Question to the Department for Work and Pensions:

To ask the Secretary of State for Work and Pensions, how many people have been affected by underpayment errors in state pensions in each of the last 10 years.

The information requested is not held by the Department.

The overall rate of State Pension underpayment due to official error remains low as a proportion of expenditure (0.5% in 2022/2023).

Information on the broad categories where State Pension underpayments are most often identified was set out in the DWP Annual Report and Accounts 2022-23.

DWP annual report and accounts 2022 to 2023 - GOV.UK (www.gov.uk)

DWP is taking action to rectify historic errors in the State Pensions caseload. Our priority is to ensure that everyone receives their correct State Pension entitlement.