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Capital needed for an inflation-proof pension

📖 The story

Mrs. Esposito wants to draw a pension in 30 years that matches today's purchasing power of $1,800. At 3 % inflation the required nominal amount rises; based on that she calculates her capital need for a 22-year pension at 4 %.

ℹ  Preliminary step: $1,800 today is compounded at 3 % over 30 years to the pension amount used here; from that the present value of the 22-year pension phase.

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What you learn

An inflation-proof pension costs many times the nominally equal one. Without an inflation adjustment you systematically plan too tightly and end up in old age with too little.

In short: An inflation-proof pension costs many times the nominally equal one – without an inflation adjustment you systematically plan too tightly.
Formula
K0 = R · (1 − q^(−n))/(q − 1)
With the example numbers
K₀ = 4.369,07 € · (1 − q−n)/(q−1),  n = 264 = 771.447,63 €
How to read the formula

The present value reverses compound interest: each future pension payment is discounted because a dollar in 20 years is worth less today. The sum of all these discounted payments is the capital that must suffice at the start of retirement. Takeaway: behind a small monthly pension sits a large pool of capital.

More values
Inflationsangepasste rente 4,369.07

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