Net pay: enter the full gross amount deducted from your salary before tax is worked out.
Tax relief is given automatically through payroll.
Relief at source: enter the amount you actually pay from take-home pay
(before the 20% basic rate top-up is added by your provider).
Salary sacrifice: enter the amount of salary you have given up.
Your employer contributes this directly into your pension, reducing both your income tax and National Insurance.
Enter allowable expenses you can deduct in full from rental income before tax.
Examples: letting/management fees, maintenance & repairs (not improvements), utilities, insurance, service charges, ground rent, professional fees.
Mortgage interest isn't a deductible expense for rental profit. Instead you receive a
20% tax credit on the interest paid, subject to HMRC caps.
Example: £10,000 interest → £2,000 credit.