Plumber License Guide 2026

Plumber licensing in 2026 is regulated state-by-state: verified pre-license education ranges from 48 hours, the exam is most commonly administered by PSI, and published first-attempt pass rates are not consistently published. A background check is required in 1 of 11 states with verified data.

By The LicenseFig Editorial Team · independent editorial research project

Installs and repairs water, gas and drainage systems. Journeyman plumber licenses vary by state and locality; many require apprenticeship hours plus an exam.

National overview — Plumber at a glance

State-by-state essentials (top verified states)

How to get a Plumber license — step by step

1. 1

   Meet the basic requirements

   Minimum age is 18 in every state with a published figure. A criminal background check is required in 1 of 11 verified states.

2. 2

   Complete pre-license education

   Approved training hours run from 48 hours across verified states. Choose a state-approved program; your school reports completion to the licensing authority.

3. 3

   Register and pass the exam

   The exam is most often administered by PSI, with a 70% passing score. Schedule through the vendor portal after your education is reported.

4. 4

   Pay fees and submit your application

   Expect an exam fee of $40–202.1 and an application fee of $40–100. Submit any required background check results with your application.

5. 5

   Maintain your license

   The most common renewal cycle is every 1 years. Track continuing-education deadlines so your license never lapses.

Frequently asked questions

This guide is informational and not legal advice. Requirements change frequently — verify all figures with your state licensing board (data retrieved 2026-08-20).