Payback Period Calculator
When could your investment recover its initial cost? Compare regular and discounted payback using monthly or annual net cash flows.
Your results
Choose your assumptions and click Calculate payback.
Cumulative recovery
Blue: regular balance. Green: discounted balance. Dashed line: initial cost fully recovered. Lines connect period-end balances.
Cash-flow schedule
| Period | Net cash flow | Discounted cash flow | Cumulative balance | Discounted balance |
|---|
Understanding your payback period
The payback period measures how long it takes cumulative net cash inflows to recover an initial investment. Enter the investment as a positive cost at time zero, then enter operating cash receipts minus cash expenses for each later period. Do not include the initial cost again in your cash-flow list.
Regular versus discounted payback
Regular payback adds cash flows without adjusting their value over time. Discounted payback first converts each future cash flow to present value using your selected discount rate. The calculation stops at your chosen horizon: “Not recovered” means the investment has not recovered within that horizon, not that recovery is impossible forever.
Example
A 50,000 investment generating 12,000 each year has a simple fractional payback of 50,000 ÷ 12,000 = 4.17 years if cash is assumed to arrive throughout the recovery year. If cash arrives only at year-end, recovery occurs at the end of year 5. These timing assumptions explain why two calculators can produce different answers.
Which formulas does this calculator use?
Present value of period t’s cash flow = cash flow ÷ (1 + annual discount rate)t ÷ periods per year. NPV is the sum of those present values minus the initial investment. For regular cash flows with growth, period t’s cash flow = first cash flow × (1 + annual growth rate)(t − 1) ÷ periods per year.
How does fractional payback work?
When enabled, the unrecovered balance before the crossing period is divided by that period’s positive cash flow. For discounted payback the same interpolation uses discounted amounts. This is an approximation between schedule endpoints, not an exact receipt date or a continuous-discounting solution.
What if later cash flows are negative?
The result reports the first recovery of the initial cost. Later losses can take the cumulative balance below zero again. The calculator flags this situation; review the entire schedule and the final balance.
Does a short payback guarantee a good investment?
No. Payback alone does not capture all later cash flows, uncertainty, or the size of a project’s total value. Review NPV and the full cash-flow forecast as well. The discount rate is your assumption, not a predicted or guaranteed return.
Are taxes, financing, and resale proceeds included?
Only when included in the net cash flows you enter. For a final sale or disposal cost, use the different-amounts mode and add that amount to the relevant period. Use a discount rate consistent with your cash-flow assumptions.
Planning estimates only. Forecasts and discount rates are supplied by you; actual outcomes can differ.