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Top 10 Lenders for £900,000 Buy-to-Let Business Finance in 2026
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Top 10 Lenders for £900,000 Buy-to-Let Business Finance
| Rank | Lender | Best for | Published loan range | Loan rate |
|---|---|---|---|---|
| 1 | One Stop Business Finance | Property investors seeking flexible terms on large BTL portfolios | £100,000 to £3,000,000 | interest 1.6% to 3% monthly |
| 2 | Inhale Capital | Landlords needing fast bridging-to-let at competitive monthly rates | £0 to £2,000,000 | interest 1.05% to 1.3% monthly |
| 3 | Brightstar | Portfolio landlords comparing specialist BTL mortgage options | From £50,000 | interest 5% to 12% annually |
| 4 | NatWest Bank | Established investors wanting high-street BTL mortgage security | £500 to £10,000,000 | interest 4.5% to 10.5% annually |
| 5 | Virgin Money | Experienced landlords seeking bank-backed BTL rates at scale | £30,000 to £10,000,000 | interest 4.5% to 10.5% annually |
| 6 | Barclays | Larger portfolio investors needing high-value BTL facilities | £1,000 to £25,000,000 | interest 8.5% to 14.9% annually |
| 7 | Offa | Investors comparing Sharia-compliant BTL purchase finance | £80,000 to £2,500,000 | interest 5.9% to 7.5% annually |
| 8 | Together Money | Landlords needing flexible BTL terms on complex properties | £50,000 to £25,000,000 | interest 0.55% to 1.5% monthly |
| 9 | Admiral leasing | Included for comparison across commercial mortgage options | From £1,000 | interest 5.5% to 13.5% annually |
| 10 | MT Finance | Investors comparing short-term BTL bridging rates for portfolios | £50,000 to £10,000,000 | interest 0.89% to 1.05% monthly |
A commercial mortgage is a secured loan used to purchase or refinance investment property, with the property itself acting as collateral. For buy-to-let investors, it provides long-term funding to acquire residential properties that generate rental income, making it one of the best routes for building a property portfolio. At £900,000, this level of finance typically supports purchasing a high-value rental property or refinancing an existing portfolio to release equity for further investment.
Comparing the top buy-to-let lenders goes beyond headline rates. Investors should weigh rental cover requirements, loan-to-value limits, and whether the lender accepts portfolio landlords with multiple properties. Interest rate type matters. Fixed rates offer certainty while variable rates provide flexibility. Fees, including arrangement and valuation costs, can vary significantly. Your choice of rate structure will directly affect monthly cashflow on a £900,000 facility.
Important note:
Funding Agent
Published loan rangeFrom £10,000 to up to £1,000,000
Rate typeInterest from 6.8% annually
Why it is included:It is included because many business owners need to compare several finance routes before choosing where to apply.
Funding Agent can help businesses compare suitable options across a lender panel, especially when eligibility depends on turnover, sector, trading history, credit strength and available documents.
Best use case: When the borrower wants to avoid applying to one lender at a time.
More info
Company stats
Eligibility
Loan range
Rates and debtor rules
Why it stands out
- Useful when a business wants to compare lender fit rather than guess which lender to apply to first.
- Can help position the application around the funding purpose, trading profile and available documents.
- Works well as a conversion route for readers who are unsure whether a direct lender will approve a larger unsecured facility.
Need to know
- Funding Agent is a broker, not a lender.
- The lender, not Funding Agent, sets the final rate, term, fees and approval decision.
- The best match may be unsecured, secured, revolving credit, invoice finance or another product depending on the case.
Expert take
Funding Agent is a useful honourable mention for business owners who want to compare lender options before submitting a full application. A larger unsecured loan is not always approved by the first lender a business finds, so understanding lender fit early can reduce wasted time and avoid unnecessary declines.
One Stop Business Finance
Published loan range£100,000 to £3,000,000
Rate typeinterest 1.6% to 3% monthly
Overview: Monthly interest from around 1.6% keeps servicing costs manageable on a £900,000 buy-to-let facility. One Stop Business Finance secures lending against residential investment property, with affordability checks and personal guarantees often forming part of the package. The lender can accommodate larger secured facilities where the numbers stack up. Valuation and legal costs add to the total outlay.
Best next step: Explore secured BTL rates from 1.6% monthly.
