Inputs
UK landlord tax calculator
Section 24 tax relief calculator for landlords
Estimate how the residential landlord finance-cost restriction affects tax, cash flow, and the difference between the old mortgage-interest deduction method and the current basic-rate tax reducer.
Output
Your Section 24 estimate
Ready
£0
Enter figures and calculate.
Planning estimate
Unbiased calculation based on HMRC rules
Update to date
Reflects 2025/26 rates and April 2025 changes
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This calculator provides a planning estimate only and is not tax, mortgage, legal, insurance, or investment advice. Section 24 calculations can be affected by income ordering, losses, Scottish tax bands, jointly owned property, partnerships, companies, carried-forward finance costs, allowances, and Self Assessment rules. Speak to a qualified adviser before acting.