In order to calculate fleet TCO for a single vehicle, you must estimate acquisition cost, depreciation, interest, maintenance, fuel, insurance, taxes and fees, and repairs. Acquisition cost includes the initial cost of buying or leasing the vehicle, along with any down payment, fees, taxes, and incentives. Depreciation can be estimated with the straight-line or double-declining balance method. Interest is calculated based on the APR of your loan or lease contract or the average interest rate in your industry. Maintenance cost is determined by the manufacturer's recommended maintenance schedule or the average maintenance cost per mile in your industry. Fuel cost is based on the vehicle's fuel efficiency and the average fuel price in your area. Insurance cost is based on the vehicle's type, age, value and coverage. Taxes and fees are calculated by using your current tax and fee rates or the average tax and fee cost per vehicle in your industry. Repairs are estimated using the manufacturer's warranty terms or the average repair cost per mile in your industry. After estimating all components, you can add them up to get fleet TCO for a single vehicle; it can also be divided by miles or years to get fleet TCO per mile or per year.