The average landlord owns 7.3 properties. You own 3.

Three rental properties felt like a proper portfolio once. You've weathered a run of rate rises, kept on top of gas safety certificates and EPC paperwork, and watched Section 24 quietly shrink what you actually keep from the rent each month. Then you read that the average UK landlord now owns 7.3 properties, more than double what you have, and the question you can't quite shake is whether you're running a business or just holding on to a hobby that used to pay.

That gap is real, and it isn't random. New research from Pegasus Insight puts the average UK landlord portfolio at 7.3 properties, while landlords who've incorporated into a limited company average 15.3 properties each, up from 12.8 just two quarters earlier (Pegasus Insight Landlord Trends research, 8 July 2026). The buy-to-let sector isn't shrinking. It's consolidating around bigger, more professional operators, and that has a direct bearing on whether incorporating your own three-property portfolio is worth the tax bill it triggers on the way in.

Why the average landlord doesn't look like you anymore

The professionalisation is genuine, not a marketing line. Pegasus Insight's research finds 21% of landlords now describe themselves as full-time or self-employed, up from 17% at the end of 2025, and that limited company landlords now hold around 66% of their properties through a corporate structure (Pegasus Insight, 8 July 2026). Almost four in ten landlords with borrowing in place expect to remortgage in the next year, rising to 56% of those with four or more buy-to-let mortgages, a sign that portfolio landlords are actively managing their financing rather than sitting still.

The purchasing data backs this up. The share of homes bought by landlords exceeded the share they sold last month for the first time since 2019, according to Hamptons' analysis of Connells Group data (LandlordZone, 13 July 2026). But look closer and it's not a broad-based return of the small landlord: landlords accounted for a fairly muted 10% of all purchases in June, and 9% of homes listed for sale had previously been rented, down from 11% a year earlier. Part of that slowdown is the Renters' Rights Act itself. Landlords who serve a Ground 1A notice to sell now face a mandatory 12-month ban on re-letting the property if it doesn't sell, which is making smaller landlords more cautious about listing in a sluggish market rather than more willing to exit.

So if you've been assuming the sensible move is to follow the herd out of the sector, the data says the herd that's actually buying right now looks nothing like a nervous small landlord heading for the door. It looks like a limited company adding to an already-large portfolio, which is exactly the group that has already priced in every decision below.

Does Section 24 still justify staying personal, or is it time to incorporate?

Take a fairly ordinary three-property portfolio: three homes in Yorkshire and the Humber at the regional average price of £247,000 each, £741,000 in total (Land Registry / ONS UK House Price Index, April 2026). Financed at 75% loan-to-value with the average buy-to-let fixed rate of 5.42% (Moneyfacts, 1 July 2026), that's £555,750 borrowed and £30,122 in annual mortgage interest. Yorkshire and the Humber is one of six UK regions now averaging above an 8% gross rental yield (Fleet Mortgages Q1 2026 Rental Barometer), so at 8% these three properties bring in £59,280 a year in rent between them, or £4,940 a month.

Strip out running costs, a 12% management fee, a month's void allowance, landlord buildings insurance (NimbleFins puts the median at £226 a year per property in 2026) and a 1%-of-value maintenance reserve, and you're left with £39,138 a year in profit before mortgage interest. That's a net yield of 5.28% before finance costs and tax, a genuinely solid number on paper.

Then Section 24 does its work. As a higher-rate taxpayer, you're taxed on the full £39,138 rather than on profit after interest, and you only get a 20% credit on the £30,122 of interest, worth £6,024. Tax due comes to £9,631, leaving cash flow of roughly minus £614 a year across the whole portfolio, or about minus £51 a month. A basic-rate taxpayer on the identical portfolio pays just £1,803 in tax and keeps around £7,213 a year, or roughly £601 a month, more than four times better off on paper for owning exactly the same three properties.

So if you're a higher-rate taxpayer running three fairly ordinary rental properties like these, Section 24 isn't just squeezing your margin. It can tip a genuinely decent 8% gross yield into a portfolio that barely breaks even after tax, which is precisely the pain point pushing so many landlords to ask about incorporating in the first place, as we found when we ran the same after-tax maths on a Manchester buy-to-let yielding a similar gross return.

The real cost of incorporating a 3-property portfolio

Moving properties you already own into a limited company isn't a simple bit of paperwork. HMRC treats it as if the company is buying the properties from you at full market value, which means two separate tax bills land on the same day.

