Confira o calendário da NASCAR Cup 2021, com os horários do início das provas no Brasil. Classificação do campeonato
| Dia | Etapa | Vencedor | Horário (Brasília) | |
| 09/02 – Terça | Busch Clash (Daytona Road) | Kyle Busch | 21:00 | |
| 11/02 – Quinta | Duels at Daytona | Aric Almirola, Austin Dillon | 21:00 | |
| 1 | 14/02 – Domingo | Daytona 500 | Michael McDowell | 16:30 |
| 2 | 21/02 – Domingo | Daytona Road Course | Christopher Bell | 17:00 |
| 3 | 28/02 – Domingo | Homestead-Miami | William Byron | 17:30 |
| 4 | 07/03 – Domingo | Las Vegas 1 | Kyle Larson | 17:30 |
| 5 | 14/03 – Domingo | Phoenix 1 | Martin Truex Jr. | 16:30 |
| 6 | 21/03 – Domingo | Atlanta 1 | Ryan Blaney | 16:00 |
| 7 | 29/03 – Segunda | Bristol (Dirt) | Joey Logano | 17:00 |
| 8 | 10/04 – Sábado | Martinsville | Martin Truex Jr. | 20:30 |
| 9 | 18/04 – Domingo | Richmond | Alex Bowman | 16:00 |
| 10 | 25/04 – Domingo | Talladega | Brad Keselowski | 15:00 |
| 11 | 02/05 – Domingo | Kansas | Kyle Busch | 16:00 |
| 12 | 09/05 – Domingo | Darlington (Throwback) | Martin Truex Jr. | 16:30 |
| 13 | 16/05 – Domingo | Dover | Alex Bowman | 15:00 |
| 14 | 23/05 – Domingo | Circuito das Américas | Chase Elliott | 15:30 |
| 15 | 30/05 – Domingo | Charlotte 600 | Kyle Larson | 19:00 |
| 16 | 06/06 – Domingo | Sonoma | Kyle Larson | 17:00 |
| 13/06 – Domingo | All-Star Open / All Star (Texas) | Kyle Larson | 19:00 / 21:00 | |
| 17 | 20/06 – Domingo | Nashville | Kyle Larson | 16:30 |
| 18 | 26/06 – Sábado | Pocono 1 | Alex Bowman | 16:00 |
| 19 | 27/06 – Domingo | Pocono 2 | Kyle Busch | 16:30 |
| 20 | 04/07 – Domingo | Road America | Chase Elliott | 15:30 |
| 21 | 11/07 – Domingo | Atlanta | Kurt Busch | 16:30 |
| 22 | 18/07 – Domingo | New Hampshire | Aric Almirola | 16:00 |
| 23 | 08/08 – Domingo | Watkins Glen | Kyle Larson | 16:00 |
| 24 | 15/08 – Domingo | Indianapolis Road Course | AJ Allmendinger | 14:00 |
| 25 | 22/08 – Domingo | Michigan | Ryan Blaney | 16:00 |
| 26 | 28/08 – Sábado | Daytona 400 | Ryan Blaney | 20:00 |
| 27 | 05/09 – Domingo | Darlington | Denny Hamlin | 19:00 |
| 28 | 11/09 – Sábado | Richmond | Martin Truex Jr. | 20:30 |
| 29 | 18/09 – Sábado | Bristol | Kyle Larson | 20:30 |
| 30 | 26/09 – Domingo | Las Vegas | Denny Hamlin | 20:00 |
| 31 | 03/10 – Domingo | Talladega | Bubba Wallace | 15:00 |
| 32 | 10/10 – Domingo | Charlotte ROVAL | Kyle Larson | 15:00 |
| 33 | 17/10 – Domingo | Texas | Kyle Larson | 15:00 |
| 34 | 24/10 – Domingo | Kansas | Kyle Larson | 16:00 |
| 35 | 31/10 – Domingo | Martinsville | Alex Bowman | 15:00 |
| 36 | 07/11 – Domingo | Phoenix | Kyle Larson | 17:00 |