How much should you spend in retirement using the 4% rule

Learn how the 4% strategy can help you manage your finances during your retirement years.
4% rule
3 min
10 April 2024

When planning for retirement, individuals often rely on options like pension and superannuation retirement schemes. Most of us also plan for retirement and build a retirement corpus through various investment and saving vehicles. One question that usually confuses individuals nearing retirement—or post-retirement—is how much they can withdraw from these funds.

The 4% rule is often the starting point for retirement planning. It guides and provides an understanding of your finances and helps navigate your spending capabilities. We have prepared the following comprehensive guide to help you understand the 4% rule, which will help you with your retirement planning.

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Understanding the 4% rule

The 4 percent rule is based on the premise that you can withdraw a certain amount from your retirement fund each year and not outlive your savings for 30 years. Life expectancy plays a vital role in the 4% rule as it works effectively for 30 years of retirement. Thus, it may not be practical for those who need their portfolios to provide a steady income for more than 30 years.

History of 4% rule

In the mid-1990s, Bill Bengen analysed 50 years of retirement data—from 1926 to 1976. He analysed historically marked data on stocks, shares, and bonds, using actual market returns from 1926 to 1976. For those retiring in 1976, he analysed whether their portfolio would serve them for the next 30 years.

It is to be noted that Bengen did not coin the term ‘4% rule’; it came from the work he had done and the results he documented. Bengen observed that a first withdrawal rate of 4% allowed most portfolios to last 50 years or even more. The portfolios that fell short lasted about 35 years or longer. That was more than enough for most of the retirees who had invested.

This makes the 4% rule one of the simplest yet effective tools for retirement planning. This rule proposes withdrawing 4% of the retirement portfolio in the first year. Then, over 30 years, adjust for the inflation rate year after year in the withdrawal amount of the total retirement portfolio.

Knowing the rule

The 4% rule has had its fair share of assumptions and criticisms. The rule is based on specific constraints around asset allocation and may lead to varied results with related fees, inflation, and market risks.

Moreover, Bengen realised that holding very few stocks was more detrimental than holding too many. He also observed that the 50:50 allocation was ideal, provided the investor’s goal was portfolio longevity.

Pros and Cons

Let us now take a closer look at the advantages and disadvantages of the 4% rule.


  • Simplicity: The 4% rule is easy to follow and implement. Its uncomplicated nature helps retirees and soon-to-be-retirees understand and plan their withdrawal habits.
  • Historical basis: The rule is based on extensive research by Bill Bengen on real-life scenarios of retirees. The results are backed by historical data, making it a viable option with high credibility.
  • Preservation of capital: This rule allows retirees to strike the ideal balance between spending and saving. The pain of saving and the guilt of overspending can be evened out by following this rule.
  • Adjustment for inflation: Retirees can adjust their spending amount based on the prevailing inflation rate. This allows them to enjoy their lifestyle without compromising on their income.


  • Market volatility: The data taken for the research and analysis was historical. Considering the market is dynamic, this rule may not always be applicable.
  • Expenses: The rule assumes that the retiree's spending will stay constant throughout the years. It fails to consider the possibility that the expenses will increase with increased health requirements and support.
  • Same hat, different heads: The rule works on the assumption that the same ratio of stocks and bonds and the same rule of withdrawing 4% will work for everyone. It is important to consider your financial position and situation to craft a proper financial plan that suits your requirements and goals.

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Alternatives to the 4% rule

Most financial experts today consider making adjustments to the 4 percent rule to factor in modern economic realities. One suggestion is to opt for a more flexible withdrawal rate—one that is lower than 4%, given the current market valuations and expected returns. The alternatives to the 4% retirement rule include dynamic spending plans and relying on a total return approach instead of a rigid withdrawal percentage. These help you adapt to market fluctuations and personal circumstances.


Your retirement can be peaceful or challenging based on your financial planning. Balancing your savings and expenditures can be incredibly difficult, and this is where the 4 percent rule comes into the picture. This simple yet effective method helps you find the right balance to achieve your financial goals. However, you must understand the risk factors, financial goals, and spending behaviour to decide if it is a good fit.

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