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How much tax do I pay on rental income?

Renting out property should grow your wealth, not your tax bill. This 2025 guide distils the latest HMRC rules into plain English that covers what counts as rental income, the expenses you can still claim, and the bite of the finance cost restriction. A real-world Kensington two-bedroom flat shows the maths step by step, while the filing timeline and checklist keep you on track. Read on to stay compliant and keep more of every pound you earn.
  • TheHub@Druce
  • 15 May 2025

How much tax do I pay on rental income?

A 2025 guide for UK landlords with example from Kensington flat

1. What counts as rental income?

Your taxable rental income includes:

  • Monthly rent paid by tenants
  • Cleaning, utility, or maintenance fees paid by tenants
  • Any non-refundable deposits
  • Insurance or service charges recovered from tenants

 Refundable deposits (held in TDS) are not taxed unless retained at tenancy end.

2. What expenses can I deduct?

To reduce your tax bill, you can deduct:

Allowable expensesExamples
Letting agent & property managementDruce fees, marketing, referencing
Maintenance & repairsPlumbing, painting (not improvements)
Services providedCleaning, gardening (for tenants)
InsuranceLandlord building and contents
Council tax & utility billsIf paid by you, not the tenant
Ground rent & service chargesLeasehold flats
Replacement of domestic itemsFurniture/appliances – see note below

Note: You can’t deduct mortgage capital repayments, but you can claim mortgage interest relief (20%) under the finance cost restriction rule.

3. How to calculate tax on rental income

Step-by-step formula:

  1. Rental income (annual)
  2. – Allowable expenses
  3. = Taxable rental profit
  4. Apply income tax rates based on your total annual income:
BandIncome range (2025/26)Tax rate
Personal allowance£0 – £12,5700%
Basic rate£12,571 – £50,27020%
Higher rate£50,271 – £125,14040%
Additional rateOver £125,14045%

4. Example: 2-bedroom flat in Kensington

ItemAmount
Monthly rent£3,500
Annual rental income£42,000
Expenses (PM, insurance, etc.)£8,000
Net rental profit£34,000

Assuming the landlord has no other income:

CalculationResult
Taxable profit£34,000
Personal allowance (0% rate)–£12,570
Taxable at 20%£21,430
Tax due20% × £21,430 = £4,286
Less: mortgage interest reliefe.g., £1,200 (20% of £6,000)
Final tax payable£3,086

5. Landlord tax checklist

  • Register for Self Assessment with HMRC
  • Keep receipts and proof of expenses
  • Claim reliefs if furnished holiday let (FHL) or rent-a-room applies
  • File a tax return by 31 January every year

Sample of filing a tax return timeline: 

Tax Year CoveredDeadline to File OnlineDeadline to Pay Tax
6 Apr 2024 – 5 Apr 202531 January 202631 January 2026
6 Apr 2025 – 5 Apr 202631 January 202731 January 2027

You must submit your return and pay any tax due by 31 Jan of the following calendar year

Our tip: Work with a tax adviser (e.g. Gerald Edelman – @Druce’s partner) to structure your portfolio tax-efficiently, especially if you own multiple properties or operate through a company.

 

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