In most states, taxi and limousine drivers need both a regular automobile driver's license and a chauffeur or taxi driver's license. Limousine drivers who transport 16 or more passengers are required to get a commercial driver's license (CDL) with a passenger (P) endorsement. Other requirements vary by state.

In some cities, drivers who work for taxi or limo companies can get temporary permits before they take the test. Many cities test applicants for their ability to speak and understand English. Those who do not pass the English exam must take a course. Many cities also require that applicants pass a physical exam and have their fingerprints checked for a criminal record.