Limited company buy to let mortgage basic rate taxpayer new company is an increasingly popular strategy for UK landlords looking to grow their property portfolios in a tax-efficient way. In 2025, more investors are forming new limited companies to purchase rental properties, especially those who are basic rate taxpayers aiming to mitigate the impact of Section 24 mortgage interest relief restrictions. This type of buy-to-let lending allows landlords to ringfence their property investments from personal finances while potentially benefiting from more favourable taxation. With rising interest rates and tighter affordability checks, using a limited company structure can offer greater flexibility and long-term planning advantages. Whether you’re a first-time landlord or a seasoned investor, understanding how landlord mortgages through a new company work is essential for successful investment property finance.
Quick Facts
– Interest rates: 5.0% to 6.5% (2025 average for limited company BTL)
– Minimum deposit: 25% (some lenders may require more)
– Rental coverage: 125% to 145% at 5.5% – 8.5% stress rate
– Maximum loan-to-value (LTV): 75%
– Arrangement fees: 1% to 2% of the loan amount
– Application timeline: 4 to 8 weeks
Limited company buy-to-let mortgages typically come with slightly higher interest rates than personal name BTLs but offer tax advantages for many investors. Lenders assess affordability using rental income rather than personal salary, and stress tests are applied to ensure the loan is sustainable. Most lenders require a minimum 25% deposit and a strong rental yield to meet affordability criteria.
How This Mortgage Works
A limited company buy to let mortgage for a basic rate taxpayer with a new company allows you to purchase or remortgage rental property through a Special Purpose Vehicle (SPV) limited company. Rather than borrowing in your personal name, the mortgage is held by the company, which becomes the legal owner of the property. This structure is especially attractive to basic rate taxpayers looking to avoid the full impact of Section 24, which restricts mortgage interest tax relief on personally held properties.
Mortgage products for limited companies include fixed-rate deals (typically 2 to 5 years), variable rates, and tracker mortgages. Fixed rates offer stability, while trackers may benefit from rate reductions if the Bank of England base rate falls.
This type of mortgage suits new landlords setting up their first SPV, experienced portfolio landlords seeking tax efficiency, and investors planning long-term property strategies. Lender appetite for limited company BTL remains strong in 2025, with many specialist lenders offering competitive BTL mortgage rates for SPVs.
Unlike residential mortgages, affordability is based on projected rental income rather than personal income. Also, underwriting focuses on the company structure, director experience, and property viability.
Eligibility and Criteria
To qualify for a limited company buy to let mortgage as a basic rate taxpayer with a new company, you’ll need to meet specific lender criteria. While personal income is less critical than for residential mortgages, some lenders still require a minimum income threshold – typically £25,000 to £30,000 – to ensure financial stability.
Rental income is key. Lenders use a rental coverage ratio (ICR) of 125% to 145% at a stress-tested interest rate, often between 5.5% and 8.5%. This means the projected rent must significantly exceed the mortgage payment to ensure affordability.
Property type matters. Most lenders prefer standard buy-to-let properties in good condition. Flats above commercial premises, HMOs, and holiday lets may be accepted by specialist lenders but come with stricter criteria.
Credit history plays a significant role. While some adverse credit may be accepted, a good credit score improves your chances of approval and access to better rates. Most lenders require directors to be over 21, with an upper age limit of around 85 at the end of the mortgage term.
If you’re a portfolio landlord (owning four or more mortgaged BTL properties), lenders may ask for a full portfolio breakdown, business plan, and evidence of rental income across all properties. This helps assess overall exposure and risk.
Lenders typically require the limited company to be an SPV registered with Companies House under SIC codes such as 68209 (Other letting and operating of own or leased real estate). Trading companies with other activities may be excluded or face additional scrutiny.
Right-to-rent compliance, landlord licensing (especially in selective licensing areas), and adherence to local authority rules are essential. Lenders may request proof of compliance before issuing a mortgage offer.
Costs and Affordability
Costs associated with a limited company buy to let mortgage include arrangement fees (usually 1% to 2% of the loan), valuation fees (£300 to £1,000+ depending on property value), legal fees (£1,000 to £2,000 for limited company conveyancing), and broker fees if using a mortgage adviser.
