Interbay Commercial Mortgages Review (2026) | Business Expert
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Interbay Commercial Mortgages Review (2026): Rates, Criteria and Verdict

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Interbay Commercial Mortgages at a Glance

Interbay is a specialist commercial mortgage lender operating under the OSB Group umbrella — the same parent that owns Kent Reliance, Precise Mortgages, and Charter Savings Bank. It lends exclusively through intermediaries and focuses on the cases that high-street banks routinely decline: SPV borrowers, mixed-use and semi-commercial properties, HMOs, multi-unit freehold blocks, and applicants with an adverse credit history.

If you have been turned down by a mainstream lender, Interbay is one of a small group of specialist challengers worth approaching through a commercial mortgage broker. Rates start from 5.49% for semi-commercial products and from 5.68% on owner-occupied commercial deals at 45% LTV, so you will pay more than you would at a high-street bank — but the trade-off is access to manual underwriting, flexible criteria, and structures that most mainstream lenders will not consider.

Our Verdict

Interbay is a credible, well-capitalised specialist lender for complex commercial and semi-commercial mortgage requirements. Its parent OSB Group reported an 11% increase in originations to £1.2 billion in Q1 2026, a sign of genuine market momentum. Rates are higher than high-street alternatives and the broker-only model adds a layer of cost and process, but for borrowers who need flexibility — whether that is SPV ownership, adverse credit acceptance, or a non-standard property type — Interbay sits comfortably in the shortlist of serious specialist options alongside Shawbrook and Paragon.

The key limitation is straightforward: if you have clean credit, a standard property, and can qualify with a mainstream lender, the rate savings available elsewhere (from 4.45% at HSBC or Barclays) will typically outweigh Interbay’s structural advantages. But for everyone else, Interbay deserves a genuine look.

Best For

  • SPVs, LLPs, trusts, and pension schemes (including SIPPs) seeking commercial finance
  • Investors buying mixed-use, semi-commercial, or multi-unit freehold block properties
  • Borrowers with historic adverse credit who have maintained a clean mortgage record for 24 months
  • HMO and complex BTL investors needing a lender comfortable with non-standard asset types
  • Transactions requiring manual, case-specific underwriting rather than automated scoring

Not Ideal For

  • Borrowers who can qualify with a mainstream bank and want the lowest available rates
  • Anyone looking to apply directly without a broker — Interbay does not accept direct applications
  • Loans below £125,000, which fall outside Interbay’s minimum threshold
  • Buyers seeking FCA-regulated mortgage advice on a commercial product — these loans sit outside regulated scope

Key Facts

  • Minimum loan: £125,000
  • Maximum per property: up to £5 million
  • Maximum portfolio exposure: £15 million per customer
  • Maximum LTV: 75%
  • Rates from: 5.49% (semi-commercial); 5.68% (commercial owner-occupied at 45% LTV)
  • Application route: Broker only — no direct applications
  • Parent group: OSB Group (OneSavings Bank PLC)
  • Regulated: Commercial products are unregulated under FSMA 2000

What Are Interbay Commercial Mortgages?

Interbay is the commercial and specialist lending arm of OSB Group, one of the UK’s larger challenger banking groups by mortgage origination volume. Within OSB Group’s portfolio, Interbay handles commercial mortgages, semi-commercial mortgages, buy-to-let (BTL) lending, HMO finance, and unregulated bridging loans. It is not a generalist lender; its entire proposition is built around complexity and non-standard cases that fall outside mainstream credit appetite.

How Interbay Commercial Mortgages Work

Interbay provides first-charge lending against commercial and semi-commercial property in England, Wales, and Scotland. Commercial mortgages cover owner-occupied business premises and investment properties held for rental income. Semi-commercial mortgages apply to mixed-use buildings where part of the property generates residential rental income and part is commercial — a ground-floor shop with flats above is the most common example.

