IRR Calculator

Find the discount rate at which a cash-flow series breaks even. Enter your own values below to see IRR per cash-flow period and check the method behind it.

All calculators

Your inputs

Change the example values to match your situation.

Negative = invested / paid; positive = received. Include the initial investment as the first entry.

Your result

Let’s work it out.

Fill in your inputs and select Calculate.
Your result and breakdown will appear here.

How this calculator works

IRR is the periodic rate that makes discounted cash flows sum to zero.

Before you use the result

  • Cash flows must be equally spaced. For dated irregular flows use XIRR. IRR is per period, not automatically annual. Multiple detected roots are rejected.

KEEP EXPLORING

View category
SIP CalculatorStep-up SIP CalculatorLumpsum Investment CalculatorSWP CalculatorMutual Fund Returns CalculatorCAGR Calculator

What is IRR Calculator?

IRR Calculator helps you find the discount rate at which a cash-flow series breaks even.

The main result is IRR per cash-flow period. The formula, example and assumptions below explain how to interpret it.

How to use IRR Calculator

Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.

  1. Gather equally spaced cash flows, starting at time zero. Use values from the same situation or reporting period.
  2. Replace the example equally spaced cash flows, starting at time zero with your own value, then complete the other fields. Check the displayed units.
  3. Select Calculate and read IRR per cash-flow period. Change one input and calculate again to compare a second scenario. Reset restores the original example.
  • Enter equally spaced cash flows, starting at time zero in the format shown by the example. Keep the same separators and row structure. Negative = invested / paid; positive = received. Include the initial investment as the first entry.

IRR Calculator: a worked example

With the inputs below, the result is 8.896339 % (IRR per cash-flow period). Follow the example, then replace these illustrative values with your own.

Example inputs and output
Input or outputExample value
Equally spaced cash flows, starting at time zero-100000, 30000, 40000, 50000
IRR per cash-flow period8.896339 %

Understanding the IRR result

The main output is IRR per cash-flow period, expressed in %. It applies to the inputs and operation you selected.

Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.

IRR Calculator: assumptions and common mistakes

A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.

  • Cash flows must be equally spaced. For dated irregular flows use XIRR. IRR is per period, not automatically annual. Multiple detected roots are rejected.
  • A projected return is an assumption. Check whether fees, tax and inflation are included before comparing products.

For wider guidance, visit SEBI Investor Education. The formula and scope of this specific tool are stated on this page.

IRR Calculator FAQs

What does IRR Calculator calculate?

IRR Calculator helps you find the discount rate at which a cash-flow series breaks even. Its main output is IRR per cash-flow period in %.

What inputs do I need for IRR Calculator?

You need equally spaced cash flows, starting at time zero. Negative = invested / paid; positive = received. Include the initial investment as the first entry.

Which formula does IRR Calculator use?

IRR is the periodic rate that makes discounted cash flows sum to zero.

What is a worked example for IRR Calculator?

Example inputs: Equally spaced cash flows, starting at time zero: -100000, 30000, 40000, 50000. The result is 8.896339 % (IRR per cash-flow period).

How should I enter equally spaced cash flows, starting at time zero?

Enter equally spaced cash flows, starting at time zero in the format shown by the example. Keep the same separators and row structure. Negative = invested / paid; positive = received. Include the initial investment as the first entry.

Why might the displayed result be rounded?

The result display limits decimal places to keep numbers readable. Very small values may use scientific notation. Keep extra precision during a manual calculation, then round the final answer for comparison.

How should I read IRR per cash-flow period?

The main output is IRR per cash-flow period, expressed in %. It applies to the inputs and operation you selected.

Why might my IRR Calculator result differ from my records?

Cash flows must be equally spaced. For dated irregular flows use XIRR. IRR is per period, not automatically annual. Multiple detected roots are rejected. Differences in entered values, units or rounding can also change the comparison.

Can I compare two scenarios in IRR Calculator?

Yes. Note your first IRR per cash-flow period, change equally spaced cash flows, starting at time zero or another input, and select Calculate again. Editing a field clears the old result so it is not mistaken for a new calculation.

Is IRR Calculator free, and where are my inputs calculated?

This calculator is free to use without signing in. Its formula runs in your browser; calculator inputs are not sent to a calculation API. The inputs reset to the example values when you reset the form or start a fresh page.