How to become a plumber in Wisconsin

The path in Wisconsin, step by step

Wisconsin licenses plumbing work at the state level through the Wisconsin Department of Safety and Professional Services (DSPS). These are the steps it lays out, in order.

1. Register with DSPS as a plumbing apprentice and work under licensed plumbers.
2. Earn your Journeyman Plumber license.
3. Work at least 1,000 hours a year for 3 years as a licensed journeyman.
4. Apply for the Master Plumber license in LicensE with the Trades Experience Form and pay the fees.
5. Pass the open-book master exam with 70% or better.
6. Renew every 4 years by March 31 with 24 hours of continuing education.

The full license guide, with every fee and form: plumbing license in Wisconsin.

Finding an apprenticeship in Wisconsin

Wisconsin runs Registered Apprenticeship through its own State Apprenticeship Agency, recognized by the U.S. Department of Labor to register and oversee programs there. Its staff are state employees, and it may use the federal paperwork or forms of its own. Apprenticeship.gov lists the Wisconsin State Apprenticeship Agency as the contact.

Either way, a registered program means paid work with a mentor, raises as you progress, classroom instruction and a credential recognized in every state. Search open spots in the Apprenticeship Job Finder.

Across the country. Most plumbers learn the trade in a 4 or 5 year apprenticeship, with about 2,000 hours of paid on-the-job training plus some classroom instruction each year.

License levels and exams in Wisconsin

The license to aim for: Master Plumber license.

Trade exam. Yes. The master plumber exam is open book with a passing score of 70%, given at Pearson and DSPS exam locations.

Keeping it. The Master Plumber license is valid for 4 years and renews by March 31, with 24 hours of approved continuing education. The renewal fee is $500.

Coming from another state. Out-of-state plumbers can apply through a comity pathway, but must still pass the Wisconsin exam.

What the Wisconsin license costs

The fees the Wisconsin Department of Safety and Professional Services (DSPS) lists. Exam fees from a testing company, insurance and any bond come on top.

What plumbers earn in Wisconsin

The median plumber in Wisconsin earned $39.04 an hour in May 2025, 7th of 51 states, with 10,210 on payrolls. The national median was $30.67.

At the bottom of the range, a quarter of plumbers in Wisconsin earned under $29.53 an hour and a tenth under $24.05. At the top, a quarter earned over $49.79 and a tenth over $57.72.

Every state, the neighbors and what a business should charge: plumber salary in Wisconsin.

Jobs ahead in Wisconsin

Wisconsin's labor market office projects jobs for plumbers growing from 7,610 in 2022 to 8,380 in 2032, a change of 10.1%. Counting people who retire or change careers, that is about 760 openings a year.

Jobs are projected to grow 10.1% from 2022 to 2032, faster than the 2.3% projected nationally, ranking 18th of the 50 states in the file.

These are the state's own long-term projections, published together on Projections Central for the occupation group plumbers, pipefitters, and steamfitters.

Starting your own plumber business in Wisconsin

To contract on your own in Wisconsin, the license is the Master Plumber license.

Pricing comes next. Paying yourself the Wisconsin median of $39.04 an hour, the labor rate calculator's starting numbers (one person, 2 unbilled hours a day, $90,000 of overhead, 15% profit) come to $139.15 per billable hour. Try your own in the plumber labor rate calculator.

The full checklist is in how to start a plumbing business. The free Koira Office plan gives you a website on a Koira address, estimates customers sign with a deposit, invoices with card payments and your day's jobs in one place, with no per-person fee. See the plans.