ChangeGPS Fringe Benefits Tax calculates motor vehicle (car) benefits using the ATO's statutory formula method. The taxable value is calculated as: Base Value × 20% × (Days Available ÷ 365). The base value is the GST-inclusive price of the vehicle (including any dealer-delivered extras) at the time it was first provided as a fringe benefit. Days available is the number of days during the FBT year (1 April to 31 March) that the vehicle was available for the employee's private use. Any contributions made by the employee toward the vehicle's running costs are subtracted from the taxable value. For example, a vehicle with a base value of $50,000 available for 365 days would have a taxable value of $10,000 ($50,000 × 20% × 365/365). ChangeGPS FBT performs this calculation automatically once you enter the vehicle details and days available.