Claiming Motor Vehicle Expenses
The best evidence to support the use of a vehicle is an accurate logbook of business travel maintained for the entire year, showing for each business trip, the destination, the reason for the trip and the distance covered.
You can deduct motor vehicle expenses only when they are reasonable and you have receipts to support them.
To get the full benefit of your claim for each vehicle, keep a record of the total kilometres you drive and the kilometres you drive to earn business income.
For each business trip, keep a log listing the following:
date
destination
purpose
number of kilometres you drive
Record the odometer reading of each vehicle at the start and end of the fiscal period.
If you change vehicles during the fiscal period, record the dates of the changes and the odometer reading when you buy, sell, or trade the vehicle.