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Modified Internal Rate of Return (MIRR) Calculator

Modified Internal Rate of Return Calculator


What is Modified Internal Rate of Return (MIRR)?

MIRR is a capital budgeting tool used to compare the different investments. It is a variation of the Internal Rate of Return (IRR) tool.
With IRR, it is assumed that funds from the project are reinvested at the project’s rate of return. With MIRR, it is assumed that funds from the project are reinvested at the firm’s cost of capital (which is often different from the rate of return of a proposed project).

How is MIRR calculated?

MIRR is calculated using a time value calculation.
\text{MIRR} = \sqrt[text{Number of Periods}]{\frac{text{Future Value of Positive Cash Flows at Reinvestment Rate}}{-(\text{Present Value of Negative Cash Flows at Finance Rate})}} - 1

What is Present Value?

Present Value (PV) is the total value at the beginning of the time period.

What is Future Value?

Future Value (FV) is the total value at the end of the time period.

What are periods?

Periods are the number of times that compounding (and payments) take place.

What is the rate?

The rate is the amount of interest earned per compounding period.

What is Payment (PMT)?

A payment is an amount either deposited or withdrawn at each compounding period. A negative number designates an amount that is deposited, while a positive one withdrawn. For example, if $100 is deposited each compounding period, it would be entered as '-100', while if $75 was payed out each compounding period, it would be entered as '75'.

What is Payments at start or end of period?

A payment at the beginning of a period would mean that the payment (or deposit) occurs at the beginning of each period. A payment at the end of a period would mean that the payment (or deposit) occurs at the end of each period.

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