Limited Company Buy-to-Let Hits Record 43%: Why Incorporation Is Now the Default Landlord Strategy

A structural transformation has taken hold in the UK buy-to-let market. According to new data from Paragon Bank, limited companies accounted for 43% of all mortgaged buy-to-let house purchases in 2025 — a record high, and a figure that would have seemed unthinkable just a decade ago. For property investors, this is no longer a niche tax planning tactic. It has become the dominant method of acquiring investment property in the UK.

The Numbers Behind the Shift

Paragon's analysis of industry-wide mortgage data shows limited company buy-to-let purchases have risen from 7.5% of completions in 2018 to 35% in 2024, reaching 43% in 2025. That trajectory — near-vertical over seven years — tells a clear story about how the landlord community has responded to a hostile tax environment.

Remortgages tell a similar story. Limited company landlords accounted for 11.5% of BTL remortgage completions in 2025, up from 10% in 2024 and just 1.3% in 2018. While purchases dominate the headline figure, the growing share of remortgages through limited companies indicates that even existing personal-name portfolios are being restructured.

The corporate formation data is equally striking. Companies House recorded 49,029 new companies incorporated under the primary SIC code used by landlords — buying and selling own real estate — in 2025, up from 45,775 in 2024. There are now 274,315 active businesses registered under this code in England and Wales, more than the entire hospitality sector.

What Drove the Incorporation Surge

The pivot to limited companies traces directly back to the 2017 changes to mortgage interest tax relief, introduced under Section 24 of the Finance Act 2015 and fully phased in by April 2020. Before April 2017, landlords holding property personally could deduct mortgage interest from rental income before calculating their tax liability. That allowance was replaced with a flat 20% tax credit — meaning higher-rate and additional-rate taxpayers were suddenly taxed on gross rental income, not net profit.

For a landlord paying 40% or 45% income tax, the impact was severe. Many saw their effective tax rate on rental profits double overnight, with some reporting negative post-tax cash flows on properties that had previously been profitable. Incorporation offered a route out: limited companies pay corporation tax — currently 19% to 25% depending on profit size — and can deduct mortgage interest as a business expense in full.

The logic has only strengthened as base rates have remained elevated. With many landlords carrying mortgages at 5% or above, the inability to deduct finance costs personally has made incorporation not just advantageous but, for many, financially necessary to remain viable.

What This Means for Property Investors

For investors already operating through a limited company, the data is validating. You are now on the same side of the ledger as nearly half the mortgaged BTL market, with access to a growing range of lenders who have built dedicated limited company product ranges. Competition among lenders for corporate landlord business has intensified, which has helped compress the rate premium that once existed between personal-name and limited company mortgages.

For investors still holding property personally — particularly those with three or more properties — the data should prompt a structured review. Transferring existing properties from personal ownership to a limited company triggers Stamp Duty Land Tax and potentially Capital Gains Tax on disposal, so incorporation must be modelled carefully for existing portfolios. However, for new acquisitions, the calculus is increasingly straightforward: buy inside the company from the outset.

Title splitting strategies, in particular, are well-suited to the limited company model. Where an investor acquires a multi-unit freehold block and splits the title into individual leaseholds, the capital uplift — and any refinancing proceeds — can be retained within the company and recycled into the next acquisition. Extraction of profits can then be managed tax-efficiently through salary, dividends, or retained earnings, depending on personal circumstances.

A Paragon survey of over 500 landlords found that 29% now hold all properties exclusively through limited companies, with a further 36% splitting ownership between corporate and personal names. That means 65% of landlords have established at least one Special Purpose Vehicle for their portfolio. The SPV has moved from a sophisticated planning tool to standard practice.

The Trend Has Further to Run

Louisa Sedgwick, Paragon Bank's Managing Director of Mortgages, said the record share "underlines how deeply this trend is now embedded in the sector" and that incorporation is expected to continue growing. With the April 2027 income tax changes set to push the effective marginal rate on rental income above 47% for higher earners — as covered previously on this site — the financial case for corporate ownership of property will become even more pronounced.

For investors building portfolios now, the question is no longer whether to incorporate. It is how to structure the company, which lenders to use, and how to plan for long-term capital extraction. Getting that framework right at the point of first acquisition is significantly easier — and cheaper — than trying to restructure a personal portfolio later.