When do I have to keep a vehicle logbook?

Sole-traders and partnerships may have to run logbooks if the vehicle they use for business is also used for private running. A logbook is required to be kept for 3 months every 3 years. You start with the kilometres at the start of the 3 month period then record the number km travelled that day and the reason for the trip. At the end of 3 months the total private km divided by the total km travelled during that time will give you the private use percentage eg.

If your situation changes within the 3 year period after that then you will need to do another log book. Companies do not have to do a log book, they are liable for FBT instead. Shareholders are deemed to be employees of the company and are therefore subject to FBT for cars available for private running.