FreeToolStation

Payback Period Calculator

When an investment has paid for itself.

Finance Calculators Free, no sign-up Runs in your browser

Used when the returns are even.

For the discounted payback period. Zero ignores the time value of money.

Used when the returns differ. Do not include the investment itself.

—
Payback period
—
Discounted payback
—
Recovered by the end
—
Return on investment
—
Average return per period
PeriodReturnCumulativeDiscountedCumulative discounted
Payback ignores everything that happens after the money is recovered, which is why it is a risk measure rather than a profitability one. A project that pays back in two years and then stops is worse than one that pays back in four and runs for twenty.

About the Payback Period Calculator

Payback Period Calculator finds the point at which the money coming back equals the money that went in. With even returns it is a division; with uneven ones it has to be accumulated period by period, and the fractional part is interpolated within the period that crosses the line, which is why the answer comes out as 3.25 periods rather than being rounded to four.

The discounted payback period is shown next to it because the plain version pretends money arriving in year five is worth as much as money arriving now. Discounting the returns before accumulating them always pushes the payback out, sometimes past the end of the project, and that gap is the clearest demonstration of why the simple measure flatters slow projects.

Payback is a risk measure rather than a profitability one. It tells you how long your money is exposed and nothing at all about what happens afterwards, which is why a project with a fast payback and a short life can look better than a far more valuable one. Use it alongside net present value rather than instead of it.

This is arithmetic, not financial advice. It tells you what the numbers do; it cannot tell you whether a decision is right for your circumstances. Fees, taxes and local rules vary, so check anything that matters against the actual offer and speak to someone qualified before committing.

Everything is worked out inside your browser. Nothing you enter is uploaded, logged or stored, which matters for the financial calculators in particular: the figures you put into them are nobody else's business.

Looking for something this does not cover? FreeToolsZone.org is more free browser-based tools, organised by job, and it is worth a look if payback period calculator is only part of what you are working on.

How to use the Payback Period Calculator

  1. Choose returns areThe fields below change to match what you pick, so only the figures that matter to your case are asked for.
  2. Enter initial investment, return each period and discount rate (% a period)Decimals are fine, and thousands separators are accepted and ignored.
  3. Read the payback period, discounted payback and recovered by the endThe figures update as you type. The Calculate button is there if you would rather press something, but nothing waits for it.
  4. Copy or check the resultCopy the summary with the copy button, or open the table to check it row by row.

Features

  • Shows payback period, discounted payback, recovered by the end, return on investment and average return per period together, so you are not running it twice
  • A results table you can read across
  • Updates as you type, with no button to press and no page reload
  • Copy the result in one click
  • Free, no sign-up, and it runs entirely in your browser

Who uses this tool

The payback period calculator is used by writers, developers, students, marketers and anyone else who needs the job done once without installing software. Common cases include:

  • Working out when equipment pays for itself
  • Comparing two projects by how long capital is at risk
  • Checking the payback on an energy efficiency upgrade
  • Seeing how much discounting pushes the payback out

Frequently asked questions

What is a good payback period?

It depends entirely on the life of the thing you bought and the risk. Two years is excellent for software, unremarkable for a building. Compare it against the asset's useful life.

Why is the discounted payback longer?

Because each return is worth less than its face value once you account for the time it takes to arrive. The later the return, the bigger the reduction.

Should I use payback or NPV?

NPV to decide whether a project creates value, payback to understand how long you are exposed. They answer different questions and disagree often enough to be worth running both.

If the payback period calculator is not quite what you need, these other free tools solve closely related problems, and there are 38 more in finance calculators.

NPV Calculator

NPV, IRR and payback period from any cash flow list.

Finance Calculators Use tool

IRR Calculator

Internal rate of return for any series of cash flows.

Finance Calculators Use tool

ROI Calculator

Net gain, ROI and the annualised figure from what you put in and got out.

Finance Calculators Use tool

Break-Even Calculator

Break-even units and revenue from fixed costs, variable costs and price.

Business Calculators Use tool

Checked and rebuilt on 2026-10-14. The method this calculator uses is described in the section above, and corrections go through the contact page.