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Top 10 Lenders for £1 Million Buy-to-Let Business Finance in 2026
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Top 10 Lenders for £1 Million Buy-to-Let Business Finance
| Rank | Lender | Best for | Published loan range | Loan rate |
|---|---|---|---|---|
| 1 | One Stop Business Finance | Portfolio landlords needing flexible £1m-plus buy-to-let terms | £100,000 to £3,000,000 | interest 1.6% to 3% monthly |
| 2 | Inhale Capital | Investors requiring rapid bridging-to-let at £1 million scale | £0 to £2,000,000 | interest 1.05% to 1.3% monthly |
| 3 | Brightstar | Landlords comparing specialist rates for large buy-to-let loans | From £50,000 | interest 5% to 12% annually |
| 4 | NatWest Bank | Established landlords seeking high-street commercial mortgage rates | £500 to £10,000,000 | interest 4.5% to 10.5% annually |
| 5 | Virgin Money | Portfolio investors with 12-plus months trading history | £30,000 to £10,000,000 | interest 4.5% to 10.5% annually |
| 6 | Barclays | Large-scale landlords needing bank-backed buy-to-let security | £1,000 to £25,000,000 | interest 8.5% to 14.9% annually |
| 7 | Offa | Landlords exploring Sharia-compliant buy-to-let finance options | £80,000 to £2,500,000 | interest 5.9% to 7.5% annually |
| 8 | Together Money | Experienced investors needing flexible high-LTV buy-to-let lending | £50,000 to £25,000,000 | interest 0.55% to 1.5% monthly |
| 9 | OakNorth | Investors borrowing at the £1 million threshold and above | From £1,000,000 | interest 5.5% to 12.5% annually |
| 10 | MT Finance | Professional landlords seeking short-term buy-to-let bridging | £50,000 to £10,000,000 | interest 0.89% to 1.05% monthly |
A commercial mortgage is a loan secured against an investment property, used by landlords and property investors to purchase or refinance residential buy-to-let assets. It suits portfolio landlords because it allows borrowing against rental income potential rather than personal income alone. At the £1 million level, investors typically use these facilities to acquire multi-unit blocks or expand existing portfolios.
Comparison goes beyond headline rates. For a £1 million buy-to-let mortgage, investors should weigh loan-to-value ratios, interest coverage requirements, and whether the lender accepts portfolio landlords with multiple existing properties. Some lenders assess rental income at stressed rates, which affects maximum borrowing. Fixed versus variable rate structures also differ materially across lenders at this loan size.
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: Lends from £100,000 up to £3 million, making it a natural fit for landlords scaling a residential portfolio. Secured term loans and revolving facilities give buy-to-let investors room to fund purchases, refurbishments, or bridging gaps. The trade-off is that One Stop typically expects strong trading history and suitable security, so early-stage or asset-light applicants may not qualify.
Best next step: Check your eligibility with Funding Agent
More info
Company stats
Eligibility
Loan range
Rates and debtor rules
Benefits
- Loan range covers large portfolio needs
- Flexible secured and revolving credit options
- Funding typically within five working days
Need to know
- Strong trading history usually required
- Security and personal guarantee may apply
- Costs can rise with heavier usage
Expert take
A flexible secured lender built for established SMEs. For a landlord with a proven track record, the revolving structure works well for managing multiple property purchases or refinances. The underwriting rewards experienced investors who can demonstrate consistent rental income.
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: Funds in as little as 24 hours, which matters when a buy-to-let purchase is time-sensitive or a chain is at risk. Short-term property-backed lending up to £2 million covers auction purchases, light refurbishments, and bridge-to-let scenarios. Expect higher monthly fees and a clear exit strategy requirement — this is tactical capital, not long-term finance.
Best next step: Explore short-term BTL options
More info
Company stats
Eligibility
Loan range
Rates and debtor rules
Benefits
- Decisions and funding within 24 hours
- Covers auction and bridge-to-let deals
- Loans available up to £2 million
Need to know
- Short-term finance, not long-term BTL
- Clear exit strategy is essential
- Monthly interest costs are higher
Expert take
A speed-focused bridging lender for property investors. For landlords needing to move quickly on a below-market-value purchase or refinance before a deadline, Inhale's 24-hour turnaround is a genuine edge. Best used where the exit is already lined up.
Brightstar
Published loan rangeFrom £50,000
Rate typeinterest 5% to 12% annually
Overview: Annual rates from 5% make Brightstar one of the more cost-conscious choices for buy-to-let investors seeking short-term property finance. Loans start from £50,000 with no published upper limit, and funding can complete within 24 hours. The trade-off is that rate bands tighten with risk, and property-backed deals always carry valuation and legal costs.
Best next step: Compare short-term BTL rates here
More info
Company stats
Eligibility
Loan range
Rates and debtor rules
Benefits
- Competitive annual rates from 5%
- Fast 24-hour funding possible
- No fixed upper loan limit
Need to know
- Rates tighten with higher risk profiles
- Valuation and legal costs apply
- Primarily short-term property finance
Expert take
A cost-aware property finance specialist with bridging and short-term lending at its core. Brightstar's annual-rate model gives buy-to-let investors clearer cost visibility than monthly-rate alternatives. Suits landlords who prioritise headline rate over maximum leverage.
