The 2012–13 Czech 1.liga season was the 20th season of the Czech 1.liga, the second level of ice hockey in the Czech Republic. 14 teams participated in the league, and BK Mladá Boleslav and HC Olomouc qualified for the qualification round of the Czech Extraliga.
| Pl. | GP | W | OTW | OTL | L | Goals | Pts | |
| 1. | BK Mladá Boleslav | 52 | 33 | 7 | 4 | 8 | 191:104 | 117 |
| 2. | HC Olomouc | 52 | 34 | 2 | 7 | 9 | 190:109 | 113 |
| 3. | HC Slovan Ústečtí Lvi | 52 | 31 | 8 | 2 | 11 | 192:125 | 111 |
| 4. | SK Horácká Slavia Třebíč | 52 | 25 | 6 | 8 | 13 | 151:119 | 95 |
| 5. | SK Kadaň | 52 | 25 | 5 | 4 | 18 | 156:124 | 89 |
| 6. | HC Dukla Jihlava | 52 | 23 | 5 | 3 | 21 | 163:124 | 82 |
| 7. | HC VCES Hradec Králové | 52 | 21 | 3 | 8 | 20 | 161:163 | 77 |
| 8. | HC Rebel Havlíčkův Brod | 52 | 20 | 6 | 4 | 22 | 153:164 | 76 |
| 9. | HC Benátky nad Jizerou | 52 | 19 | 4 | 9 | 20 | 144:149 | 74 |
| 10. | HC Stadion Litoměřice | 52 | 19 | 3 | 7 | 23 | 139:151 | 70 |
| 11. | Salith Šumperk | 52 | 13 | 10 | 2 | 27 | 139:172 | 61 |
| 12. | HC Most | 52 | 9 | 7 | 3 | 33 | 130:212 | 44 |
| 13. | HC Berounští Medvědi | 52 | 10 | 4 | 6 | 32 | 118:208 | 44 |
| 14. | IHC Písek | 52 | 9 | 3 | 6 | 34 | 106:209 | 39 |
| Quarter-finals | Semi-finals | Final | ||||||||
| BK Mladá Boleslav | 4 | |||||||||
| HC Rebel Havlíčkův Brod | 0 | |||||||||
| BK Mladá Boleslav | 4 | |||||||||
| SK Horácká Slavia Třebíč | 2 | |||||||||
| SK Horácká Slavia Třebíč | 4 | |||||||||
| SK Kadaň | 0 | |||||||||
| Not played | ||||||||||
| HC Olomouc | 4 | |||||||||
| HC VCES Hradec Králové | 2 | |||||||||
| HC Olomouc | 4 | |||||||||
| HC Slovan Ústečtí Lvi | 0 | |||||||||
| HC Slovan Ústečtí Lvi | 4 | |||||||||
| HC Dukla Jihlava | 0 | |||||||||
BK Mladá Boleslav and HC Olomouc proceeded directly to the qualification round of the Czech Extraliga after winning their semifinal series. Both teams failed to qualify, however.
| Pl. | GP | W | OTW | OTL | L | Goals | Pts | |
| 1. | HC Benátky nad Jizerou | 62 | 23 | 5 | 9 | 25 | 175:178 | 88 |
| 2. | HC Stadion Litoměřice | 62 | 24 | 3 | 7 | 28 | 170:178 | 85 |
| 3. | Salith Šumperk | 62 | 18 | 11 | 3 | 30 | 180:207 | 79 |
| 4. | HC Most | 62 | 15 | 7 | 4 | 36 | 161:239 | 63 |
| 5. | IHC KOMTERM Písek | 62 | 14 | 3 | 7 | 38 | 137:243 | 55 |
| 6. | HC Berounští Medvědi | 62 | 12 | 5 | 6 | 39 | 146:249 | 52 |