The essentials
- Licensing authorityNo statewide plumbing licensing board — licensing is handled by cities and counties under Mo. Rev. Stat. Chapter 341 — official site
- Statewide?No — licensed by city or county
- Experience requiredNot published in a form we could verify — confirm with the board
- ExamLocal board of examiners; Chapter 341 requires examination for journeyman and master certification in cities over 15,000 population and in first-classification counties
- Renewal & CENot published in a form we could verify — confirm with the board
- Bond / insuranceMo. Rev. Stat. Chapter 341 requires master plumbers and master drainlayers to deposit a surety bond; amounts and any insurance minimums are set by the local jurisdiction
- ReciprocityNone we could confirm
License classes in Missouri
Because Missouri licenses locally, the exact tier names differ between jurisdictions. These are the classes you will most often encounter:
- Journeyman Plumber — certificate issued by the local board of examiners
- Master Plumber — locally issued certificate; may contract and pull permits
- Master Drainlayer — separate local certificate in some jurisdictions
- Apprentice — defined locally, no uniform state tier
Experience and training
We could not find a published hour requirement for Missouri that we were willing to state as fact, so we have left it blank rather than guess. Ask No statewide plumbing licensing board — licensing is handled by cities and counties under Mo. Rev. Stat. Chapter 341 for the current experience requirement in writing, and ask specifically whether classroom or trade-school hours can offset field hours — that substitution is where most of the variation between states lives.
One thing worth knowing regardless of state: the hours only count if they were logged properly at the time. Several boards require you to register as an apprentice before the clock starts, and hours worked while unregistered are simply gone. If you are early in the trade, get the registration paperwork right now rather than reconstructing it four years later.
The exam
Local board of examiners; Chapter 341 requires examination for journeyman and master certification in cities over 15,000 population and in first-classification counties
Renewal and continuing education
Confirm the renewal cycle and continuing-education requirement with No statewide plumbing licensing board — licensing is handled by cities and counties under Mo. Rev. Stat. Chapter 341.
Letting a license lapse is more expensive than it looks. Some states allow a short grace period with a penalty fee; others treat a lapsed license as forfeited and make you retest from scratch. Put the renewal date in your calendar with a 90-day warning, not a 7-day one.
Insurance and bonding
Mo. Rev. Stat. Chapter 341 requires master plumbers and master drainlayers to deposit a surety bond; amounts and any insurance minimums are set by the local jurisdiction
Separately from whatever the state requires: Pipe Well requires every plumber on the network to carry current general liability insurance and to upload the certificate before the first appointment is sent.
Working across state lines
We could not confirm any published reciprocity agreement for Missouri. That does not always mean there is none — several states evaluate out-of-state licenses case by case, or let you sit for the exam on the strength of a license held elsewhere. If you are relocating, call the board and ask specifically about endorsement or credential review rather than assuming you start over.
What plumbers actually get wrong here
Missouri issues no state plumbing license at all — requirements depend entirely on the city or county where the work is performed, and St. Louis and Kansas City each run their own licensing, bonding and renewal programs. Statute triggers a local board of examiners in cities over 15,000 and in first-class counties (which may create a department of plumbing and sewer inspection); smaller municipalities may have minimal or no requirements, and a card from one jurisdiction generally does not transfer to another.
Once you are licensed: getting the work
A license gets you legal. It does not get you a full schedule. The usual next step is buying leads — $40 to $85 for a contact that three or four other shops bought at the same moment, which at a realistic 10–20% close rate works out to somewhere between $300 and $1,000 for every job you actually book, plus the unpaid hours spent chasing the ones that go nowhere.
Pipe Well works the other way round. We book appointments, not leads, and we handle everything up to the moment you knock on the door: the advertising, the phone call, qualifying the job, getting the address and access details, and agreeing a date and time window with the homeowner. What reaches your phone is a scheduled appointment — name, address, time window and what is wrong. You reply YES and it is yours.
What it costs
Nothing to join. No subscription, no per-lead charge. You do the job, you set your own price, and you collect payment from the customer directly. Then Pipe Well is paid 50% of the job after your documented materials come off the top:
(amount collected − documented materials) × 50%
| Collected | Materials | Net | Pipe Well | You keep |
|---|---|---|---|---|
| $400 | $40 | $360 | $180 | $220 |
| $1,200 | $520 | $680 | $340 | $860 |
| $2,800 | $800 | $2,000 | $1,000 | $1,800 |
| $8,500 | $3,200 | $5,300 | $2,650 | $5,850 |
Due within 48 hours of the customer paying you. If they never pay, you owe nothing. And look honestly at that last row — on a big repipe our share is a large number. If your book is already full of $8,500 jobs you are better off filling that capacity yourself. We are worth most to a shop with open capacity it cannot currently fill.
Apply free → Run your own numbersQuestions plumbers ask about licensing in Missouri
Do you need a license to do plumbing work in Missouri?
Missouri does not issue a single statewide plumbing license. Licensing is handled by cities and counties, which means the requirement depends entirely on where the work is performed, and a card issued by one jurisdiction generally carries no weight in the next one. Missouri issues no state plumbing license at all — requirements depend entirely on the city or county where the work is performed, and St. Louis and Kansas City each run their own licensing, bonding and renewal programs. Statute triggers a local board of examiners in cities over 15,000 and in first-class counties (which may create a department of plumbing and sewer inspection); smaller municipalities may have minimal or no requirements, and a card from one jurisdiction generally does not transfer to another.
Who issues the plumbing license in Missouri?
No statewide plumbing licensing board — licensing is handled by cities and counties under Mo. Rev. Stat. Chapter 341. The official site is https://revisor.mo.gov/main/OneChapter.aspx?chapter=341.
What license classes exist in Missouri?
Journeyman Plumber — certificate issued by the local board of examiners. Master Plumber — locally issued certificate; may contract and pull permits. Master Drainlayer — separate local certificate in some jurisdictions. Apprentice — defined locally, no uniform state tier.
How many hours of experience do you need for a Missouri plumbing license?
We could not verify a published hour requirement for Missouri from an official source, so we are not going to guess at one. Check directly with No statewide plumbing licensing board — licensing is handled by cities and counties under Mo. Rev. Stat. Chapter 341.
Who administers the Missouri plumbing exam?
Local board of examiners; Chapter 341 requires examination for journeyman and master certification in cities over 15,000 population and in first-classification counties
How often does a Missouri plumbing license renew?
Confirm the renewal cycle and any continuing education requirement with No statewide plumbing licensing board — licensing is handled by cities and counties under Mo. Rev. Stat. Chapter 341.
Can I get booked plumbing appointments in Missouri once I am licensed?
Yes. Pipe Well Plumbing books customer appointments in Missouri and texts them to licensed plumbers whose service radius covers the address. Joining is free — no subscription and no per-lead fee. Pipe Well is paid 50% of the job after your documented material costs are deducted, and only after the customer has paid you.
Booked appointments in Missouri
Set your ZIP and a service radius of at least 30 miles and we will match appointments inside it. Free to join.
Join Free → Plumbing jobs in MissouriPlumbing license requirements in other states
Compiled from No statewide plumbing licensing board — licensing is handled by cities and counties under Mo. Rev. Stat. Chapter 341 published materials, last reviewed July 2026. Where a figure could not be verified against a primary source we have said so rather than estimate it. Spotted something out of date? Email info@pipewellplumbing.com and we will correct it.