Payback Period Calculator
0 years to break even
| Year | Cash Flow | Cumulative (Simple) | Discounted Cash Flow | Cumulative (Discounted) |
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How the Payback Period Is Calculated
This calculator assumes a single upfront investment followed by equal annual cash flows, which is the standard simplified model used for quick capital-budgeting decisions. The simple payback period is the point at which cumulative cash flow equals the initial investment; if that happens partway through a year, the calculator interpolates a fractional year rather than rounding up to the next whole year. The discounted payback period applies the same logic to cash flows that have first been reduced by your discount rate, since a dollar received five years from now is worth less than a dollar today.
Why the Discounted Version Usually Takes Longer
Because future cash flows are worth progressively less in today's terms, the discounted payback period is always equal to or longer than the simple payback period — and if your discount rate is high enough relative to your cash flows, the project may never pay back at all within the projection window. If a project only clears the simple test but not the discounted one, that's a signal to look more closely at the true cost of capital before committing.
Payback Period Is a Screening Tool, Not a Full Answer
Payback period ignores everything that happens after the break-even point, so it can favor a fast, low-return project over a slower one that ultimately generates far more value. Use it to screen out obviously weak or too-risky options, then confirm your top choice with a return-based measure — the IRR calculator or ROI calculator can tell you whether the investment is actually worthwhile over its full life, not just how fast it recoups cash.
Frequently Asked Questions
What is a good payback period?
It depends on the industry and the project's risk, but many businesses use 2-3 years as a rough benchmark for equipment or small projects, while larger capital investments may tolerate 5+ years. Shorter is generally safer because it reduces exposure to future uncertainty, but a very short payback requirement can cause you to reject profitable long-term projects.
Why does this calculator show two different payback periods?
The simple payback period ignores the time value of money and just counts raw cash flows until they equal your initial investment. The discounted payback period first shrinks each future year's cash flow using your discount rate, so it always takes the same amount of time or longer to reach break-even, giving you a more realistic picture of when you actually recover your investment in today's dollars.