# Payback Period Calculator

> Calculate the time required to recoup an initial investment.

Page: https://askcalculators.com/calculator/payback-period-calculator/
Definition: https://askcalculators.com/calculator/payback-period-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/payback-period-calculator/schema.json
Version: 7.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/payback-period-calculator/?investment=50000&annualCashFlow=12000

## Inputs
- investment: Initial Investment Cost; type=number; optional; default=50000
- annualCashFlow: Annual Cash Flow / Savings; type=number; optional; default=12000

## Outputs
- result: Result; format=text; primary

## Formula
Payback period = initial investment ÷ recurring net cash inflow, with years and months derived from the fractional result.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.