The purpose of this paper is to outline a general method for deriving the survival coefficients for depreciable physical property. By a survival coefficient is meant the percentage of original units of a good acquired in a given period, that may be expected to survive to a given subsequent period. Of course, the difference between a survival coefficient and 100 percent is the mortality coefficient, or the percentage of original units that may be expected to "die" in a given period. The application of the survival or mortality coefficients will result in a table describing the anticipated retirement schedule of a given physical good. This type of information can obviously be of considerable value in constructing depreciation schedules, capital budgets, and similar programs that are of interest to accountants. This paper consists of two parts. First, it illustrates a mechanical procedure for calculating the survival coefficients based on the above two parameters, average service life and maximum service life, both statistics often being obtainable from market research or engineering studies. Second, the mathematical appendix in which the underlying formulas are developed for those who desire them.