The study presents the methodology of multi-model forecasting of expenses in terms of economic security. The research began with an analysis of the literature on: planning, forecasting, expenses, economic security and the COVID-19 pandemic. The article analyzes the time series of expenses incurred by the research subject in terms of detecting the regularities governing the phenomenon in question. The result of the research was the detection of the trend and seasonality on a monthly basis. The analysis of the literature and own experience allowed for the selection of three models to forecast the considered expenditure for the future. The constructed models were analyzed and assessed through the use of the MAPE measure in terms of selecting the most favorable model for forecasting raw data. The article ends with a summary and conclusions.