Así marcha la carrera por el ascenso: dos equipos conseguirán boletos a primera, mientras que el de peor coeficiente de rendimiento, desciende. Mira la tabla 2021 aquí.
Tabla de Posiciones Campeonato Nacional Primera B 2021
| Pos | Club | Pts | G | PJ | E | P | GF | GC | DG |
|---|---|---|---|---|---|---|---|---|---|
| 1 |  Coquimbo Unido | 55 | 14 | 30 | 13 | 3 | 40 | 22 | 18 |
| 2 |  Deportes Copiapó | 52 | 14 | 30 | 10 | 6 | 47 | 36 | 11 |
| 3 |  Santiago Morning | 51 | 13 | 30 | 12 | 5 | 43 | 26 | 17 |
| 4 |  Deportes Temuco | 49 | 13 | 30 | 10 | 7 | 42 | 29 | 13 |
| 5 |  Deportes Puerto Montt | 48 | 12 | 30 | 12 | 6 | 34 | 30 | 4 |
| 6 |  Deportes Santa Cruz | 45 | 12 | 30 | 9 | 9 | 35 | 37 | -2 |
| 7 |  Magallanes | 41 | 9 | 30 | 14 | 7 | 37 | 35 | 2 |
| 8 |  Deportes Iquique | 40 | 11 | 30 | 7 | 12 | 52 | 45 | 7 |
| 9 |  Arturo Fernández Vial | 40 | 11 | 30 | 7 | 12 | 45 | 39 | 6 |
| 10 |  San Luis de Quillota | 40 | 9 | 30 | 13 | 8 | 33 | 32 | 1 |
| 11 |  Unión San Felipe | 36 | 10 | 30 | 6 | 14 | 34 | 40 | -6 |
| 12 |  Rangers | 35 | 9 | 30 | 8 | 13 | 34 | 42 | -8 |
| 13 |  Cobreloa | 33 | 8 | 30 | 9 | 13 | 35 | 38 | -3 |
| 14 |  Universidad de Concepción | 33 | 7 | 30 | 12 | 11 | 32 | 38 | -6 |
| 15 |  A.C. Barnechea | 24 | 5 | 30 | 9 | 16 | 28 | 44 | -16 |
| 16 |  San Marcos de Arica | 16 | 3 | 30 | 7 | 20 | 14 | 52 | -38 |
