The provisional 2021 season calendar was announced on 30 November 2020, with 13 rounds scheduled, and was later revised in response to the
COVID-19 pandemic. On 16 February 2021 the Assen round, scheduled for 23–25 April, was postponed to 23–25 July. On 9 March 2021 the Estoril round, scheduled for 7–9 May, was postponed to an unannounced date and the Navarra round—a new event for the championship—was added into the calendar. On 16 April 2021 the Estoril round was confirmed to be held on 28–30 May. On 29 April 2021 the Phillip Island round was cancelled and a round at Most—another new venue—was added into the calendar. On 25 September 2021, it was announced that the Mandalika round was pushed back a week. ==Entry list==