What is the rate of return of a whole life insurance policy? There are actually three different rates of return to consider – Internal, External and Eternal rate of return. People often fixate upon the internal rate of return and do so incorrectly. To properly make a side-by-side comparison, you need to strip away the multiple benefits a whole life insurance policy, issued by a mutual life insurance company may provide. This is similar to comparing a single-blade knife to a Swiss Army knife. One has a single function. The other provides many combinations of useful benefits.