Payback Period Calculator
The payback period calculates how long it takes for an investment to recover its initial cost through cash inflows. Enter your initial investment and expected cash flows for each year. The calculator shows the break-even point, helping you assess investment risk and liquidity needs.
Payback period concept
Payback Period = Year before full recovery + (Unrecovered cash / Year cash flow)
This uses linear interpolation within the recovery year.
How to use this calculator
- Enter your initial investment as a negative number (e.g., -100,000).
- Enter expected annual cash inflows, separated by commas (e.g., 30000,30000,30000).
- The calculator shows the payback period in years and months.
- Use this to evaluate how quickly you recover your investment.
Payback period limitations
- Does not account for the time value of money (interest/inflation).
- Ignores all cash flows after the payback point.
- Does not indicate profitability, only liquidity.
- Use alongside NPV and IRR for complete analysis.
Payback period calculator: frequently asked questions
What is payback period?
Payback period is the time it takes for an investment to recover its initial cost through cash flows. It answers the question: how long until I get my money back?
Is payback period a good metric?
Payback period is simple but limited. It ignores cash flows after break-even and does not account for the time value of money (discounting). Use it alongside NPV and IRR.
What is a good payback period?
It depends on your industry and risk tolerance. For safe investments, 3-5 years is typical. Riskier ventures might require payback in 1-2 years.
How do you handle uneven cash flows?
This calculator uses linear interpolation within the year where cumulative cash flow turns positive, giving a decimal payback period (e.g., 3.5 years).
Does this account for inflation?
No, this is a simple payback period. Discounted payback period accounts for inflation but is more complex.
Official sources
- U.S. Securities and Exchange Commission: Investor Education.
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. See our methodology.