Limited company buy to let mortgage articles of association are a critical component when securing investment property finance through a corporate structure. As more landlords shift from personal ownership to limited companies for tax efficiency and portfolio growth, understanding how your company’s articles of association impact mortgage eligibility is essential. These legal documents outline the rules governing your company’s operations and must align with lender requirements for buy-to-let lending. In 2025, with tighter regulations, evolving taxation policies, and rising interest rates, lenders are scrutinising company structures more closely than ever.
Landlords are increasingly using limited companies to mitigate the effects of Section 24 tax changes, access improved affordability calculations, and scale their portfolios more efficiently. However, not all lenders accept every company setup, and unsuitable articles of association can lead to mortgage rejection. Whether you’re a first-time investor or an experienced portfolio landlord, aligning your company documents with lender expectations is key to securing competitive BTL mortgage rates and growing your property business sustainably.
Quick Facts
– Interest rates: 5.2% to 6.8% (2025 average for limited company BTL)
– Minimum deposit: 25% (some lenders may require 30%)
– Rental coverage: 125% to 145% at 5.5% stress rate
– Maximum loan-to-value (LTV): 75%
– Arrangement fees: Typically 1-2% of the loan amount
– Application timeline: 4 to 8 weeks from submission to completion
Limited company buy-to-let mortgages tend to have higher interest rates than personal name equivalents, but offer significant tax advantages. Lenders require that your articles of association clearly permit property letting and mortgage borrowing. Ensuring your company structure is lender-compliant can speed up approvals and reduce legal costs.
How This Mortgage Works
A limited company buy to let mortgage allows landlords to purchase or remortgage investment properties through a corporate entity, typically a Special Purpose Vehicle (SPV). This structure is popular among landlords seeking to mitigate personal tax liabilities and scale their portfolios. The articles of association are a legal document that governs the company’s operations and must explicitly permit property letting and borrowing.
There are various mortgage product types available, including fixed-rate, variable, and tracker options. Fixed-rate deals are currently the most popular due to interest rate volatility in 2025. Lenders assess the company’s financials, but also the directors’ experience and creditworthiness.
This mortgage type suits landlords with multiple properties, those impacted by Section 24 tax restrictions, and investors planning long-term portfolio growth. Lenders are generally more cautious with limited company applications, but the market has matured significantly, with growing lender appetite and competitive BTL mortgage rates. Compared to residential mortgages, affordability is based on projected rental income rather than personal income, although directors’ guarantees are often required.
Eligibility and Criteria
Lenders apply specific criteria for limited company buy to let mortgage applications, and your company’s articles of association must meet their standards. Here’s what you need to know:
Income Requirements:
While personal income isn’t the primary affordability metric, many lenders require directors to have a minimum income (typically £25,000+) to demonstrate financial stability. However, some specialist lenders accept lower income thresholds if rental income is strong.
Rental Coverage and Stress Testing:
Affordability is assessed using a rental coverage ratio, usually between 125% and 145% of the mortgage payment, stressed at an interest rate of 5.5% or higher. For limited companies, the lower corporation tax rate allows for slightly more generous affordability assessments compared to individual applications.
Property Type Restrictions:
Most lenders prefer standard residential properties. HMOs (houses in multiple occupation), flats above commercial premises, and holiday lets may be acceptable but often come with stricter criteria and higher rates. The property must be lettable and meet minimum valuation thresholds.
Credit Score and Background:
Directors must typically have a clean credit history. Minor issues may be accepted by specialist lenders, but defaults, CCJs, or recent bankruptcies can be problematic. A strong credit profile improves access to better rates.
Age and Employment:
Applicants must usually be aged 21-85 at the end of the mortgage term. Employment status matters less than rental income, but self-employed directors may need to provide additional documentation.
Portfolio Landlord Criteria:
If you own four or more mortgaged properties, you’re considered a portfolio landlord. Lenders will assess your entire portfolio’s performance, including rental income, LTV, and property types. A detailed business plan and cash flow forecast may be required (Read our guide to portfolio landlord mortgages).
Limited Company vs Personal Name:
Limited company applications are assessed differently from personal buy-to-let mortgages. The lender underwrites the company and its directors. SPVs with SIC code 68209 (letting and operating of own or leased real estate) are preferred. Your articles of association must reflect this purpose.
