The final cost of your car rental depends on numerous factors. First and foremost, each car type has a different price list. Mini cars are cheaper, whereas compact vehicles, SUVs, convertibles, etc. have higher prices. Moreover, the renting period and its duration also affect the fares. In general terms, the longer the renting time is, the lower the prices are. Generally speaking, a mini car in Madrid costs approximately 15€/15$/day and a compact 21€/21$ for a day’s use.