UK Rental Income Tax Calculator 2025/26 (SA105, Section 24)

📍 Rental Property Details

Monthly Rent Collected

£/month

Annual Allowable Expenses (insurance, repairs, agent fees)

£/year

Annual Mortgage Interest (capital repayment loan)

£/year

Other Taxable Income (salary, pension)

£/year

Claim the £1,000 Property Income Allowance instead of your actual expenses — useful when real expenses are under £1,000 (ITTOIA 2005 s.783A).

Gross Rental Income (12 months) £14,400.00

Allowable Expenses £1,600.00

Net Rental Profit (SA105) £12,800.00

Property Loss Carried Forward —

Personal Allowance Applied £12,570.00

Total Taxable Income (property + other) £28,230.00

Income Tax on Property (before relief) £284.00

Section 24 Basic-Rate Reduction (20%) - £480.00

Effective Rate on Rental Profit 0.00 %

Property Income Tax Due (SA105) £0.00

Personal Allowance £12,570; basic rate 20% on taxable income up to £37,700; higher rate 40% up to £125,140; additional rate 45% above — thresholds frozen through April 2028 (HMRC income tax rates).
Mortgage interest is not an allowable deduction: a flat basic-rate reduction of 20% on the lowest of finance costs, property profits or total taxable income (Section 24, s.274AA ITTOIA 2005, Finance (No.2) Act 2017).
Property Income Allowance: a flat £1,000 deduction from property income (ITTOIA 2005 s.783A).
Replacement of Domestic Items relief (ITTOIA 2005 s.311A) can be added to allowable expenses where items are replaced in a let property.

Generate your UK buy-to-let documents and keep this calculation — no registration needed to simulate.