1.1 Current Exam Facts

Who Needs the CDL Passenger (P) Endorsement

Quick answer: You need a Passenger (P) endorsement on a Class A, B, or C commercial driver's license (CDL) to operate a commercial motor vehicle (CMV) designed to transport 16 or more passengers including the driver. Federal rules set that design-capacity trigger and a knowledge-test passing standard of at least 80%. Question count, time limit, fees, language options, and retest rules are state-specific — confirm them in your current state CDL manual.

The P endorsement is not a job title and it is not limited to city buses. The Federal Motor Carrier Safety Administration (FMCSA) Drivers page and 49 CFR Part 383 look at how the vehicle is designed. If the CMV is designed to transport 16 or more people counting the driver, you need a CDL of the correct class plus P before you carry the public, charter groups, airport shuttles, or any other passengers that vehicle is built to haul. School-pupil routes in a school bus add the School Bus (S) endorsement — that split is Section 1.3, not a reason to skip P.

The 16-passenger federal definition

49 CFR 383.91 is the vehicle-group rule. Class A and Class B are driven by combination and single-unit weight. Class C is the leftover commercial group: a single vehicle, or a combination, that is not Class A or Class B but that is designed to transport 16 or more passengers including the driver, or that is used to transport hazardous materials requiring placards.

That Class C passenger clause uses the same 16-including-driver figure FMCSA uses for the P endorsement itself. A van designed for 15 occupants including the driver sits below the federal P trigger. A vehicle designed for 16 occupants including the driver sits inside it, even if today's trip has empty seats. Removing a few cushions for one charter does not rewrite the manufacturer's design capacity. Adding seating so that design capacity hits 16 including the driver can pull a shuttle into both P and, if it is not Class A or B, Class C.

A Class A holder may operate Class B and Class C vehicles if endorsements and restrictions allow it. A Class B holder may operate Class C. Neither Class B nor Class C authorizes a Class A combination. P is also class-specific on the skills-test side: the passenger vehicle you use for the skills test later controls M and N restrictions (previewed in Section 1.3; full treatment is Chapter 7).

Design capacity vs. today's headcount

Inspect the manufacturer's capacity plate and seating design, not the number of tickets sold. An empty 47-passenger coach is still a passenger CMV. A 12-passenger van that is not designed for 16 or more including the driver is outside this federal P trigger even if it is used commercially. Exam items love that distinction because “I only had nine riders today” is not a legal defense.

Knowledge tests: 80% is federal; logistics are not

49 CFR 383.135 says a driver applicant must correctly answer at least 80 percent of the questions on a knowledge test. That 80% floor is national. It is not an 85% federal pass-rate statistic, and it does not freeze a 20-question / 30-minute / $50–$100 nationwide form.

49 CFR 383.133 requires each state to develop and administer CDL knowledge tests using FMCSA-approved methods and the federal/AAMVA item pool. States therefore share a safety core. They do not share one clock, one fee, one language list, or one retest wait. A prep page that treats “the real P test is always 20 questions in 30 minutes” as a federal fact is describing one jurisdiction or repeating an old template.

One format detail is federal. 49 CFR 383.133(b)(2)(iii) speaks of “the three possible responses to the questions,” because the FMCSA/AAMVA item pool is built as three-option multiple choice. Expect three answer choices per item on the real Passenger knowledge test — not the four choices used by most practice software, including the practice checks in this guide. The same rule forces test churn: 25 percent of the questions on a version must be new since the previous version (383.133(b)(2)(ii)), and any repeated question must appear in a different location with its three responses in a different order.

That said, many states do use 20 Passenger items. Washington DOL publishes a knowledge-test table that lists Passenger as 20 questions, 16 to pass (16/20 is exactly 80%). Use that as an example of how a state publishes logistics — not as 49 CFR. Your state's current CDL manual and licensing-agency page control the form you will see, including whether the test is offered in languages other than English and how soon you may retest after a fail.

• Item count: Confirm the Passenger row in your state manual. Do not assume Washington's 20/16 table.
• Time limit: Set by the state licensing agency, not by a 49 CFR minute count.
• Fees and appointments: State, and sometimes county or third-party tester, charges.
• Language options: 49 CFR 383.133(b)(3) allows a knowledge test to be given in a foreign language provided no interpreter is used; whether your state actually offers a translated Passenger test is a state decision. (Interpreters are barred outright on the skills test — 383.133(c)(5).)
• Retest rules: Waiting periods after a fail are state rules, but 49 CFR 383.133(b)(4) requires the state to give you a different version of a test you previously failed.

What to study in 2026

Your controlling study source is the current state CDL manual, not a third-party outline:

1. Section 4 — Transporting Passengers Safely — the P-specific chapter: loading and unloading, emergency exits including push-out windows, fires and unruly passengers, railroad-highway grade crossings, drawbridges, and braking with a bus.
2. Section 2 — Driving Safely — space management, speed, seeing, communication, and night/winter driving that still apply to passenger work and still appear in knowledge items.
3. Section 5 — Air Brakes — required knowledge if the bus you will drive or test in has air brakes. Skipping it, or testing in a vehicle without air brakes, can produce an L restriction (no air-brake-equipped CMV).

After you have worked those chapters, use free Passenger practice at /practice/cdl-passenger. Practice inventory is not the official exam length and is not a substitute for your state manual. Use it to rehearse the 80% standard and the Section 4 topics until the rules are automatic.

Age 21 for interstate passenger, and P vs. T/N/H

Interstate CMV operation generally requires the driver to be at least 21 (49 CFR Part 391). Passenger carriers that cross state lines follow that rule. Some states allow drivers 18–20 to hold a CDL for intrastate work, often with a K (intrastate only) restriction. Do not assume an 18-year-old P holder can take a charter across a state line.

49 CFR 383.93 splits endorsements by test type. P requires both a knowledge test and a skills test in a passenger vehicle of that group. S follows the same knowledge-plus-skills pattern. Contrast that with T (doubles/triples), N (tank vehicle), and H (hazardous materials): those three are knowledge tests only at the federal endorsement level (H also requires a TSA Security Threat Assessment). If you study P as if a written quiz finishes the credential, you will miss the skills test, first-time Entry-Level Driver Training (ELDT), and the Commercial Learner's Permit passenger limits in Section 1.2.