In the U.S. and Canada, you have to be at least 18 years of age to get a Commercial Drivers License (CDL).
However, if you are under 21 years of age, you can only drive intrastate, which means inside of your state of residence. You cannot cross state lines into another state or into another country such as Canada or Mexico.
A U.S. federal law, administered by the US DOT, prohibits any driver under the age of 21 from hauling cargo across state lines, even I fthey have been fully trained on overating the vehicle and understand all the safety requirements and have ben trained on safety equipment on a truck.
The other challenge is getting vehicle insurance as a truck driver. Most insurers will charge you more for a driver’s policy if you are under 25.
What age do you need to be to drive a box truck?
Box trucks are generally built to carry a maximum load (Gross Vehicle Weight Rating/GVWR) of less than 26,000 lbs. That means you do not need to hold a commercial driver’s license, so as long as you are legally license to drive a car, you can drive a rented truck including one as large as a box truck.