IRR Calculator
Find the internal rate of return of a cash-flow series.
Estimates for education only — not investment advice. IRR assumes interim cash flows are reinvested at the same rate.
How it works
- 1List the cash flows, starting with the initial investment as a negative number.
- 2The tool solves for the rate that makes NPV zero.
- 3See the internal rate of return.
Use cases
- Compare the return of projects with different cash-flow shapes.
- Check an investment’s return against a target rate.
- Pair with the NPV calculator for a full appraisal.
Frequently asked questions
What is IRR?
The internal rate of return is the discount rate at which an investment’s net present value equals zero. A higher IRR generally means a more attractive investment.
Why does it sometimes show no result?
IRR needs at least one sign change in the cash flows (for example a negative initial investment followed by positive returns). Series without a sign change have no real IRR.
Is my data stored?
No. Everything runs in your browser.
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