Real Terms

Real terms is the expression economists use for a value that has been adjusted for changes in the price level, so that it reflects actual purchasing power rather than the number of currency units. A figure "in real terms" or "at constant prices" removes the effect of inflation (or deflation); a figure "in nominal terms" or "at current prices" does not. Real terms are used for wages, incomes, output, interest rates, government spending and investment returns.

The distinction is central to macroeconomics. Growth in gross domestic product (GDP), for example, is reported in real terms because a rise in nominal GDP can come from higher prices alone. Ignoring the difference leads to money illusion, and contracts that protect real values do so through indexation.

Suppose your grandmother earned 50 a week in her first job and you earn 900. Are you eighteen times better off? Not necessarily, because bread, rent and bus fares cost far more today. To compare fairly, you have to ask how many loaves of bread or months of rent each wage could buy.

Converting to real terms does exactly that. It turns every amount into "today's money" or "money from a chosen base year", so that comparisons across time measure what people could actually afford rather than the size of the numbers. When a news report says wages fell "in real terms", it means pay rose more slowly than prices, so the typical worker can buy less than before.

A nominal amount is turned into real terms by dividing by a price index, rebased so that the reference year equals 100:

• The nominal value is the amount in the money of its own year.
• The price index is a measure such as the Consumer Price Index (CPI) for household items or the GDP deflator for the whole economy, set to 100 in the base year.

Worked example: a salary of 60,000 in 2020, when the index was 100, and 66,000 in 2025, when the index is 115. In 2020 money, the 2025 salary is $66{,}000 \div 115 \times 100 \approx 57{,}391$. Nominal pay rose 10%, but real pay fell by about 4.3%.

For growth rates, a quick approximation is that real growth equals nominal growth minus inflation. For interest rates this relationship is the Fisher equation, explained in the entry on the nominal interest rate:

Here $r$ is the real rate, $i$ the nominal rate and $\pi$ the inflation rate. A deposit paying 5% when inflation is 3% earns a real return of about 2% (more precisely $1.05 \div 1.03 - 1 \approx 1.94\%$).

• National accounts. Statistical agencies such as the US Bureau of Economic Analysis, the UK Office for National Statistics and Eurostat publish GDP "chained volume" or constant-price series, which strip out price changes so that growth reflects more goods and services produced.
• Wages and living standards. Real wages and real household income show whether pay keeps up with living costs; the UK, for instance, saw real average pay fall in 2022 as inflation outpaced wage growth.
• Interest rates and monetary policy. Central banks judge whether policy is tight or loose by the real policy rate compared with the neutral interest rate (r-star).
• Investment returns. A real rate of return shows how much an investor's purchasing power grew; inflation-linked bonds quote real yields directly.
• Public finances. Budgets are compared in real terms to see whether spending on health or defence has truly grown, and the burden of national debt is often expressed relative to nominal GDP, which inflation helps reduce.
• Cross-country comparisons. Converting at purchasing power parity (PPP) adjusts for price-level differences between countries, a related idea applied across space instead of time.

A real figure is only as good as the price index used. Different indexes give different answers: the CPI tracks a household basket, the GDP deflator covers all domestic output, and individual households face their own mix of prices. Indexes may also miss quality improvements and new products, which is why statisticians use hedonic adjustment. Base-year choice matters for long comparisons, and for very long periods, such as comparing wages across a century, real conversions can only be approximate because the goods people buy change completely. Finally, during hyperinflation official indexes may lag reality, so real values computed from them can be misleading.

Real values also connect to purchasing power more broadly: the real value of a fixed sum of cash or a fixed-rate bond falls as prices rise, which is why lenders demand compensation for expected inflation and why unexpected inflation transfers wealth from creditors to debtors.

• U.S. Bureau of Economic Analysis: Gross Domestic Product
• Office for National Statistics: Inflation and price indices