–$300)2–6 weeks

  2. Kansas City City Clerk / Revenue Division — Business License

    Kansas City requires a Business License from the City Clerk's office for all businesses with a physical presence or doing business within city limits. This license must be renewed annually and displayed at your place of business.

    Official government source

    $50–$500/year depending on business type and gross revenues1–3 weeks

  3. Jackson County / Kansas City Plumbing Permit (per project)

    A separate permit must be pulled with the local building/plumbing department for each job. Inspections are required upon job completion.

    Official government source

    $50–$300 per project1–5 business days

Terminus

Open for business — est. $400–$1,200 · 4–10 weeks to obtain all licenses

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Official Sources

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