Buy-to-let mortgages have become increasingly popular among UK property investors in 2025, especially those operating through a limited company. One of the most common questions landlords ask is: how much deposit for a limited company buy to let mortgage is required? With changes to taxation, affordability criteria, and lender appetite, understanding the deposit requirements and how they fit into the broader lending landscape is essential for successful property investment. Limited company buy-to-let lending offers potential tax efficiencies, particularly for higher-rate taxpayers, and can be a strategic choice for portfolio landlords looking to grow. In today’s market, investment property finance through a limited company structure is often more accessible, with specialist lenders tailoring products to meet demand. However, this route comes with specific criteria, higher stress testing, and potentially larger deposits. This guide explores everything landlords need to know about securing a limited company landlord mortgage in 2025.
Quick Facts
– Interest rates: 5.5% to 7.2% (as of early 2025)
– Minimum deposit: 25% (some lenders may require 30%)
– Rental coverage: 125% to 145% at a stress rate of 5.5% or higher
– Maximum loan-to-value (LTV): 75%
– Typical arrangement fees: 1% to 2% of loan amount
– Application timeline: 4 to 8 weeks
Limited company buy-to-let mortgages typically require a higher deposit than residential loans, often starting at 25% of the property value. Lenders assess affordability based on projected rental income rather than personal income, applying a rental stress test to ensure the property can sustain repayments. Interest rates tend to be slightly higher than personal name mortgages, and arrangement fees can also be more substantial. However, the potential tax advantages and ability to grow a portfolio within a corporate structure make this route attractive for many investors.
How This Mortgage Works
A limited company buy-to-let mortgage is a specialist mortgage product designed for landlords purchasing or remortgaging investment properties through a limited company, often a Special Purpose Vehicle (SPV) registered with Companies House. Unlike residential mortgages, these loans are assessed primarily on the rental income generated by the property rather than the borrower’s personal income.
Mortgage types available include fixed-rate (typically 2 to 5 years), variable, and tracker options. Fixed rates offer stability, which is appealing in a rising interest rate environment, while trackers may offer lower initial rates but come with more risk.
This type of mortgage is ideal for experienced landlords, portfolio investors, and those seeking to mitigate tax liabilities. First-time landlords can also apply, provided they meet stricter criteria. Lenders are increasingly open to limited company lending, especially as more landlords incorporate due to Section 24 tax changes.
Compared to standard residential mortgages, limited company BTL mortgages involve more complex underwriting, higher fees, and stricter stress testing. However, they allow landlords to ring-fence liabilities and potentially benefit from more favourable tax treatment on profits retained within the company.
Eligibility and Criteria
Lenders apply specific criteria when assessing limited company buy-to-let mortgage applications, and these differ significantly from personal name applications.
Income Requirements: While personal income is not the primary factor, some lenders still require directors to meet a minimum income threshold, typically £25,000 to £30,000 annually. This reassures lenders of the applicant’s financial stability.
Rental Coverage Calculations: The primary affordability measure is the rental income, which must cover the mortgage payment by 125% to 145%, depending on the borrower’s tax band. Most lenders apply a stress rate of 5.5% or higher to ensure the rental income can support the loan even if interest rates rise.
Property Type Restrictions: Lenders prefer standard buy-to-let properties such as single-family homes and flats. HMOs (houses in multiple occupation), student lets, and multi-unit freehold blocks may be accepted but usually require specialist lenders and higher deposits.
Credit Score Expectations: A good credit history is essential. While some adverse credit may be accepted, most lenders require a clean credit file, especially for limited company applications.
Age Limits and Employment Status: Most lenders set a minimum age of 21 and a maximum age of 85 at the end of the mortgage term. Self-employed applicants are accepted, especially if they are directors of the SPV.
Portfolio Landlord Criteria: If you own four or more mortgaged properties, you’re classed as a portfolio landlord. Lenders will require a full breakdown of your portfolio, including rental income, outstanding mortgages, and property values. They may also assess your overall gearing and rental yield.
Limited Company vs Personal Name: Applying through a limited company often requires the company to be an SPV with SIC codes related to property letting or management. Directors and shareholders must provide personal guarantees, and lenders will assess their financial standing.
