<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
How old do you have to be to rent a car?
<|assistant|>
In most countries, the minimum age to rent a car is 21 years old. However, there may be some rental companies that rent cars to those between 18-21 years old for an additional fee. Additionally, some countries have restrictions regarding driving hours for those under the age of 25, so the renter's age may not matter if they are over the legal driving age in the country they are visiting.