Abstract: Retirement planning for a person is performed. For each of each class of assets, the income, and the expenses of the person, an analysis is employed that produces a probabilistic distribution of possible future values therefor, and based on each produced distribution derives a respective best case future value, a worst case future value, and a median case future value. Each analysis is conducted by compiling a collection of historical values, performing multiple scenarios based on random inputs to calculate expected future values for each of several particular future periods of time, deriving a probabilistic distribution with distribution values relating to projected future value for each period of time, and deriving a best case future value, a worst case future value, and a median case future value from each probabilistic distribution.