Payback Period
Investment recovery time
About This Calculator
The payback period is the time required for an investment to generate enough cash flows to recover the initial investment cost. It is a simple risk metric — shorter payback means less exposure. While easy to calculate, it ignores cash flows after payback and the time value of money; the discounted payback period addresses the latter limitation.
Formula
Payback period = Initial Investment / Annual Cash Flow (for uniform flows)
For uneven flows: accumulate cash flows year by year until they equal the initial investment
Discounted payback: use present value of cash flows at discount rate r
Example Calculation
$50,000 investment; generates $12,000/year cash flow
- Payback = $50,000 / $12,000 = 4.17 years
Payback period = 4 years and 2 months
Payback Period by Annual Cash Flow (Initial Investment $50,000)
| Annual Cash Flow | Payback Period |
|---|---|
| $5,000 | 10.0 years |
| $8,000 | 6.25 years |
| $10,000 | 5.0 years |
| $12,000 | 4.2 years |
| $15,000 | 3.3 years |
| $20,000 | 2.5 years |
| $25,000 | 2.0 years |
Frequently Asked Questions
What is a good payback period?
It depends on the industry and type of investment. Many businesses target 2-3 years for equipment purchases. Longer-lived assets like real estate or infrastructure can have acceptable payback periods of 5-10+ years. Compare to asset useful life.
What is the discounted payback period?
The discounted payback period accounts for time value of money by using the present value of cash flows. It is always longer than the simple payback period and gives a more conservative (accurate) estimate of when you recover your real investment value.
What does payback period not tell you?
Payback ignores all cash flows after the payback date — a project paying back in 2 years might earn little afterward. It also ignores the magnitude of returns. Net Present Value (NPV) is a more complete metric that considers all cash flows.
How is payback period used in practice?
Companies use payback as a quick initial filter: projects with payback beyond the cutoff (e.g., 3 years) are rejected without further analysis. Those within the cutoff receive full NPV and IRR analysis. It prioritizes capital recovery and liquidity.