Limited company buy to let mortgage accountant letter no personal guarantee is a specialist type of landlord mortgage that allows property investors to secure finance through a limited company structure, without being personally liable for the loan. Instead of signing a personal guarantee, the lender may accept an accountant’s letter confirming the financial strength of the company. This is particularly attractive to portfolio landlords and investors looking to mitigate personal risk while benefiting from more favourable taxation rules associated with limited company ownership.
As of 2025, buy-to-let lending via limited companies continues to grow, driven by changes to mortgage interest relief and stricter affordability criteria for personal borrowers. Investment property finance through a limited company can offer greater flexibility, especially for higher-rate taxpayers. With lenders increasingly open to non-standard applications, securing a buy-to-let mortgage without a personal guarantee is now a realistic option for well-structured companies with solid rental income and professional support.
Quick Facts
– Interest rates: 5.25% to 6.75% depending on product type and lender
– Minimum deposit: 25% (some lenders may require 30% for specialist properties)
– Rental coverage: Typically 125% to 145% at a stress-tested rate of 5.5% to 8%
– Maximum loan-to-value (LTV): Up to 75%
– Arrangement fees: 1% to 2% of the loan amount or flat fees from £1,995
– Application timeline: 4 to 8 weeks from initial enquiry to completion
These mortgages are designed for landlords using a limited company to purchase or remortgage rental properties. They are assessed primarily on rental income and company viability, not personal income, and may require an accountant’s letter in lieu of a personal guarantee.
How This Mortgage Works
A limited company buy to let mortgage accountant letter no personal guarantee works by allowing the borrower to take out a mortgage through a special purpose vehicle (SPV) limited company. The company is the legal borrower, and the lender assesses the viability of the business rather than the individual directors. Instead of requiring a personal guarantee, which makes directors personally liable if the company defaults, some lenders will accept an accountant’s letter confirming the company’s financial health and ability to service the debt.
Mortgage products available include fixed-rate deals (typically 2- or 5-year terms), variable rates, and tracker mortgages. Fixed rates are popular for budgeting purposes, especially in a rising interest rate environment. This type of mortgage suits experienced landlords, portfolio investors, and those looking to scale their property business while keeping personal finances separate.
In 2025, lender appetite for limited company buy-to-let lending remains strong, particularly for well-capitalised companies with good rental yields. It differs from standard residential mortgages in that affordability is based on rental income, not personal salary, and the underwriting process is more business-focused.
Eligibility and Criteria
To qualify for a limited company buy to let mortgage accountant letter no personal guarantee, borrowers must meet specific eligibility criteria set by individual lenders. While requirements vary, the following are common across the market:
Income Requirements:
Most lenders do not require a minimum personal income if the mortgage is through a limited company. However, some may expect directors to earn at least £25,000 annually, especially if a personal guarantee is still being considered.
Rental Coverage and Stress Testing:
Lenders assess affordability using a rental coverage ratio, typically between 125% and 145% of the mortgage payment, stressed at an assumed interest rate of 5.5% to 8%. For example, if the monthly mortgage payment is £1,000, the rental income must be at least £1,250 to £1,450.
Property Type Restrictions:
Standard buy-to-let properties (houses and flats) are generally acceptable. However, some lenders restrict lending on HMOs (houses in multiple occupation), holiday lets, or properties above commercial premises unless the company has experience managing such assets.
Credit Score Expectations:
While the mortgage is in the company’s name, lenders still review the credit history of directors. A clean credit file is preferred, though minor issues may be accepted with specialist lenders.
Age and Employment:
Directors typically need to be aged 21 to 85 at the end of the mortgage term. Employment status is less critical, but lenders may want to see that directors have experience in property or business management.
Portfolio Landlord Criteria:
For those with four or more mortgaged buy-to-let properties, lenders apply additional scrutiny. This includes assessing the entire portfolio’s rental income, loan-to-value ratios, and overall gearing.
Limited Company vs Personal Name:
Mortgages through a limited company are assessed differently from personal buy-to-let mortgages. The company must be an SPV with a relevant SIC code (e.g., 68209 for property letting). Lenders may also require the company to have been incorporated for a minimum period, although new SPVs are often acceptable.
