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The 25x Rule: Busting the Myth of the Magic Number

For decades, South Africans have been told to use a simple formula to figure out how much money they will need in retirement: multiply their annual expenses by 25.

But retirement is different now. People live longer. Inflation is less predictable. The markets are less stable. And the way people spend money is changing.

Luckily, we’ve got your back.

“The greatest danger in times of turbulence is to act with yesterday’s logic.” (Peter Drucker)

For a long time, South Africans have been told to use a simple formula to figure out how much money they will need in retirement: multiply their annual expenses by 25. The “25× Rule” comes from 4% withdrawal guideline of the 1990s, which was based on the idea of a 30-year retirement, stable markets, and moderate inflation.

It was a good idea back then, but now it often makes people underestimate how much they need to retire comfortably.

• Retirement is different now
• People live longer
• Inflation is less predictable
• The markets are less stable
• The way people spend money changes a lot over time

Because of this, the old shortcut no longer works for planning retirement in today’s world.

More years to live, more years to fund

Many retirees now live into their 80s or 90s. A rule that works for a 30-year retirement might notbe enough for one lasting 35 years or more.


Even small amounts of inflation can double the cost of living over time. A retirement plan that doesn’t take into account rising costs could fall behind what you really need.

The rhythm of retirement spending

In retirement, people usually spend more money in the first few years, less in the middle years, and more again later on because they need help and healthcare. This curve can’t be summarised in a single “monthly number.”


What’s more, two retirees with the same amount of savings can have very different outcomes depending on how the market behaves. This “sequence-of-returns risk” is one of the most significant problems with fixed-rule planning.

A better way to figure out what you need for retirement

A more accurate and long-lasting way to do things is to:


• Make plans for different times when you’ll spend money
• Make realistic long-term inflation assumptions
• Plan for 35 years in retirement
• Test your retirement plan against market fluctuations, inflation shocks, and the possibility of living a very long life

This is why annual reviews are essential. Going over your plan once a year as your life and situation change is the least you can do to safeguard your retirement!

How do we help you with this process?

We don’t use easy ways out or fixed formulas. Instead, we create flexible, personalised retirement plans that adapt as your life changes. We keep an eye on your plan, monitor market conditions, and make adjustments to projections as needed using modern financial planning tools. This ensures your retirement plan stays on track with your goals, not just at the start but every year after.

The bottom line

Your retirement number isn’t fixed. It’s a number that changes over time based on your health, lifestyle, longevity, and the state of the economy.
The 25× Rule was helpful at one point, but your future deserves more than a quick fix. You should have a plan that works with your life, not the other way around.

Disclaimer – *The information provided herein should not be used or relied on as professional advice. No liability can be accepted for any errors or omissions nor for any loss or damage arising from reliance upon any information herein. Always contact your professional adviser for specific and detailed advice. ©FInDotNews