Interest rates for limited company BTLs in 2025 typically range from 5.0% to 6.5%, slightly higher than personal BTL rates due to perceived risk and complexity. Fixed rates offer repayment certainty, while variable rates may be more flexible but riskier if base rates rise.
Rental income is the primary affordability metric. Lenders assess whether the rent covers 125% to 145% of the mortgage payment, using a stress-tested rate. For example, a £1,000 monthly rent may only support a loan of £150,000 depending on the stress rate used.
Taxation is a major consideration. Limited companies can deduct mortgage interest as a business expense, unlike personal landlords affected by Section 24. However, corporation tax (currently 25% for most companies) applies to profits, and extracting income via dividends may incur personal tax.
Insurance is mandatory. You’ll need buildings insurance and often landlord insurance, covering loss of rent, liability, and property damage. Some lenders require proof of cover before completion.
The Application Process
Applying for a limited company buy to let mortgage involves several key steps:
1. Research lenders or work with a specialist mortgage broker.
2. Set up a new SPV limited company with the correct SIC code.
3. Prepare documentation: proof of ID, company registration, business bank account, rental income projections, and director income (if required).
4. Submit a Decision in Principle (DIP) to check eligibility.
5. Complete a full mortgage application and pay valuation fees.
6. Undergo property valuation and lender underwriting.
7. Legal conveyancing is carried out by solicitors experienced in limited company BTL.
8. Mortgage offer issued, contracts exchanged, and completion takes place.
Applications typically take 4 to 8 weeks from DIP to completion. Delays can occur due to valuation issues, incomplete documentation, or legal complexities.
Working with a mortgage broker can streamline the process, especially for new companies or complex portfolios. Brokers can access specialist lenders not available directly and help avoid common pitfalls.
Rejections often occur due to insufficient rental income, incorrect company structure, or poor credit. Ensuring your company is correctly set up and the property meets lender criteria is essential.
Benefits, Risks and Alternatives
The main benefits of a limited company buy to let mortgage for basic rate taxpayers include full mortgage interest tax relief, separation of personal and business finances, and potential for long-term tax efficiency as your portfolio grows. It also facilitates easier transfer of ownership and inheritance planning.
However, there are risks. Interest rates are higher for limited companies, and void periods can impact cash flow. Regulatory changes, such as licensing rules or EPC requirements, may affect profitability. Extracting profits from the company can also trigger dividend tax liabilities.
Alternatives include personal name BTL mortgages (better for small-scale landlords), bridging loans for short-term finance, commercial mortgages for mixed-use properties, or development finance for renovation projects.
Remortgaging from a personal name to a limited company involves a sale to the company, incurring stamp duty and legal costs. In some cases, a product transfer with your current lender may be more cost-effective (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 a limited company buy-to-let mortgage. However, some specialist lenders may ask for 30% or more, especially for non-standard properties or first-time landlords. The higher your deposit, the better your chances of securing competitive interest rates and passing affordability stress tests.
Can I get a limited company buy to let mortgage basic rate taxpayer new company through a limited company?
Yes, many lenders offer buy-to-let mortgages to SPV limited companies, even if the company is newly formed. As a basic rate taxpayer, using a limited company can provide tax benefits, particularly full mortgage interest relief. Lenders will assess the company structure, director experience, and rental income projections.
What rental coverage do lenders require?
Lenders typically require rental income to cover 125% to 145% of the mortgage payment, stress-tested at an interest rate between 5.5% and 8.5%. For example, if your mortgage payment is £1,000 per month, your rent must be at least £1,250 to £1,450 depending on the lender’s criteria. This ensures the loan remains affordable even if interest rates rise.
How does Section 24 tax affect buy-to-let mortgages?
Section 24 restricts the amount of mortgage interest landlords can deduct from rental income when calculating tax. This affects personal landlords but not limited companies. As a result, many investors use limited company structures to retain full interest relief and reduce their tax liability. However, corporation tax and dividend tax must be considered.
Can I live in a property with a limited company buy to let mortgage basic rate taxpayer new company?
No, you cannot live in a property purchased with a limited company buy-to-let mortgage. These mortgages are strictly for investment purposes, and lenders prohibit owner-occupancy. Living in the property would breach mortgage terms and could lead to repossession. If you plan to live in the property, you