Limited company buy to let mortgage accountant letter SPV products are increasingly popular among UK landlords seeking tax-efficient ways to grow their property portfolios. These specialist buy-to-let lending solutions are designed for landlords purchasing or remortgaging investment properties through a limited company, often a Special Purpose Vehicle (SPV). Lenders typically require an accountant’s letter to confirm the company’s financial standing, especially when assessing affordability and rental income projections.
With changes to taxation (notably Section 24) and tightening regulations, many landlords are turning to limited company structures to mitigate tax liabilities and streamline portfolio management. In 2025, interest rates remain relatively high compared to pre-2022 levels, but lender competition in the limited company BTL space is growing. This mortgage route offers advantages such as full mortgage interest relief, flexible criteria for portfolio landlords, and access to bespoke investment property finance products. Understanding the nuances of this mortgage type is key to securing the right deal.
Quick Facts
– Interest rates: 5.2% to 6.8% (2025 average for limited company BTL)
– Minimum deposit: 25%, though some lenders may require 30%
– Rental coverage: 125% to 145% at 5.5% stress rate (or higher)
– Maximum loan-to-value (LTV): 75%
– Arrangement fees: Typically 1% to 2% of the loan amount
– Application timeline: 4 to 8 weeks from submission to completion
Limited company buy-to-let mortgages generally require higher rental stress testing than personal name applications. Lenders assess your SPV’s structure, rental income, and affordability using stricter criteria. An accountant’s letter is often mandatory to verify the financial viability of the company, especially if it’s newly formed or has limited trading history.
How This Mortgage Works
A limited company buy to let mortgage accountant letter SPV is a mortgage product designed specifically for landlords purchasing or refinancing rental properties through a limited company, usually structured as an SPV. An SPV is a company set up solely to hold and manage property investments, typically using SIC codes such as 68100 or 68209.
These mortgages operate similarly to standard buy-to-let mortgages but are underwritten in the name of the company rather than the individual. Lenders assess the company’s financials, the directors’ experience, and the projected rental income. An accountant’s letter is often required to confirm the company’s trading status, financial health, and tax position.
Product types include fixed-rate, variable, and tracker options. Fixed rates are popular in 2025 due to market volatility, offering landlords predictable monthly payments. Tracker mortgages may appeal to those expecting rate reductions in the medium term.
This mortgage type suits both first-time landlords establishing a property business and experienced portfolio landlords seeking tax efficiency. It differs from residential mortgages in that affordability is based on rental income rather than personal income, and lenders apply stricter stress testing. Limited company BTL lending is also exempt from some of the affordability rules that apply to regulated mortgages.
Eligibility and Criteria
To qualify for a limited company buy to let mortgage accountant letter SPV, applicants must meet both personal and company-level criteria. While affordability is primarily based on rental income, lenders also assess the directors’ creditworthiness and experience.
Income Requirements:
Most lenders do not require a minimum personal income for SPV applications, but some may request proof of income (e.g., £25,000+) to assess overall financial stability. An accountant’s letter can help verify income sources and company viability.
Rental Coverage and Stress Testing:
Lenders typically require rental income to cover 125% to 145% of the mortgage payments, stress-tested at 5.5% or higher. For limited companies, the stress rate may be lower due to the ability to offset mortgage interest against rental income for tax purposes.
Property Type Restrictions:
Standard buy-to-let properties (single lets, HMOs, flats) are generally acceptable. However, some lenders restrict lending on new builds, ex-local authority properties, or properties above commercial premises.
Credit Score Expectations:
A good credit history is essential. While lenders may be more flexible for SPVs, directors with adverse credit may face limited options or higher rates.
Age and Employment:
Most lenders set minimum age requirements (typically 21) and maximum age limits (usually 85 at end of term). Employment status is less critical for SPV applications, but self-employed directors may need additional documentation.
Portfolio Landlord Criteria:
Landlords with four or more mortgaged properties are classed as portfolio landlords. Lenders may require a full portfolio schedule, business plan, and evidence of rental income across the portfolio. An accountant’s letter is often used to confirm portfolio income and liabilities (Read our guide to portfolio landlord mortgages).
Limited Company vs Personal Name:
Limited company applications offer tax advantages but come with higher setup and legal costs. Personal name applications may have simpler processes but are subject to Section 24 mortgage interest relief restrictions.
