Payback Period Calculator: Simple and Discounted Payback
The payback period is how long an investment takes to earn back what it cost — a quick test of risk and liquidity for any project.
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How Payback Is Calculated
Even cash flows: Payback = Initial investment ÷ Annual cash flow
Example: 100,000 invested with cash flows of 30,000, 35,000 and 40,000: after two years 65,000 is recovered, and 35,000 of the third year’s 40,000 completes it — a payback of 2.88 years.
Works in any currency — enter all amounts in the same one.
Discounted Payback
Simple payback treats money received in year five the same as money today. Discounted payback first converts each cash flow to present value at your discount rate, so it is always longer — 3.45 years in the example above at 10%. It is the better measure for long projects.
Strengths and Limits
| Payback period | |
|---|---|
| Easy to explain | Yes — “we get our money back in under 3 years” |
| Shows risk | Yes — shorter payback means less time exposed |
| Considers profit after payback | No — a project earning far more later can look worse |
| Considers time value of money | Only the discounted version |
Frequently Asked Questions
What is a good payback period?
Many small businesses want payback within 2–3 years; larger companies may accept 5 years or more for strategic projects.
What is the difference between payback and break-even?
Break-even is the sales volume needed to cover costs in a period. Payback is the time needed to recover an upfront investment.
Why is discounted payback longer?
Future cash is worth less today, so each discounted cash flow is smaller and it takes longer to add up to the investment.
Can payback be negative or never reached?
If total cash inflows never exceed the investment, the project never pays back within the period entered.