It began on 23 May at Circuit de Monaco and ended on 12 September at the Autodromo Nazionale di Monza, after eight races, all of which were support events for the 2021 Formula One season.
The 2021 Porsche Mobil 1 Supercup provisional calendar was released on 28 November 2020.
[4] On 14 May 2021, due to the changes in the Formula One calendar, the Porsche Supercup calendar was also adjusted, with the round at Paul Ricard on 25–27 June being replaced by a second round at the Red Bull Ring.
[5] Later on 28 June 2021 it was announced that the round at Silverstone would be cancelled and an additional race would be held at Monza.
In the event of a tie at the conclusion of the championship, a count-back system is used as a tie-breaker, with a driver's/constructor's best result used to decide the standings.