More info
Company stats
Eligibility
Loan range
Rates and debtor rules
Benefits
- Monthly rates from around 1.6%
- Lends up to £3 million
- Secured against investment property
Need to know
- Personal guarantee may be required
- Valuation and legal costs apply
- Affordability checks are thorough
Expert take
A secured lender with a property and bridging specialism, suited to landlords needing larger facilities against residential investments. For a £900,000 buy-to-let, the monthly rate structure works well when rental income comfortably covers interest.
Source:https://www.osbf.co.uk/
Inhale Capital
Published loan range£0 to £2,000,000
Rate typeinterest 1.05% to 1.3% monthly
Overview: Funding can land within 24 hours, making Inhale Capital a strong fit for investors racing to complete on a £900,000 buy-to-let purchase before a deadline. The lender works with property-backed deals and takes a short-term secured approach. Rates sit between 1.05% and 1.3% monthly. Borrowers should be ready for the exit planning and valuation checks that come with fast bridging-style finance.
Best next step: Get fast BTL bridging from 1.05% monthly.
More info
Company stats
Eligibility
Loan range
Rates and debtor rules
Benefits
- Funding within 24 hours
- Monthly rates from 1.05%
- Loans up to £2 million
Need to know
- Short-term exit plan needed
- Valuation checks are required
- Higher fees may apply
Expert take
A speed-focused property lender that suits time-sensitive buy-to-let purchases and bridging scenarios. On a £900,000 deal, the 24-hour turnaround helps investors move quickly, provided the exit route and security position are clear.
Brightstar
Published loan rangeFrom £50,000
Rate typeinterest 5% to 12% annually
Overview: Brightstar structures property-backed facilities from £50,000 upward with annual interest rates between 5% and 12%, giving buy-to-let investors a longer-term alternative to monthly bridging products. The lender funds within 24 hours where the security and paperwork align. For a £900,000 residential investment purchase, the annual rate model simplifies cashflow forecasting compared to rolling monthly interest.
Best next step: Compare annual-rate BTL options from 5%.
More info
Company stats
Eligibility
Loan range
Rates and debtor rules
Benefits
- Annual rates from 5%
- Funds within 24 hours
- Loans from £50,000 upward
Need to know
- Security valuation is mandatory
- Exit and repayment plan needed
- Property-backed only
Expert take
A property-secured lender offering annual-rate structures that suit buy-to-let investors wanting predictable repayment costs. For a £900,000 purchase, the annual interest model and quick turnaround make this a practical bridging-to-term candidate.
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NatWest Bank
Published loan range£500 to £10,000,000
Rate typeinterest 4.5% to 10.5% annually
Overview: A commercial mortgage from NatWest can stretch well beyond £900,000, with published lending from £500 to £10 million. Buy-to-let investors benefit from a high-street lender's rate structure, with annual interest typically between 4.5% and 10.5%. Bank underwriting takes longer than alternative finance and demands strong affordability evidence, trading history, and often a personal guarantee.
Best next step: Check NatWest commercial mortgage rates.
More info
Company stats
Eligibility
Loan range
Rates and debtor rules
Benefits
- Annual rates from 4.5%
- Lends up to £10 million
- Established high-street lender
Need to know
- Slower bank underwriting process
- Strong trading history needed
- Personal guarantee often required
Expert take
A mainstream bank whose commercial mortgage suits established landlords with clean accounts and proven rental income. For £900,000 buy-to-let, the lower annual rates appeal, but underwriting demands and timelines are heavier than specialist alternatives.
Source:https://www.natwest.com/business/loans-and-finance.html
Virgin Money
Published loan range£30,000 to £10,000,000
Rate typeinterest 4.5% to 10.5% annually
Overview: Virgin Money opens its commercial mortgage book to buy-to-let investors from £30,000, making its lending threshold accessible well below the £900,000 mark. Annual rates run roughly 4.5% to 10.5%, and the bank can fund up to £10 million for larger portfolios. Expect the standard bank underwriting rhythm: detailed affordability checks, trading history review, and likely a personal guarantee requirement.
Best next step: View Virgin Money BTL mortgage criteria.
More info
Company stats
Eligibility
Loan range
Rates and debtor rules
Benefits
- Low £30,000 starting threshold
- Annual rates from 4.5%
- Loans available to £10 million
Need to know
- Bank underwriting takes longer
- Trading history is scrutinised
- Personal guarantee often needed
Expert take
A high-street lender with broad commercial mortgage appetite, from small BTLs to multimillion-pound portfolios. For £900,000, Virgin Money offers mainstream credibility and competitive annual rates, though approvals reward patient, well-documented applications.
