Adaptive drills
Every wrong answer reweights your plan. You spend more reps on what's still shaky, not what you already know.
California CSLB · Contractor License Exam Prep
California contractor license exam prep, online and self-paced.
Practice California-specific questions for your contractor trade exam and Law & Business on any device, with instant rationales and readiness tracking. No classroom required.
Site content in 4 languages, with AI tutor support in 8.
Practice online before exam day; applications, scheduling, testing, and licensing happen outside Test2Pro.
Free practice test
Try a free practice test
Try original exam-style questions with instant explanations — no login required.
- Sample question set
- Instant explanations
- No login
- Topic feedback for the sample
CONTENT MAPPED TO CURRENT CODE REFERENCES · UPDATED QUARTERLY
NEC 2023 Aligned
IAPMO UPC 2024
AWS D1.1
EPA 608
NABCEP PV
CSLB Topics
NFPA 70E
Mechanical Code
9.1k+
practice questions
All written & reviewed by credentialed tradespeople
3/6months
access length options
Fits your study schedule
20
questions in the free test
Results by topic after completion
8
AI assistant languages
EN · ES · ZH · TL · VI · KO · HY · RU
01 · ExamsPick your trade.
Pick your trade.
We've already mapped the blueprint.
Every exam prep package is built from the official content outline — so your practice covers every domain the real test can touch, weighted the way the test weights it.
02 · How it works
Four steps from "where do I start" to test-day confident.
01 Pick your exam Choose your California classification — B General Building, C-10 Electrical, or Law & Business. We pull the current CSLB content outline and build your plan against it.
02 Take the diagnostic A 20-minute adaptive quiz finds your weak domains. No guessing what to study — your plan is built around what you actually need.
03 Drill with AI Pro Every miss gets a plain-English breakdown. Ask follow-ups. Switch languages. Save the ones you still don't get.
04 Full mock exam Practice with a timer and exam-style questions. Use your results to identify topics that need more review before exam day.
03 · What's inside
Built for how trade candidates actually study.
Short reps, honest feedback, and a tutor that speaks your language.
AI Pro tutor
On every question: plain-English explanations, deeper hints, and follow-up questions. Ask in your language.
Real-exam mocks
Practice pacing and answering exam-style questions. Review your results by topic to plan your next session.
Code-referenced
Questions that depend on a code citation are reviewed against the applicable NEC, UPC, IMC, or other current reference.
AI Pro in your language
When a question needs more context, ask AI Pro in your language while you practice.
Topic-mapped practice
Focused practice built by credentialed California tradespeople and organized around published exam topic areas.
04 · Reviews
Tradespeople who stopped guessing.
"The diagnostic showed exactly where my C-10 prep was thin. I could focus my study blocks instead of rereading everything."
MR
Marcus R.
C-10 Electrical Candidate
"AI Pro help in my language was the difference. Spanish is my first language, and I could actually understand the NEC reasoning."
LH
Luis H.
C-10 Candidate
"The B prep finally put trade topics and Law & Business in one place. My weekly plan stayed focused instead of scattered."
KD
Kendra D.
B General Building Candidate
"Law & Business was the exam I worried about most — the wording, not the work. The drills put contracts, liens, and payroll rules in plain language, and nothing surprised me on test day."
EV
Elena V.
Law & Business Candidate
05 · PricingStart with your trade exam.
Start with your trade exam.
Bundle what most applicants actually need.
Every plan includes the full question bank, timed practice, and progress tracking. AI Pro is free for everyone.
Start here
Trade exam prep package
From
$199
Starting trade package
Start with the prep package for the classification you are testing for.
Question bank
Timed practice
Mock exams
Weak-area tracking
Common package
Law & Business bundle
Add to package
+$100
Business-law prep, bundled
Covers the business-law side most California contractor applicants pair with their trade exam.
One checkout path
Trade exam + business-law prep
Access length selected at checkout
Included
AI Pro included
AI Pro is free for everyone. Get explanations, ask follow-up questions, and study in your language.
8 supported languages
Expanded hints
Follow-up questions
The price covers digital exam prep for your selected access period. AI Pro is free for everyone. Exam registration and licensing fees are separate; purchases do not guarantee an exam result.
06 · FAQ
Answers to the real questions.
How does Test2Pro help me prepare?
Practice follows the published exam topics. Work through questions, review explanations, and use your results to choose what to study next.
How often do you update content for new codes?
Question banks are reviewed quarterly and whenever a relevant code cycle changes. Questions that depend on a code citation are checked against the current edition listed for that exam.
Can I use Test2Pro in Spanish (or another language)?
Yes. The site interface is available in 4 languages: English, Spanish, Chinese, and Russian. Practice translation and AI Pro support 8 languages, including Tagalog, Vietnamese, Korean, and Armenian.
What if I just want a free taste?
Start with the Starter experience: sample questions, basic explanations, and no card required. AI Pro is free for everyone. Paid prep unlocks the full question bank.
Pick your California exam prep bundle
Start with your California classification: B General Building, C-10 Electrical, or Law & Business. Most applicants bundle Law & Business with their trade exam.
TEST-DAY READY
Walk into the exam room
like you've been there before.
Start with a free diagnostic. See your weak areas in 20 minutes and build a focused study plan.
Get your weak-area map in 20 minutes
Focused study plan tailored to your exam
AI tutor in your language 8 supported languages
Full-length mock when ready same feel as test day