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-
Personal vs SPV Company Tax Treatment
| Factor | Personal | Ltd Company (SPV) |
|---|---|---|
| Mortgage interest relief | 20% tax credit only | Full deduction |
| Tax rate on profit | 20%-45% (income tax) | 25% (corporation tax) |
| Mortgage rates | Lower | 0.5-1% higher |
| CGT on sale | 18%/24% | 25% Corp Tax + extraction |
| Accountancy costs | Lower | £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.