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NatWest Bank
Published loan range£500 to £10,000,000
Rate typeinterest 4.5% to 10.5% annually
Overview: NatWest's commercial mortgage desk handles facilities from £500 to £10 million, giving buy-to-let landlords access to mainstream bank pricing and long-term fixed-rate structures. Annual rates between 4.5% and 10.5% reflect the bank's tiered risk appetite. Expect full underwriting, detailed affordability assessment, and a slower timeline than alternative lenders.
Best next step: See NatWest BTL mortgage options
More info
Company stats
Eligibility
Loan range
Rates and debtor rules
Benefits
- Mainstream bank with long-term stability
- Commercial mortgages up to £10 million
- Fixed-rate structures available
Need to know
- Full underwriting takes longer
- Strong trading history expected
- Personal guarantee may be required
Expert take
A high-street bank with an established commercial mortgage division. For portfolio landlords with clean accounts and proven rental yields, NatWest's pricing is hard to beat. The process is thorough rather than fast, suiting planned purchases over deadline-driven deals.
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 structures commercial mortgages from £30,000 to £10 million, covering everything from single buy-to-let properties to larger portfolio refinances. Annual rates sit between 4.5% and 10.5%, with terms negotiated case by case. Expect bank-grade affordability checks and a process built for deliberate rather than urgent transactions.
Best next step: View Virgin Money BTL terms
More info
Company stats
Eligibility
Loan range
Rates and debtor rules
Benefits
- Wide loan range up to £10 million
- Long-term commercial mortgage terms
- Established high-street lender
Need to know
- Bank underwriting is thorough and slow
- Detailed affordability evidence needed
- Not suited to urgent completions
Expert take
A challenger-turned-mainstream bank with a broad commercial mortgage appetite. Virgin Money suits buy-to-let landlords who value banking relationship longevity and predictable repayment structures. Best for investors with time to work through a full application process.
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: For landlords operating through a limited company structure, Barclays' business mortgage range spans £1,000 to £25 million — one of the widest bands available. Annual rates from 8.5% to 14.9% reflect the risk-based pricing typical of a major bank's secured lending book. Expect rigorous affordability testing and a preference for established portfolio landlords.
Best next step: Check Barclays business mortgage rates
More info
Company stats
Loan range
Rates and debtor rules
Benefits
- Massive loan range up to £25 million
- Suitable for limited company landlords
- Major bank security and reputation
Need to know
- Rates start higher than some peers
- Lengthy underwriting process expected
- Strong portfolio track record needed
Expert take
A blue-chip bank with one of the UK's broadest secured lending books. Barclays fits limited company buy-to-let structures where the landlord already holds several properties. The higher headline rate reflects a commercial underwriting model that weighs portfolio performance heavily.
Offa
Published loan range£80,000 to £2,500,000
Rate typeinterest 5.9% to 7.5% annually
Overview: Offa's buy-to-let product carries annual rates from 5.9% to 7.5%, making it competitively priced for landlords seeking a dedicated BTL mortgage rather than a general commercial loan. The £80,000 to £2.5 million range covers single investments and small portfolios, with decisions reportedly available within an hour. Bear in mind that Offa is a specialist rather than a high-street name.
Best next step: Compare Offa BTL rates now
More info
Company stats
Eligibility
Loan range
Rates and debtor rules
Benefits
- Dedicated buy-to-let mortgage product
- Competitive rates from 5.9% annually
- Fast initial decisions within one hour
Need to know
- Specialist lender, not a high-street bank
- Loan cap at £2.5 million
- Full underwriting still required
Expert take
A specialist BTL mortgage provider with a focused product range. Offa's dedicated buy-to-let offering and swift initial decisions make it a practical choice for landlords who know exactly what they need. Suits straightforward single-property or small portfolio purchases.
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 — a range that accommodates everything from a first rental property to a large-scale portfolio acquisition. Monthly interest charges of 0.55% to 1.5% translate differently across loan sizes, so landlords should calculate the annual equivalent carefully. Together is a specialist lender, not a high-street bank.
Best next step: Explore Together Money BTL range
More info
Company stats
Loan range
Rates and debtor rules
Benefits
- Huge loan range up to £25 million
- Dedicated buy-to-let mortgage product
- Accepts smaller and larger portfolios
Need to know
- Monthly-rate structure needs careful comparison
- Specialist lender, not a mainstream bank
- Property valuation costs apply
Expert take
A long-established specialist lender with one of the broadest BTL mortgage ranges in the market. Together Money works well for landlords whose circumstances sit outside high-street criteria — unusual property types, complex income structures, or larger portfolio lending.
Source:https://togethermoney.com/
OakNorth
Published loan rangeFrom £1,000,000
Rate typeinterest 5.5% to 12.5% annually
Overview: OakNorth's buy-to-let finance starts at £1 million, positioning it firmly for experienced portfolio landlords rather than first-time investors. Annual rates from 5.5% to 12.5% reflect a bank model that underwrites each deal on its own cash-flow merits. Funding takes around two weeks — faster than most high-street banks but slower than bridging lenders.
