Field experiments were conducted at twelve centers of All India Coordinated Research Project on Potato representing different agro climatic zone to find out suitable dose of P in potato based on soil test during 2005-06 and 2006-07. Four treatments consisting of combinations of different levels of P based on soil test used in the study showed significant effect on yield of potato. Results revealed that soil having low P availability (≤ 10 ppm) responded to P fertilizers and there was a need of P application at all these centers 100-125% recommended dose of P gave best tuber yield and also net returns. In case of medium P availability soils (10 to 22 ppm), the 50-100% recommended dose of P fertilizer was found to meet P need of the crop and gave higher yield and also net returns. In case of high P status soils (≥ 20ppm), application of P did not respond by increased yield and 25% of recommended dose of P as maintenance dose in the soils with > 20 ppm P gave maximum tuber yield. The results clearly indicate that P may be applied based on soil test value across different agro climatic zone to economize P dose.