TL;DR: A California Commercial Driver License (CDL) comes in three classes — Class A (combination vehicles over 26,000 lbs with trailers over 10,000 lbs), Class B (single vehicles over 26,000 lbs), and Class C commercial (passenger or hazardous-materials vehicles under 26,000 lbs). Since February 2022, federal Entry-Level Driver Training (ELDT) is required before you can even take the CDL knowledge test. This guide explains class selection, ELDT, the DOT physical, endorsements (H, N, P, S, T, X), and the current 2026 fees and timeline.

This guide is for California drivers pursuing a CDL for trucking, bus, or specialized commercial work. If you served in a military commercial role, see also the veterans guide for the skills-test waiver (MC 506).

Class A, B, or C: which CDL do you need?

• Class A — Tractor-trailers and combination vehicles with a gross combined weight rating (GCWR) over 26,000 lbs, where the towed unit is over 10,000 lbs. Most over-the-road truck drivers need Class A.
• Class B — Single vehicles over 26,000 lbs (dump trucks, straight box trucks, buses). Class B includes Class C privileges.
• Class C commercial — Vehicles transporting 16+ passengers (including the driver) or hazardous materials placards. Limited use case — most C-commercial holders work for school districts or shuttle services.

Class A is the most flexible and the most common starting point if you plan to drive long-haul. If you only need to operate a single delivery truck, Class B is faster to obtain.

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Entry-Level Driver Training (ELDT)

Since February 7, 2022, federal regulations require Entry-Level Driver Training before a new CDL applicant can take the knowledge test. ELDT must be completed at a school listed on the FMCSA Training Provider Registry. The training includes:

• Theory training — classroom or online lessons on vehicle systems, hours of service, cargo securement, fatigue management, and trip planning
• Behind-the-wheel training — driving range and public road instruction (the number of required hours is set by the school, not the federal rule)
• Endorsement-specific theory — additional training if you plan to add Hazmat (H), Passenger (P), or School Bus (S)

The DOT physical (medical certification)

Before applying for a CDL you must pass a physical examination by a doctor on the FMCSA National Registry of Certified Medical Examiners. The exam covers:

• Vision — 20/40 in each eye, with or without correction; 70-degree peripheral field
• Hearing — must hear a forced whisper at five feet, in either ear
• Blood pressure and cardiovascular health
• Diabetes and blood sugar control (insulin-treated drivers need a separate exemption)
• Mental and neurological conditions
• Drug screen — DOT 5-panel

The doctor issues a Medical Examiner's Certificate (MEC, form MCSA-5876). Submit a copy to the California DMV — they keep it on file with your CDL record. The certificate is typically valid 24 months; some conditions require shorter intervals (3, 6, or 12 months).

CDL endorsements

Endorsements expand what you can operate or carry:

• H — Hazardous materials — requires a TSA background check and additional knowledge test. Renewed at every CDL renewal.
• N — Tank vehicles — operating tankers with liquid or gas cargo
• P — Passengers — required for buses and other multi-passenger commercial vehicles
• S — School bus — additional fingerprinting and background check
• T — Double/triple trailers — for combinations beyond single semi
• X — Combination of H and N (hazmat + tanker, common for fuel tankers)

Each endorsement requires its own knowledge test. Hazmat (H/X) is the most involved — the TSA background check alone takes 6–8 weeks.

The skills test

The CDL skills test has three parts:

1. Pre-trip inspection — verbalize a complete vehicle inspection in front of the examiner. About 100 items.
2. Basic control skills — straight backing, alley dock, parallel park, offset back
3. On-road driving — about an hour of city, highway, and freeway driving with the examiner observing

You bring your own commercial vehicle (or your training school provides one). The vehicle must match the class and endorsements you are testing for. Wear sturdy work boots — climbing in and out of the cab is part of the pre-trip.

If you fail any of the three parts, you can re-take just the failed portion. Most schools include retest support in their tuition.

Air brakes

If your CDL vehicle has air brakes, you must pass an air-brake knowledge test in addition to the general CDL test. Failing the air-brake test results in an "L" restriction (no air-brake operation) added to your license — most trucking jobs require an air-brake-clear CDL.

Documents to bring

• Completed DL-44C (commercial driver license application)
• Identity and California residency proof (same as standard licenses)
• Social Security number
• ELDT certificate from the FMCSA Training Provider Registry
• Medical Examiner's Certificate (MCSA-5876)
• Existing Class C California driver license (you cannot apply for CDL without one)
• Clean driving record check (the DMV pulls it automatically)
• If applying for endorsements: TSA receipt (Hazmat), fingerprints (School Bus)

Costs in 2026

• CDL application fee: $98
• Each endorsement: $45 (each separate test)
• ELDT training (Class A): $3,000–$7,000 commercial; some company-sponsored free with commitment
• DOT physical: $80–$150 cash; some insurance covers
• Hazmat TSA background check: $86
• School bus endorsement fingerprinting: $50–$80
• Replacement CDL: $42

Frequently asked questions

How long does it take to get a Class A CDL in California?

Most full-time students finish ELDT in 4–8 weeks. Add 2–4 weeks for the knowledge test, skills test scheduling, and DMV processing. Total: 6–12 weeks from start to receiving the license.

Can a 17-year-old get a CDL in California?

No. The minimum CDL age in California is 18 for intrastate driving (within California only) and 21 for interstate driving. New federal rules under the FMCSA Safe Driver Apprentice program allow some 18-20 year-olds to drive interstate under specific employer supervision.

Do military CDL waivers also cover the knowledge test?

No. Form MC 506 waives only the skills test for qualifying military drivers. You still take the CDL knowledge test, air brakes, and any endorsement knowledge tests at the DMV. See our veterans guide for details.

How often do I renew the DOT medical certificate?

Most certificates are valid 24 months. The DMV requires you to submit the updated MEC any time it changes, and you must file the new certificate before the old one expires to keep your CDL active.

What is the difference between an interstate and intrastate CDL in California?

Intrastate (within California only) lets you operate at age 18 and has slightly looser medical rules. Interstate (across state lines) requires age 21 and the federal DOT medical card. Most trucking jobs require interstate; choose interstate on form DL-44C unless you specifically only want California-internal work.

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