All applications pass through a manual underwriting process. Rather than relying on automated credit scoring, Interbay’s underwriters assess the borrower’s financial position case by case — reviewing EBITDA, adjusted net profit, and going-concern valuations using MV1 (market value) and MV2 (market value subject to tenancy) methods. This approach adds time but enables Interbay to approve cases that would be rejected outright by an automated system.

Interbay also lends against multi-unit freehold blocks (MUFBs) held on a single title — a product that high-street banks rarely offer. Properties requiring light, medium, or heavy refurbishment are within scope, which makes Interbay relevant to investors managing value-add strategies alongside a standard refinance or purchase.

OSB Group Ownership and Structure

OSB Group PLC (OneSavings Bank) is an AIM-listed UK specialist mortgage lender that also owns Kent Reliance, Precise Mortgages, and Charter Savings Bank. The group holds full banking authorisation from the Prudential Regulation Authority and is subject to FCA supervision at group level. Interbay operates under this regulated parent structure, which provides borrowers and intermediaries with confidence in the lender’s capital adequacy and governance, even though the commercial mortgage products themselves sit outside FCA regulation.

OSB Group’s Q1 2026 results showed originations of £1.2 billion, an 11% increase year-on-year. The group has been actively repricing its product range to manage a volatile swap rate environment and to capture market share as some competitors have retrenched. Interbay cut its minimum loan size from £150,000 to £125,000 in late 2025 and introduced a new owner-occupier commercial mortgage product line during mid-2025, both moves that have broadened its addressable market.

Interbay Commercial Mortgage Rates and Fees

Interbay’s rates sit above what high-street banks advertise, which reflects the higher risk profile of the cases it takes on and the additional cost of manual underwriting capacity. The rate premium over mainstream lenders is real and borrowers should factor it into their investment return calculations. That said, rates have improved meaningfully over the past 12 months following OSB Group’s active repricing programme.

Current Interest Rates (April 2026)

Indicative rates as of April 2026:

  • Commercial owner-occupied: from 5.68% at 45% LTV
  • Commercial investment: up to 6.54% for selected products at higher LTVs
  • Semi-commercial: from 5.49%
  • Fixed terms available: 2-year, 3-year, and 5-year fixed rates
  • Variable rates: structured as a margin over the Bank of England base rate

Rates are LTV-sensitive and product-specific. A borrower at 45% LTV will access materially better pricing than one at 70% LTV. Interbay’s semi-commercial pricing currently leads the commercial range, which reflects the residential rental income component that partially offsets risk. Your broker will be able to run specific illustrations based on your property type, loan size, and LTV.

For context: mainstream high-street lenders such as HSBC and Barclays advertise commercial mortgage rates from approximately 4.45%, but those products are available only for clean-credit borrowers with standard property types. The rate difference against Interbay narrows significantly once complexity enters the picture, because most mainstream lenders will simply decline rather than price for it.

Arrangement Fees and Legal Costs

Interbay’s arrangement fee sits at between 1.5% and 5% of the loan amount, depending on the specific rate product selected. Lower-rate products tend to carry higher arrangement fees, so borrowers should ask their broker to run a true cost comparison across the product range rather than focusing on headline rate alone.

Valuation fees are paid directly to the lender on a set fee scale and are non-refundable once instructed. Legal fees follow a standardised scale; however, loans to limited companies or partnerships carry a minimum legal fee of £850–£1,750 depending on the complexity of the structure. SPV transactions with multiple directors or complex ownership chains tend to sit at the upper end of this range.

There is no requirement to hold an Interbay or OSB Group bank account as a condition of borrowing, which removes a barrier that some specialist lenders impose.

Loan-to-Value and Loan Size Limits

Interbay lends up to a maximum of 75% LTV across its commercial, semi-commercial, and bridging portfolios. The 75% ceiling applies to both purchase and refinance transactions. In practice, cases involving adverse credit, non-standard property types, or complex borrower structures may be offered at lower LTVs to reflect the aggregate risk position.

