See how inflation changes what an amount is worth over time.
Per year
What $100.00 of goods will cost
$180.61
After 20 years at 3%
What $100.00 will be worth
$55.37
In today's purchasing power
What this assumes
A decade
£100 at 3% for 10 years
100A working lifetime
Forty years of erosion
40High inflation
A more severe rate
8A price today, or a sum of money you are holding.
Central bank targets are often around 2%, but recent years have been considerably higher.
The future cost of the same goods, and what today’s money would then be worth.
Rising prices and falling purchasing power are the same phenomenon, and seeing both figures makes the effect on savings concrete.
The erosion is slow at first and then accelerates, which a single endpoint figure conceals.
A constant rate is a simplification. The tool states it rather than implying inflation is predictable.
Work out what something costing a given amount today would cost after years of inflation, and what today’s money would be worth in future purchasing power. Both directions are shown because they answer different questions: one is about future prices, the other about the eroding value of cash sitting still. The calculation assumes a constant rate, which real inflation never is — it is a way of understanding the mechanism, not predicting prices.
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