Buy-to-Let Tax Changes 2026 (UK Landlord Guide to Profits & Reliefs)

Introduction

Tax remains one of the biggest factors affecting buy-to-let profitability in the UK. In 2026, landlords must navigate rules around mortgage interest relief, income tax, and capital gains tax (CGT).

This guide explains what’s changed, what still applies, and how to structure your investment efficiently.

Estimate your numbers here: https://www.dynesourcer.co.uk/mortgages/buy-to-let-mortgage-calculator

Mortgage Interest Relief (Section 24)

For individual landlords, mortgage interest is no longer fully deductible. Instead, you receive a basic-rate (20%) tax credit.

Example: Rental income: 18,000 pounds Mortgage interest: 10,000 pounds You are taxed on the full 18,000 pounds Then receive a 20% credit on interest

This can significantly reduce net profit for higher-rate taxpayers.

Limited Company vs Personal Ownership

Many landlords now consider limited company structures.

Limited Company Pros: Mortgage interest is fully deductible Corporation tax (often lower than higher-rate income tax) Easier profit reinvestment

Considerations: Higher mortgage rates Setup and accounting costs Exit (selling) can be more complex

Capital Gains Tax (CGT)

When selling a buy-to-let property:

CGT applies to profit (gain) Rates depend on your income band Annual tax-free allowance may apply

Allowable Expenses

You may still deduct:

Letting agent fees Maintenance and repairs Insurance Legal/accounting costs

How to Improve Tax Efficiency

Review ownership structure Maximise allowable expenses Plan for long-term capital growth Seek professional tax advice

Conclusion

Tax rules can significantly impact buy-to-let returns in 2026. Understanding how income is taxed and choosing the right structure can help protect your profits.

Check affordability and returns: https://www.dynesourcer.co.uk/mortgages/buy-to-let-mortgage-calculator