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Why Inflation Is the Biggest Threat to Your Retirement Income
Inflation quietly erodes more than two-thirds of your money’s buying power over 20 years. See what R50 000 really becomes — and why the gap between an 8% and a 12% return decides the kind of retirement income you can actually draw.
AS Brokers insight
Why inflation is the biggest threat to your retirement income
Inflation is the quiet force that decides whether your savings still buy a full trolley in twenty years - or only half of one. Before we look at investment returns, you need to see exactly what inflation does to a rand left standing still.
The silent erosion most people ignore
When South Africans plan for retirement, the focus usually lands on how much capital they have saved. But the number that really matters is what that capital can buy in fifteen, twenty, or thirty years from now.
If your money is not earning more than the inflation rate, you are not standing still - you are quietly going backwards every single year. The Retirement Income Problem usually begins here, long before retirement actually starts.
Use the calculator before you read the rest
The numbers below this paragraph are not theory. They are what happens when you take a real rand amount today and roll it forward at South Africa's typical inflation range. Try R50 000 over 20 years at 6%. The result will reset how you think about "safe" returns.
Reading the numbers
What R50 000 actually tells you
When you run R50 000 at 6% inflation over 20 years, the calculator shows three things you cannot afford to ignore:
- Future cost of R160 357 - that is what R50 000 worth of expenses today will cost you in 20 years.
- Future buying power of R15 590 - that is what the same R50 000 will be worth if it sits still and earns nothing.
- 68.8% of purchasing power lost - more than two-thirds of your money's value, simply gone.
This is why "keeping your money safe" in something that earns less than inflation is one of the most expensive decisions a retiree can make.
"If your investment returns are lower than inflation, you are not earning - you are paying for the privilege of holding rands."
The 8% versus 12% question
A four-percentage-point gap sounds small in a brochure. Over a retirement horizon it is the difference between a comfortable income and a constrained one. Let's take the same R50 000 starting amount and project it forward 20 years.
Scenario A
R50 000 at 8% per year
After 20 years your capital reaches roughly R233 000.
After adjusting for 6% inflation, that is only about R72 700 in today's buying power. A real gain - but a modest one.
Scenario B
R50 000 at 12% per year
After 20 years your capital reaches roughly R482 000.
After the same inflation adjustment, that is about R150 000 in today's buying power - more than double Scenario A.
The lesson is not that 12% is "better than" 8%. The lesson is that small gaps in return, compounded across decades, do not stay small. This is the maths that decides whether you draw an income with confidence or with constant compromise.
Why this matters at AS Brokers
Returns designed to stay ahead of inflation
Our clients are typically looking at the retirement income side of the picture, not speculative growth. That is why we focus on unlisted share products structured around a fixed double-digit return with an additional inflation-linked component built in.
The objective is straightforward: a Self-Funding Retirement where your income meaningfully outpaces inflation rather than slowly losing the race. Whether that fits your circumstances depends on your full picture - that is exactly what a review is for.
Watch: income now versus income in the future
In the short video below, we walk through how your monthly income today should compare to what you will actually need in fifteen or twenty years - and what kind of investment outcome is required to bridge that gap.
Common questions
What clients usually ask
Is 6% inflation a realistic number to plan around?
South African headline inflation typically moves between roughly 5% and 7%. Some categories that retirees feel most - medical aid, electricity, food - have often run higher. Planning at 6% is a sensible middle-ground assumption, not a worst case.
Why is the difference between 8% and 12% so large over time?
Because both returns compound. An extra 4% per year does not just add - it multiplies on a bigger base each year. Over two decades this turns into a gap of roughly double the capital, in today's buying power.
What if my investments do not consistently beat inflation?
Then the inflation calculator above is showing you exactly what happens - your capital still has rands attached to it, but those rands buy less every year. This is the most common cause of retirees outliving their savings.
How do I know which return I am actually getting?
Most investors cannot answer this with confidence - because fees, tax treatment, and product structure all change the real number. A structured review with an AS Brokers adviser will show you your true after-cost, after-inflation return.
A simple checklist before you book a review
- Run the inflation calculator using your real monthly expense figure, not just R50 000.
- Identify the actual return your current investments deliver after fees.
- Compare that return against your expected inflation rate - not against zero.
- Decide whether your strategy is genuinely solving The Retirement Income Problem, or just delaying it.
- Speak to an AS Brokers adviser before making any structural changes to your portfolio.
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Two private groups, one focused on long-term health and one on solving the retirement income problem with people facing the same questions you are.
Note: Market values can rise or fall, and past performance is not a guarantee of future outcomes.