Limited company buy to let mortgage accountant letter 2 year fixed is a specialist mortgage product designed for landlords purchasing or remortgaging rental properties through a limited company structure. It typically involves a fixed interest rate for two years and often requires an accountant’s letter to verify company income and financial stability. In 2025, this type of buy-to-let lending continues to attract property investors due to its tax efficiency and flexibility for portfolio landlords. With rising interest rates and tighter affordability criteria, a two-year fixed product offers short-term rate security while allowing investors to reassess their strategy in the near future. This mortgage type is especially relevant for those navigating Section 24 tax changes, as holding property in a limited company can mitigate some of the tax burdens. Whether you’re expanding your investment property finance portfolio or seeking a landlord mortgage for your first buy-to-let, understanding the structure, criteria, and benefits of this mortgage is key to making informed decisions.
Quick Facts
– Interest rates: 4.5% to 6.5% (as of early 2025)
– Minimum deposit: 25%
– Rental coverage: 125% to 145% of mortgage payments (at a stress-tested rate)
– Maximum loan-to-value (LTV): Typically 75%
– Arrangement fees: £995 to 2% of the loan amount
– Application timeline: 4 to 8 weeks from submission to completion
Limited company buy-to-let mortgages are designed for landlords using a special purpose vehicle (SPV) limited company. These products often include a requirement for an accountant’s letter to verify the company’s trading history and financial viability. A two-year fixed rate provides short-term certainty, ideal for investors wanting flexibility to remortgage or adjust their strategy as market conditions evolve.
How This Mortgage Works
A limited company buy to let mortgage accountant letter 2 year fixed works by offering a fixed interest rate for two years on a buy-to-let property purchased through a limited company. The accountant’s letter serves as proof of the company’s income, especially when the company is newly formed or has limited trading history. This letter is often a key part of the underwriting process, helping lenders assess affordability and financial stability.
These mortgages are typically interest-only, meaning monthly payments cover only the interest, not the capital. After the two-year fixed period, the mortgage reverts to the lender’s standard variable rate unless you remortgage or switch products. Product types include fixed, tracker, and variable rates, but fixed-rate options are popular for their predictability.
This mortgage suits a range of investors, including first-time landlords setting up an SPV, experienced portfolio landlords managing multiple properties, and those seeking tax efficiency through a limited company. In 2025, lender appetite remains strong for limited company lending, though criteria have tightened due to regulatory oversight. Compared to residential mortgages, these products focus on rental income rather than personal income, and affordability is assessed differently.
Eligibility and Criteria
To qualify for a limited company buy to let mortgage accountant letter 2 year fixed, applicants must meet specific lender criteria. While personal income is less critical than in residential lending, some lenders still require a minimum personal income, typically around £25,000, especially for first-time landlords. However, many lenders focus primarily on rental income and the financials of the limited company.
Rental coverage is a major eligibility factor. Most lenders require the projected rental income to cover 125% to 145% of the mortgage payments, calculated using a stress-tested interest rate (often 5.5% to 7%). An accountant’s letter is used to verify the company’s income, especially when the business is newly incorporated or lacks full trading accounts.
Property type also matters. Lenders may restrict lending on non-standard construction, HMOs (houses in multiple occupation), or flats above commercial premises. Some may favour new builds, while others avoid them. Credit score expectations vary, but most lenders require a clean credit history, with no recent CCJs or defaults.
Age limits typically range from 21 to 85 at the end of the mortgage term. Employment status is less important if the rental income supports the loan, but self-employed applicants may need to provide additional documentation.
Portfolio landlords—those with four or more mortgaged buy-to-let properties—face additional scrutiny. Lenders assess the entire portfolio’s performance, including rental income, LTV ratios, and overall exposure. A business plan and cash flow forecast may be required.
Applications made through a limited company must use a special purpose vehicle (SPV) registered with Companies House under specific SIC codes related to property letting. Personal name applications are assessed differently and are subject to Section 24 tax restrictions, making limited company structures more appealing for higher-rate taxpayers.
Landlords must also comply with right-to-rent checks, property licensing (especially for HMOs), and local authority regulations. These compliance factors can affect mortgage approval.