The minimum loan is £125,000 — reduced from £150,000 in late 2025, which brought a wider range of smaller commercial and semi-commercial transactions into scope. The maximum per property is £1.5 million to £5 million depending on the product and property type, and Interbay will lend up to £15 million to a single customer across a portfolio. For bridging loans, the minimum property value threshold rises to £133,000 (versus £75,000 for standard commercial and semi-commercial mortgages).

Interbay Commercial Mortgage Eligibility

Interbay’s eligibility criteria are deliberately broader than those of mainstream lenders. The product range is designed for borrowers and property types that fall outside standard credit models. Understanding what Interbay will and will not accept is essential before approaching a broker, as it avoids wasted time on applications that fall outside the lender’s core appetite.

Acceptable Borrower Types

Interbay accepts applications from a wide range of legal entities:

  • Individuals (sole name or joint)
  • Trading limited companies
  • Special Purpose Vehicles (SPVs) — the most common structure for property investment portfolios
  • Limited Liability Partnerships (LLPs)
  • General partnerships
  • Trusts
  • Pension schemes, including Self-Invested Personal Pensions (SIPPs)

The acceptance of SIPPs and trusts as borrower entities is notable. Very few high-street lenders will consider pension-scheme borrowing for commercial property, and the ones that do typically impose narrow property-type restrictions. Interbay’s willingness to engage with these structures — subject to manual underwriting — makes it a meaningful option for investors using tax-efficient property holding structures.

Property Types and Minimum Values

Interbay’s product range covers the following property categories:

  • Owner-occupied commercial premises (offices, retail, industrial, leisure)
  • Investment commercial properties held for rental income
  • Semi-commercial (mixed-use) properties with residential and commercial components
  • Houses in Multiple Occupation (HMOs)
  • Multi-unit freehold blocks (MUFBs) on a single title
  • Properties requiring light, medium, or heavy refurbishment

The minimum property value for commercial and semi-commercial mortgages is £75,000. For bridging loans, this rises to £133,000. Properties must be located in England, Wales, or Scotland. Interbay does not lend on properties in Northern Ireland or outside the UK.

The willingness to lend on properties requiring heavy refurbishment is a differentiator. Many specialist lenders draw the line at light or medium works; Interbay’s appetite for heavy refurbishment cases opens up a segment of the market — distressed assets, conversion projects, partially vacant commercial blocks — that requires a lender with manual underwriting capability and realistic going-concern valuations.

Credit Profile and Underwriting Approach

Interbay accepts applications from borrowers with adverse credit history, provided two specific conditions are met: no missed mortgage payments in the last 24 months, and no County Court Judgements (CCJs) over £500 registered in the last three years. Older adverse entries — settled CCJs, defaults, debt management plans that have concluded — are considered on a case-by-case basis rather than triggering an automatic decline.

The underwriting approach is fully manual. For owner-occupied commercial borrowers, Interbay assesses trading business income through EBITDA analysis and adjusted net profit calculations. For investment properties, the assessment focuses on rental coverage and the viability of the tenancy structure. Where a property is vacant or partially vacant, Interbay uses going-concern valuations (MV1 and MV2 methodologies) to establish a realistic security value rather than applying a blanket discount.

Complex cases — those involving multiple entities, cross-collateralised security, or unusual asset types — are referred to Interbay’s Transactional Credit Committee, which can structure bespoke solutions outside the standard product matrix. This committee route adds time but enables transactions that would be impossible under a standard approval process.

Interbay Commercial Mortgage Application Process

Interbay operates a strict broker-only model. There is no direct application route for borrowers, and Interbay does not publish rate tables or application forms for public access. All enquiries must come through an authorised intermediary — either a Key Partner that Interbay has a direct relationship with, or a specialist packager that has an arrangement with one of those Key Partners.

