How to Calculate How Long Money Lasts with Annual Withdrawals

Introduction

When planning for retirement or other long-term financial goals, it's important to know how long your savings will last if you withdraw money annually. This calculation helps you estimate your financial lifespan based on your current savings, withdrawal amount, and expected return on investment.

The key factors in this calculation include:

• Initial investment amount
• Annual withdrawal amount
• Expected annual return rate

By understanding these factors, you can make more informed decisions about your financial future.

Formula

The formula to calculate how long money will last with annual withdrawals is based on the future value of an annuity. The calculation determines how many years your money will last given an initial investment, annual withdrawals, and an expected return rate.

This formula assumes that the initial investment grows at the expected return rate each year, and the annual withdrawal is made at the end of each year.

Example Calculation

Let's say you have $100,000 saved up and want to withdraw $5,000 each year. If you expect an annual return of 4%, how long will your money last?

This means your money will last approximately 20.8 years with these assumptions.

Interpreting Results

The result from the calculation gives you an estimate of how long your money will last. Keep in mind that this is an estimate and actual results may vary based on market conditions and other factors.

If the number of years is less than expected, you may need to adjust your withdrawal amount or increase your savings. If the number of years is more than expected, you may have more flexibility in your financial planning.