How to Get Your California C-36 Plumbing License: Step-by-Step (2026)

# How to Get Your California C-36 Plumbing License: Step-by-Step (2026)

Getting your California C-36 plumbing contractor license is a clear, well-defined process — but there are more steps than most people expect, and the order matters. Here is the full roadmap, from qualifying experience to the license landing in your hands.

Step 1: Make sure you qualify (4 years of experience)

To sit for the C-36 exam, you need at least four full years of journey-level plumbing experience within the last ten years. That experience can be as a journeyman, foreman, supervising employee, or contractor. It must be verifiable — someone with firsthand knowledge of your work has to certify it on CSLB Certification of Work Experience form. Technical training or an apprenticeship can substitute for part of the four years, but at least one year must be hands-on practical experience. You also must be at least 18.

Step 2: File your application ($450)

Submit CSLB Application for Original Contractor License and pay the $450 processing fee. On the application you list your qualifying experience and choose the C-36 classification. Important: do not send your bond or license fee yet — those come after you pass the exams.

Step 3: Schedule and pay for your exams through PSI

Once CSLB reviews and approves your application, you will be cleared to test. As of 2025, you schedule each exam and pay the exam fee directly through PSI (this replaced the older pay-CSLB process). You take the exams at a PSI computer testing center.

Step 4: Pass both exams

You must pass two exams:

• The Law and Business exam
• The C-36 plumbing trade exam

Each is computer-based multiple choice with 3.5 hours allowed. You generally have 18 months from your approved application to pass both. If you fail one, you must wait 21 days before you can pay and reschedule that exam — and if you passed the other, that result stays valid while you retake. Not sure how tough it is? Read How Hard Is the California C-36 Plumbing Exam? and our Law and Business exam guide.

Step 5: Post your $25,000 bond and pay the license fee

After you pass, CSLB sends instructions to finish licensing. Before the license is issued you must:

• File a $25,000 contractor bond (the current amount since January 1, 2023). This is the bond face amount — you pay an annual premium, usually a few hundred dollars depending on your credit.
• Pay the initial license fee — $200 for a sole owner or $350 for a non-sole owner (this covers your first two-year term).

Step 6: Fingerprinting and final requirements

You will complete Live Scan fingerprinting for a DOJ and FBI background check. If you will have employees, you must carry workers compensation insurance (and depending on classification and current rules, you may need coverage or a valid exemption even without employees — confirm your situation on CSLB workers comp page). Once CSLB has your passing exams, bond, fees, fingerprint clearance, and insurance or exemption on file, your license is issued and you are officially a licensed C-36 contractor.

How long does it take, and what does it cost?

Timelines vary with CSLB processing and how quickly you test, but many applicants finish in a few months. All-in costs — application, initial license fee, exam fees, fingerprinting, and your first-year bond premium — typically land around $700 to $1,100, before study materials. Always confirm current fees on the CSLB fees page, since they change.

The one step you actually control

Most of this process is paperwork and waiting. The part fully in your hands — and the part that stops people — is passing the two exams. That is where focused preparation pays off. Our C-36 course modules cover every topic on both exams with practice questions in the real format. Create a free account to start.