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Landlords & CIS

Rental income tax: a Self Assessment guide for landlords

If you rent out property in the UK, the profit is added to your other income and taxed at your normal rates. This guide covers when you need to file, what costs you can deduct, how mortgage interest relief works, and how to report it.

TaxGo Editorial TeamLast reviewed · Tax year 2025/263 min read
Contents
  1. 01Do landlords need to file?
  2. 02How rental profit is taxed
  3. 03Costs you can deduct
  4. 04Mortgage interest: Section 24
  5. 05Property allowance vs actual costs
  6. 06Furnished holiday lettings
  7. 07Reporting it
  8. 08Jointly owned property

Key takeaways

  • Rental profit is taxed at your income tax rates (20%, 40% or 45%).
  • Rental income under £1,000 is covered by the property allowance.
  • Mortgage interest isn't deducted — instead you get a 20% tax credit (Section 24).
  • Furnished holiday lettings rules were abolished from April 2025.

Do landlords need to file?

Gross rental income in the tax yearWhat to do
£1,000 or lessCovered by the property allowance — usually nothing to do
£1,000 to £2,500Contact HMRC — it may be collected through your tax code
Over £2,500 (or £10,000+ before expenses)Register for Self Assessment and file a return

Renting a furnished room in your own home? The separate Rent a Room scheme lets you earn up to £7,500 a year tax-free.

How rental profit is taxed

Your rental profit — rent received minus allowable costs — is added to your other income for the year and taxed at your usual rates. That can push you into a higher band, so it's worth estimating early with the tax calculator.

Useful tool

Add your rental profit to your other income and see the estimated bill.

Estimate your tax

Costs you can deduct

  • Letting agent and management fees.
  • Repairs and maintenance (not improvements).
  • Insurance (buildings, contents, landlord policies).
  • Ground rent, service charges and council tax/bills you pay.
  • Accountancy and legal fees for renewing leases (not buying the property).
  • Replacing domestic items such as furniture and appliances (like-for-like).
  • Travel to and from the property for letting business.

Our blog post on expenses landlords forget to claim goes into more detail.

Mortgage interest: Section 24

For residential property held personally, you can't deduct mortgage interest from your rental income. Instead, you get a tax credit equal to 20% of your finance costs (mortgage interest and some fees).

Basic-rate landlordHigher-rate landlord
Rent minus other costs£10,000£10,000
Mortgage interest£4,000£4,000
Tax on £10,000£2,000 (20%)£4,000 (40%)
Less 20% credit on £4,000−£800−£800
Tax due£1,200£3,200

That's why higher-rate landlords pay more than they did before Section 24. Simplified example only — the credit is capped in some situations.

Property allowance vs actual costs

If your costs are low, you can deduct the £1,000 property allowance instead of your actual expenses. You can't do both, and you can't use it alongside Rent a Room relief on the same income.

Furnished holiday lettings

The special furnished holiday lettings (FHL) tax regime was abolished from 6 April 2025. Holiday lets are now taxed like other property income, including the Section 24 rules.

Reporting it

UK rental income goes on the SA105 property pages of your return. Have your letting agent's annual statement, mortgage interest statement and receipts ready. Landlords with property and self-employment income over the thresholds will also need Making Tax Digital from April 2026.

With TaxGo, upload your letting statement and mortgage statement and we'll build your property section, apply the 20% finance cost credit and show every figure's source. More on our landlords page.

Jointly owned property

If you own a rental property with someone else, each owner reports their share of the profit on their own tax return. Married couples and civil partners who own property jointly are usually taxed 50:50 by default, even if the actual ownership split is different.

If you own the property in unequal shares and want to be taxed on your actual shares, you can make a joint declaration to HMRC using Form 17, backed up by evidence of the beneficial ownership split. This can save tax where one partner pays a lower rate.

For unmarried co-owners, profits are normally split according to your ownership shares, or another split you've agreed.

Records to keep

Keep your tenancy agreements, the letting agent's annual statement, mortgage interest statements, invoices for repairs and any insurance documents for at least five years after the 31 January filing deadline.

Questions people ask

Is rental income taxed separately from my salary?

No. Your rental profit is added to your other income and taxed at your normal rates.

Can I deduct my mortgage payments?

Not the capital repayments. For residential lets, mortgage interest gets a 20% tax credit instead of being deducted (Section 24).

Do I pay National Insurance on rental income?

Not usually, unless running the property is a business in its own right.

Get your 2025/26 return ready without the forms.

Upload your documents. TaxGo reads them, asks only what's missing and calculates your tax. £79 per return, paid when it's ready.

This guide is general information based on HMRC guidance for the 2025/26 tax year, not personal tax advice. Rules and rates change — check GOV.UK or speak to a qualified adviser about your circumstances.

Your tax return isn't going to do itself.

Actually, TaxGo gets pretty close.