What is inflation?

What does inflation actually mean?

The European Central Bank (ECB) puts it plainly: “Inflation occurs when there is a broad increase in the prices of goods and services, not just of individual items”. The key word is broad. One product getting more expensive — say, coffee after a poor harvest — is not inflation on its own. Inflation is when prices across the economy drift up together.

The effect on you is about purchasing power: how much a unit of money can buy. In the ECB’s words, “inflation reduces the value of the currency over time.” Your $100 note still says $100, but it buys fewer groceries, train tickets or haircuts than it did before.

How is inflation measured in the US?

The most-quoted measure is the Consumer Price Index (CPI), produced by the US Bureau of Labor Statistics (BLS). The BLS defines it as “a measure of the average change over time in the prices paid by consumers for a representative basket of consumer goods and services.”

Think of a very large shopping basket — food, rent, fuel, clothing, medical care, transport and much more — priced again every month. The BLS says the main version, CPI-U, covers “over 90 percent of the U.S. population”, and calls the CPI “the most widely used measure of inflation”. National figures are published monthly.

When the news says “inflation is 3%”, it usually means the CPI is 3% higher than in the same month a year earlier.

What is the latest US inflation figure?

The most recent BLS release we checked (published 11 September 2026, covering August 2026) reported:

The BLS says the energy rise was due “in large part to the index for gasoline rising 27.4 percent.” “Core” inflation strips out food and energy because those prices jump around; it is useful for spotting the underlying trend, but households still pay for food and fuel. The next CPI release is scheduled for 14 October 2026, so check the BLS site for newer numbers.

Why do central banks aim for 2% inflation?

The two best-known central banks do not aim for zero inflation. They aim for low, steady inflation.

• US Federal Reserve. Its policy committee, the Federal Open Market Committee (FOMC), “judges that inflation of 2 percent over the longer run, as measured by the annual change in the price index for personal consumption expenditures, is most consistent with the Federal Reserve's mandate for maximum employment and price stability.” Note the index: the Fed’s target uses the PCE price index, not the CPI.
• European Central Bank. Since its 2021 strategy review, the ECB says “price stability is best maintained by aiming for 2% inflation over the medium term”, measured by the Harmonised Index of Consumer Prices (HICP). It adds: “We consider negative and positive deviations from our 2% inflation target to be equally undesirable.”

The Fed explains that when people can count on stable, low inflation, they make better decisions about saving, borrowing and investing. The main tool central banks use to steer inflation is short-term interest rates.

How does inflation affect your savings?

Inflation quietly shrinks money that sits still. Here is a simple illustrative calculation:

• A basket that cost $100.00 a year ago costs $100 × 1.034 = $103.40 after 3.4% inflation.
• So $100 of cash now buys 100 ÷ 103.40 = 0.967 of that basket — about 3.3% less.
• Even at the 2% target, prices compound: over 10 years they rise by 1.02¹⁰ = 1.219, about +21.9%. $100 then buys roughly what $82.03 buys today (100 ÷ 1.219).

This is why economists talk about real returns — your interest rate minus inflation. The ECB’s rule of thumb is real interest rate = nominal interest rate − inflation. A savings account paying 3% while inflation runs at 3.4% has a real return of about −0.4%: your balance grows, but what it can buy shrinks. US regulators at Investor.gov call this out directly: “Inflation reduces purchasing power, which is a risk for investors receiving a fixed rate of interest.”

Inflation also works against debt that grows faster than your income. Our guide to compound interest shows how the same maths runs both ways.

Is crypto connected to inflation?

You will often hear that Bitcoin is “protection against inflation”. We do not make that claim, because we have not found an official source that supports it. Here is what the sources do say:

• Bitcoin’s supply follows fixed rules. The Federal Reserve Bank of St. Louis notes that no central bank controls Bitcoin’s supply, and the reference software caps it at just under 21 million coins (see What is Bitcoin?). That is a fact about supply, not price.
• Prices are volatile. The UK Financial Conduct Authority (FCA) describes crypto as high risk and speculative and says you should be prepared to lose all your money. EU supervisors say crypto prices “can fall and rise quickly over short periods of time.” A coin whose price can drop sharply in weeks cannot be relied on to keep up with a slow, steady rise in grocery prices.
• Dollar stablecoins share the dollar’s inflation. The Bank for International Settlements (BIS) says stablecoins “promise to always be worth a fixed amount in fiat currency”, and over 99% are dollar-denominated. Even if a coin holds exactly $1.00 for a year while prices rise 3.4%, it buys 1 ÷ 1.034 = 0.967 of what it did — the same loss as a paper dollar (illustrative). See what stablecoins are.

What are the risks of reacting to inflation?

High inflation headlines can push people into rushed decisions. Keep these points in mind:

• Chasing “inflation-beating” returns. Higher potential returns come with higher risk. Investor.gov notes that “All investments involve some degree of risk.” Promises of returns that “always beat inflation” are a classic scam pitch — learn the red flags.
• Leaving your safety net exposed. Money you may need soon is usually better kept in insured savings, even if it earns slightly less than inflation. Read why an emergency fund comes first.
• Confusing measures. Headline CPI, core CPI and the Fed’s PCE target are different numbers. Compare like with like.
• Crypto-specific risk. Crypto adds volatility, platform and scam risk on top of inflation. See our overview of crypto risks.

Blockhorizon is an education site. Nothing here is a recommendation to buy, sell or hold any asset.