Rental income in the UK is subject to Income Tax after allowable expenses. In 2026/27 mortgage interest is no longer deductible — instead you get a 20% tax credit (Section 24). Full guide for individual landlords.
Section 24 replaced mortgage interest deduction with a 20% tax credit in 2020. In 2026 it still hits higher-rate landlords hard — here's exactly how much extra tax you're paying and what to do about it.
