2020 Supercars Championship

Scott McLaughlin successfully defended his drivers' championship with one event remaining, winning the title for the third consecutive year.

[52][f] Team principal Garry Rogers cited escalating costs of competing and a model that required them to purchase parts rather than develop them as the reasons for his decision to withdraw.

[53] Rogers' team later returned to the championship with a single wildcard for the Bathurst 1000 – signing Super2 Series drivers Tyler Everingham and Jayden Ojeda.

[46] Nathan Herne from the Australian TA2 Racing Series was originally signed in Ojeda's place however his entry was blocked as Motorsport Australia denied him of the required licence.

[55][56] Courtney moved to Team Sydney by Tekno, with his seat at Walkinshaw Andretti United filled by Chaz Mostert.

[60] Zane Goddard and Jake Kostecki graduated from the Super2 Series and make their championship débuts driving for Matt Stone Racing.

[32] Goddard and Kostecki will share a car as part of the new SuperLite program, allowing both drivers to compete in five rounds of the series each before teaming up for the Enduro Cup.

[64][65][66] De Silvestro returned to Europe to compete in the ADAC GT Masters with Porsche, while Jacobson joined Matt Stone Racing.

He became a co-driver at the Bathurst 1000 for Tickford Racing after Alexandre Prémat, who resided in Las Vegas, was forced out by COVID-19 travel restrictions.

[6] Tickford Racing then leased the REC and entered the car as a fourth entry with James Courtney from round three onwards.

The Sydney SuperNight was originally scheduled to return to the calendar after a one-year absence, but was instead be the first event back after the enforced break due to the COVID-19 pandemic, and ran in daylight hours.

The change was made in response to Auckland Council passing legislation that prohibited from running any event at the circuit on key dates, with Anzac Day falling on the Saturday of the round.

[70][77] Supercars' management later announced that should an event be postponed, the calendar would have been altered to complete the 2020 fixture,[78] and that a January 2021 finish may have been required to do so.

The championship recommenced in June with a reformatted round at Sydney Motorsport Park, with the postponed races assigned new dates later in the season.

[82] Due to a spike in COVID-19 cases in Victoria, Sydney Motorsport Park hosted round four of the championship on the weekend of July 18–19 instead of Winton.

This spike also caused the Sandown event to be removed from the calendar and replaced with two rounds at The Bend Motorsport Park on the weekends of September 19–20 and 26–27.