Source:https://uk.virginmoney.com/business/business-borrowing/
Barclays
Published loan range£1,000 to £25,000,000
Rate typeinterest 8.5% to 14.9% annually
Overview: Barclays offers business mortgages with published annual rates from 8.5%, which sit higher than some high-street peers but still provide a familiar banking route to £900,000 buy-to-let finance. The bank lends from £1,000 to £25 million, so portfolio expansion is well within scope. Underwriting leans on affordability evidence, security valuation, and trading track record. Be prepared for a lengthier approval timeline.
Best next step: Explore Barclays business mortgage options.
More info
Company stats
Loan range
Rates and debtor rules
Benefits
- Lends up to £25 million
- Widely recognised lender
- Covers buy-to-let purchases
Need to know
- Rates start from 8.5% annually
- Lengthy bank approval process
- Security and affordability checked
Expert take
A major clearing bank whose business mortgage product can accommodate buy-to-let lending at scale. For a £900,000 investment, the higher starting rate may be offset by long-term relationship benefits, but the underwriting journey demands patience and strong financials.
Offa
Published loan range£80,000 to £2,500,000
Rate typeinterest 5.9% to 7.5% annually
Overview: Offa is a buy-to-let specialist, structuring residential investment mortgages from £80,000 to £2.5 million with annual rates between 5.9% and 7.5%. A £900,000 purchase lands comfortably in its lending sweet spot. The product is purpose-built for landlords rather than general commercial borrowers. Funding decisions can arrive within an hour where documentation is ready, giving investors a faster alternative to traditional bank processing.
Best next step: Check Offa buy-to-let rates and terms.
More info
Company stats
Eligibility
Loan range
Rates and debtor rules
Benefits
- Purpose-built BTL product
- Annual rates from 5.9%
- Decisions within one hour
Need to know
- Maximum loan £2.5 million
- Security valuation required
- BTL-specific criteria apply
Expert take
A buy-to-let focused lender whose product design reflects landlord needs rather than general commercial lending. For a £900,000 residential investment, the specialist underwriting and quick initial decisions make Offa a strong contender for investors wanting swift clarity.
Source:https://offa.co.uk/
Together Money
Published loan range£50,000 to £25,000,000
Rate typeinterest 0.55% to 1.5% monthly
Overview: Together Money writes buy-to-let mortgages from £50,000 to £25 million, giving a £900,000 deal ample headroom within its lending appetite. Monthly interest runs 0.55% to 1.5%, which can translate to competitive servicing costs for landlords with strong rental coverage. The lender takes a property-backed, secured approach typical of specialist BTL providers. Underwriting weighs the asset value and income stream carefully.
Best next step: Review Together Money BTL mortgage rates.
More info
Company stats
Loan range
Rates and debtor rules
Benefits
- Lends up to £25 million
- Monthly rates from 0.55%
- Specialist BTL mortgage lender
Need to know
- Valuation and legal costs apply
- Income and asset assessment
- Longer-term exit needed
Expert take
A specialist buy-to-let mortgage lender with deep lending capacity, making larger portfolio deals routine rather than exceptional. For a £900,000 investment, the low monthly rate floor and extensive BTL experience make this a credible option for landlords scaling up.
Source:https://togethermoney.com/
Admiral leasing
Published loan rangeFrom £1,000
Rate typeinterest 5.5% to 13.5% annually
Overview: Admiral leasing offers commercial mortgages from £1,000 upward, making its entry point among the lowest on this list. Annual rates range from 5.5% to 13.5%, reflecting the breadth of risk the lender considers. For a £900,000 buy-to-let purchase, it provides a secured, property-backed route with term loan and asset finance capability alongside its mortgage offering. Strong trading history and affordability evidence are likely prerequisites.
Best next step: Compare Admiral commercial mortgage rates.
More info
Company stats
Loan range
Rates and debtor rules
Benefits
- Low £1,000 entry threshold
- Annual rates from 5.5%
- Secured property lending
Need to know
- Trading history scrutinised
- Personal guarantee possible
- Valuation and legal costs
Expert take
A lender blending commercial mortgage, asset finance, and term loan capability under one roof. For a £900,000 buy-to-let, Admiral leasing offers flexibility but will test affordability and trading record thoroughly, suiting established investors with demonstrable income.
