Registered from fare one. Now choose how you remit.
A ride-share driver is registered effective the day of the first fare, and the CRA asks for the application before the thirtieth day after that day. How you remit afterwards is a real choice, and it is worth money. The Standard Method claims back the actual GST/HST you pay on fuel, repairs, cleaning and the car itself as input tax credits. The Quick Method remits a flat percentage of revenue instead, which is 3.6 percent for a driver whose base and rides are both in a 5 percent GST province, and 8.8 percent for an Ontario driver on Ontario rides, plus a 1 percent credit on the first $30,000 of eligible supplies each year.
The catch matters more for drivers than for most trades. Under the Quick Method the CRA allows input tax credits only on a narrow set of purchases, and vehicles are on that list while fuel, repairs and cleaning are not. A driver burning a tank a day may keep more on the Standard Method. NorthOS supports both and never elects one for you, because the election belongs to the filer.
New to this? Start with how to register for GST/HST, then read the CRA's Quick Method guide (RC4058).