Key term

What it means

Divide a chosen measure of public debt by gross domestic product (GDP), the value of goods and services produced in the country over a period, usually a year. The result is often shown as a percentage. Debt is the amount owed at a particular date; GDP is measured over a period, so the ratio compares their sizes. It can fall if the economy grows faster than debt, even while the cash amount of debt rises. Check which measure of debt a report uses.

Example

If measured public debt is £2 trillion and GDP over the year is £2.5 trillion, the debt to GDP ratio is 80%. The country does not have to repay 80% of its yearly production all at once.

Why it matters

It helps compare debt with the size of the economy rather than judging a large cash amount in isolation.

Also known as

public debt to GDP ratio

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