At ten properties the problem stops being the tax return and starts being the reporting. You need to know which building earns and which is carried, there is a quarterly cycle to keep, and the incorporation question will not go away — so it is worth answering honestly.
All your UK residential lettings form a single property business for tax, and the return reports them together. That is a filing convention, not a management system, and treating it as both is the most common reason a portfolio landlord cannot answer a straightforward question about one building.
Property-level records answer what the combined figure cannot. Which property funds the others. What each one yields after its own interest, its own voids and its own maintenance. Whether the two flats bought in 2019 have ever repaid the refinance that bought them. Which building to sell first if you decide to reduce gearing. None of that is visible in a single line called rents received, and none of it appears in a letting agent's statement either, because the agent cannot see your borrowing.
Making Tax Digital raises the stakes. From 6 April 2026, landlords with qualifying income over £50,000 have to keep digital records and submit quarterly updates of category totals. Qualifying income is gross rent before expenses, added to any self-employment turnover, so a portfolio crosses the threshold long before its profits look substantial — a landlord with £45,000 of rent and £10,000 of interest is tested on £45,000. Records assembled once a year in a spreadsheet do not survive that cycle. See property bookkeeping.
An illustrative portfolio, on 2026/27 rates, for England, Wales and Northern Ireland — Scotland has six income tax bands of its own. Twelve properties, gross rent £180,000, mortgage interest £62,000, other allowable expenses £34,000, no other income.
| Step | Figure |
|---|---|
| Taxable property profit (interest not deducted) | £180,000 − £34,000 = £146,000 |
| Personal allowance | Nil — it tapers away above £100,000 |
| Tax at 20% on the £37,700 basic rate band | £7,540 |
| Tax at 40% on the £87,440 up to £125,140 | £34,976 |
| Tax at 45% on the £20,860 above £125,140 | £9,387 |
| Tax before the reducer | £51,903 |
| Reducer: 20% of the lowest of £62,000, £146,000 and £146,000 | £12,400 |
| Income tax payable | £39,503 |
The cash the portfolio actually generates is £180,000 − £34,000 − £62,000 = £84,000. A tax bill of £39,503 on £84,000 of real profit is an effective rate of 47%, before a pound has been spent on a new boiler. That is what the finance cost restriction does at scale, and it is why the incorporation question arrives at portfolio size rather than at property two. The Section 24 calculator puts your own figure on it.
The question everyone asks
Incorporating does not "solve" Section 24. It removes the finance cost restriction — companies carrying on a property business are not affected by it and deduct interest in full — and in exchange it introduces a second layer of tax and a one-off cost of getting there. Both halves have to be in the arithmetic or the answer is worthless.
Profits are retained and reinvested rather than drawn. The portfolio is geared enough that full interest deductibility outweighs the second layer of tax. The activity is genuinely a business on the Ramsay test, so incorporation relief under s.162 TCGA 1992 is available. And either a genuine partnership already exists, or the stamp duty bill is small against the ongoing saving.
From 6 April 2027 the case strengthens: property income moves to 22/42/47% for individuals, and companies are not mentioned in the measure.
You need the income personally — corporation tax at 19–25% plus dividend tax on extraction at 10.75% or 35.75% since 6 April 2026. The portfolio is unencumbered or lightly geared, so there was little interest to shelter. There is a large latent gain but no "business", so the whole gain crystallises. Or stamp duty on market value cannot be relieved.
Refinancing costs, commercial mortgage pricing, ATED exposure and the loss of the capital gains annual exempt amount inside a company all sit on the cost side.
Run it as arithmetic on your own numbers with the incorporation calculator, then read our incorporation page.
The trap at portfolio scale
Since 1 April 2023 corporation tax has been 25% on profits above £250,000, 19% at or below £50,000, and marginal relief in between. The detail that matters to a landlord is what happens to those two limits: both are divided by the number of associated companies, plus the company itself, and pro-rated for short accounting periods.
A landlord who has done what lenders encourage — one special purpose vehicle per property, or per mortgage — is dividing by four or five without ever having been told. With five associated companies the small profits limit becomes £50,000 ÷ 5 = £10,000 and the upper limit £250,000 ÷ 5 = £50,000. A company making £40,000 of profit that was budgeted at 19% is instead in marginal relief, at an effective rate above 19% that climbs as profits approach the upper limit. Five such companies means five computations wrong in the same direction.
This is the most expensive structural point on this page, and it is rarely spotted until a corporation tax computation arrives. It is worth establishing how many companies are associated before the next SPV is incorporated, not after. Property company accounts covers how the divisor works and what counts as associated.
