Do I really have to keep a mileage log if I work on temporary construction sites ?
Yes. You must keep a mileage log, even if you work on temporary construction sites.
This log protects you because it shows that your trips to these sites are for business purposes and not part of your regular commute. In general, direct trips from your home to a temporary work site are considered business trips. Without a logbook, the CRA could reclassify your trips as personal, which would cause you to lose your deductions.
