Limited Company Buy-to-Let: Why 80% Are Going Corporate

Four out of five new buy-to-let purchases in the UK now go through a limited company. That is not a projection or a trend forecast. It is the reality of Q1 2026, confirmed by Fleet Mortgages' latest Rental Barometer published on 2 April 2026. Limited company applications accounted for 78% of all buy-to-let mortgage submissions in the first quarter. And 66,587 new buy-to-let companies were incorporated in 2025 alone, an 8% jump year-on-year and a 363% increase over the past decade, according to Companies House data analysed by Hamptons.

Something has shifted permanently in how UK landlords structure their property holdings. This is not a fad. It is a rational response to a tax system that has been progressively penalising personal ownership for seven years. And with the 2% rental income tax surcharge arriving in April 2027 for personal landlords only, the gap between the two structures is about to widen further.

What is driving landlords to limited companies?

The single biggest driver is Section 24 of the Finance Act 2015, which phased out mortgage interest tax relief for individual landlords between 2017 and 2020. Before Section 24, a higher-rate taxpayer with a £200,000 interest-only mortgage at 5.5% could deduct the full £11,000 annual interest cost from their rental income before calculating tax. That deduction saved them £4,400 a year in tax. After Section 24, that same landlord gets only a 20% tax credit worth £2,200, regardless of their actual tax rate. The effective tax increase for a 40% taxpayer on that single property is £2,200 per year.

Limited companies were never affected by Section 24. A buy-to-let held in a Special Purpose Vehicle (SPV) still deducts 100% of mortgage interest as a business expense before calculating profit. Corporation tax on the remaining profit is 19% for companies earning under £50,000 annually, rising to 25% for profits above £250,000. Compare that with the 40% income tax a higher-rate personal landlord pays, and the arithmetic is obvious.

But Section 24 has been in effect since 2020. So why is the shift still accelerating in 2026? Three reasons.

The 2% rental income surcharge. Announced in the October 2025 Autumn Budget, this adds 2 percentage points to income tax on rental income held in personal names from April 2027. Basic-rate landlords will pay 22% instead of 20%. Higher-rate landlords will pay 42% instead of 40%. Limited companies are explicitly excluded. This is the clearest signal yet that the Treasury sees corporate structures as the intended vehicle for buy-to-let investment.

Making Tax Digital. From 6 April 2026, landlords with gross income above £50,000 must file quarterly digital tax returns. This applies only to individuals filing Self Assessment, not to limited companies. The compliance burden of four additional HMRC submissions per year, on top of everything else hitting personal landlords in 2026, is pushing fence-sitters toward incorporation.

Mortgage product availability. Five years ago, limited company BTL mortgages were niche products with rates 0.5% to 1% higher than personal equivalents. That premium has narrowed dramatically. In Q1 2026, several specialist lenders offer limited company rates within 0.15% of their personal name products. The cost disadvantage has largely disappeared, while the tax advantages have grown.

The numbers for a typical portfolio

Consider a landlord with five buy-to-let properties generating £60,000 gross rental income and £30,000 in mortgage interest annually. They are a higher-rate taxpayer with employment income pushing them above the £50,270 threshold.

Under personal ownership in 2026-27, the taxable rental income is £60,000. Mortgage interest cannot be deducted as an expense. Instead, the landlord gets a 20% tax credit on the £30,000 interest, worth £6,000. Tax at 40% on £60,000 is £24,000, minus the £6,000 credit, giving a tax bill of £18,000. From April 2027, that 40% becomes 42%, pushing the bill to £19,200.

Under a limited company, the £30,000 mortgage interest is deducted as a business expense. Taxable profit is £30,000. Corporation tax at 19% (under the £50,000 small profits threshold) is £5,700. That is a saving of £12,300 per year, rising to £13,500 from April 2027. Over a decade, that difference compounds to well over £130,000, before you even factor in the reinvestment potential of those annual savings.

Those numbers shift depending on your specific situation: how many properties you own, your personal tax rate, your mortgage loan-to-value ratios, and whether you need to extract profit from the company as dividends (which triggers additional tax). A tax structure analysis tool built specifically for UK property investors can model these scenarios with your actual numbers, showing the after-tax position across different structures before you commit to anything.

When a limited company does not make sense

Not every landlord benefits from incorporation. The corporate structure has real disadvantages that the "just go limited" crowd often glosses over.

If you are a basic-rate taxpayer with one or two properties and no mortgage, the corporation tax plus dividend tax on extraction can actually cost you more than personal ownership. A landlord with no mortgage interest to deduct (because they own outright) loses the main advantage of corporate structure. Their rental profit is the same regardless of ownership vehicle, but extracting it from a company adds a layer of dividend tax that personal ownership avoids.

Capital gains tax treatment differs too. Individuals get a £3,000 annual CGT allowance and pay 18% (basic rate) or 24% (higher rate) on residential property gains. Companies pay corporation tax on the full gain with no annual allowance. For a single high-value property held long-term, the personal CGT treatment can be more favourable, particularly if you time disposals to use your annual allowance.

There is also the administrative overhead. A limited company files annual accounts with Companies House, pays for an accountant (typically £800 to £1,500 per year for a BTL SPV), and files a Corporation Tax return with HMRC. These costs eat into the tax saving. For a single property generating modest profit, the accountancy fees alone can wipe out the advantage.

