Inflation: Causes & Effects

A typical 4-mark question rewards distinct effects on different groups. Inflation is redistributive: it harms some people and helps others.

Savers (usually lose)

Savers earn a nominal interest rate on their deposits. The real return is:

Real interest rate ≈ nominal interest rate − inflation rate

If inflation is 5% and a savings account pays 2%, the real interest rate is −3%. The saver's money is losing purchasing power even while the bank balance grows in pounds. Savers are made worse off whenever inflation exceeds the rate on their accounts.

Borrowers (usually gain)

Borrowers repay loans in money that is worth less than when they took them out. If a household borrows £100,000 at a fixed rate to buy a house, and inflation runs at 5% per year for several years, the real value of the debt falls even though the nominal amount is unchanged. Mortgage holders and other long-term borrowers tend to benefit from inflation, especially when their loans were taken out at fixed nominal rates.

Workers on fixed wages or pensions (lose)

A worker on a wage that does not rise with prices sees their real wage fall: the same paycheque buys fewer goods. Pensioners on fixed nominal pensions are particularly vulnerable: many state pensions are now index-linked (rising with inflation) for exactly this reason. Private-sector workers in strong unions tend to negotiate inflation-linked pay rises to protect their real wages.

Exporters (lose competitiveness)

If a country's inflation rate is higher than its trading partners', the prices of its exports rise relative to the world average. Foreign buyers switch to cheaper alternatives, and the country's current account (topic 12) deteriorates. Exporters lose market share unless they can absorb the cost rises or cut their margins.

Firms (mixed)

• Predictable, low inflation is broadly fine for firms: they can plan, invest and price ahead.
• High, volatile inflation is harmful: firms cannot easily predict input costs or set selling prices; investment falls because the future is uncertain.
• Firms with pricing power (inelastic demand) can pass cost rises on easily; firms in highly competitive markets are squeezed.

The economy as a whole

• Investment falls when inflation is high and unpredictable, because firms cannot assess future returns reliably.
• Menu costs rise: shops, restaurants and other firms spend more time and money repricing.
• International confidence falls, which can push the currency down and feed even more imported inflation.

Hyperinflation is qualitatively different. When prices are doubling every few weeks, money loses its function as a store of value and a unit of account. People barter, switch to foreign currencies, or stop accepting the local money altogether. Economic activity collapses.