The 4% Retirement Withdrawal Rule: A Simple Guide

The 4% rule is a well-known guideline for determining how much you can safely withdraw from your retirement savings each year without running out of money too soon.

How It Works
When you retire, you calculate 4% of your total retirement portfolio and withdraw that amount in the first year. In each following year, you adjust the withdrawal for inflation. For example:

• If you have $500,000 saved, 4% of that is $20,000.
• In year one, you withdraw $20,000.
• In year two, if inflation is 3%, you would withdraw $20,600, and so on.

Why It Matters
This rule comes from historical research showing that a 4% starting withdrawal rate—invested in a balanced mix of stocks and bonds—should last about 30 years, even through market ups and downs. It gives retirees a simple way to estimate a sustainable income.

Limitations

• It’s based on past market performance and may not fit every future scenario.
• It assumes you keep a balanced portfolio, not all in cash.
• If you expect a retirement longer than 30 years, you may need to withdraw less than 4%.
• In poor market years, some retirees choose to cut back temporarily to preserve capital.

Bottom Line
The 4% rule is a starting point, not a guarantee. It works best when combined with a personalized retirement forecast that considers your expenses, life expectancy, health care needs, and market conditions.