How to Apply Through a Broker

The first step is finding a commercial mortgage broker who has an active relationship with Interbay. Named Key Partners include specialist packagers such as 3mc and Advocate Finance, though the full list of authorised intermediaries is available through Interbay’s broker portal. A broker with a direct relationship will be able to discuss your case informally with Interbay’s BDM (Business Development Manager) team before submitting a formal application, which can save time if there are any unusual features that need pre-clearance.

Once a broker confirms that your case is within appetite, they will prepare the submission package and submit it to Interbay on your behalf. The lender does not charge for initial enquiries or Decision in Principle assessments.

Documents and Underwriting Timeline

A typical commercial mortgage submission to Interbay will require:

  • Two to three years of accounts for trading businesses (or SA302s for sole traders)
  • Latest three months’ business bank statements
  • Details of all directors, shareholders, or beneficial owners (for limited companies and SPVs)
  • Personal bank statements for individual borrowers
  • Details of existing property portfolio (schedule of assets and liabilities)
  • Tenancy agreements or projected rental schedules for investment properties
  • Property details including planning history and current condition

For complex borrower structures — trusts, SIPPs, partnerships — additional legal documentation will typically be required to establish the entity’s authority to borrow. Your broker will provide a specific document checklist once the case has been scoped.

Manual underwriting timelines are longer than automated decisioning. A straightforward commercial mortgage can reach formal offer in four to six weeks. Complex cases involving Transactional Credit Committee review may take eight to twelve weeks or longer. Interbay’s completion of a £54.5 million complex refinance across two central London office locations in 14 weeks illustrates what is achievable at the more complex end, but borrowers should build in realistic timelines for standard cases too.

Decisions in Principle and Case Management

Interbay uses a soft credit footprint at the Decision in Principle (DIP) stage, which means the initial assessment does not leave a visible mark on the borrower’s credit file. This matters for applicants who are exploring multiple lenders simultaneously or who have reason to be cautious about the volume of credit searches on their record.

Once a DIP is issued, the case is assigned to a dedicated case manager within Interbay’s underwriting team. The case manager is the primary point of contact for the broker throughout the process. Interbay has positioned this case management model as a differentiator — rather than a generic contact centre handling multiple files, a single underwriter follows the case through from submission to offer. In practice, intermediaries report that the quality of individual case management is one of Interbay’s more consistent strengths, though outcomes vary by team workload and case complexity.

Interbay Commercial Mortgage Repayments and Risk

Commercial mortgages are fundamentally different from residential mortgages in their risk profile. They are not regulated by the FCA, they involve larger sums, and the consequences of default are more immediate and severe. Borrowers should understand both the repayment structure and the lender’s approach to financial difficulty before committing.

Repayment Terms and Flexibility

Interbay offers both capital repayment and interest-only structures on its commercial mortgage products. Interest-only is widely used by property investors seeking to maximise monthly cashflow, but it requires a credible repayment vehicle — typically the sale of the property or a remortgage at the end of the term. Interbay will assess the viability of the repayment strategy as part of underwriting.

Fixed-rate terms of 2, 3, and 5 years are available. After the fixed period, the loan reverts to a variable rate structured as a margin over the Bank of England base rate. Variable rate products are also available from the outset for borrowers who want flexibility or expect to exit or remortgage within a relatively short timeframe. Early repayment charges (ERCs) apply during fixed-rate periods; the structure of these charges will be set out in your mortgage offer and should be reviewed carefully if there is any possibility of an early exit.

Loan terms vary by product and are agreed at underwriting. The lender does not publish a standard maximum term publicly, and individual cases may be structured differently based on the property’s income profile and the borrower’s exit plan.

Default Risk and What Happens If You Struggle

Commercial mortgages from Interbay are secured against the property. If repayments are missed and the account enters arrears, Interbay has the right to enforce its security and appoint a Law of Property Act (LPA) receiver — a process that can move faster than the equivalent residential mortgage arrears process, since these loans sit outside the FCA’s regulated mortgage framework.

