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Internal Rate of Return Calculator

Solve the periodic return for an initial outlay followed by nonnegative cash receipts.

Your numbers

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Internal rate of return per period
9.701%

Calculated from your inputs · rounded for display

NPV at this rate-$0.00

Periodic cash flows only. IRR is per entered period, not automatically annualized, and is not an investment recommendation.

Your calculation, step by step

No black boxes
  1. Find the rate r where Σ CFₜ/(1+r)^t = 0.
  2. For one negative initial outlay and nonnegative future receipts, NPV decreases with the discount rate.

What if things were different?

Save up to three scenarios, then change your inputs to compare the possibilities.

How to use this calculator

  1. Enter your own values in the labeled fields. Check the units and assumptions before comparing results. Only the fields needed for your selected calculation mode are shown.
  2. Your answer updates automatically. Review the calculation steps to see exactly how it was calculated.
  3. Copy, share, save, or download your result. Saved inputs stay on this device.

How the calculation works

0 = Σ CFₜ / (1+IRR)^t

The solver supports one negative initial outlay followed by nonnegative receipts. Nonconventional sign patterns receive an explicit limitation instead of an assumed unique root. The result is per period; irregular-date XIRR is not implemented. Review the units, period and assumptions before comparing scenarios. Displayed values are rounded, while the underlying calculation retains its available precision.

A worked example

An initial −$1,000 followed one period later by $1,100 has an IRR of 10% for that period.

Reading your result

Use the main result together with its units and supporting figures. Display values are rounded; calculations keep their underlying precision. A change in inputs or assumptions can change the answer. Compare the step-by-step working with your intended use before relying on an estimate.

Frequently asked questions

What assumptions does this calculation use?

The solver supports one negative initial outlay followed by nonnegative receipts. Nonconventional sign patterns receive an explicit limitation instead of an assumed unique root. The result is per period; irregular-date XIRR is not implemented.

Can I save or check a scenario?

The result includes the working and supporting values. Save and Restore keep inputs on this device; Copy, Download and Print export the result. Sharing a scenario explicitly includes the inputs in its link.

Sources & methodology

This calculator uses the mathematical identity and assumptions stated above. No current rates, prices, or external data are loaded. Conversion tools use international unit definitions.

Formula review: October 24, 2026. Read our methodology.