Is a limited company buy to let mortgage better for tax? This is one of the most common questions UK landlords ask when exploring investment property finance. With changes to taxation rules and stricter affordability checks, many investors are turning to limited company structures to optimise their buy-to-let lending strategy. A limited company buy-to-let mortgage is designed for landlords who purchase or hold rental properties through a registered company rather than in their personal name.
This approach can offer significant tax advantages, particularly for higher-rate taxpayers affected by Section 24 mortgage interest relief changes. In 2025, with increasing regulation and rising BTL mortgage rates, landlords are seeking more efficient ways to manage their portfolios. Limited company mortgages can help mitigate tax liabilities, improve affordability calculations, and support long-term investment goals. However, they come with different criteria, interest rates, and legal responsibilities compared to traditional landlord mortgage options.
Quick Facts
– Interest rates: 5.5% to 7.5% for limited company BTLs
– Minimum deposit: 25% (some lenders may require 30%)
– Rental coverage: Typically 125% to 145% at 5.5% stress rate
– Maximum loan-to-value (LTV): Up to 75%
– Arrangement fees: Usually 1% to 2% of the loan amount
– Application timeline: 4 to 8 weeks from submission to completion
Limited company buy-to-let mortgages often have slightly higher interest rates than personal name products, but the tax savings can outweigh the cost. Lenders assess affordability based on projected rental income, and portfolio landlords may benefit from streamlined underwriting if their properties are held in a company structure.
How This Mortgage Works
A limited company buy-to-let mortgage works by allowing landlords to purchase or refinance rental properties through a special purpose vehicle (SPV) – a limited company typically set up solely for property investment. The mortgage is held in the company’s name, and the lender assesses the company’s financials, directors’ experience, and expected rental income.
Product types include fixed-rate, tracker, and variable mortgages. Fixed-rate deals are popular for stability, especially amid interest rate fluctuations expected in 2025. Tracker products follow the Bank of England base rate and may suit investors expecting rates to fall.
This mortgage structure is ideal for higher-rate taxpayers, portfolio landlords managing multiple properties, and those planning long-term investment strategies. It also suits landlords who want to retain profits within the company for reinvestment or pension planning.
Unlike residential mortgages, these products are not regulated by the FCA unless the borrower or tenant is a close family member. Lenders apply commercial underwriting, focusing on rental yield and company structure rather than personal income alone. As buy-to-let lending evolves, more lenders are entering the limited company space, increasing competition and product choice.
Eligibility and Criteria
Lenders apply specific eligibility criteria for limited company buy-to-let mortgages. While personal income is less critical than for residential lending, some lenders still require directors to meet minimum income thresholds, typically £25,000 to £30,000 annually, to demonstrate financial stability.
Rental income is the primary affordability metric. Most lenders require the rental coverage ratio to be between 125% and 145% of the mortgage payment, stress-tested at an interest rate of 5.5% or higher. Some lenders offer lower stress rates for five-year fixed products, improving affordability.
Property type also matters. Standard buy-to-let properties like single-family homes and flats are widely accepted, but HMOs, student lets, and new builds may face stricter criteria. Flats above commercial premises or properties with non-standard construction may be excluded.
Credit score expectations vary, but most lenders require a clean credit history with no recent CCJs or defaults. Some specialist lenders may accept minor adverse credit at higher rates.
Age limits typically range from 21 to 85 at the end of the mortgage term. Self-employed and employed applicants are both accepted, and lenders will assess the experience of the directors, especially for portfolio landlords.
For portfolio landlords (those with four or more mortgaged properties), lenders may require a full portfolio schedule, business plan, and evidence of rental income across the portfolio. They will assess the overall gearing and rental coverage of the entire portfolio.
Applications in a limited company name require the company to be registered with Companies House, usually as an SPV with SIC code 68209 (letting and operating of own or leased real estate). Directors must pass background checks, and the company must comply with right-to-rent regulations and local licensing, especially in selective licensing areas.
Costs and Affordability
Limited company buy-to-let mortgages come with various costs. Arrangement fees are typically 1% to 2% of the loan, often added to the mortgage. Valuation fees vary based on property value, while legal fees are usually higher than residential purchases due to the complexity of company structures.
Interest rates for limited company BTLs are generally 0.5% to 1% higher than personal name equivalents. However, many landlords find the tax savings compensate for the higher cost. Fixed-rate products are popular in 2025 due to interest rate uncertainty.
