Quick Summary
Limited company buy-to-let structures can deliver significantly higher retained returns than individual ownership, mainly due to the ability to deduct mortgage interest in full.
• Company structures offer stronger retained income: HMRC data highlights a widening gap between individual and limited company landlords as finance costs continue to rise
• Individual landlords face higher tax pressure: Unincorporated landlords reported £58.99 billion in rental income against £34.75 billion in allowable expenses, retaining just 33p of every £1 collected before tax
• Section 24 creates a major difference: Individual landlords receive only a 20% tax credit on mortgage interest, while limited companies can deduct interest as a business expense
• Retained returns can be nearly three times higher: On the same leveraged property, a higher-rate individual landlord retains around £1,851 after tax, compared with approximately £5,100 through a limited company
• Professional investors gain a structural advantage: Limited company ownership can improve net rental income and support long-term buy-to-let strategies, especially in a higher interest rate environment
HMRC’s latest rental income statistics highlight a widening performance gap between individual and limited company landlords. While rising costs affect all owners, the tax treatment of finance costs creates a materially different outcome for professionally structured investors.
Unincorporated landlords reported £58.99 billion in rental income in 2024/25 against £34.75 billion in allowable expenses. Expenses now represent 58.9% of income, up from 47.8% five years earlier. The average landlord declared pre-tax profit of £6,800, retaining just 33p of every £1 collected before tax.
Finance costs remain the dominant expense. Residential mortgage interest totalled £12.82 billion, or 37% of all landlord deductions. Under Section 24, individual landlords receive only a 20% tax credit on interest, whereas limited companies continue to deduct interest in full.
On an identical leveraged property generating £20,500 rental income and £11,148 mortgage interest, both structures produce the same £6,800 cash profit. After tax, however, outcomes diverge sharply. A higher-rate individual landlord retains approximately £1,851, while a limited company retains approximately £ 5,100, nearly three times more.
This advantage stems solely from the ability to treat mortgage interest as a deductible business expense. Both ownership types face identical operating costs, regulatory requirements and EPC upgrade obligations. The distinction lies in how borrowing costs are treated for tax purposes.
As interest rates remain elevated relative to the previous decade, the tax efficiency of limited company ownership is becoming an increasingly important determinant of net returns. Professional investors with long-term hold strategies are well positioned to benefit from this structural difference.
Investor takeaway
Limited company structures provide a durable, rules-based advantage in net rental income that is independent of property location or rental growth. Well-capitalised investors incorporating or acquiring through companies can materially improve retained returns on the same assets.