MT Finance
Published loan range£50,000 to £10,000,000
Rate typeinterest 0.89% to 1.05% monthly
Overview: MT Finance funds property-backed deals within 24 hours, making it a practical choice for buy-to-let investors needing to bridge a £900,000 purchase quickly. Monthly rates from 0.89% to 1.05% keep short-term holding costs predictable. The lender operates across the £50,000 to £10 million range, so larger deals are routine. Expect a secured structure with valuation requirements and exit planning central to the approval.
Best next step: Get rapid BTL bridging from MT Finance.
More info
Company stats
Loan range
Rates and debtor rules
Benefits
- Funding within 24 hours
- Monthly rates from 0.89%
- Loans from £50k to £10m
Need to know
- Exit strategy is essential
- Valuation check required
- Short-term product structure
Expert take
A fast-moving property lender built for bridging scenarios where speed trumps everything else. For a £900,000 buy-to-let, MT Finance suits investors who have a clear refinance or sale exit and need the capital deployed without delay.
Source:https://www.mt-finance.com/
Commercial Mortgage Calculator
How rental yield affects £900,000 buy-to-let lending decisions
At £900,000, lenders scrutinise rental income carefully. Most apply an interest coverage ratio (ICR) of 125% to 145%, meaning monthly rent must exceed the mortgage interest by 25% to 45%. On a £900,000 loan at 5% per year, monthly interest sits around £3,750. At 125% ICR, you would need £4,688 in monthly rent. At 145%, that rises to £5,438.
Lenders also stress-test at higher notional rates, often 6.5% to 8% per year, to ensure you can manage if rates rise. Properties in stronger rental markets such as London, Manchester, and Birmingham typically meet these thresholds more easily. Before approaching a lender, calculate your projected yield and check ICR expectations for your property type. Some lenders assess on an interest-only basis, which can improve affordability for buy-to-let borrowers at this loan size.
Comparing interest rates and LTV on £900,000 buy-to-let mortgages
Rates vary significantly across lenders in the £900,000 buy-to-let space. Some quote monthly interest, others use annual rates. Together Money publishes rates from 0.55% to 1.5% per month, while Inhale Capital sits between 1.05% and 1.3% per month. One Stop Business Finance ranges from 1.6% to 3% per month. On the annual side, Offa offers 5.9% to 7.5% per year, and Brightstar spans 5% to 12% per year.
| Lender | Rate Range | Max LTV |
|---|---|---|
| Together Money | 0.55% to 1.5% per month | 75% |
| Inhale Capital | 1.05% to 1.3% per month | 75% |
| One Stop Business Finance | 1.6% to 3% per month | 75% |
| Offa | 5.9% to 7.5% per year | 80% |
Most lenders cap LTV at 75%, though Offa extends to 80% and Brightstar can reach 100% in certain cases. At £900,000, even small differences in rate or LTV have a meaningful impact on your monthly commitment and deposit requirement.
Portfolio landlord considerations for £900,000 property investment finance
If you already own four or more buy-to-let properties, lenders classify you as a portfolio landlord. This triggers additional underwriting. Lenders typically review aggregate portfolio performance, not just the new property, and may request a full schedule of existing assets, loan-to-value across the portfolio, and global rental income.
Some lenders also assess whether you hold properties in a limited company or SPV, which is common at the £900,000 level for tax efficiency. Personal guarantees are standard across most lenders on this list. Brightstar, One Stop Business Finance, and Inhale Capital all require them. Portfolio exposure limits can also apply: a lender may cap total borrowing across all properties, so check whether a new £900,000 facility sits within their aggregate ceiling. Working with a broker who understands portfolio underwriting helps avoid applications that stall at the final stage.
How to maximise borrowing against residential buy-to-let property at £900,000
To strengthen your application for £900,000 buy-to-let finance, focus on the property's income potential. Lenders value strong rental demand, so a property in a high-yield postcode with proven tenant appetite carries more weight than one in a softer market.
LTV is the main lever. Most lenders stop at 75%, but Offa goes to 80% and Brightstar can reach 100% with additional security. If you have equity in another property, cross-collateralisation can bridge the deposit gap. Interest-only terms also improve borrowing capacity by lowering the monthly payment used in ICR calculations.
Present a clear rental appraisal from a qualified agent and, if possible, evidence of strong portfolio performance. Lenders such as NatWest and Virgin Money offer terms up to 25 years, which can spread repayments and keep monthly costs manageable on a £900,000 facility.
