Limited Company Mortgage Calculator UK

Calculate SPV mortgage costs for buy-to-let landlords. Compare personal ownership vs limited company structure with corporation tax benefits for 2025/26.

Limited Company Mortgage Calculator

Personal vs Limited Company Comparison

Monthly Mortgage Payment-
Annual Rental Profit (before tax)-
Tax as Personal (Section 24 restricted)-
Tax via Ltd Company (Corp Tax 25%)-
Annual Tax Saving via Ltd Co-
MB
Mustafa Bilgic Property Finance Specialist โ€” Updated April 2026
SPV MortgageBuy-to-Let2025/26

Personal vs SPV Company Tax Treatment

FactorPersonalLtd Company (SPV)
Mortgage interest relief20% tax credit onlyFull deduction
Tax rate on profit20%-45% (income tax)25% (corporation tax)
Mortgage ratesLower0.5-1% higher
CGT on sale18%/24%25% Corp Tax + extraction
Accountancy costsLower£500-£1,500/year

Key SPV Mortgage Facts

Corp Tax Rate
25%
Max LTV (SPV)
75%
Rate Premium
+0.5-1%
Interest Relief
100%
Stamp Duty
+3% surcharge
Annual Accounts
Required

How to Use This Calculator

1

Enter loan details

Input the mortgage amount, property value and interest rate.

2

Add income information

Your income determines affordability and borrowing capacity.

3

Select relevant options

Choose the mortgage type and any additional features.

4

Review monthly payments

See your estimated monthly payment and total interest costs.

5

Compare options

Use the comparison to decide the best approach for your situation.

Frequently Asked Questions

Should I buy property through a limited company?
For higher rate taxpayers with buy-to-let properties, a limited company structure can be more tax efficient. The company pays corporation tax at 25% rather than 40-45% income tax, and mortgage interest is fully deductible. However, company mortgages have higher rates, and extracting profits attracts additional tax.
What is an SPV?
A Special Purpose Vehicle is a limited company set up solely for property investment. Most BTL company mortgages require an SPV with a specific SIC code (68100 or 68209). The SPV holds the property and the mortgage, keeping property investment separate from any trading business.
Is Section 24 the main reason to use a company?
Section 24 removed the ability for individual landlords to deduct mortgage interest from rental income. Instead, they receive a basic rate (20%) tax credit. Higher rate taxpayers are significantly affected. A limited company is not subject to Section 24, so mortgage interest is fully deductible against rental profits.
What are the downsides of a company?
Higher mortgage rates (typically 0.5-1% more), additional accountancy costs (500-1,500 per year), no personal CGT annual exemption, difficulty extracting profits tax-efficiently, 3% stamp duty surcharge, and more administrative burden. For basic rate taxpayers with one or two properties, personal ownership may still be better.
Can I transfer existing properties to a company?
Yes, but this triggers stamp duty on the transfer (including the 3% surcharge) and CGT on any gain. The cost can be significant. Its generally more tax efficient to purchase new properties through a company while keeping existing ones personally, unless the long-term tax savings justify the transfer costs.

Official Sources & References

Data verified against official UK government sources. Last checked April 2026.