Defined benefit plans like that largely are what they are. Pensions are based almost entirely on how long you worked for the place offering the pension. Socia

Defined benefit plans like that largely are what they are. Pensions are based almost entirely on how long you worked for the place offering the pension. Social Security is a bit more complicated, but is still based on how long you worked and how much you made. This calculator is about modelling the effects of your savings rate, inflation, and return rate on the portion of your retirement income that is based on your savings. The defined benefit payments are constants for the purposes of this model.