Written question asked by Mike Wood (Conservative) on Wednesday, 24 June 2026, in the House of Commons. It was due for an answer on Monday, 29 June 2026. It was answered by Dan Tomlinson (Labour) on Friday, 3 July 2026 on behalf of the Treasury.

Income Tax: Tax Collection

Question: To ask the Chancellor of the Exchequer, if she will list each third party database that HMRC has access to for the purposes of income tax collection.

Answer

HMRC use third-party data to help simplify tax administration. Specifically in relation to calculating tax due, the key sources of third-party data are:

o Department for Work and Pensions – pension income and benefit information

o Bank and building societies– savings interest information

o Employers – payroll data about payments to employees

In addition, HMRC also make use of third-party data in our compliance activities to ensure customers pay the right amount of income tax. To protect the operational integrity of these activities we do not disclose all of our data sources, but at a high level they include card sales data and other data that provides evidence of undeclared taxable income.

Secondary information

Type: Written question
Reference: 12704
Session: 2026-27
Subjects: Databases Income tax Revenue and Customs Tax collection
Link: View this Written question on www.parliament.uk

Income Tax: Tax Collection

Secondary information

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