Gross rent received for the year, across all your residential property.
Everything you legitimately claim except mortgage interest: agent's fees, repairs, insurance, ground rent, service charges, accountancy.
Interest only, not capital repayments. Include arrangement fees and any finance costs carried forward from an earlier year.
Employment, pension, self-employment or anything else taxable. Leave at zero if the property is your only income.
Illustrative figures on 2026/27 rates and simplified assumptions. This is information, not advice, and it is no substitute for a proper calculation on your own numbers. Ask us to work through your own figures.