Section 24 Calculator.

See how Section 24 mortgage interest restrictions affect your tax bill as a landlord. Compare old rules vs current rules.

Rates last updated: June 2026 (tax year 2025/26)

Annual Rental Income

Annual Mortgage Interest

Other Allowable Expenses(optional)

Letting agent fees, repairs, insurance, etc.

Your Tax Band

Other Taxable Income(optional)

Used to check if Section 24 pushes you into the higher rate band.

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This calculator provides an estimate for illustrative purposes only and does not constitute tax advice. Please seek professional advice before making any decisions.