Internal Rate of Return Calculator
Find a bounded periodic IRR for an initial outlay followed by nonnegative receipts.
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How to use Internal Rate of Return Calculator
Bisection finds the rate where a conventional cash-flow stream has zero NPV. The result is periodic and includes a numerical residual.
- Enter initial outlay followed by receipts.
- Check the model, units, and supported limits before calculating.
- Run the tool, inspect the result, then copy or download it.
Good to know
- Negative period-0 outlay and nonnegative later flows only; 2–1,201 entries. Rate search −99.9% to 1,000%, 160 iterations. Nonconventional or unbracketed streams are rejected.
- Runs locally. Numeric inputs are bounded; floating-point output is approximate and rounded to 12 significant digits. Unsupported or non-finite calculations produce an error.
- Educational user-assumption arithmetic only. No live rates, tax rules, financial advice, or outcome guarantees.
Common questions
How does Internal Rate of Return Calculator calculate its result?
Bisection finds the rate where a conventional cash-flow stream has zero NPV. The result is periodic and includes a numerical residual.
What assumptions and boundaries apply?
Negative period-0 outlay and nonnegative later flows only; 2–1,201 entries. Rate search −99.9% to 1,000%, 160 iterations. Nonconventional or unbracketed streams are rejected.
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