And if you plan to live off your rental income rather than reinvest it, you need to extract the money from the company. Director salary (up to the National Insurance threshold of £12,570) is tax-efficient. Beyond that, dividends are taxed at 8.75% (basic rate), 33.75% (higher rate), or 39.35% (additional rate) from April 2026. The combined corporation tax plus dividend tax can approach or exceed the personal income tax rate for landlords who extract all their profits.

The transfer trap: why switching is not free

Here is the part that catches people out. If you already own properties in your personal name and want to move them into a limited company, you are not simply transferring them. In HMRC's eyes, you are selling the properties to the company and the company is buying them. That triggers two taxes.

Capital Gains Tax on the "sale" at market value. If your properties have appreciated since purchase, you will owe CGT on the gain, just as if you had sold on the open market. For a property bought at £150,000 now worth £220,000, the gain of £70,000 minus your £3,000 annual allowance leaves £67,000 taxable. At 24% for a higher-rate taxpayer, that is £16,080 in CGT. Per property.

Stamp Duty Land Tax on the "purchase" by the company. The company pays SDLT at the additional property rates on the full market value. On a £220,000 property, that is roughly £12,100 at the current 5% surcharge rates. Again, per property.

For a five-property portfolio with total gains of £300,000, the combined CGT and SDLT bill for incorporation can easily exceed £100,000. That is real money that must be paid upfront, and it takes years of tax savings to recoup. Section 162 incorporation relief can potentially defer the CGT if the transfer qualifies as a going concern, but HMRC scrutinises these claims closely and the conditions are strict. Professional advice is not optional here; it is essential.

This is why the 80% figure applies to new purchases, not existing portfolios. Most landlords who already own personally are keeping those properties where they are and buying any new additions through a company. A split structure, with legacy properties held personally and new acquisitions in an SPV, is the most common approach in 2026. A portfolio growth planning tool can model this split structure, showing you the optimal allocation based on your existing holdings, planned acquisitions, and long-term goals.

What the Q1 2026 yield data tells us about corporate landlords

Fleet Mortgages' Q1 2026 Rental Barometer reveals something beyond the headline 8.1% national average yield. Six regions now record average yields above 8%: the North East (9.8%), Yorkshire and Humberside, the West Midlands, the North West, Wales, and the East Midlands. Greater London sits at the bottom with 6.1%.

The more telling statistic is that average loan sizes rose to £210,000 in Q1 2026. Larger portfolio landlords are increasing their market presence while smaller landlords continue to exit. This is the professionalisation of buy-to-let in action. The casual one-property landlord who fell into it when they could not sell a house is being replaced by deliberate, structured investors who treat property as a business, complete with corporate vehicles, professional accounting, and systematic deal analysis.

The concentration is also geographic. Corporate landlords are not buying in London at 6.1% yields when the North East offers 9.8%. They are deploying capital where the numbers work best, using data rather than proximity to make location decisions. A deal analysis tool that pulls regional yield data and stress-tests against current mortgage rates takes the guesswork out of this process. When you are making decisions with company money and filing company accounts, the rigour has to be there.

The practical steps if you are buying your next property through a company

If you have decided that a limited company is the right structure for your next purchase, here is what the process looks like in practice.

Incorporate an SPV with the right SIC codes. The standard codes for a buy-to-let SPV are 68100 (buying and selling of own real estate) and 68209 (other letting and operating of own or leased real estate). Your accountant or a company formation agent can set this up in 24 hours for under £50. Name it something sensible. "Your Name Properties Ltd" works fine.

Open a business bank account before you need it. This takes longer than you expect. Most high-street banks take two to four weeks to open a business account for a new SPV. Specialist BTL-friendly banks like Tide or Mettle are faster but may not suit every lender's requirements. Have the account open and ready before you start making mortgage applications.

Get a mortgage agreement in principle. Limited company BTL mortgages assess affordability differently from personal ones. Lenders look at the rental income coverage ratio (typically 145% at a stress rate of 5.5% to 6.5%) and your personal income as a backstop. Specialist BTL brokers like Commercial Trust, Moneyman, or John Charcol handle hundreds of limited company applications monthly and know which lenders suit which situations.

Set up your accounting software from day one. Cloud accounting platforms like Xero or FreeAgent connect to your business bank account via open banking and categorise transactions automatically. Your accountant can access the same platform, reducing year-end fees because the data is already clean. Starting with clean books is infinitely easier than trying to reconstruct them later.

The bottom line

The 80% figure is not a temporary spike. It is the new normal, driven by a tax system that increasingly rewards corporate ownership and penalises personal holding. The 2% rental income surcharge from April 2027 will push the remaining holdouts to reconsider. For new purchases by higher-rate taxpayers, the case for a limited company is close to unarguable in most scenarios. For existing portfolios, the transfer costs mean the decision is more nuanced and heavily dependent on your specific numbers.

The worst thing you can do is make this decision based on a podcast, a property forum, or a headline. Run the numbers with your actual figures. Model the scenarios. Factor in the extraction costs. And talk to a property-specialist accountant who understands both structures. The difference between the right and wrong structure over a 20-year holding period is not marginal. It is tens of thousands of pounds, and for larger portfolios, hundreds of thousands. Get it right at the start.