What this calculator measures
Estimate how long level cash inflows take to recover an initial investment.
Simple payback ignores discounting and cash flows after recovery. Enter values from the same reporting period and retain the source data so the result can be reproduced.
Common use cases
Use this model when the inputs describe the same decision, period and customer or product scope.
- Estimate how long level cash inflows take to recover an initial investment.
- Use the result with the recorded inputs: Initial investment, Annual net cash inflow.
- Compare multiple scenarios before making a finance decision.
Formula
Simple payback ignores discounting and cash flows after recovery.
Payback Period: formula, inputs and interpretation
Simple payback ignores discounting and cash flows after recovery.
Formula
Example input values
Worked calculation and answer
A $90,000 investment with $30,000 annual net inflow has a three-year simple payback.
Variable definitions and checks
- Initial investment (initial): Use a numeric value at least 0. Check its reporting period and definition before comparing it with other inputs.
- Annual net cash inflow (cashflow): Use a numeric value at least 0. Check its reporting period and definition before comparing it with other inputs.
When the result may mislead
The calculation reflects the variables named above, not unentered taxes, platform terms, reporting delays, financing charges or external forecasts. For comparisons, keep the same units and reporting period and change one assumption at a time.
How to interpret the result
Use NPV or IRR as well when timing, risk, and post-payback value matter.
Use the result as a decision aid rather than a standalone conclusion. Compare trends and scenarios using unchanged definitions.
Assumptions and limitations
- Inputs use compatible periods and definitions.
- Amounts are entered before rounding unless stated otherwise.
- The model excludes fields not shown in the calculator.
- Material accounting, tax, legal, and investment decisions require independent verification.
Frequently asked questions
What does Payback Period measure?
Simple payback ignores discounting and cash flows after recovery.
How should I compare results?
Use the same definitions, currency, period, and data source for every comparison.
Is this result a forecast?
No. It is a deterministic estimate based only on the values entered and does not predict future conditions.