SA105: UK Property
Reporting rental income to HMRC.
The SA105 is a supplementary page to the main SA100 form. You use it to declare income from UK property, such as renting out a house or flat, or furnished holiday lettings.
Rent a Room Scheme vs SA105
If you rent out a room in your own home and the income is under £7,500 per year, you can use the Rent a Room Scheme and you do not need to fill out the SA105. If it is over £7,500, or you rent out a separate property, you must file.
Deductions
Common allowable expenses include insurance, letting agent fees, and maintenance. Note: Mortgage capital repayments are NOT allowable expenses. Mortgage interest is restricted to a basic rate tax reduction (20%).