Buy-to-let properties are a popular investment, but they come with significant tax obligations. Understanding the tax landscape is essential for maximizing your returns and staying compliant. This guide covers everything you need to know about buy-to-let tax.
For a complete overview of property tax, see our main Property owners and landlords page.
Stamp Duty Land Tax (SDLT)
When you buy a buy-to-let property, you pay Stamp Duty Land Tax (SDLT) at the prevailing rates. The rates depend on the property value and whether it’s a second home.
SDLT Rates for Second Homes (2025-26)
If the property is a second home (including buy-to-let), you pay an additional 3% surcharge on top of the standard rates.
| Property Value | Standard SDLT Rate | Second Home Surcharge | Total SDLT Rate |
|---|---|---|---|
| Up to £250,000 | 0% | 3% | 3% |
| £250,001 to £925,000 | 5% | 3% | 8% |
| £925,001 to £1.5m | 10% | 3% | 13% |
| Over £1.5m | 12% | 3% | 15% |
Important: These rates are for England and Northern Ireland. Wales and Scotland have separate rates.
How to Pay SDLT
You must pay SDLT within 14 days of completion. Your conveyancer typically handles this.
Income Tax on Rental Income
Your rental income is taxed as part of your annual income.
- Property Allowance: Up to £1,000 tax-free.
- Taxable Profit: Rental income minus allowable expenses.
- Tax Rates: 20%, 40%, or 45% depending on your total income.
See our guides: Rental Income Tax Guide and Allowable Expenses for Landlords.
Mortgage Interest Relief
Since April 2017, landlords have only been able to get tax relief on mortgage interest at the basic rate (20%), regardless of their tax band.
- Not Deductible: Mortgage interest is not deducted from your rental income.
- Tax Credit: You get a tax credit of 20% of the interest paid.
- Impact: This can push you into a higher tax band.
See our guide: Mortgage Interest Relief for Landlords.
Capital Gains Tax (CGT)
When you sell your buy-to-let property, you may have to pay CGT on the gain.
- Rates: 18% (basic rate) or 24% (higher rate).
- Annual Exempt Amount: £3,000 per year.
- Reporting: You must report and pay within 60 days of completion.
See our guide: Capital Gains Tax for Landlords.
Furnished Holiday Lets (FHL)
If your buy-to-let property is a furnished holiday let, it qualifies for different tax treatment.
- Advantages: Full mortgage interest relief, capital allowances, business asset disposal relief (10% CGT).
- Eligibility: Must be available for at least 210 days and let for at least 105 days.
See our guide: Furnished Holiday Lets Tax Guide.
Tax Planning for Buy-to-Let Investors
1. Consider a Limited Company
For higher-rate taxpayers, holding property through a limited company can be more tax-efficient. However, it also involves corporation tax and other costs.
2. Use Your Spouse’s Allowance
Transferring property to your spouse to use their Personal Allowance and basic rate band can reduce your tax bill. See our guide: Joint Property Ownership.
3. Keep Good Records
Maintain detailed records of all rental income and expenses. See our guide: Record Keeping for Self-Employed.
4. Plan for CGT
Understand how CGT works and consider the timing of property sales to minimize the tax bill.
How We Can Help
Our ACCA-qualified accountants specialize in buy-to-let tax and can:
- Advise on the most tax-efficient structure for your property portfolio.
- Prepare and file your tax return.
- Help you claim all available reliefs and allowances.
- Plan for Capital Gains Tax.
Let us help you maximize your buy-to-let returns.
📚 Related Guides
• Property owners and landlords
• Rental Income Tax Guide
• Allowable Expenses for Landlords
• Mortgage Interest Relief for Landlords
• Capital Gains Tax for Landlords
• Furnished Holiday Lets Tax Guide
• Joint Property Ownership
• Record Keeping for Self-Employed
💰 Services & Pricing
• View our fixed-fee pricing →
• Property and landlords services →
• About Right Tax Returns →
• What our clients say →