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Investment payback period calculator

Enter the amount invested and the expected annual cash flow from the project (profit or net cash inflow). The calculator works out how many years it takes for the investment to pay back.

Net cash inflow from the project per year — profit plus depreciation, if you're working from profit

Result

Payback period

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This calculation is for informational purposes only and does not replace advice from a qualified professional. Formulas and rates may not fit your exact situation — double-check the figures before making decisions.

How it is calculated

Simple payback period = investment amount ÷ annual cash flow. The calculation assumes the cash flow is the same every year — if the flow varies by year, it's more accurate to compute it cumulatively: sum the flow year by year until the total matches the investment.

This is a simple, non-discounted period — it doesn't account for money received in 5 years being worth less than money received today. For a period that accounts for the time value of money, use the discounted payback period, and for a full project evaluation, use NPV and IRR.

The payback metric says nothing about what happens to the cash after the investment is recovered — a project with a shorter payback period isn't always better than one with a longer payback but a higher overall return.

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