This project aimed to evaluate the carcass traits of Nellore cull cows finished in different times of high intake supplementation in Brachiaria brizantha ‘Marandu’ pasture, in dry season. It is assumed that the high intake supplementation in pasture could improve the carcass traits of these animals. The experiment was performed from 09/2014 to 11/2014, assessing 4 times of finishing with high intake supplementation – 2% of BW – in pasture (0, 21, 42 and 63 d). Several 60 Nellore cull cows were used and kept, before the beginning of the study, in system extensive production, pasture plus mineral salt ad libitum. The cull cows were distributed randomly (experimental design in randomized blocks) on 20 experimental units (paddock), composed by 3 animals/paddock and 5 paddocks/supplementation time. At zero time, the cows were conducted directly to slaughter and, at the end of feeding times 21, 42 and 63 d, the remaining cull cows were slaughtered for evaluation of carcass traits. The supplementation time did not alter the carcass length (136.43 cm; P = 0.90), carcass depth (45.59 cm; P = 0.53) and size of round (87.03 cm; P = 0.79) from cull cows. It was a linear increase (P < 0.01) on weight and carcass yield, longissimus muscle area (LM area) and subcutaneous fat thickness (12th-rib fat). Cull cows finished with 63 d of supplementation at pasture presented increased weight from 203.7 kg to 257.8 kg and the LM area became from 56.9 cm² to 70.8 cm², regarding the slaughtered cull cows at d 0. At the same period, it was registered an increase of 3.59 percentage points in carcass yield, initially of 51.5%; as well in 12th-rib fat, passing from 2.02 mm to 6.15 mm. Therefore, the increase in supplementation time applied in finishing of Nellore cull cows allows an improvement the carcass traits.