The monthly value of the car benefit consists of two parts: the
     base value (percentage of the car's purchase price) and operating costs
     (monthly or kilometer-based euro amount). The base value corresponds
     mainly to the capital costs of the car. The base value includes
     depreciation, interest, insurance premiums, and vehicle tax. Operating
     costs, on the other hand, include tire, repair, and maintenance costs, as
     well as fuel costs for free car benefits.