Buy-to-Let: Personal Name vs Limited Company SPV

1. What Changed: The Section 24 Mortgage Interest Trap

Prior to April 2017, individual property landlords could deduct 100% of their mortgage interest payments and finance costs from their rental income before calculating Income Tax. If you collected £20,000 in rent and paid £12,000 in mortgage interest, you were taxed solely on your £8,000 net profit.

Under Section 24 of the Finance (No. 2) Act 2015 (phased in fully by 2020), this deduction was completely abolished for individual landlords. Landlords are now taxed on their gross rental turnover minus non-financial operating expenses, receiving only a restricted 20% basic rate tax credit against their mortgage interest.

The Phantom Profit Nightmare for Higher-Rate Taxpayers:

Consider a property generating £30,000 rent with £24,000 mortgage interest:

Actual Cash Profit: £6,000 (£30k rent - £24k interest).
Personal Tax Bill (40% Taxpayer): Tax is assessed on £30,000 at 40% (£12,000) minus 20% basic rate credit on interest (£4,800) = £7,200 Tax.
Result: A net cash loss of -£1,200 despite generating £6,000 in cash profit!

2. How an SPV Limited Company Protects Profits

Section 24 applies exclusively to individuals. Limited Companies are completely exempt.

When an investment property is owned by a corporate body (such as an SPV Limited Company):

100% Interest Deductibility: Mortgage interest is categorised as a standard business expenditure and deducted in full from rental turnover before Corporation Tax is applied.
Corporation Tax Rates: Companies pay Corporation Tax at 19% on profits under £50,000, scaling to a maximum of 25% on profits over £250,000—drastically lower than the 40% higher rate or 45% additional rate individual income tax bands.
Using the Same Example in an SPV: On the £6,000 net profit, the SPV pays 19% Corporation Tax = £1,140, leaving £4,860 clean retained earnings.

3. Borrowing Capacity: ICR Stress Testing Differences

The Bank of England Prudential Regulation Authority (PRA) enforces strict Interest Cover Ratio (ICR) rules on buy-to-let lending. Because personal landlords face higher tax liabilities, lenders stress-test personal applications far more severely:

Personal Name Stress Test

Higher tax leakage forces lenders to require high rental cushions:

ICR typically 145% to 160%
Stress rate of 5.5% to 8.5%
Caps maximum loan amount

Limited Company (SPV) Stress Test

Lower corporate tax liability unlocks greater borrowing power:

ICR typically just 125%
Calculated at pay rate on 5-year fixes
Borrow up to 25-35% more capital

4. Head-to-Head Comparison: Personal Name vs Limited Company

Evaluation Factor	Personal Name	SPV Limited Company	Advantage
Mortgage Interest Tax Relief	Restricted to 20% basic rate tax credit (Section 24). Higher-rate taxpayers pay tax on turnover, not net profit.	100% fully deductible as a legitimate business operating expense before Corporation Tax calculation.	Limited Company
Tax Rates on Net Profit	Income Tax at 20% (basic), 40% (higher), or 45% (additional rate). Can push other income into higher bands.	Corporation Tax at 19% (small profits up to £50k) scaling to 25% (main rate above £250k).	Limited Company
Lender ICR Stress Testing	Stricter stress testing: typically 145% to 160% coverage at a deemed interest rate of 5.5% to 8.5%.	More lenient stress testing: typically 125% coverage at pay rate or 5.5%, allowing higher maximum borrowing.	Limited Company
Portfolio Reinvestment	Surplus rental income is taxed at individual rates before it can be reinvested into new property purchases.	Retained post-tax profits accumulate within the company and can be reinvested without personal tax leakage.	Limited Company
Mortgage Product Interest Rates	Historically slightly lower headline mortgage rates from mass-market retail high street lenders.	Specialist commercial rates (traditionally 0.3% - 0.75% higher, though the margin has narrowed significantly).	Personal Name
Annual Running Costs	Simple annual Self Assessment tax return. Lower accountancy fees.	Companies House filing, confirmation statements, statutory annual corporate accounts, and CT600 tax returns.	Personal Name

5. Profit Extraction, Retained Earnings & Estate Planning

Operating through an SPV provides significant flexibility for building long-term wealth:

Rapid Portfolio Compounding: If you do not need rental profits for everyday living expenses, retaining profits within the company avoids personal dividend tax entirely. Profits can be used directly as deposits on subsequent property acquisitions or HMO multi-unit conversions.
Intercompany Lending: An active trading business can lend surplus profits directly to a property SPV via a formal intercompany loan, avoiding personal tax on director dividends.
Inheritance Tax (IHT) & Succession: Transferring shares in a Limited Company to family members or establishing freezer shares and family investment trusts (FICs) is significantly simpler and more tax-efficient than transferring physical property deeds.
Director Loan Repayments: Initial capital loaned by directors to fund property purchases can be drawn back out of the company tax-free as director loan repayments before dividends are declared.

6. Incorporating an Existing Portfolio: Costs & Reliefs

If you already own an established portfolio in your personal name, moving it into an SPV requires careful analysis. See how other investors structured their transitions in our completed portfolio case studies:

Stamp Duty Land Tax (SDLT)

The company must pay SDLT on the open market value of the residential properties being transferred, including the 5% Higher Rates for Additional Dwellings (HRAD) surcharge applied to corporate residential purchases. Model commercial vs residential tax tiers with our Commercial Stamp Duty Calculator.

Capital Gains Tax (CGT) & Section 162 Relief

Transferring property triggers CGT on historical gains. However, under Section 162 Incorporation Relief, if the landlord operates a genuine property business (investing substantial personal time and management), the capital gains can be rolled over into shares in the new company, deferring the CGT bill entirely.

Partnership Incorporation (Schedule 15 FA 2003)

Where a portfolio is operated as a genuine commercial partnership, Schedule 15 provisions can sometimes reduce the SDLT liability on transfer to zero. Specialist tax advice is mandatory.

7. Frequently Asked Questions

What is an SPV and why do lenders prefer them?

A Special Purpose Vehicle (SPV) is a private limited company set up solely for buying, holding, and letting property assets, with specific SIC codes (such as 68100 or 68209). Lenders prefer SPVs because they have no trading liabilities, no employees, and no exposure to general commercial trading risks, simplifying underwriting and security.

Can I transfer my existing personal properties into a Limited Company?

Yes, but it is treated legally as a sale from yourself to your company. This triggers Stamp Duty Land Tax (SDLT) at higher residential rates and potential Capital Gains Tax (CGT). For substantial property businesses, Section 162 Incorporation Relief and Partnership provisions may defer or eliminate CGT and SDLT; consultation with a qualified tax advisor is essential.

Do limited company directors need to give personal guarantees?

Yes. Almost all UK commercial mortgage and BTL lenders require personal guarantees from all directors and shareholders holding a 20% to 25%+ equity stake in the company. Lenders will assess personal credit history alongside the property cash flow.

Which SIC codes should my Limited Company use?

The standard SIC codes accepted by UK commercial mortgage lenders are: 68100 (Buying and selling of own real estate), 68209 (Other letting and operating of own or leased real estate), 68320 (Management of real estate on a fee or contract basis), and 68201 (Rent or operating of Housing Association real estate).

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Buy-to-Let vs Limited Company Mortgages: Which is Better for UK Investors?

The Core Verdict for 2026:

In This Guide: