IRR Calculator
Compute the internal rate of return on a series of cash flows — the discount rate that makes NPV zero.
Cash Flows
IRR
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Run calculation
Periods—
Sum of cash flows—
IRR—
IRR vs. NPV
NPV gives a dollar value; IRR gives a percentage. Investors compare IRR across projects to allocate capital. As a rule, accept projects where IRR exceeds your cost of capital.
Frequently Asked Questions
What about multiple sign changes?
IRR can have multiple solutions when cash flows alternate signs more than once. The calculator returns the first reasonable root; for unusual cash-flow patterns, use modified IRR (MIRR).
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