Costs and Affordability
The total cost of a limited company buy to let mortgage accountant letter 2 year fixed includes several components. Arrangement fees range from £995 to 2% of the loan amount. Valuation fees vary based on property value, typically between £300 and £1,000. Legal fees are also payable, often higher for limited company applications due to more complex conveyancing. Broker fees may apply if using a mortgage adviser.
Interest rates for two-year fixed products currently range from 4.5% to 6.5%, depending on LTV, property type, and borrower profile. Fixed rates offer certainty, while variable rates may be lower initially but carry risk if base rates rise.
Affordability is assessed primarily on rental income. Lenders apply a stress-tested rate (e.g., 5.5% or higher) and require rental income to exceed mortgage payments by 125% to 145%. An accountant’s letter helps verify the company’s income and supports the affordability assessment.
Tax implications are significant. Section 24 restricts mortgage interest relief for personally held properties, but limited companies can still deduct mortgage interest as a business expense. This makes limited company structures more tax-efficient for higher-rate taxpayers. However, corporation tax and dividend tax must also be considered.
Landlords must also budget for insurance, including buildings and landlord insurance, both of which are typically required by lenders. Stress testing at higher rates ensures landlords can continue repayments if interest rates rise.
The Application Process
Applying for a limited company buy to let mortgage accountant letter 2 year fixed follows a structured process. First, research suitable lenders and products, ideally with the help of a specialist mortgage broker. Brokers have access to a wider range of lenders and can navigate complex criteria.
Next, gather documentation. This includes proof of identity, company registration documents, business bank statements, an accountant’s letter verifying income, projected rental income, and details of the property. If you’re a portfolio landlord, you’ll also need a full breakdown of your existing properties.
Once submitted, the lender will conduct a property valuation, either via desktop or physical inspection. A solicitor will handle legal checks, including verifying the company structure and property title. The underwriting process includes affordability checks, credit assessments, and due diligence on the company directors.
Applications typically take 4 to 8 weeks, depending on complexity. Working with a broker can help avoid delays and ensure all documentation meets lender requirements.
Common reasons for rejection include insufficient rental income, poor credit history, incorrect SIC codes on the company registration, or missing documentation. Ensuring your accountant’s letter is detailed and up-to-date is crucial for approval.
Benefits, Risks and Alternatives
The main benefit of a limited company buy to let mortgage accountant letter 2 year fixed is tax efficiency. Limited companies can deduct mortgage interest as a business expense, avoiding the Section 24 restriction that affects personal landlords. A fixed rate also offers short-term payment stability, helping investors plan cash flow.
However, there are risks. Void periods can impact rental income, and interest rate rises at the end of the fixed term may increase costs. Regulatory changes, such as licensing or EPC requirements, can also affect profitability.
Alternative finance options include bridging loans for short-term purchases, commercial mortgages for mixed-use properties, and development finance for refurbishment or new builds. These may suit investors with different strategies.
When the fixed period ends, landlords can choose to remortgage to a new lender or complete a product transfer with their current lender. Remortgaging may offer better rates but involves more paperwork. A product transfer is quicker but may be less competitive.
Frequently Asked Questions
What deposit do I need for a buy-to-let mortgage?
Most lenders require a minimum deposit of 25% for a buy-to-let mortgage. Some may accept 20% for low-risk applicants or properties, but limited company applications usually require at least 25% to 30% due to perceived risk. A higher deposit may unlock better interest rates and improve your chances of approval.
Can I get a limited company buy to let mortgage accountant letter 2 year fixed through a limited company?
Yes, this mortgage type is specifically designed for limited companies, typically SPVs set up solely for property letting. Lenders will require company registration details, SIC codes, and an accountant’s letter confirming the company’s income and financial position. Many landlords choose this route for tax efficiency and portfolio management.
What rental coverage do lenders require?
Lenders typically require rental income to cover 125% to 145% of the mortgage payments, calculated at a stress-tested interest rate. For example, if the stress rate is 5.5%, your monthly rent must be at least 125% of the interest-only payment at that rate. Some lenders offer lower stress tests for limited companies.
How does Section 24 tax affect buy-to-let mortgages?
Section 24 restricts the ability of individual landlords to deduct mortgage interest from rental income when calculating tax. This can lead to higher tax bills for higher-rate taxpayers. Limited companies are exempt from Section 24, allowing them to deduct mortgage interest as a business expense, which is why many landlords now use this structure.
Can I live in a property with a limited company buy to let mortgage accountant letter 2 year fixed