Question to the HM Treasury:

To ask the Chancellor of the Exchequer, how many (a) major IT failures and (b) security breaches there have been at HMRC in each quarter since Q1 of 2022.

(a) HMRC do not publish major IT failures in the public domain. Previously, HMRC have made announcements using online platforms such as GOV.UK and Twitter to update customers on services that have been impacted by an outage or an IT failure. Customers can also find out about downtime and technical issues with HMRC services via the GOV.UK platform - HMRC Service and Availability and Issues. Please see link here: https://www.gov.uk/government/collections/hm-revenue-and-customs-service-availability-and-issues

(b) Information related to security breaches are published and can be found in the HMRC Annual Report and Accounts 2021/2022 and 2022/2023. Links to both reports can be found below:

• 2021/2022 report - https://www.gov.uk/government/publications/hmrc-annual-report-and-accounts-2021-to-2022/hmrc-annual-report-and-accounts-2021-to-2022--2
• 2022/2023 report - https://www.gov.uk/government/publications/hmrc-annual-report-and-accounts-2022-to-2023?&utm_source=intranet&utm_medium=internal&utm_campaign=ara