Right-to-Rent and Licensing:
Landlords must comply with Right-to-Rent checks and local authority licensing schemes. Failure to meet these legal obligations can result in mortgage refusal or legal penalties.
Costs and Affordability
Limited company buy to let mortgages involve several costs beyond the deposit. Understanding these is vital for affordability planning:
– Arrangement Fees: Typically 1-2% of the loan amount, sometimes added to the mortgage.
– Valuation Fees: £300 to £800 depending on property value.
– Legal Fees: £1,000+ for limited company applications due to more complex conveyancing.
– Broker Fees: £500 to £2,000 depending on the adviser and complexity.
Interest rates for limited company mortgages are generally 0.5% to 1% higher than personal BTL rates. Fixed rates offer stability, while variable and tracker options may be cheaper initially but carry risk in a rising rate environment.
Rental income is the primary affordability metric. Most lenders require 125-145% coverage at a stressed rate. Section 24 no longer allows individual landlords to deduct mortgage interest fully, but limited companies can still claim it as a business expense, improving net returns.
Insurance is mandatory – landlords must have buildings insurance, and many lenders require landlord-specific cover, including rent guarantee or liability protection.
The Application Process
Applying for a limited company buy to let mortgage involves several steps:
1. Research and Pre-Approval:
Speak to a mortgage adviser to assess your eligibility. Ensure your company’s articles of association are lender-compliant. Obtain a decision in principle (DIP).
2. Prepare Documentation:
You’ll need proof of ID, company registration documents, articles of association, SIC code confirmation, business bank statements, personal income evidence, and projected rental income from a letting agent.
3. Submit Application:
Your broker or lender submits the full application. The lender assesses the company structure, directors, and property.
4. Property Valuation:
A surveyor inspects the property to confirm its value and rental potential. This can take 1-2 weeks.
5. Legal Work:
Solicitors handle conveyancing, check company structure, and ensure the mortgage deed is correctly executed. Limited company transactions take longer due to added complexity.
6. Completion:
Once all checks are complete and funds are released, you can complete the purchase or remortgage.
Working with a broker is advisable, especially for limited company applications, as they can navigate lender criteria and ensure your documentation is aligned. Common reasons for rejection include unsuitable articles of association, poor credit, or insufficient rental income.
Benefits, Risks and Alternatives
Benefits of limited company buy to let mortgage articles of association include full mortgage interest relief, lower corporation tax rates, and easier portfolio expansion. Properties held in a company structure can also offer estate planning advantages and separate personal liability.
However, risks include:
– Higher interest rates and fees
– More complex legal and tax requirements
– Potential void periods affecting cash flow
– Regulatory changes impacting company structures
Alternatives to limited company BTL mortgages include:
– Bridging loans for short-term purchases or refurbishments
– Commercial mortgages for mixed-use or semi-commercial properties
– Development finance for ground-up projects
If you’re already in a fixed deal, consider whether a remortgage or product transfer offers better value, especially if your company’s structure has changed (Read our guide to remortgaging a buy-to-let property).
Frequently Asked Questions
What deposit do I need for a 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 inexperienced landlords, some lenders may ask for 30% or more. A larger deposit can also help secure better interest rates and improve affordability calculations.
Can I get limited company buy to let mortgage articles of association through a limited company?
Yes, but your limited company must be correctly structured. Most lenders prefer SPVs with the appropriate SIC code (e.g. 68209). Your articles of association must explicitly allow property letting and mortgage borrowing. If not, they may need to be amended before proceeding with a mortgage application.
What rental coverage do lenders require?
Lenders typically require a rental coverage ratio of 125% to 145% of the mortgage payment, stressed at an interest rate of around 5.5%. For limited companies, the lower corporation tax rate allows for slightly more generous affordability calculations compared to personal applications.
How does Section 24 tax affect buy-to-let mortgages?
Section 24 restricts individual landlords from deducting mortgage interest from rental income, increasing their tax liability. Limited companies are exempt from this rule, allowing full interest relief as a business expense. This makes limited company structures more tax-efficient for higher-rate taxpayers.
Can I live in a property with limited company buy to let mortgage articles of association?
No, you cannot live in a property financed with a limited company buy-to-let mortgage. These mortgages are strictly for investment purposes. Living in the property would breach the mortgage terms and could lead to repossession or legal action. If you intend to live in the property, you need a residential mortgage.
What credit score do I need for a buy-to-let mortgage?
There’s no fixed score, but most lenders expect a good to excellent credit