Regulatory Compliance:
Landlords must comply with right-to-rent checks, local licensing schemes, and EPC requirements. These regulatory obligations apply regardless of the mortgage structure.
Costs and Affordability
When applying for a limited company buy to let mortgage accountant letter no personal guarantee, landlords should budget for several costs:
– Arrangement fees: 1% to 2% of the loan or flat fees from £1,995
– Valuation fees: £300 to £1,000 depending on property value
– Legal fees: £1,000 to £2,500 for limited company conveyancing
– Broker fees: £500 to £2,000 depending on complexity
Interest rates vary by lender and product type. Fixed-rate products offer stability, while variable and tracker rates may be lower initially but carry more risk if rates rise. Rental income must cover the mortgage payments based on the lender’s stress test, not just actual interest.
Taxation is a key factor. Limited companies can offset mortgage interest as a business expense, avoiding the restrictions of Section 24 that affect personal landlords. However, corporation tax applies to profits, and extracting income via dividends may incur personal tax.
Insurance is mandatory, including buildings insurance and often landlord liability cover. Some lenders also require rent guarantee insurance.
The Application Process
Securing a limited company buy to let mortgage accountant letter no personal guarantee involves several key steps:
1. Research lenders that offer non-personal guarantee options and accept accountant letters.
2. Prepare your limited company documentation, including incorporation details and SIC code.
3. Obtain an accountant’s letter confirming the company’s financial position, rental income, and ability to service the loan.
4. Submit a mortgage application with supporting documents: company accounts, rental projections, ID for directors, and property details.
5. The lender will instruct a property valuation and may conduct a survey.
6. Legal work begins, including company checks and director verification.
7. Once approved, the mortgage offer is issued, and completion takes place.
Applications typically take 4 to 8 weeks. Working with a mortgage broker can streamline the process and improve your chances of approval, especially for complex cases. Direct applications may be slower and less flexible.
Common reasons for rejection include insufficient rental coverage, poor credit history of directors, or lack of experience managing rental properties. Ensuring your accountant’s letter is detailed and accurate can help avoid delays.
Benefits, Risks and Alternatives
The main benefit of a limited company buy to let mortgage accountant letter no personal guarantee is reduced personal risk. Investors are not personally liable for the mortgage debt, which protects personal assets. This structure also allows for more efficient taxation, especially for higher-rate taxpayers, and can facilitate portfolio growth.
Risks include potential void periods, rising interest rates, and changes in regulation. Lenders may charge higher rates or fees for non-personal guarantee products, and fewer lenders offer them compared to standard BTL mortgages.
Alternative finance options include bridging loans for short-term needs, commercial mortgages for mixed-use properties, or development finance for refurbishment projects. For existing borrowers, remortgaging or product transfers may offer better terms without switching lenders (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 limited company buy-to-let mortgages. However, for specialist properties such as HMOs or flats above shops, the deposit may increase to 30% or more. A larger deposit can also unlock better interest rates and improve affordability.
Can I get a limited company buy to let mortgage accountant letter no personal guarantee through a limited company?
Yes, some lenders allow limited company buy-to-let mortgages without a personal guarantee, provided an accountant’s letter is supplied. The letter must confirm the company’s financial strength and rental income. This option is typically available to well-established SPVs with solid rental yields and professional management.
What rental coverage do lenders require?
Lenders typically require rental income to cover 125% to 145% of the mortgage payment, based on a stress-tested interest rate of 5.5% to 8%. For example, if the monthly mortgage cost is £1,000, the rental income must be at least £1,250 to £1,450. Portfolio landlords may face stricter criteria.
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 does not apply to limited companies, which can treat mortgage interest as a business expense. As a result, many landlords have moved property ownership into a limited company structure.
Can I live in a property with a limited company buy to let mortgage accountant letter no personal guarantee?
No, buy-to-let mortgages are strictly for investment purposes. Living in the property would breach the mortgage terms and could result in repossession. If you intend to live in the property, you must apply for a residential mortgage instead.
What credit score do I need for a buy-to-let mortgage?
While there is no fixed score, most lenders expect directors to have a good credit history with no recent defaults or CCJs. Specialist lenders may accept minor issues, but this could result in higher