Some car rental companies, such as Avis, don’t require a security deposit once you have a charge card (credit card, not debit!), but most companies do. Generally, the deposit will be lower depending on age of  the driver and type of vehicle. A car hire deposit can vary hugely depending on the type of car you’re renting, the country you’re renting it in and the company you’re using. Oh, and to ensure you get back you deposit, always read the terms and conditions before hitting the road!