A field experiment was conducted at the Main Agricultural Research Station, University of Agricultural Sicences, Dharwad on black clay soil to study the “Response of rajmash (Phaseolus vulgaris L.) to the levels of nitrogen, phosphorus and potassium during rabi in the Northern Transition Zone”  with three levels of nitrogen (40, 80 and 120  N kg ha-1) ,  three levels of phosphorus (25, 50 and 75  P2O5 kg ha-1), two levels of potassium (30 and 60 K2O kg  ha-1) with an absolute control (0:0:0 N:P:K kg ha-1). Significantly higher grain yield was recorded with 120:75:60 kg N:P2O5 :K2O ha-1 fertilization (1375 kg ha-1) which was on par with 80:75:60 N:P2O5 :K2O kg ha-1(1352 kg ha-1) and 80:75:30 N:P2O5 :K2O kg ha-1 (1337 kg ha-1). Significantly higher plant height, number of branches per plant, leaf area index, total dry matter production, number of pods per plant, seeds per pod, 100- seed weight and seed yield per plant was recorded with 80:75:30 N:P2O5 :K2O kg ha-1. Significantly higher net returns (` 21113 ha-1) and benefit cost ratio (2.72) was also obtained with application of 80:75:30 N:P2O5:K2O kg ha-1 .