Plumber License in Missouri

Quick Answer

Missouri requires plumber contractors to hold a county/city only. A state exam is required. Application fees start at $100-$275. Licenses renew biennial.

License Requirements

License Type: County/City Only
Exam Required: Yes — state or trade exam required
Experience: 3+ years in plumber
Insurance: $200,000 general liability
Bond: $5,000-$10,000

Fees

Application Fee: $100-$275
Exam Fee: $50-$120
License Fee: $100-$200
Renewal Fee: $75-$175 (Biennial)

Governing Body

Missouri State Plumbing Board
Official Application Portal ↗
Renewal: Every biennial
No formal reciprocity

How to Get a Plumber License in Missouri

Step-by-step application process.

Verify you meet the experience requirement (3+ years in plumber)
Obtain required insurance: $200,000 general liability
Obtain surety bond: $5,000-$10,000
Pass the required exam — schedule through the state exam provider
Submit application to Missouri State Plumbing Board
Pay applicable fees and await license issuance (typically 2–8 weeks)

Important Notes

Missouri requires licensed plumbers for most plumbing work. Master Plumber and Journeyman Plumber licenses available. Local permits required for each project.

Frequently Asked Questions

Do I need a license to do plumber work in Missouri?

Yes. Missouri requires plumber contractors to hold a county/city only. Missouri requires licensed plumbers for most plumbing work. Master Plumber and Journeyman Plumber licenses available. Local permits required for each project.

How much does a plumber license cost in Missouri?

In Missouri, the application fee is typically $100-$275. Exam fees are $50-$120. License fees are $100-$200. Renewal is $75-$175 per biennial cycle.

Is an exam required for a plumber license in Missouri?

Yes, Missouri requires passing a licensing exam for plumber contractors. The exam typically covers state laws and regulations plus trade-specific knowledge.

How do I renew my plumber license in Missouri?

Missouri plumber licenses renew biennial. Renewal fees are $75-$175. Many states require continuing education for renewal. Contact Missouri State Plumbing Board for current renewal requirements.

Does Missouri have reciprocity for plumber licenses?

Missouri currently has limited formal reciprocity for plumber licenses. Contact Missouri State Plumbing Board to discuss your situation — experience from other states may still be credited.

Plumber Licensing in Neighboring States

Compare requirements in nearby states — useful if you work across state lines.