
Based on accidents and safety studies performed by the industry, the minimum car rental age is 25. Studies have shown that drivers less than 25 years of age have higher accident rates and are more susceptible to being involved in serious car accidents. According to American Car Rental Association, drivers below 25 years of age should not rent vehicles.
Thrifty
Thrifty rents cars to those less than 25 years of age. There are limitations. A valid credit card and driver's license are required. You must be 18 or older to rent a vehicle. A per-day surcharge may also be added. This fee is typically about $27, but it varies based on the location you choose. Lastly, you may not be allowed to rent some specialty vehicles.

Avis
You can rent an Avis car if you are younger than 25. To rent a vehicle from Avis, all you need is a valid driver’s licence and a credit/debit card that bears the Avis logo. Your driver's license is proof of your identity as well as an acceptable driving record. The credit card is proof of payment. To be able to show a round-trip ticket, your itinerary and name along with departure and arrival dates, you need to also provide a valid airline ticket. If you are traveling to another state you will need a valid military ID or state-issued identification.
Budget
AAA membership is a great option for young drivers. You can save the $25 under 25 rental car fee. This fee is anywhere from $20 to $84 per day and can make renting more expensive.
Enterprise
There are many discounts available for drivers who are younger than 25. Young travelers can get discounts at major car rental companies, whether they are traveling for pleasure or business. You can save money by renting from AAAA-affiliated firms. These organizations offer discounts to their members, and the rental fees are usually significantly lower.
Hertz
AAA membership is a great way to save money on car rental costs if you're a young driver. Your membership includes roadside assistance, discounts and a wide range of other services including rental cars. You can rent a car through Hertz, which is part the AAA network.

USAA
Under 25s may find it more difficult to rent car. But, if you have Chase Sapphire Preferred Card you may be eligible for free collision damage waivers when renting a car. Those under 25 also have some other options, such as using car-sharing services and going off-airport. No matter whether you're renting a car in your home or traveling to another country, it's always a good idea to have a creditcard available for payments.