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Colorado license examsElectrician and Plumber

Colorado tests electrician and plumber license applicants. Each trade has its own exam and testing company.

Journeyman and master exams in Colorado

Electrician

Who gives it: PSI Services LLC¹
Code book: 2023 National Electrical Code
Open book: Yes
Exam fee: $78

Hours and license steps

Plumber

Who gives it: PSI Services LLC²
Code book: 2018 International Plumbing Code and International Residential Code (editions referenced for the exams)
Open book: Yes

Hours and license steps

How do you book the exam?

Apply to the Division of Professions and Occupations first. The board approves your application, then tells you how to schedule with the testing company. Division of Professions and Occupations

Sources

Colorado electrician license: exam (test-takers.psiexams.com, 2026-10-27)
Colorado plumber license: exam (dpo.colorado.gov, 2026-10-27)