
In the United States, the primary driver of a rental car must typically be at least 21 years old, possess a valid driver's license that has been held for a minimum of one year, and present a major card in their name. However, the specific rules can vary significantly by rental company, state, and even the specific rental location. The most critical step is always to check directly with the rental company you plan to use before booking.
Age is a major factor. While the minimum age is often 21, renters under 25 will almost always face a "Young Renter Fee," which is a daily surcharge. Some companies may even restrict vehicle classes for younger drivers, prohibiting them from renting luxury cars, SUVs, or sports cars. A few rental locations, particularly near universities or in certain states, may allow 18-year-olds to rent, but this is rare and comes with strict conditions and higher fees.
License validity is non-negotiable. For U.S. residents, a valid, non-expired driver's license from their state of residence is required. For international visitors, a valid driver's license from their home country is usually sufficient if it is in English or accompanied by an official International Driving Permit (IDP). The license must be for operating a standard passenger vehicle.
Additional drivers must be declared. If someone else plans to drive the rental car, they must be added to the rental agreement at the counter, which often incurs an extra daily fee per additional driver. Spouses or domestic partners are sometimes exempt from this fee, but this policy varies by company. All additional drivers must also meet the same age and license requirements and present their licenses at the time of rental. Allowing an unauthorized person to drive invalidates the rental company's insurance and can leave you fully liable for any damage.
The table below outlines the general policies of major rental companies, but always confirm details directly.
| Rental Company | Standard Minimum Age | Young Renter Fee (Under 25) | Additional Driver Fee (Per Day) | Spouse/Partner Fee Waiver? |
|---|---|---|---|---|
| Enterprise | 21 | Varies by state/location | ~$15.00 | Often |
| Hertz | 21 | Varies by state/location | ~$15.00 | Often |
| Avis | 21 | Varies by state/location | ~$15.00 | Sometimes |
| Budget | 21 | Varies by state/location | ~$15.00 | Sometimes |
| Alamo | 21 | Varies by state/location | Varies | Varies |
| National | 21 | Varies by state/location | Varies | Varies |
| Thrifty | 21-25 (Varies) | Varies by state/location | ~$15.00 | Sometimes |
| Dollar | 20-25 (Varies) | Varies by state/location | ~$15.00 | Sometimes |

Basically, if you're the one booking the car, you need to be at least 21 with a valid license. But here's the catch: if you're under 25, they'll hit you with a daily "young driver" fee that can really add up. Anyone else who wants to drive, like your buddy on a road trip, has to be added at the counter. It costs extra per day, but it's way cheaper than getting caught with an unauthorized driver if there's an accident. Your spouse might drive for free, but you have to ask.

We learned this the hard way on a family vacation. My son, who's 23, was the main renter. The base rate was fine, but the young driver fee was almost $30 a day! We also needed my husband to drive, so that was another daily charge. The key is transparency. List every driver when you pick up the car. Don't just hand the keys to your friend halfway through the trip. If the rental company finds out an unlisted driver was behind the wheel, any or damage waiver you bought is void.

I travel to the U.S. for work a few times a year. The rules are straightforward for business. You need your home country driver's license, and it's a good idea to have an International Driving Permit, especially if your license isn't in English. The rental agreement is strict—only the people listed on it can drive. My company always adds me as an additional driver, but it's a formal process. Don't assume your colleague can just take a turn driving; that violates the contract and puts you at massive financial risk.

a big group trip? Figure out your drivers before you book. The person with the best credit card rewards and a clean driving record should be the primary renter. They must be over 21. Then, at the rental counter, officially add one or two other drivers. Yes, it costs more, but it's essential for sharing the driving load legally. Check each company's policy; some waive the fee for a spouse, which can save money. Never let an unauthorized person drive, not even for a short stretch. It's not worth the risk.


