The deposit is reserved when you got the car by the client's credit card. The reserved deposit will be available for use again within 2 to 4 weeks after the car is returned. The deposit is usually equal to the amount of the insurance deductible and the cost of a full fuel tank, but depending on the age of the driver, location of rental, the car class and the rental period may vary. You can find out the amount of the deposit for most cars in the "rental Conditions" section, where the deposit amount is usually clearly stated.