What interest rate do you need to beat inflation?
To beat inflation, your investment must earn more than prices rise, after tax. If inflation is 2.8%, you need a rate above 2.8% net to gain purchasing power. In 2026, a 1.5% Livret A does not beat 2.8% inflation: its real return is about -1.26%.
Good to know :
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Explanation
The displayed rate of a savings product is not enough to know whether your money is truly growing. What matters is the real rate: the return after inflation is removed.
A product can therefore be positive on paper and negative in real terms. For example, a 1.5% rate may look useful if you only look at interest earned. But if prices rise by 2.8%, each euro loses more purchasing power than the savings account generates.
You also need to distinguish between gross and net rates. The Livret A, LDDS and LEP are exempt from income tax and social contributions: their rate is already net. By contrast, a taxable bank savings account must be compared with inflation after tax, including the 30% flat tax when it applies.
Updated on June 2, 2026: savings account rates, inflation and tax rules may change over time. This answer provides an educational calculation method and is not personalized financial advice.
Formula / method
To preserve purchasing power:
net rate ≈ inflation
To beat inflation:
net rate > inflation
With tax:
net rate = gross rate × (1 - tax rate)
Concrete example
With inflation at 2.8%:
- a savings product paying 1.5% net does not beat inflation;
- its real return is about -1.26%;
- to beat inflation, you need more than 2.8% net.
If a bank savings account is taxed at 30%, it needs to pay about 4% gross to deliver 2.8% net after tax. Below that, the product may earn interest but still fail to fully preserve purchasing power.
Common mistake
The trap is comparing a gross rate with inflation. That is misleading. Inflation should be compared with the net rate actually kept after taxes and social contributions. Otherwise, a product can look profitable while losing purchasing power.
Sources & methodology
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