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Class B CDL (2026): What It Covers & Tests

A Class B CDL is the license for driving a single heavy vehicle — a big straight truck or a bus, not a tractor-trailer. It's often the faster, cheaper way into commercial driving, and you can always upgrade to Class A later. Here's what it covers and how the tests work.

Quick answer

What it is
The CDL for a single heavy vehicle — one big truck or bus, not a combination rig
Weight rule
Single vehicle GVWR ≥ 26,001 lb (may tow a unit ≤ 10,000 lb) (49 CFR 383.91)
Typical jobs
Straight (box) trucks, dump trucks, delivery, city/transit buses, garbage trucks
Tests
General knowledge + air brakes, then a skills test in a Class B vehicle
Upgrade path
You can later upgrade B → A (this requires ELDT upgrade training)

Source review dated July 20, 2026 against FMCSA (49 CFR 383.91)

What a Class B CDL covers

Under federal rule 49 CFR 383.91, Class B is the group for a single vehicle with a Gross Vehicle Weight Rating (GVWR) of 26,001 lb or more. That single vehicle can also tow a unit — but only one rated 10,000 lb or less. The moment you pull a trailer heavier than that (with the combined rating at or above 26,001 lb), you're into Class A territory.

Class B steps down to Class C vehicles (with the right endorsements), but it does not step down to Class A. (The CFR calls these "groups"; states brand them as "classes" — same thing.)

Example jobs and vehicles

Typical vehicles a Class B driver operates:

  • Straight (box) trucks and large delivery trucks
  • Dump trucks and garbage/refuse trucks
  • City transit and motorcoach buses (with the passenger endorsement)
  • School buses (with passenger + school bus endorsements)
  • Cement mixers and utility/service trucks

Common job types:

  • Local delivery and route driving — often home daily
  • Construction hauling (dump, mixer)
  • Transit and school bus driving (with endorsements)
  • Municipal work like sanitation

The tests you take

  • General knowledge — the core test every CDL applicant takes.
  • Air brakes — most Class B trucks and buses have air brakes; skip it and you get an air-brake restriction.
  • Skills test — pre-trip inspection, basic control, and an on-road drive in a representative Class B vehicle.

Study with our freegeneral knowledge andair brakes practice tests. Endorsements like passenger (P) orschool bus (S) add their own tests.

How to upgrade Class B → Class A later

Starting with a Class B and moving up is a common path. Because a B-to-A move adds a new class, federal rules require you to complete anELDT upgrade — the theory and behind-the-wheel training built specifically for the Class B to Class A upgrade — through a provider on the FMCSA Training Provider Registry. After that you pass the combination vehicles knowledge test and a Class A skills test.

Honest heads-up: if you already expect to want over-the-road tractor-trailer work, going straight to Class A can save you the time and cost of upgrading twice. Weigh it on ourClass A vs Class B CDL page.

How to get started

First-time applicants complete ELDT before testing. Walk through the steps on how to get a CDL, budget with the CDL cost breakdown, and see the full picture at the CDL classes hub.

Class B CDL FAQ

What can you drive with a Class B CDL?

A Class B CDL covers a single vehicle rated 26,001 lb or more — such as a straight truck, dump truck, or large bus — and that vehicle may tow a trailer rated 10,000 lb or less. Class B also steps down to Class C vehicles with the right endorsements. It does not let you pull a heavy trailer; that requires Class A.

What tests do I take for a Class B CDL?

You take the general knowledge test plus, in almost all cases, the air brakes test. Then you pass a skills test — pre-trip inspection, basic control, and a road drive — in a representative Class B vehicle. Endorsements you want, like passenger or school bus, add their own knowledge and skills tests.

Can I upgrade from a Class B to a Class A CDL later?

Yes. You can start with a Class B and upgrade to a Class A when you're ready. Because it's an upgrade to a new class, federal rules require you to complete Entry-Level Driver Training (ELDT) for the B-to-A upgrade — theory and behind-the-wheel — through a registered provider, then pass the combination knowledge test and the Class A skills test.

Is a Class B CDL cheaper and faster than Class A?

Usually. Class B training is often shorter and less expensive because it doesn't include combination-vehicle (trailer) work. The trade-off is fewer job types. If you think you'll want over-the-road trucking, many drivers go straight to Class A instead of upgrading later.

Do I need ELDT for a first-time Class B CDL?

Yes. A first-time Class B CDL requires ELDT — theory plus behind-the-wheel — from a provider on the FMCSA Training Provider Registry before you can take the skills test.

Official sources

Check the applicable rule and current instructions at these official sources. Research limitations are identified where they affect a claim.