# How to Calculate Modified Internal Rate of Return (MIRR)?

The modified internal rate of return (MIRR) is a financial metric that can be used to evaluate the profitability of investments. It is often used by accountants and auditors when assessing the feasibility of proposed projects.

The MIRR calculation considers the time value of money, which means that it can be used to compare investment projects with different durations.

It also accounts for reinvestment rate assumptions, which makes it a more accurate measure of true return than the regular internal rate of return (IRR).

This blog post will show you how to calculate MIRR using a simple example. We will also discuss some of its advantages and disadvantages so that you can decide if it is the right tool for your needs.

## What is MIRR, and how is it different from IRR

MIRR, or the Modified Internal Rate of Return, is a formula used to calculate the return on financing investments. At first glance, it may appear very similar to the Internal Rate of Return (IRR).

However, MIRR has an advantage over IRR because it considers two discount rates rather than one.

The reason for having two discount rates is that both positive and negative amounts need to be considered when calculating returns; MIRR will use a lower liability rate than the cost rate when principal repayments happen so that the reinvestment can be taken into account.

This makes MIRR more accurate than IRR because, in addition to figuring out cash flow timing and magnitude, it also adds to potential future returns from reinvestment.

## How to calculate MIRR using Excel

Calculating the Modified Internal Rate of Return (MIRR) using Excel is surprisingly easy. You must enter your initial values and expected cash inflows and outflows into the Excel worksheet.

Then you can use the IRR function to calculate the MIRR for you. It doesn’t take more than a few minutes to input all the data, so it does save a considerable amount of time from having to figure it out manually.

Furthermore, if your equations need editing, you don’t need to redo them repeatedly, as Excel will update accordingly.

So if you are ever in a crunch and need to know your MIRR quickly, now you know that Excel can be invaluable!

MIRR, or Modified Internal Rate of Return, is a powerful tool for evaluating potential investment returns. It considers the amount and timing of cash flows, which makes it different from other metrics like NPV.

MIRR has its advantages—it helps investors anticipate cash flow better while providing a clear understanding of risk-adjusted returns—but it also has drawbacks, such as requiring a consistent reinvestment rate to calculate a project’s true return.

Since that rate can be challenging to predict accurately, MIRR isn’t always reliable. Ultimately, one must always weigh what advantages and disadvantages the tool poses before relying on the results for critical financial decisions.

## Real-world examples of MIRR in action

One of the most well-known real-world examples of MIRR in action is the Mars Pathfinder mission. This aero-assist flyby mission tested technologies needed to pave the way for human planetary exploration and further reduced costs by using a minimum impulse bit rendezvous and intercept maneuver.

Instead of a large amount of fuel, this mission used thrusters and stellar references to guide it on its trajectory.

This method of approach was revolutionary at the time since it required much less fuel than traditional approaches.

As a result, engineers can now design more efficient missions that cost less money and minimize spacecraft weight.

Many space exploration projects are now utilizing MIRR technology due to its proven success from the Pathfinder mission.

## How to interpret your company’s MIRR results

Interpreting your company’s MIRR results is essential to analysis and decision-making; this figure measures how profitable a proposed investment would be for the company.

The MIRR formula looks at the cost versus benefit of the project, taking into account the time value of money to determine its net present value.

A MIRR of ten percent or higher indicates that the project is delivering more than its costs, suggesting that it should be undertaken.

On the other hand, if the MIRR comes out much lower than ten percent, then this leaning against taking on the endeavor could ultimately result in a net loss for your organization.

MIRR is a helpful tool for evaluating investments, but it’s essential to understand how it works and its limitations.

Make sure you know how to calculate MIRR using Excel and interpret your company’s results. If you have any questions, leave them in the comments section below!

## What is the difference between IRR and modified IRR?

IRR and modified IRR are two different types of calculations used to assess the performance of investments. IRR (Internal Rate of Return) measures the profitability of an investment over a period by taking into account all cash flows associated with it; it is also known as the discounted cash flow rate of return.