Retirement planning

So how much money
do I actually need for retirement?

Laimis Kisielius 8 min read Personal finance

There are two types of people. Some say: “I should put something aside for retirement.” Others have already worked out a specific number. Guess which ones sleep better.

Most people think about retirement as an abstract idea — “someday, when I am old, it will sort itself out”. But there is one simple question that changes everything: how much money do I actually need in retirement?

Retirement is not a mystery, not a “sometime later”, and certainly not a favour from the state. It is mathematics. And that mathematics has a very specific answer.

The 4% rule

One rule. One number.

There is the so-called The 4% rule. It says: if you withdraw about 4% from your investments each year, the money should last roughly 30 years or more. In other words, you live not off the capital you have built, but off the return it generates. The capital keeps working; you live.

“You live not off the capital you have built, but off the return it generates. The capital works; you live.”

The whole logic of retirement can be reduced to one formula:

Retirement capital
Annual expenses ÷ 0.04
Or, more simply: monthly expenses × 300

And suddenly “sometime in retirement” becomes a very specific number. But there is an important nuance — this formula shows today’s value of money. And money will not become more valuable over the next 25 years; it will become less valuable, because inflation constantly eats away at its purchasing power.

Scenarios

How much do I actually need?

Applying 2.5% annual inflation (the long-term euro area average, compounded over 25 years), the numbers look like this:

Expense scenarios
Monthly expenses
Target today
In 25 years (2.5% inflation)
€1,000
per month
€300,000
~€555,000
€2,000
per month
€600,000
~€1,100,000
€2,500
per month
€750,000
~€1,400,000

And this is usually the moment where people stop. Because the number becomes very real. And often considerably larger than expected.

Example

A real person. A real plan.

A real example
Tomas, 38 — spends about €2,000 a month
€1.1mRetirement target
27 yrsYears until 65
~€964Required monthly contribution*

If Tomas starts investing now, he will need about ~€964 a month at an 8% average annual return. But if he starts only five years later, he will need to invest about ~€1,535 a month — almost 1.6 times more.

* Calculated at an 8% annual pre-tax return, excluding the state pension. This is where time becomes the most expensive asset.

But there is an important “but” that many people forget. This number is not your whole retirement. It is only the part investments will have to cover. If you receive a state pension, rental income or other steady inflows, they reduce the capital you need.

Risk

Why 4% is not a guarantee

This is the most important part, and one that most finance blogs leave out. The 4% rule is not a guarantee. It is based on historical data, mostly from the US market, and assumes the future will resemble the past.

Sequence risk — the quietest threat to a retirement

The biggest risk is not that the market will fall, but when it falls. If you retire and the first years are poor while you keep withdrawing, the portfolio can start shrinking faster than expected. This is called sequence risk.

Someone who understands this behaves differently:

In closing

The biggest mistake is thinking retirement is something distant. It is not. It is a number. And if you do not know it, you are simply driving without a map.

Work out your number now

How much do you spend a month? Enter the number and see the price of your financial freedom.

My monthly expenses
€ / month
You need to build capital of
€450,000
In 25 years with 2.5% inflation: ~€832,000

There is only one question: are you moving towards your number — or just hoping that “somehow it will work out”?

NEXT STEP

You know your number.
Now you need a plan.

Retirement capital does not build itself — it needs a strategy. I will explain how to reach your target in concrete steps, with no commissions and no product selling.

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