From 6 April 2027 property income has its own income tax rates in England, Wales and Northern Ireland: 22%, 42% and 47%, each two percentage points above the general rates on earned income. The stated rationale is that property, savings and dividend income bear no National Insurance. The Section 24 reducer moves to the new property basic rate of 22%, a small offset against a much larger rise. In Wales the rates apply through the Welsh rates of income tax. Scotland sets its own income tax with six bands, and a Scottish taxpayer's property income stays on the Scottish rates; the Finance Act 2026 will let the Scottish Parliament and the Senedd set their own property income rates from a date the Treasury has not yet appointed.
Companies are not mentioned in the measure at all. It addresses individuals, partnerships, trusts and estates. For a landlord who retains profit, the gap between personal and corporate ownership therefore widens from that date.
Pulling the other way, dividend rates rose on 6 April 2026 — ordinary from 8.75% to 10.75%, upper from 33.75% to 35.75%, additional unchanged at 39.35%, allowance still £500. Extraction got more expensive in the same Budget that made retention more attractive. Which of the two dominates depends entirely on whether the money stays in.
Records that stay current, figures per property, and the structural questions answered with arithmetic rather than opinion.
Rent, expenses and interest tracked per building, so the quarterly update is a by-product rather than a project.
Property bookkeepingFour updates and the return, filed through compatible software, with the deadlines held rather than chased.
MTD for landlordsCorporation tax, extraction, the CGT and stamp duty of getting there, and the April 2027 rates — on your figures.
IncorporationStatutory accounts and corporation tax for each SPV, with the associated companies divisor applied correctly.
Property company accountsThe return itself, with the finance cost reducer, jointly held property and losses handled properly.
Landlord tax returnsStamp duty across SDLT, LTT and LBTT, and capital gains with its 60-day reporting window.
Capital gains taxBecause the corporation tax limits are divided by the number of associated companies plus the company itself. Since 1 April 2023 the small profits rate of 19% applies at or below £50,000, the main rate of 25% above £250,000, and marginal relief runs between them. With five associated companies the limits become £10,000 and £50,000. A company making £40,000 that expected 19% is instead in marginal relief, at an effective rate between 19% and 25% that rises as profits approach the upper limit. The limits are also pro-rated for short accounting periods. Landlords who set up an SPV per property are the group most often caught by this.
It removes the finance cost restriction, which is not the same thing. A company gets a full deduction for mortgage interest because Section 24 does not apply to companies. What incorporating introduces is a second layer of tax and a cost of getting there. Corporation tax runs at 19% to 25% with marginal relief, and taking money out costs dividend tax on top — 10.75% at the ordinary rate and 35.75% at the upper rate since 6 April 2026. Transferring property to a company you control is a disposal to a connected person at market value for capital gains tax, and stamp duty is charged on market value too.
A summary, not a return. Each quarterly update reports totals for each income and expense category from your digital records — HMRC does not receive individual receipts or invoices, and you do not have to make accounting or tax adjustments before you send one. On the standard tax-year-aligned periods the deadlines are 7 August, 7 November, 7 February and 7 May. Calendar quarters ending 30 June, 30 September, 31 December and 31 March may be elected instead, with the same deadlines. No tax is paid quarterly, and the return is still due by 31 January, filed through MTD software.
Late submission is points-based: one point for each missed quarterly update or return, a threshold of four points, then a £200 penalty and £200 for each further miss. There are no penalties for missing a quarterly update deadline in the 2026 to 2027 tax year, but each update still has to be sent before the tax return. Late payment is separate. For 2026/27 nothing is charged in the first fifteen days; 3% of the tax outstanding at day 15 if you pay between sixteen and thirty days late; and at thirty-one days or more, 3% at day 15 plus 3% at day 30 plus 10% a year on the balance. Those 3% figures become 4% for 2027/28. In your first year under the new penalties you have 30 days to pay, or to set up a payment plan with HMRC, before any penalty applies.
It changes two things worth knowing. Partnerships are not currently within Making Tax Digital for Income Tax and no date has been set, so a landlord holding through a partnership has no quarterly filing obligation at present. And on an incorporation, paragraph 18 of Schedule 15 to the Finance Act 2003 can reduce the stamp duty chargeable consideration where a chargeable interest passes from a partnership to a connected company, by reference to the sum of the lower proportions. But paragraph 18 is expressly subject to the anti-avoidance rule in paragraph 24, and a genuine partnership has to exist beforehand.
For a landlord who retains profits, yes, on the arithmetic. From 6 April 2027 property income has its own income tax rates in England, Wales and Northern Ireland of 22%, 42% and 47%, two percentage points above the general rates. Companies are not mentioned in the measure, so corporation tax on rental profit is unaffected at 19% to 25%. The gap between holding personally and holding in a company therefore widens for profit that stays in the business. It narrows again the moment you take money out, because dividend rates rose on 6 April 2026 to 10.75% and 35.75%.
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FreeAgent PartnerWe work out what Section 24 costs you now, what a company would cost including the cost of moving into one, and how many of your companies count as associated.
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