Payback Period Calculator – Estimate Investment Recovery
Find how long an investment takes to repay its initial cost.
About the Payback Period Calculator
What is the Payback Period Calculator?
A payback period calculator shows how long it takes for an investment or project to repay its initial cost from its cash inflows.
Why use this calculator?
Payback is a simple risk measure: the shorter the period, the sooner the capital is recovered. It is widely used for capital budgeting and small business decisions.
How to use it
- Enter the initial investment.
- Enter the expected annual cash inflow.
- Optionally add a discount rate for a discounted payback.
Formula
Simple payback = investment ÷ annual cash flow.
Payback ignores cash flows after the break-even point and, unless discounted, the time value of money.
Frequently Asked Questions
What is a good payback period?
It depends on the industry and risk. Many companies prefer payback within three to five years, faster for volatile businesses.
Why use discounted payback?
It accounts for the time value of money, so later cash flows count less. The discounted payback is always longer than the simple one.
What is compound interest?
Compound interest is interest earned on both your original money and on previously earned interest. Over time it can make savings grow much faster than simple interest.
What is the difference between nominal and effective return?
The nominal return ignores compounding within the year, while the effective (annualised) return accounts for it. The effective figure is usually higher and better reflects real growth.
How does inflation affect my returns?
Inflation erodes purchasing power. The real return is the nominal return minus inflation, so an investment can grow in dollars yet still lose value in what it can buy.
What rate of return should I assume?
A common long-term assumption for a diversified stock portfolio is about 6% to 8% per year after inflation, but returns vary and are never guaranteed.
Does this account for taxes and fees?
Unless stated, the tool shows pre-tax, pre-fee growth. Subtract your fund expense ratio and expected tax rate to estimate what you keep.
Is this calculator free to use?
Yes. Every calculator on this site is completely free, with no hidden fees, no subscriptions and no limits on how many times you can use it.
How accurate are the results?
We use standard, widely accepted formulas and calculate in your browser using double-precision arithmetic. Results are rounded for readability, so treat them as reliable estimates rather than a guarantee. Real-world factors can vary the true figure.
Can I add this calculator to my own website?
Yes. Open this calculator page and use the "Add to your website" box in the sidebar to copy a ready-made iframe snippet, then paste it into any HTML page.