Class A lets you drive combination vehicles — tractor-trailers — and is the most versatile, highest-earning CDL. Class B covers single heavy vehicles like box trucks, dump trucks, and buses, trains faster, and keeps you local. Both start with the same $20 step: FMCSA-required ELDT theory. Here's how to choose before you spend a dollar on training.
What each license covers
- Class A: combination vehicles with a gross combination weight rating of 26,001+ lbs where the towed unit exceeds 10,000 lbs — semis, tankers, flatbeds, car haulers. A Class A with the right endorsements can also operate most Class B vehicles, which is why it's called the most versatile CDL.
- Class B: a single vehicle rated 26,001+ lbs, or one towing a trailer under 10,000 lbs — box trucks, dump trucks, delivery and garbage trucks, and, with the P/S endorsements, buses.
The jobs behind each class
Class A careers skew toward freight: over-the-road, regional, LTL linehaul, tanker, flatbed, intermodal. The U.S. Bureau of Labor Statistics puts median pay for heavy and tractor-trailer truck drivers above $54,000 a year, and specialized lanes (hazmat tanker, oversize) pay well beyond the median. The trade-off is time away from home on many OTR jobs — though regional and dedicated routes narrow that gap.
Class B careers skew local: delivery, construction materials, waste collection, utilities, transit. Pay ceilings are generally lower than Class A freight, but you're home nightly, schedules are predictable, and many municipal and union roles carry strong benefits. Add the Passenger and School Bus endorsements and school districts in nearly every town become your job market.
Training and cost differences
Both classes require ELDT: theory plus behind-the-wheel from registered providers. The theory courses cost the same $20 at ELDT HQ — Class A follows Appendix A of 49 CFR Part 380, Class B follows Appendix B, and both take about a day online. The real difference is behind-the-wheel: combination vehicles demand more range time (coupling, backing a 53-foot trailer), so Class A BTW programs typically run longer and cost more than Class B.
Can I upgrade from B to A later?
Yes — and this matters for the decision. If you start with Class B and later want Class A, the FMCSA defines a shorter B-to-A upgrade theory curriculum that skips what your Class B training already covered (ELDT HQ offers it, also $20). You'll still need Class A behind-the-wheel training and the skills test. So choosing B first doesn't lock you out of A; it just splits the journey into two stages.
How to decide
- Want maximum earning power and options? Go Class A. One license opens freight, and most Class B-style work besides.
- Need to be home every night from day one? Class B gets you working locally, faster and cheaper.
- Aiming at buses or school routes? Class B plus the Passenger and School Bus endorsements is the standard path — $60 of theory total at ELDT HQ.
- Still torn? Class A. The versatility means you never have to wonder — and the upgrade path exists either way.
Whichever class you choose, the first move is identical: complete your ELDT theory. Compare both courses on the courses page, or see the whole licensing path in How to Get a CDL.