Finance
Tax return pack (SA105)
Year-end summary of rental income and allowable expenses, mapped to HMRC's SA105 (UK property) form.
What's allowable (key rules)
- Mortgage interest isn't deducted from profit — it's relieved as a 20% basic-rate tax credit (shown as Box 44). Only the interest counts, not capital repayment.
- Repairs that restore the property are allowable; improvements are capital and aren't (they may reduce CGT on sale instead).
- Replacing domestic items (white goods, carpets, furniture) is allowable under Replacement of Domestic Items Relief; the first purchase and upgrades are not.
- During void periods only your actual costs (council tax, utilities) are allowable — there's no notional “void allowance”.
What it is
SA105 is the “UK property” supplementary page of the Self-Assessment tax return. If you let out property in the UK, this is where you report rental income and expenses to HMRC every year. The UK tax year runs 6 April → 5 April the following year.
Why it matters
Most landlords either pay an accountant £200–500 to do this, or stare at a spreadsheet for hours getting the numbers wrong. This page does the maths automatically from the rent payments you've already logged and the property expenses on file. Section 24 means residential mortgage interest no longer reduces your taxable profit — it comes back as a 20 % tax credit instead. We track both separately.
What to do
1. Pick the tax year above.
2. Check the numbers below match what landed in your bank account.
3. Download the CSV to send to your accountant — or use the box totals to fill the SA105 form directly on the gov.uk site.
This is informational. Get tax advice for non-trivial cases — limited-company landlords, FHLs, mixed-use, jointly-owned property and prior-year losses all need professional input.
Mileage claim
Visit miles for this tax year are automatically included in Box 29 below, computed at HMRC tiered rates (45p first 10,000 mi, 25p after). The breakdown table shows the line item.
Open mileage report →