First, Capital Gains Tax on you personally. Say you bought these three properties back in 2018 for around £160,000 each and they're now worth £247,000 apiece (Land Registry / ONS, April 2026), that's an £87,000 gain per property, £261,000 in total. After the £3,000 annual exempt amount for 2026/27 (GOV.UK), £258,000 is taxable, and as a higher-rate taxpayer the whole amount is charged at 24% on residential property gains (GOV.UK Capital Gains Tax rates, current for 2026/27), a bill of £61,920.

Second, Stamp Duty Land Tax on the company. It's treated as a fresh purchase at market value, so the standard bands plus the 5% buy-to-let surcharge (raised from 3% at the Autumn Budget 2024) apply in full, £14,790 per property. There's no discount for buying three at once either: Multiple Dwellings Relief, which used to soften portfolio transfers, was abolished for transactions completing on or after 1 June 2024 (GOV.UK). That's £44,370 in Stamp Duty across the three properties.

Add it up and you're looking at £106,290 in Capital Gains Tax and Stamp Duty alone, before legal, valuation and accountancy fees on top. Incorporation relief can defer the Capital Gains Tax bill, but only if HMRC accepts you're running a genuine property business rather than passively holding investments, a test that typically demands a serious weekly time commitment most landlords juggling three properties alongside a day job simply don't meet.

So before you even get to whether a limited company saves tax each year, you need to find over £106,000 in cash, or borrow against properties you already own to raise it, just to walk through the door.

Does the annual tax saving ever catch up?

Inside a limited company, the same £39,138 of profit minus £30,122 of interest gives a taxable profit of £9,017, and because that's under the £50,000 small profits threshold it's taxed at 19% Corporation Tax, £1,713 (GOV.UK Corporation Tax rates, 2026/27). That leaves £7,304 retained in the company each year, against roughly minus £614 personally, a gap of about £7,918 a year if you leave the profit to build up inside the business.

The catch is that £7,304 isn't in your pocket. To spend it, you have to draw it out as a dividend, and at the higher dividend rate of 35.75% for 2026/27 (GOV.UK), after the £500 tax-free allowance, that strips out roughly £2,432 in tax, leaving about £4,871 a year, an improvement of around £5,486 over staying personally owned rather than the headline £7,918 figure most incorporation guides quote. On top of that, limited company buy-to-let mortgage rates typically run 0.2 to 0.5 percentage points above equivalent personal-name deals (Mortgage International, 2026), which would stretch either break-even figure out further still once you refinance into the company's name, a dynamic we've also seen distort the numbers on a similarly-sized Liverpool buy-to-let portfolio.

Run the sums either way and you land somewhere between 13 and 19 years before incorporation pays for the tax bill it triggered on day one, a horizon that stretches beyond most 25-year buy-to-let mortgage terms if you're drawing the income, and comfortably beyond it either way if you were planning to sell up within the decade rather than build a much larger business, an option we've also weighed against buying more stock in areas like Outer London, where the Section 24 finance-cost relief cap adds yet another layer to the same calculation.

So if you need this money to live on rather than to reinvest and grow, you're looking at the best part of two decades before incorporation genuinely pays for itself, which is longer than most people plan to hold a settled three-property portfolio.

What this means for you

The maths points toward staying personally owned for most landlords sitting at three properties who need the rent to top up their own income. Incorporation earns its keep at scale, for landlords who are still actively buying, reinvesting profit rather than drawing it, or starting a portfolio from scratch where there's no existing gain to trigger a Capital Gains Tax bill. That's exactly why the average incorporated landlord already runs 15.3 properties rather than three: the £106,000-plus entry cost gets diluted across a much bigger income base, and the whole calculation looks completely different if you're not paying Capital Gains Tax on a decade of accumulated growth in the process.

Frankly, if you're one of the growing number of smaller landlords weighing up whether to sell a property and redeploy the capital elsewhere rather than restructure, that instinct holds up better under this maths than incorporating does. Most three-property landlords in this position are better off staying personally owned and managing the Section 24 hit, perhaps by reviewing your mix of basic-rate versus higher-rate income sources, than paying over £106,000 upfront for a tax saving that takes the best part of two decades to recover. This is a decision worth running past an accountant who knows your full tax position before you commit either way, since your own gain, income and plans will move these numbers materially.