This paper presents a macrolevel energy model and its application for energy planning for three States in India-namely Gujarat, Kerala and Rajasthan. In conjunction with energy modelling at national level, the Advisory Board on Energy, Government of India, envisaged regional energy planning to capture regional specificities in energy demand-supply structure. Methodology for constructing reference energy system, expanded input-output table with disaggregated energy sectors and a linear programming model for analysis are presented. Scenario analysis approach is adapted and analysis and findings are presented for future reference years upto 2000 AD.