IRR Calculator
Internal rate of return from a series of cash flows.
Year 0 first. Negative = outflow. 5 flow(s) parsed.
Internal rate of return
19.2595%
About this calculator
IRR is the discount rate that makes NPV equal zero. Higher IRR = better project, all else equal.
- Solved by bisection over [-99%, 500%].
- For non-conventional cash flows (multiple sign changes), IRR may not be unique.
Frequently asked questions
Why does IRR sometimes fail?
When cash flows change sign more than once, the polynomial can have multiple roots. NPV is more reliable in that case.
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Calculator NZ provides general information only. For decisions with significant financial, medical or legal consequence please consult a qualified professional.