Right-to-Rent and Licensing: Properties must comply with right-to-rent checks and local licensing regulations. Non-compliance can lead to mortgage rejection or legal issues.
Costs and Affordability
The total cost of a limited company buy-to-let mortgage includes more than just the deposit. Key expenses include:
– Arrangement fees: Typically 1% to 2% of the loan amount, often added to the loan
– Valuation fees: £300 to £1,000 depending on property value
– Legal fees: £1,000 to £2,000, with limited company applications often incurring higher costs
– Broker fees: Some brokers charge 0.5% to 1% of the loan amount
Interest rates for limited company BTL mortgages are generally higher than personal name equivalents, ranging from 5.5% to 7.2% in 2025. Fixed rates offer predictable payments, while variable and tracker rates may be influenced by Bank of England base rate changes.
Rental income is assessed using stress testing, typically at 125% to 145% of the mortgage payment at a notional rate of 5.5% or higher. Section 24 tax changes mean that mortgage interest is no longer fully deductible for personal landlords, making limited company ownership more tax-efficient.
Landlord insurance and buildings insurance are mandatory, and some lenders may require additional cover such as rent guarantee or legal expenses insurance.
The Application Process
Securing a limited company buy-to-let mortgage involves several steps:
1. Research and Preparation: Identify suitable lenders or consult a mortgage broker who specialises in limited company BTL lending.
2. Company Setup: Ensure your limited company is registered as an SPV with appropriate SIC codes (e.g., 68209).
3. Mortgage Agreement in Principle: Obtain an AIP based on rental income and property value.
4. Submit Application: Provide company documents, director ID, proof of income, property details, and projected rental income.
5. Valuation and Survey: The lender arranges a property valuation to confirm market value and rental potential.
6. Underwriting and Offer: The lender assesses the application, including affordability and credit checks, before issuing a mortgage offer.
7. Legal Process: Solicitors handle due diligence, company structure checks, and legal documentation.
8. Completion: Funds are released, and the mortgage begins.
Applications typically take 4 to 8 weeks. Working with a broker can streamline the process, improve approval chances, and provide access to specialist lenders. Common reasons for rejection include insufficient rental income, poor credit history, or incorrect company structure.
Benefits, Risks and Alternatives
Benefits of limited company buy-to-let mortgages include potential tax savings, especially for higher-rate taxpayers, and the ability to retain profits within the company for reinvestment. Limited liability also protects personal assets, and lenders often allow more flexibility for portfolio expansion.
However, risks include higher interest rates, larger deposits, and increased administrative responsibilities. Void periods, rising interest rates, and changing regulations can also affect profitability. Additionally, lenders may require personal guarantees, exposing directors to some risk.
Alternative finance options include bridging loans for short-term purchases, commercial mortgages for mixed-use properties, and development finance for refurbishment or new builds. When your current deal ends, consider whether a remortgage or product transfer offers better value (Read our guide to remortgaging a buy-to-let property).
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 a limited company buy-to-let mortgage. Some specialist lenders may ask for 30%, especially for HMOs or non-standard properties. The required deposit depends on the loan-to-value (LTV) ratio, property type, and your overall financial profile. A higher deposit can improve your chances of approval and secure a better interest rate.
Can I get a buy-to-let mortgage through a limited company?
Yes, many UK lenders offer buy-to-let mortgages through limited companies, typically SPVs. This structure is increasingly popular due to tax advantages and portfolio flexibility. You’ll need to set up a company with the correct SIC code and provide personal guarantees as a director. Lenders assess the company and its directors when making lending decisions.
What rental coverage do lenders require?
Lenders require rental income to cover the mortgage payments by 125% to 145%, depending on your tax status and the lender’s policy. This is calculated using a stress rate, often 5.5% or higher, to ensure the property remains affordable if interest rates rise. For limited company applications, the lower tax rate may allow for a lower coverage threshold in some cases.
How does Section 24 tax affect buy-to-let mortgages?
Section 24 restricts mortgage interest relief for landlords operating in their personal name. This means higher-rate taxpayers can no longer deduct mortgage interest from rental income, increasing their tax liability. Limited companies are exempt from Section 24, allowing full deduction of mortgage interest as a business expense, which is why many landlords choose to incorporate.
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 mortgages are strictly for investment purposes, and lenders prohibit owner-occupation. Living