His Majesty's Revenue and Customs (HMRC) has seized more than £100M in unpaid tax from landlords who failed to declare rental income, as its data-driven crackdown on tax evasion gains momentum.
In the 2025-26 tax year, thousands of property owners came forward and voluntarily disclosed previously undeclared earnings after receiving warning letters from the tax authority. A total of 11,511 landlords made voluntary disclosures, the highest figure since 2018-19. Each landlord paid an average of £9,063 in extra tax, helping HMRC recover £104.3M overall.
