What it means

Sort a group from lowest income to highest and split it into ten equal parts. Each part is an income decile: the first is the lowest-income tenth, the tenth the highest-income tenth. In many UK reports, people are ranked using the income of their household, adjusted for its size. Check whether a chart groups people or households and which income measure it uses.

Example

With 100 households, the ten with the lowest incomes are in the first decile and the ten with the highest are in the tenth. The figures at the edges of those groups are income cut-offs, not the amount everyone in the group receives.

Why it matters

Deciles show how an income change or a policy affects different parts of the population, rather than only the overall average.

Also known as

income tenth

Related terms

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