What Exactly Is Inflation?
Inflation is the rate at which the general level of prices for goods and services rises over time — and, correspondingly, the rate at which the purchasing power of money falls. When inflation is running at 5%, something that cost $100 last year costs $105 today.
A small, steady level of inflation is considered healthy in most economic models. It encourages spending and investment (holding onto cash means watching its value erode) and gives central banks room to manoeuvre during downturns. The problems arise when inflation becomes too high, too unpredictable, or too persistent.
How Is Inflation Measured?
The most widely cited measure is the Consumer Price Index (CPI), which tracks the average change in prices paid by consumers for a defined "basket" of goods and services — everything from bread and petrol to rent and healthcare. The composition of this basket is periodically reviewed to reflect how people actually spend their money.
Other measures include the Producer Price Index (PPI), which tracks prices at the wholesale level and is often a leading indicator of future consumer price changes, and the GDP deflator, a broader measure used by economists.
What Causes Inflation?
Inflation is rarely caused by a single factor. The most common drivers include:
- Demand-pull inflation: When demand for goods and services outstrips supply — often during periods of strong economic growth or government stimulus — prices are bid upward.
- Cost-push inflation: Rising production costs (energy, labour, raw materials) are passed on to consumers through higher prices. Supply chain disruptions are a classic trigger.
- Built-in (wage-price) inflation: When workers expect prices to rise, they demand higher wages. Higher wages increase business costs, which pushes prices higher, creating a self-reinforcing cycle.
- Monetary factors: An excessive increase in the money supply can devalue currency and push prices higher, particularly over the longer term.
Who Is Hit Hardest by High Inflation?
Inflation does not affect all households equally. Those on fixed incomes — pensioners, some benefit recipients — find their purchasing power eroded most acutely when prices rise faster than their income. Lower-income households also feel the squeeze more intensely because a larger proportion of their spending goes on essentials like food and energy, which often see sharper price increases.
Conversely, those who own assets — property, shares, commodities — often see the nominal value of those assets rise alongside inflation, providing a degree of protection.
How Central Banks Respond
The primary tool for controlling inflation is interest rate policy. When inflation runs too high, central banks raise interest rates. This makes borrowing more expensive, which cools consumer spending and business investment, easing pressure on prices. The trade-off is slower economic growth and rising costs for anyone with variable-rate debt.
This is why mortgage holders watch central bank announcements closely. A rate rise translates directly into higher monthly payments for many homeowners.
Practical Steps for Managing Your Finances During High Inflation
- Review your budget. Identify discretionary spending that can be reduced without significant impact on quality of life.
- Overpay debt where possible. In a rising rate environment, reducing variable-rate debt is effectively a guaranteed return equal to your interest rate.
- Ensure savings are working hard. Savings accounts and fixed-term deposits often offer better rates during high-inflation periods. Shop around.
- Consider the long term. Investing in diversified assets has historically provided protection against inflation over multi-year periods, though markets carry short-term risk.
Inflation is ultimately a macroeconomic force that individuals cannot control — but understanding it clearly is the first step toward making better financial decisions in response to it.