Use the fatfire calculator to determine how much money you need to achieve financial independence and early retirement.

## How to Use the FATFIRE Calculator

This calculator will help you determine the monthly savings needed to reach your FATFIRE (Financial Independence, Retire Early) goal. Follow these steps:

- Enter your annual expenses in the ‘Annual Expenses ($)’ field.
- Input the number of years you have until you plan to retire in the ‘Years Until Retirement’ field.
- Provide your estimated annual investment return rate as a percentage in the ‘Estimated Investment Return Rate (%)’ field.
- Enter a safe withdrawal rate as a percentage in the ‘Safe Withdrawal Rate (%)’ field.
- Type in your current savings in the ‘Current Savings ($)’ field.
- Click the ‘Calculate’ button to see the result in the ‘Result’ field.

## How It Calculates the Results

The calculator determines how much you need to save each month to reach your retirement goal by taking into account your current savings, estimated investment returns, and the number of years until you retire. Here’s a breakdown of the calculations:

**Future Value of Investments:**Calculates how much your current savings will grow based on the given investment return rate over the years until retirement.**Required Portfolio:**Computes the total amount needed to sustain the specified annual expenses using the safe withdrawal rate.**Monthly Savings:**Determines the additional savings required per month to bridge the gap between the future value of your investments and the required portfolio.

## Limitations

While this calculator provides estimates based on the data provided, it’s important to consider the following limitations:

- Investment returns are assumed to be constant, but actual returns can fluctuate.
- This tool does not account for inflation, taxes, or changes in expenses.
- It presumes that you will adhere strictly to the withdrawal rate without any emergencies or unexpected expenses.