Best next step: Check OakNorth BTL eligibility
More info
Company stats
Eligibility
Loan range
Rates and debtor rules
Benefits
- Built for portfolio landlords at £1m+
- Cash-flow-based underwriting approach
- Faster than traditional bank timelines
Need to know
- Minimum loan size is £1 million
- Not suitable for first-time landlords
- Two-week funding timeline typical
Expert take
A cash-flow-focused bank underwriting BTL on property performance rather than tick-box criteria. OakNorth's £1 million minimum aligns naturally with this loan size, and its model rewards landlords who can demonstrate strong rental coverage and a proven portfolio track record.
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 option for buy-to-let investors who need bridging capital at short notice. Loans from £50,000 to £10 million cover everything from single-property purchases to portfolio refinancing, with monthly rates between 0.89% and 1.05%. This is short-term money — landlords need a clear repayment or exit route.
Best next step: View MT Finance bridging terms
More info
Company stats
Loan range
Rates and debtor rules
Benefits
- Funding completed within 24 hours
- Loans available up to £10 million
- Competitive monthly bridging rates
Need to know
- Short-term bridging, not a BTL mortgage
- Clear exit strategy required
- Monthly rate costs add up quickly
Expert take
A well-regarded bridging lender with consistent pricing and fast execution. MT Finance suits landlords who need to bridge a purchase while arranging long-term finance or selling another property. The lower end of the rate band is competitive for quality security.
Source:https://www.mt-finance.com/
Commercial Mortgage Calculator
Loan-to-value ratios for £1 million buy-to-let mortgages
Loan-to-value (LTV) ratios are a central factor when raising £1 million buy-to-let business finance. LTV determines how much a lender will advance against the value of the investment property, and most specialist and bank lenders on this page cap LTV at 75%. One Stop Business Finance, Inhale Capital, Together Money, and OakNorth each offer up to 75% LTV. MT Finance caps at a slightly more conservative 70%. Offa extends to 80% for qualifying applications. Brightstar stands out with up to 100% LTV, though additional security or cross-collateralisation may be required at that level. Higher LTV means less equity you need to inject, but it also typically attracts a higher interest rate. At £1 million, even a 5% difference in LTV represents £50,000 of equity you either keep or commit. Property investors should factor in valuation fees and potential down-valuation when calculating their true borrowing capacity.
Interest rates on £1 million buy-to-let business finance
Rates on £1 million buy-to-let business finance fall into two clear structures: monthly interest from shorter-term and bridging-style lenders, and annual interest from banks and term mortgage providers. Among monthly-rate lenders, Together Money publishes rates from 0.55% to 1.5% per month. MT Finance sits at 0.89% to 1.05% per month, while Inhale Capital quotes 1.05% to 1.3% per month. One Stop Business Finance ranges from 1.6% to 3% per month. On the annual side, NatWest and Virgin Money both sit in the 4.5% to 10.5% per year band. Brightstar spans 5% to 12% per year and OakNorth 5.5% to 12.5% per year. Offa publishes a tighter 5.9% to 7.5% annual range. Barclays starts higher at 8.5% to 14.9% per year. Monthly rates suit shorter-term or refurbishment-led buy-to-let strategies, while annual rates are more common for long-term portfolio holdings.
Eligibility requirements for £1 million buy-to-let landlord finance
Eligibility for £1 million buy-to-let business finance varies considerably between high-street banks and specialist lenders. NatWest requires a minimum turnover of £300,000, which can be a barrier for smaller portfolio landlords. Virgin Money asks for at least one year of trading history. By contrast, One Stop Business Finance sets no minimum turnover and accepts businesses from 0 months, making it accessible to new special purpose vehicle (SPV) structures often used in buy-to-let investing. Personal guarantees are required by most lenders on this list, including One Stop Business Finance, Inhale Capital, Brightstar, NatWest, Virgin Money, and OakNorth. This means your personal assets back the loan if the business cannot repay. OakNorth explicitly confirms no homeowner requirement, and One Stop Business Finance and Inhale Capital also do not require homeownership. Card payment history is not needed for any of these property-focused facilities.
How to strengthen a £1 million buy-to-let finance application
Securing £1 million buy-to-let business finance at competitive terms requires preparation. Lenders will scrutinise the property's rental yield, your track record as a landlord, and the strength of the underlying asset. Start by ensuring the investment property can demonstrate a healthy rental cover ratio — most lenders want rent to exceed mortgage payments by 125% to 145%. A clean credit history and documented experience managing similar properties will strengthen your application. If your business does not meet the turnover or trading history requirements of high-street banks like NatWest or Virgin Money, specialist lenders such as One Stop Business Finance offer more flexible entry points with no minimum trading history. Consider structuring the borrowing through an SPV, which is common at the £1 million level and may improve tax efficiency. Finally, have your property valuation, tenancy agreements, and asset schedules ready before approaching a broker or lender. Preparation reduces delays and improves the offers you receive.
