Can I Claim Tax Relief on Mortgage Interest UK? Those that own a property that is let out are affected by changes to Tax Relief on Mortgage Interest. These changes will take effect from 6 April 2017.

They will be phased in over four years, with the final phasing-in year being the 2019/20 tax year. The new rules will affect at least one in five landlords. Until recently, one of the best ways to reduce your tax bill was by claiming tax relief on mortgage interest payments. However, this is no longer the case.