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IRR Calculator — Internal Rate of Return from Cash Flows

Editable live calculator

Change any input — the result updates immediately

No hidden assumptions. Inputs, units and the working stay visible so you can check the calculation.

Optional hurdle / comparison rate (%) Cash flows from period 0 Enter one amount per line or separate values with commas/semicolons. Period spacing must be consistent.

Calculated result

10.4845% IRR

NPV at IRR: -0

NPV at 8% hurdle: 605.36

Detected IRR roots in search range: 1

Cash-flow sign changes: 1

Show the working

1. Evaluate NPV(r) = Σ CFₜ ÷ (1+r)ᵗ across a broad rate grid.
2. Bracket each sign-changing zero and refine it with bisection.
3. First detected root = 10.484529%.

IRR is a mathematical rate from the entered cash flows, not a return forecast or investment recommendation.

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