How Long Does It Take to Get a Plumber License?

The Short Answer: Two Years or More

For a Journeyman Plumber license through the standard Trainee path, the minimum is two years in Maine — and that's only if you're on the fastest possible track. The actual timeline depends on which license tier you're pursuing and which experience pathway you use.

Maine's Plumbers' Examining Board recognizes five license levels: Trainee, Student Trainee, Journeyman-in-Training (JIT), Journeyman, and Master. Each has its own requirements, and experience hours count only after the applicable credential is active.

Trainee to Journeyman: Two to Four Years

The standard path to a Journeyman Plumber license requires 4,000 hours of supervised field work over at least two years as a licensed Trainee. At 40 hours per week, 50 weeks per year, that's exactly two years of full-time work — but seasonal slowdowns, employer changes, and documentation gaps push most candidates closer to three.

There's a faster route if you graduate from an approved plumbing program. Graduates of a one-year community college program or a two-year secondary career and technical education program can apply for a Journeyman-in-Training license, which cuts the field hour requirement to 2,000 hours. That's roughly one year of full-time work after graduation, but the JIT license is non-renewable and expires after four years. If you do not complete the hours within that window, you must meet the requirements for the licensing path you pursue next.

After logging hours, you still need Board approval on your exam application, scheduling time with Prov (the testing provider), and processing time for your final license application.

Journeyman to Master: One to Four More Years

Once you hold a Journeyman license, the Master Plumber credential requires an additional 2,000 hours (minimum one year) of work under a Master Plumber's supervision.

There's also a direct Trainee-to-Master pathway that skips the Journeyman tier entirely: 8,000 hours (minimum four years) under a Master Plumber. This route makes sense for tradespeople who started working before the JIT pathway existed or who always planned to run their own shop.

The Master exam requires a 75% passing score (compared to 70% for Journeyman), so many candidates spend additional weeks preparing.

Where Time Actually Gets Lost

The official hour requirements tell only half the story. Here's where real timelines stretch:

Unsigned affidavits. Your supervising Master Plumber must sign a notarized Experience Affidavit verifying your hours. If that person retired, moved out of state, or closed their business, you'll need to track them down or compile alternative documentation. This alone has stalled candidates for months.

Incomplete applications. The Board returns applications that are missing documentation without processing them. Each rejection-and-resubmission cycle adds weeks. Common mistakes include forgetting the $21 criminal background check fee, omitting certified transcripts, or submitting un-notarized affidavits.

Exam scheduling gaps. After the Board approves your application, you receive an authorization email with instructions for scheduling through Prov. Testing centers are located in Auburn, Bangor, Calais, Portland, and Presque Isle — but available slots fill up, especially in summer construction season.

Hours that don't count. Any work performed without a valid, active trainee license doesn't count toward your total. The same applies to work done without direct, on-site supervision from a licensed Journeyman or Master. There are no carve-outs for "simple" tasks.

Realistic Timeline Summary

What You Can Control

Start your trainee registration before your first day on a job site — not after. Keep a personal log of every shift with dates, hours, and the license number of your supervising plumber. Get affidavits signed while you're still working for that employer, not years later when you need them for your exam application.

The Maine Plumber License Guide walks through every step from trainee registration to master license activation, including templates for tracking your hours and checklists for each application stage.

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