What Is Inflation? How It Works and How It Affects You
What is inflation? Learn how rising prices are measured, what causes them, how central banks respond, and simple ways to protect your savings and budget.
This guide is general information only, not professional financial, legal or technical advice. Menus and rules can vary by device and country.
Inflation is the rate at which prices for goods and services rise over time, usually measured over one year. When inflation is 3%, something that cost 100 a year ago costs about 103 today, so each unit of your money buys a little less.
A small, steady amount of inflation is normal in a healthy economy. Problems start when prices rise fast, jump around unpredictably, or rise faster than your income.
Quick answer
- Inflation means prices across the economy are rising, so money loses buying power.
- It is usually measured with a consumer price index (CPI), which tracks the cost of a "basket" of everyday goods and services.
- Many central banks aim for about 2% inflation per year.
- Central banks mainly fight high inflation by raising interest rates.
- Inflation hurts cash savings and fixed incomes, and it can help people with fixed-rate debt.
- You can protect yourself by budgeting, keeping savings earning interest, and planning for rising costs.
This article is general information, not personal financial advice.
How Inflation Is Measured
Statistics agencies track the prices of a typical "basket" of things households buy. In the UK, for example, the basket covers around 700 items, from bread and bus fares to cars and holidays. The total cost of that basket is turned into a number called the consumer price index (CPI).
The inflation rate is simply the percentage change in that index, usually compared with the same month a year earlier. Here is how to work it out:
- Take the index value now (for example, 110).
- Take the index value one year ago (for example, 100).
- Subtract the old value from the new one: 110 − 100 = 10.
- Divide by the old value and multiply by 100: 10 ÷ 100 × 100 = 10% inflation.
The basket is updated from time to time so it reflects what people actually buy, such as adding new products and dropping ones people no longer use.
Headline vs. core inflation
"Headline" inflation includes everything in the basket. "Core" inflation removes items whose prices swing a lot, such as food and energy, and sometimes prices set by governments. Core inflation helps experts see the underlying trend without the noise.
Different countries use different indexes. In the US, for example, the Federal Reserve's 2% goal is measured with a related index called the PCE price index rather than the CPI.
What Causes Inflation?
Economists usually group the causes into a few types.
| Cause | What happens | Simple example |
|---|---|---|
| Demand-pull | People and businesses want to buy more than the economy can produce | Strong spending after a boom pushes prices up |
| Cost-push | It becomes more expensive to make or deliver things | Oil prices rise, so transport and goods cost more |
| Expectations | People expect prices to rise, so wages and prices are set higher in advance | Workers ask for bigger raises, businesses raise prices to match |
| Too much money | The money supply grows much faster than the economy | Very high inflation over long periods usually has this cause |
Often several of these happen at once. A supply shock can raise costs, and if people then expect prices to keep climbing, inflation can last longer.
Why Central Banks Target About 2%
Many central banks, including the US Federal Reserve and the Bank of England, aim for inflation of about 2% per year. A low, stable rate gives people confidence to plan their saving, borrowing and spending.
Zero is not the goal because falling prices (deflation) can be harmful too. When prices fall, people may delay purchases, business profits can drop, and that can lead to wage cuts and job losses.
How interest rates bring inflation down
Central banks set a key interest rate that influences the rates on loans, mortgages and savings accounts.
- When inflation is too high, the central bank raises its rate.
- Borrowing becomes more expensive and saving becomes more rewarding.
- People and businesses spend less.
- Lower demand slows down price rises.
When inflation is too low, the process runs in reverse: lower rates encourage borrowing and spending.
How Inflation Affects You
Inflation does not affect everyone the same way. It depends on whether you mainly save, borrow or earn a fixed income.
| You are... | Effect of higher inflation |
|---|---|
| Holding cash or low-interest savings | Your money buys less over time |
| Earning a wage that does not keep up | Your real (after-inflation) income falls |
| Living on a fixed pension or payment | Your buying power shrinks each year |
| Paying a fixed-rate loan | The real cost of your debt falls, since you repay with "cheaper" money |
| Paying a variable-rate loan | Your payments may rise if interest rates go up |
| Lending money at a fixed rate | You lose out if inflation is higher than expected |
The math of lost buying power
Here is what steady inflation does to 100 units of cash kept under the mattress for 10 years:
- At 2% inflation, it buys what about 82 would buy today.
- At 3% inflation, it buys what about 74 would buy today.
The same idea works in reverse. At 3% inflation, something that costs 100 today would cost about 134 in 10 years. This is the flip side of compound interest: small yearly increases add up.
Real vs. nominal interest
The "nominal" rate is the number your bank shows you. The "real" rate is roughly the nominal rate minus inflation. If your savings earn 2% while inflation is 3%, your real return is about −1%. Your balance grows, but what it can buy shrinks.
How to Protect Yourself From Inflation
You cannot control inflation, but you can reduce its impact on your household.
- Review your budget regularly. Prices change, so update your spending plan every few months. Our guide on how to make a budget walks you through it.
- Compare savings rates. Keep your emergency savings in a safe account, but shop around so it earns a competitive rate instead of sitting at zero.
- Pay down high-interest debt. Credit card rates are usually far above inflation, and variable rates may rise when central banks raise rates.
- Think long term for long-term money. Money you won't need for many years may need to grow faster than inflation. Learn the basics and the risks first in our investing for beginners guide.
- Plan for rising costs. When setting goals, such as saving for a car or retirement, assume prices will be higher by the time you need the money.
- Ask about pay. If your wages haven't risen for a long time, research typical pay for your role and consider raising it with your employer.
Common Mistakes and Misunderstandings
- Thinking "lower inflation" means lower prices. It usually means prices are rising more slowly, not falling.
- Comparing your own costs to the official rate. The index reflects an average basket. If you spend a lot on rent, food or fuel, your personal inflation rate may be higher or lower.
- Keeping all long-term savings in cash. Cash is safe for emergencies, but over many years inflation slowly eats into it.
- Ignoring variable-rate debt. When rates rise to fight inflation, variable loan and card payments can climb quickly.
- Falling for "inflation-proof" pitches. Be wary of anyone promising guaranteed high returns as protection. Only scammers guarantee profits; see how to spot online scams.
Frequently Asked Questions
Is inflation good or bad?
Low, stable inflation of around 2% is generally considered healthy. It keeps the economy moving and avoids the risks of deflation. High or unpredictable inflation is harmful because it erodes savings and makes planning difficult.
What is the difference between inflation and deflation?
Inflation means the general price level is rising. Deflation means it is falling. Deflation sounds nice, but it can lead people to delay spending, which can hurt businesses, wages and jobs.
What is hyperinflation?
Hyperinflation is extremely fast inflation, often described as 1,000% or more per year. Money loses value so quickly that people struggle to buy basics. It is rare and usually linked to serious economic or political problems.
Who benefits from inflation?
People with fixed-rate debt can benefit, because they repay loans with money that is worth less. Savers with cash earning less than inflation, and people on fixed incomes, usually lose out.
Why do central banks raise interest rates when inflation is high?
Higher rates make borrowing more expensive and saving more attractive. That cools spending across the economy, which reduces pressure on prices over time.