How UK rental income is taxed: the tax-free allowance instead of expenses, the deadlines HMRC enforces, and which pages carry which figures.
A UK landlord with rental income chooses between two ways of working out the taxable profit. Claim the property income allowance: up to £1,000 of gross property income each tax year is exempt, claimed in box 20.1 of the UK property pages, and where total property income including foreign income does not exceed £1,000 nothing needs to be reported at all. The alternative is deducting actual allowable expenses from the receipts. The two routes are exclusive: if the allowance is claimed, no allowable expenses and no other allowances can be deducted against that income, and where expenses exceed income the expense route is usually the better one. Joint owners each claim their own £1,000 against their share, but the allowance is unavailable where any income comes from a connected party, and it cannot be used on the same income as Rent a Room relief.
The Rent a Room scheme covers income from letting furnished rooms in a landlord's only or main home, and the first £7,500 of that income each year is tax-free. Where the income is shared with a spouse or partner, or two people are entitled to the relief on the same home, the limit becomes £3,750 each. If gross receipts exceed the limit, the choice is between paying tax on the whole amount and claiming the actual allowable expenses of the letting instead — and having claimed Rent a Room relief, the landlord cannot also deduct expenses or claim the property income allowance on that same income. Because the scheme applies to rooms in the landlord's own home, it never reaches a separate let-out property, so a buy-to-let landlord works through the allowance or the expense calculation described above.
Property income above £2,500 must be declared, which normally means registering for Self Assessment by 5 October after the end of the tax year in which the income arose; where gross property income sits between £1,001 and £2,500 and no return is already due, HMRC should be told rather than left out of the picture. The return itself, with the SA105 UK property pages attached, is due online by 31 January following the end of the tax year, or by 31 October for a paper return. The same 31 January date carries the balancing payment for the year just ended and the first payment on account for the year underway, with the second payment on account falling on 31 July — unless HMRC has reduced those payments, the bill is below £1,000, or more than 80 per cent of the liability is already collected at source.
The SA105 UK property pages carry UK rents and the allowable expenses set against them, while overseas property income and other foreign income go to the SA106 foreign pages of the same return, so a landlord with both prepares the two side by side. Since the tax years beginning on 6 April 2025 the furnished holiday lettings rules no longer apply: former holiday lets join the ordinary property business, with replacement of domestic items relief in place of the old capital allowances and finance costs falling under the Section 24 restriction. Underneath all of it sits the record — rents received, expenses paid, and the calculation behind every figure — which HMRC can ask to see. KAZAALBAIDA keeps that record set property by property, maps expenses to the categories the rules allow, works out the Section 24 credit, and produces the totals the SA105 summary is built from.
The £1,000 property income allowance, Rent a Room relief, SA105 and SA106, and every Self Assessment deadline UK landlords must meet.
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