Hy dro car bon gen er a tion mod el ling in the Perm ian and Tri as sic strata of the Pol ish Ba sin: im pli ca tions for hydro car bon po ten tial as sess ment. Geo log i cal Quar terly, 67: 20, doi: 10.7306/gq.1690 Hy dro car bon gen er a tion in the Zechstein Main Do lo mite and Up per Tri as sic po ten tial source rocks of the Pol ish Ba sin was in ves ti gated by 1-D ther mal ma tu rity mod el ling in 90 bore holes across the ba sin. This iden ti fied ma jor zones po ten tially worthy of fur ther ex plo ra tion ef forts. The max i mum burial depth of the Zechstein Main Do lo mite and Up per Tri as sic reached >5 km dur ing the Late Cre ta ceous lead ing to max i mum ther mal ma tu rity of or ganic mat ter. Hy dro car bon gen er a tion de vel opment re veals con sid er able dif fer ences be tween par tic u lar zones of the Zechstein Main Do lo mite and Up per Tri as sic. The kerogen trans for ma tion ra tio (TR) in the Zechstein Main Do lo mite reached val ues ap proach ing 100% along the ba sin axis. The TR in the Up per Tri as sic source rocks is gen er ally lower than in the Zechstein Main Do lo mite due to lesser burial. The Up per Tri as sic source rocks have the high est TR val ues (>50%) along the ba sin axis, in the area be tween bore holes Pi³a IG 1 and Piotrków Trybunalski IG 1, with the most pro nounced zone in the Krooeniewice Trough (i.e., be tween the Krooeniewice IG 1 and Budziszewice IG 1 bore holes), where the TR reached >90%. The Zechstein Main Do lo mite and Up per Tri as sic en tered the oil win dow in the Late Tri as sic to Early-Mid dle Ju ras sic, re spec tively. Hydrocarbon gen er a tion con tin ued un til the Late Cre ta ceous, and was com pleted dur ing tec tonic in ver sion of the ba sin. Key words: hy dro car bon po ten tial, kerogen trans for ma tion ra tio, ther mal ma tu rity mod el ling, Pol ish Ba sin, Perm ian, Tri as sic.