For the tax year 6 April 2018 to 5 April 2019,the allowable costs of getting a loan or alternativefinance to buy a residential property that is let,and any interest on those loans and alternativefinance, is restricted to 50% of these costs for each property business. To show the 50% finance costs on the SA107 Add the Trust Page using the + NEW PAGE button Add Income  Select Residential Property Income  Click SAVE