Financial / Browser calculator

Payback Period Calculator

Payback Period Calculator works from the inputs you provide and returns simple payback (years). Use the calculation panel to explore a scenario, then check the formula and limitations before applying the result.

Your inputs

Minimum: 0
Minimum: 1e-06

Your results

Enter your values and calculate to see the result.

This estimate is for information and comparison, not financial, investment or tax advice.

Formula and calculation method

Simple payback period = initial investment / constant annual net cash inflow.

Undiscounted payback, assuming a constant annual cash inflow.

How to use payback period calculator

  1. Set Initial investment. The example below uses 10000.
  2. Set Annual net cash inflow. The example below uses 2500.
  3. Select Calculate to update the result. Reset restores the illustrated inputs. Copy, print or download your own result if you need a record.

Worked example

Example inputs
Initial investment
10000
Annual net cash inflow
2500
Simple payback (years)
4

Factors affecting your result

Undiscounted payback, assuming a constant annual cash inflow.

Changing initial investment changes the scenario being evaluated. Adjust one input at a time when comparing results, keep a copy of the assumptions, and compare values using the same unit and period. A precise arithmetic result does not make an uncertain assumption precise.

Frequently asked questions

How does the payback period calculator work?

Simple payback period = initial investment / constant annual net cash inflow.

What inputs does Payback Period Calculator need?

Enter initial investment, annual net cash inflow. Choose values that correspond to the same situation and measurement convention.

How should I interpret the payback period calculator result?

Undiscounted payback, assuming a constant annual cash inflow.

Are my payback period calculator inputs uploaded?

No. The calculation runs in this browser. Favorites, recent tool names, theme and formatting preferences may be saved locally, but calculation inputs are not sent to a calculation server or stored by this website. Shared links do not include entered values.

Maintained by Calculators.buzz Editorial Team. Implementation date: . No professional credentials or clinical review are claimed. Read our methodology policy.