What is the Payback Reciprocal?

The payback reciprocal is the payback period for an investment, divided by 1. This reciprocal yields an approximation of the rate of return on an investment, though only when annual cash flows are uniformly even over the lifetime of the investment, and the cash flows from the project will continue forever.

Payback Reciprocal Example

A financial analyst is reviewing a possible investment of $50,000, which will generate positive cash flows of $10,000 per year. The payback period is 5 years, since cash flows of $50,000 will accumulate over the next five years. The payback reciprocal is 1 / 5 years, or 20%. The calculated internal rate of return using this reciprocal is 15% if the assumed cash flow period is 10 years, and reaches 20% only when the assumed cash flows cover a period of 30 years.

Disadvantages of the Payback Reciprocal

It is quite unlikely that cash flows will continue uninterrupted for a long ways into the future, so the payback reciprocal tends to overstate the actual rate of return of a proposed investment. Instead, it is more realistic to evaluate a project based on the net present value method or the internal rate of return.