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Payback Period Calculator

Calculate simple and discounted payback period for any investment with up to 10 years of cash flows.

What is Payback Period Calculator?

A payback period calculator tells you how long it takes to recover your initial investment from future cash flows. The simple payback period ignores the time value of money; the discounted payback period accounts for it by discounting each cash flow at your required rate of return before accumulating them.

How to use

  1. 1 Enter the initial investment amount.
  2. 2 Enter expected annual cash flows for up to 10 years.
  3. 3 Enter a discount rate for the discounted payback period calculation.
  4. 4 Simple and discounted payback periods appear along with cumulative cash flow at year 10.
  5. 5 A shorter payback period means faster capital recovery and lower risk.

Formula

Simple payback = years until cumulative cash flows ≥ initial investment. Discounted payback = years until cumulative discounted cash flows ≥ initial investment, where discounted CF_t = CF_t / (1 + r)^t.

Example calculation

Invest $100,000. Cash flows: $30K, $35K, $40K, $25K. Simple payback ≈ 2.88 years. At 10% discount rate, discounted payback ≈ 3.4 years.

Frequently asked questions

What is a good payback period?

It depends on the industry and investment type. Equipment investments often target 2–4 years. Real estate investors might accept 7–10 years. Software projects often need payback within 1–2 years. Compare against your company's hurdle.

Why use discounted payback instead of simple?

The simple payback ignores the fact that money received sooner is worth more. The discounted payback adjusts for this, giving a more conservative and accurate view of when you truly break even in real terms.

What are the limits of payback period analysis?

Payback period ignores all cash flows after the breakeven point, so it can't compare profitability. A project that pays back in 2 years but earns nothing afterward is worse than one that pays back in 3 years and earns for 20. Use alongside IRR and NPV.

What discount rate should I use?

Use your weighted average cost of capital (WACC), your required rate of return, or a hurdle rate set by your organization. Common starting points are 8–15% for business investments.

What if the investment never pays back?

If cumulative cash flows never reach the initial investment within the entered years, the calculator shows N/A. This means the investment does not break even in the timeframe analyzed — a red flag.