The minimum age to rent a car varies by country and rental company, but generally:

• In many countries, the minimum age to rent a car is 21 years old , provided the driver has held a valid license for at least one year

• In the United States and Canada, the minimum age is typically 21 , but some states like Michigan and New York allow renting at 18 years old with additional young driver fees

• Some rental companies, like Hertz, rent to drivers as young as 20 years old in most locations, with exceptions for 18-year-olds in certain states

• Drivers under 25 often face a "young driver surcharge," an extra daily fee, and may have restrictions on the types of cars they can rent

• In Europe, the minimum age is often 21 , but can be as low as 18 in some countries or for certain vehicle categories, usually with young driver fees applied

• For drivers aged 25 and older, there are usually no additional fees or restrictions.

In summary, while 25 is the standard age for unrestricted car rentals, many companies rent to drivers aged 21-24 with extra fees, and some allow rentals from age 18 in specific locations or under special conditions such as government orders or state laws