Understanding how much tax you'll pay on rental income in the UK is crucial for every property investor. Your rental income tax bill depends on several factors: your total income, allowable expenses, mortgage interest restrictions, and significant changes coming in April 2027.

This guide explains exactly how tax on rent received is calculated, what rates apply, and how to minimise your liability legally. The tax landscape for landlords is changing dramatically, so getting the calculations right matters more than ever.

Current Rental Income Tax Rates 2025/26

For the 2025/26 tax year, rental income is taxed as part of your total income using standard income tax rates:

  • Basic rate (20%): Income between £12,571-£50,270
  • Higher rate (40%): Income between £50,271-£125,140
  • Additional rate (45%): Income above £125,140

However, this changes dramatically from April 2027. From that point, property income will be taxed at separate rates: 22% basic rate, 42% higher rate, and 47% additional rate. This means landlords will pay more tax on their rental profits than other forms of income.

How Rental Income Tax Is Calculated

Your tax on rent received isn't calculated on gross rental income. HMRC taxes your net rental profit after deducting allowable expenses and applying Section 24 mortgage interest restrictions.

Step 1: Calculate Gross Rental Income

Include all rental income received during the tax year:

  • Monthly rent payments
  • Deposits retained for damages
  • Letting fees paid by tenants
  • Premium payments for lease assignments

Step 2: Deduct Allowable Expenses

You can deduct legitimate property expenses from your rental income:

  • Property management fees
  • Repairs and maintenance
  • Insurance premiums
  • Safety certificates (gas, electrical, EPC)
  • Professional fees (legal, accounting)
  • Advertising for tenants
  • Council tax (if landlord responsibility)

For a comprehensive list of what you can claim, see our guide on landlord tax deductions.

Step 3: Apply Section 24 Restrictions

Mortgage interest is no longer fully deductible. Instead, you receive a basic rate tax credit (20%) on your mortgage interest payments. This significantly increases the effective tax rate for leveraged landlords.

For detailed information on how this works, read our complete Section 24 guide.

Worked Example: Rental Income Tax Calculation

Let's calculate the rental income tax bill for Sarah, who owns two buy-to-let properties and has a full-time job earning £45,000.

Sarah's Property Income 2025/26:

  • Gross rental income: £18,000
  • Allowable expenses: £3,500
  • Mortgage interest: £8,000
  • Net rental profit (before Section 24): £6,500

Tax Calculation:

Step 1: Add back mortgage interest for income tax calculation
Taxable rental income: £6,500 + £8,000 = £14,500

Step 2: Calculate total income
Employment income: £45,000
Rental income: £14,500
Total income: £59,500

Step 3: Apply income tax rates
£50,270 at 20% = £10,054
£9,230 (£59,500 - £50,270) at 40% = £3,692
Total income tax: £13,746

Step 4: Deduct Section 24 tax credit
Mortgage interest tax credit: £8,000 × 20% = £1,600
Final tax liability: £13,746 - £1,600 = £12,146

Without rental income, Sarah would pay £6,454 in income tax. Her additional tax on rent received is therefore £5,692 on £6,500 of actual rental profit - an effective rate of 87.5%.

The April 2027 Property Tax Changes

From April 2027, the tax calculation becomes more straightforward but potentially more expensive. Property income will be taxed at dedicated rates:

  • Basic rate landlords: 22% on rental profits
  • Higher rate landlords: 42% on rental profits
  • Additional rate landlords: 47% on rental profits

Using Sarah's example above, under the 2027 system she would pay 42% on her £6,500 rental profit = £2,730. This is significantly less than the current effective rate of 87.5%.

Factors That Affect Your Rental Income Tax Bill

Your Total Income Level

The more you earn from all sources, the higher your marginal tax rate on rental income. A basic rate taxpayer pays far less tax on rent received than someone in the additional rate band.

Property Type

Different property types have varying tax implications:

  • Residential BTL: Subject to Section 24 restrictions
  • Commercial property: Full mortgage interest relief still available
  • HMOs: Higher expenses but potential business rates liability
  • Holiday lets: Furnished Holiday Lettings regime abolished from April 2025

Leverage and Mortgage Interest

Highly leveraged landlords are hit hardest by Section 24. Cash buyers or those with small mortgages face lower effective tax rates on their rental income tax bill.

Incorporation Status

Limited companies don't face Section 24 restrictions and pay corporation tax at 19% (up to £250k profit) or 25% (above £250k). This can result in significant tax savings for portfolio landlords. Learn more about buy-to-let limited companies.

How to Reduce Your Rental Income Tax

Maximise Allowable Expenses

Keep detailed records of all property-related expenses. Many landlords miss legitimate deductions that could reduce their tax on rent received.

Consider Incorporation

Moving properties into a limited company can provide significant tax savings, especially for higher-rate taxpayers with mortgaged properties. However, there are costs involved including SDLT on the transfer.

Spouse/Civil Partner Planning

If your partner has unused basic rate band, consider transferring property ownership to balance income and reduce the overall rental income tax bill.

Pension Contributions

Personal pension contributions can reduce your adjusted net income, potentially keeping you in a lower tax band. This is particularly valuable for landlords pushed into higher rate tax by rental income.

Record Keeping and Compliance

From April 2026, Making Tax Digital becomes mandatory for landlords with gross property income over £10,000. You'll need to:

  • Keep digital records of all income and expenses
  • Submit quarterly updates to HMRC
  • File an annual property business summary

Proper record keeping is essential for calculating your exact rental income tax bill and claiming all available deductions.

Getting Professional Help

Calculating how much tax you'll pay on rental income in the UK is complex, especially with Section 24 restrictions and the upcoming 2027 changes. Many landlords benefit from professional guidance to ensure they're not overpaying tax or missing opportunities to reduce their liability.

A qualified property accountant can help you navigate the rules, maximise your deductions, and plan for the future tax changes. The cost of professional advice often pays for itself through tax savings and peace of mind.

For complex portfolios or incorporation decisions, the potential savings can be substantial. Our property tax services include tax planning, compliance support, and strategic advice tailored to your specific situation.