Rental income is used to calculate affordability, with lenders applying a stress test to ensure the property generates sufficient income to cover repayments. Taxation plays a key role: under Section 24, individual landlords can no longer deduct mortgage interest from rental income, but limited companies can still treat interest as a business expense, reducing corporation tax liabilities.
Landlords must also budget for insurance, including buildings insurance and specialist landlord insurance. Lenders may also apply stress testing at higher notional rates to ensure resilience against future rate increases.
The Application Process
Applying for a limited company buy-to-let mortgage involves several steps. First, research lenders and products, ideally with the help of a specialist mortgage broker who understands limited company lending.
Next, prepare documentation, including proof of identity, proof of address, company registration documents, business bank statements, and projected rental income. Directors may also need to provide personal income details and credit reports.
The lender will instruct a property valuation, which may be a physical inspection or desktop assessment. Legal work is more complex than standard purchases, as solicitors must review the company structure, director responsibilities, and lender requirements.
Applications typically take 4 to 8 weeks to complete, depending on the lender, valuation, and legal process. Working with a broker can speed up the process and reduce the risk of errors or delays.
Common reasons for rejection include insufficient rental income, poor credit history, incorrect company structure, or lack of experience. Ensuring the company has the correct SIC code and that all directors pass background checks is essential.
Benefits, Risks and Alternatives
The main benefit of a limited company buy-to-let mortgage is tax efficiency. Mortgage interest remains fully deductible as a business expense, unlike in personal name ownership. This can significantly reduce tax bills for higher-rate taxpayers.
Other benefits include improved portfolio management, easier profit retention for reinvestment, and potential inheritance tax planning advantages. However, risks include higher interest rates, more complex legal and accounting requirements, and exposure to changes in tax or lending regulations.
Void periods, rising interest rates, and increased regulation (such as EPC requirements and licensing) can affect profitability. Landlords should also consider alternatives such as bridging loans for short-term finance, commercial mortgages for mixed-use properties, or development finance for refurbishment projects.
Remortgaging from a personal name to a limited company involves a sale to the company, triggering stamp duty and potential capital gains tax. In some cases, a product transfer may be more cost-effective (Read our guide to remortgaging to a limited company).
Frequently Asked Questions
What deposit do I need for a limited company buy-to-let mortgage?
Most lenders require a minimum deposit of 25% for limited company buy-to-let mortgages. However, for higher-risk properties or less experienced landlords, some lenders may ask for 30% or more. A larger deposit can improve your loan-to-value ratio, unlock better interest rates, and increase your chances of approval.
Can I get a limited company buy-to-let mortgage through a limited company?
Yes, you can obtain a buy-to-let mortgage through a limited company, typically set up as a special purpose vehicle (SPV). The company must be registered with Companies House and have the correct SIC code (usually 68209). Lenders will assess the company’s structure, rental income, and the directors’ experience and creditworthiness.
What rental coverage do lenders require?
Lenders usually require rental income to cover between 125% and 145% of the mortgage payment, stress-tested at an interest rate of 5.5% or higher. For five-year fixed-rate products, some lenders use a lower stress rate, improving affordability. Portfolio landlords may face additional stress testing on their entire portfolio.
How does Section 24 tax affect buy-to-let mortgages?
Section 24 of the Finance Act 2015 phased out mortgage interest relief for individual landlords. As of 2020, landlords can no longer deduct mortgage interest from rental income and instead receive a basic rate tax credit. This significantly impacts higher-rate taxpayers. Limited companies are exempt from Section 24, making this structure more tax-efficient for many.
Can I live in a property with a limited company buy-to-let mortgage?
No, you cannot live in a property financed with a limited company buy-to-let mortgage. These products are strictly for investment purposes, and lenders prohibit owner-occupation. If you intend to live in the property, you must apply for a regulated residential mortgage instead.
What credit score do I need for a buy-to-let mortgage?
While there’s no fixed minimum credit score, most lenders expect a good credit history with no recent CCJs, defaults, or missed payments. Specialist lenders may consider applicants with minor adverse credit, but the interest rates will be higher. A clean credit profile improves your chances of approval and access to better rates.
Key Takeaways
Limited company buy-to-let mortgages offer significant tax advantages for landlords, especially those affected by Section 24. In 2025, with rising interest rates and stricter affordability rules, many investors are