Regulatory Compliance:
Landlords must comply with right-to-rent checks, local licensing schemes (e.g., HMO licences), and EPC requirements. Lenders may request evidence of compliance during the application.
Costs and Affordability
Limited company buy-to-let mortgages come with several costs that landlords must budget for:
– Arrangement fees: Typically 1% to 2% of the loan amount
– Valuation fees: £250 to £1,000 depending on property size and value
– Legal fees: £1,000 to £2,000 (more for limited company structures)
– Broker fees: £500 to £1,500 depending on complexity
Interest rates for SPV BTL mortgages in 2025 range from 5.2% to 6.8%, with fixed-rate products offering more stability. Variable and tracker products may offer lower initial rates but carry risk if interest rates rise.
Rental income must meet lender stress tests, usually based on 125%-145% of mortgage payments at a stressed rate. For SPVs, lenders may apply lower stress rates due to tax efficiency.
Tax Implications:
Unlike personal buy-to-let ownership, limited companies can deduct mortgage interest as a business expense. This avoids the Section 24 restrictions that limit tax relief on mortgage interest for individual landlords.
Insurance Requirements:
Lenders require buildings insurance and often recommend landlord insurance to cover loss of rent, liability, and legal expenses.
The Application Process
Applying for a limited company buy to let mortgage accountant letter SPV involves several steps:
1. Research lenders and products suitable for SPVs
2. Set up a limited company with appropriate SIC codes (e.g., 68100)
3. Consult an accountant for tax planning and to prepare the accountant’s letter
4. Obtain an Agreement in Principle (AIP)
5. Submit full application with supporting documents:
– Company incorporation documents
– Director ID and proof of address
– Business bank statements
– Accountant’s letter confirming financial status
– Property details and rental projections
6. Property valuation and survey arranged by the lender
7. Legal work (conveyancing) begins
8. Mortgage offer issued and completion arranged
Applications typically take 4 to 8 weeks. Working with a specialist mortgage broker can streamline the process, especially for portfolio landlords or complex company structures. Direct applications may be slower and risk rejection due to missing documentation or unsuitable lender selection.
Common pitfalls include inadequate rental income, incorrect SIC codes, or lack of an accountant’s letter. Ensuring all documentation is accurate and complete is key to avoiding delays.
Benefits, Risks and Alternatives
Benefits of a limited company buy to let mortgage accountant letter SPV include:
– Full mortgage interest relief for tax purposes
– Easier portfolio management and ownership transfer
– Potential for higher borrowing based on rental income
– Access to specialist lenders and products
However, risks include:
– Higher interest rates and fees compared to personal BTL
– Legal and accounting costs for company setup and maintenance
– Regulatory changes that may impact tax treatment or lending criteria
– Void periods or rent arrears affecting affordability
Alternatives include:
– Bridging loans for short-term finance
– Commercial mortgages for mixed-use or semi-commercial properties
– Development finance for refurbishment or conversions
Landlords should also consider remortgaging or product transfers with existing lenders to avoid exit fees or legal costs.
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. Some may ask for 30% depending on the property type or borrower profile. A higher deposit can help secure better interest rates and reduce monthly repayments.
Can I get a limited company buy to let mortgage accountant letter SPV through a limited company?
Yes, this mortgage type is specifically designed for landlords using a limited company, typically an SPV. The company must be registered with appropriate property-related SIC codes. Lenders will assess the company’s structure, directors, and rental income. An accountant’s letter is often required to confirm financial viability.
What rental coverage do lenders require?
Lenders usually require the projected rental income to cover 125% to 145% of the mortgage payments, stress-tested at 5.5% or higher. For limited company applications, some lenders may apply a lower stress rate due to the ability to offset mortgage interest against rental income.
How does Section 24 tax affect buy-to-let mortgages?
Section 24 restricts individual landlords from deducting mortgage interest from rental income when calculating tax. This can lead to higher tax bills. Limited companies are exempt from Section 24, allowing them to treat mortgage interest as a business expense, which is why many landlords now use SPVs.
Can I live in a property with a limited company buy to let mortgage accountant letter SPV?
No. Properties bought with a buy-to-let mortgage must be rented out and cannot be occupied by the borrower or their family. Living in the property would breach the mortgage terms and could lead to repossession. These mortgages are strictly for investment purposes.
What credit score do I need for a buy-to-let mortgage?
While