The present investigation was carried out to study costs and returns of major farming systems in Jaipur District of Rajasthan. A multistage purposive and random sampling procedure was used to select district, tehsils, villages and farmers from the district. A sample of 60 households i.e. 30 each from irrigated and rainfed area. Information regarding cost items like labour, irrigation, depreciation was collected through primary data collection. Results revealed that the total costs per households under rainfed situation was the highest under FS-IV and it were lowest under FS-II. While, in case of irrigated situation, it was highest in FS-II and lowest in FS-III. Under rainfed situation, FS-IV was the most profitable farming system on net return basis (` 158942.26) and return per rupee investment i.e. ` 1.61. While, on the basis of net return per household, the most profitable farming system adopted under the irrigated situation was FS-II (` 489534.25) and on the basis of returns per rupee investment most profitable farming systems were same as FS-I and FS-II i.e. ` 1.89.