Compute the number of years for cumulative cash flows to turn positive — the time needed to recover the initial investment.
收回初始投资所需的年数。
| Item | Formula | Source / Standard |
|---|---|---|
| Payback period | Year when the cumulative cash flow turns positive | payback period |
| Cumulative cash flow | Sum of cash flows year by year | cumulative cash flow |
| Discounted payback | Based on discounted cash flows | discounted payback |