Tag: data matching

How HMRC Knows You’re Renting Out Your Property: The Data Sources That Reveal Undeclared Income (2025)

Dora Ngoma

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December 16, 2025

HMRC Compliance, Property Tax

A clear guide explaining how HMRC detect undeclared rental income in 2025. Covers letting agent data, Airbnb reporting, council licensing, mortgage checks, overseas data sharing, online adverts and HMRC red flags.