What Is Inflation?
Inflation is the rate at which the general level of prices rises over time. When inflation is positive, each unit of money buys a little less than it did before. A basket of groceries that cost $100 last year might cost $104 this year at 4% inflation.
Inflation is measured by tracking the prices of a representative "basket" of goods and services that households typically buy. When that basket gets more expensive, inflation is rising. When it stabilises or falls, inflation is low or negative (deflation).
Why Inflation Happens
Inflation has several causes, but they generally come down to two forces:
Too much money chasing too few goods. When the money supply grows faster than the economy's output, more money competes for the same quantity of goods — pushing prices up. This can happen when central banks print money or when governments run large deficits financed by borrowing.
Rising costs of production. When the cost of inputs like energy, labour, or raw materials rises, producers pass those costs on through higher prices. This is sometimes called cost-push inflation.
In practice, inflation usually reflects a combination of factors. Central banks manage interest rates specifically to keep inflation within a target range — typically around 2% per year in most developed economies.
Inflation and Purchasing Power
Purchasing power is how much your money can actually buy. Inflation erodes it. If prices rise 3% per year and your savings earn nothing, the real value of your savings falls by roughly 3% per year.
Over long periods, this compounds significantly. At 3% inflation, prices double roughly every 24 years. Money sitting in a low-interest account quietly loses buying power decade by decade. This is why keeping large amounts of cash idle for long periods carries its own risk — not the dramatic risk of a stock market crash, but the slow, invisible risk of inflation.
How to Protect Yourself
Inflation is not a problem you eliminate — it's one you account for. A few practical principles:
- Invest, don't just save. Assets like equities and real estate have historically grown faster than inflation over the long run, preserving and growing purchasing power.
- Understand "real" vs "nominal" returns. A 5% return when inflation is 4% is only a 1% real return. Always consider returns after inflation.
- Debt can be a hedge. Fixed-rate debt becomes cheaper in real terms as inflation rises — borrowers repay with money that's worth less than when they borrowed it.
Inflation in Everyday Life
Inflation affects decisions you make constantly: whether to lock in a fixed mortgage rate, how aggressively to invest, how to negotiate a salary, and how to plan for retirement. Understanding it means you're accounting for the real value of money over time, not just the number on the balance sheet.