Section 24 Tax Calculator for UK Landlords
See exactly how Section 24 affects your rental income. Compare your tax bill across different income bands and understand the true cost of mortgage interest restrictions.
Your Property Details
Enter your annual figures to see the Section 24 impact
£
Service charges, repairs, agent fees, etc.
£
Interest-only payment × 12
£
Your Section 24 Tax Impact
Gross Rental Income£12,000
Operating Costs-£2,000
Mortgage Interest-£5,000
Net Income (Pre-Tax)£5,000
Section 24 Tax Calculation
Taxable Profit (Interest NOT deductible)£10,000
Gross Tax @ 40%£4,000
Section 24 Relief (20% credit)-£1,000
Tax Bill£3,000
Cashflow After Tax
What actually hits your bank account
£2,000
Section 24 Impact
You're paying £1,000 more in tax per year compared to pre-2017 rules when mortgage interest was fully deductible.
Compare Across Tax Bands
Basic (20%)
£1,000
+£0 burden
Higher (40%)
£3,000
+£1,000 burden
Additional (45%)
£3,500
+£1,250 burden