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Self Assessment Tax Guide for Landlords

Complete guide to Self Assessment tax returns for landlords, including allowable expenses, mortgage interest relief, and filing deadlines.

Updated: 1 March 2026

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Document Overview

Self Assessment Tax Guide for Landlords

All landlords must declare rental income to HMRC via Self Assessment. This guide explains what you need to know.

Allowable Expenses:

  • Letting agent fees
  • Property repairs and maintenance
  • Insurance premiums
  • Accountancy fees
  • Ground rent and service charges
  • Utility bills (if paid by landlord)

Mortgage Interest Relief:

  • Basic rate tax credit (20%) on mortgage interest
  • No longer deductible as an expense
  • Applies to residential properties only

Key Deadlines:

  • Register for Self Assessment: 5 October
  • Paper return: 31 October
  • Online return: 31 January
  • Tax payment: 31 January and 31 July
Related Topics
tax
self-assessment
hmrc
expenses
rental-income

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Guidance only. Landlord Handbook provides practical information to help landlords understand their responsibilities. It is not legal or financial advice. Always check the latest GOV.UK guidance and seek professional advice where appropriate.

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