Forecasts for electrical energy requirements are not always required as a future electrical system development planning process but are also needed in the system of operation of power systems and the utilization of energy that is not optimal from the readiness of electrical energy system in the provision of energy as needed. Along with the population growth and economic growth hence the need for electrical energy also increased. This study designs forecasts for electric energy needs in 2018 - 2022 at PT. PLN (Persero) Rayon Pagar Alam with Time Series method. This method is based on the hubugan data of the past without regard to the factors causing (economic causes, climate, technology, etc.) with the trend trend curve model where the calculation technique used exponential trend movement up or down trend in the long term obtained from average time to time changes with a fairly smooth value. Increased population growth and economy showed an increase in the number of customers by 4.34% per year, electricity consumption in 2022 of 100,908.26 MWh with an average growth of 7.04%, electrical energy needs of 110.999.09 MWh and peak load which amounted to 14.399 MW.