Why discounted payback period matters to a first-time founder
This measure adds the cost of waiting and risk to a simple payback calculation. It helps founders reject projects that return cash too slowly after considering their required return. However, it can favour short projects and ignore valuable cash generated after the recovery date.
Examples of discounted payback period
A machine costs £100,000 and is expected to generate £45,000 at each year-end for three years. At a 10% discount rate, those inflows are worth about £40,909, £37,190 and £33,809 today. Cumulative discounted inflows recover the outlay during year three.
Common misunderstanding
Discounted payback is not net present value. It asks when discounted inflows recover the initial outlay, while net present value includes all forecast cash flows and reports value added or lost. The answer also depends heavily on the selected discount rate and cash-flow forecast.
When to use it
Use it as a screening tool when liquidity and recovery speed matter, alongside net present value and scenario analysis. Define the discount rate, cash-flow timing and cut-off consistently. Ignore it for decisions where long-term benefits dominate unless another method captures those later benefits.