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The payback period is the time required for an investment to generate cash flows sufficient to recover its initial cost. It's one of the most widely used capital budgeting metrics because it directly answers: "When do I get my money back?"
Simple payback period formula
Payback Period (years) = Initial Investment / Annual Net Cash Flow
At $200k investment and $80k annual net cash flow: 200k / 80k = 2.5 years.
Discounted payback period
The discounted payback period accounts for the time value of money by discounting each year's cash flow:
PV of Year N Cash Flow = Annual Cash Flow / (1 + Discount Rate) ^ N
The discounted payback period is always longer than the simple payback period. At 10% discount rate, a $200k investment with $80k/year simple payback of 2.5 years becomes approximately 3.1 years discounted.
Payback period benchmarks
| Payback Period | Assessment |
|---|---|
| < 6 months | Exceptional — rare, typically software/SaaS |
| 6–12 months | Excellent — fast return on capital |
| 1–2 years | Good — standard for marketing investments |
| 2–4 years | Acceptable — typical for capital equipment |
| > 4 years | Long — requires stable, predictable cash flows |
Limitations of payback period
Payback period ignores cash flows after the break-even point. A $200k investment with a 2-year payback that then generates $100k/year for 8 more years is far superior to one that generates exactly $80k/year — but they show identical payback periods.
Use payback period alongside ROI and NPV for complete capital budgeting analysis.
Frequently asked questions
What does this calculator do? Calculate simple and discounted payback period from initial investment and annual net cash flows, plus ROI at the end of your analysis period.