Abstract: Field experiments were conducted at the Field Station of the Water Resources Research Institute (WRRI), National Agricultural Research Centre (NARC), Islamabad and farmers fields at Hitter, Tehsil Fatehjang, district Attack of the Punjab province to study the benefits of supplemental irrigation on wheat crop under rainfed farming systems. Three irrigation strategies, namely 10 mm application at pre-sowing (Rauni), 10 mm application at 50 percent management allowed deficit (MAD) and 25 mm application at 75 percent MAD were employed. The supplemental irrigations were applied using locally developed raingun sprinkler irrigation systems. The yields of wheat grain and straw were increased with the application of supplemental irrigation at all the three selected strategies. Highest water use efficiency of 20.55 and 24.07 kg/mm of water was obtained at NARC, Islamabad and Fatehjang locations during the driest years of 1993-94 and 1992-93, respectively. The highest net benefits of around Rs. 9000 were obtained with irrigation strategy of 25 mm application at 75 percent MAD at both the locations. However, the economic irrigation strategy was a pre-sowing irrigation of 10 mm only, where highest benefit-cost ratio was observed. Therefore, scheduling programme must be designed in a way to apply deficit irrigations to plant crop at optimal planting time and to avoid effects of dry spells on reduction in yield or crop failures. The depth of irrigation application must be in accordance with the stage of growth. Furthermore, economic priority must be linked with the irrigation priority for developing management strategies.