Interbay does not have a published policy on forbearance for commercial borrowers. In practice, as with most specialist lenders, early engagement when financial difficulties emerge is strongly preferable to allowing arrears to accumulate. Your broker remains relevant even after drawdown — a good commercial broker can facilitate conversations with the lender if circumstances change.

Because these are unregulated products, borrowers do not have access to the Financial Ombudsman Service for complaints about the loan itself. Disputes must be handled through Interbay’s internal complaints process and, if unresolved, through the courts. This is standard for the commercial mortgage market, but it is worth understanding before committing.

Interbay Commercial Mortgage Customer Reviews

Interbay does not have a public Trustpilot profile. This is not an oversight — it reflects the nature of the lender’s business model. Interbay lends exclusively through intermediaries, which means it has no direct consumer relationship. Retail borrowers do not interact with Interbay independently; all contact flows through the broker. In this context, a consumer-facing review platform is not a meaningful signal of lender quality, and the absence of one should not be read as a negative indicator.

The more meaningful evidence base for evaluating Interbay is the intermediary market — what experienced commercial mortgage brokers say about the lender’s reliability, underwriting consistency, and case management quality.

What Intermediaries Say

Feedback from commercial mortgage brokers who work regularly with Interbay clusters around several consistent themes. On the positive side, the dedicated case management model is frequently mentioned as a strength — having a named underwriter who follows the case from DIP to offer reduces the friction that plagues large, centralised processing operations. Interbay’s willingness to take on genuinely complex borrower structures — SIPPs, trusts, SPVs with multi-layered ownership — is valued by specialist brokers who regularly encounter these client types. The soft credit footprint at DIP stage is also noted as helpful for applicants who are simultaneously exploring multiple lenders.

OSB Group’s Q1 2026 origination growth of 11% to £1.2 billion suggests that intermediaries are placing an increasing volume of cases with the group, which is a reasonable proxy for market confidence. The recently completed £54.5 million refinance of two central London office buildings — completed in 14 weeks and involving high ESG credentials — demonstrates the lender’s capacity to handle large, complex transactions alongside standard cases.

Common Concerns

The main concern raised by intermediaries is timeline predictability. Manual underwriting is inherently slower than automated processing, and complex cases can extend significantly beyond initial estimates when additional information requests or Credit Committee referrals arise. Borrowers with time-sensitive completions should discuss realistic timelines with their broker before submitting and should ensure that any purchase contracts allow adequate time for a specialist lender’s process.

The second recurring theme is rate competitiveness relative to other specialist lenders. While Interbay has repriced meaningfully over the past 12 months, brokers note that for cases that also fall within Shawbrook’s or Paragon’s appetite, a direct rate comparison is always worth running. Interbay does not consistently price as the cheapest specialist option, and the best outcome for borrowers depends on matching the case to the right lender rather than defaulting to any single provider.

Interbay Commercial Mortgage Support and Regulation

Interbay’s support infrastructure is built around the intermediary relationship rather than direct borrower access. This is consistent with its broker-only distribution model, but it does mean that ongoing support post-completion flows through the original broker or through direct contact with the assigned case manager.

Broker Support and Key Partners

Interbay maintains an active BDM (Business Development Manager) network that provides pre-submission support to authorised intermediaries. Brokers can discuss cases informally with BDMs before committing to a formal application, which is valuable for complex or borderline cases. Specialist packagers with direct Key Partner relationships — including 3mc and Advocate Finance — provide an additional layer of access for brokers who do not have a direct Interbay panel placement.

Interbay’s broker portal provides access to product guides, criteria documentation, and case tracking. The quality of digital tools in the specialist commercial lending space varies considerably; Interbay’s portal functionality is broadly adequate for the intermediary market it serves, though it does not match the digital sophistication of some larger mainstream lenders.

Regulatory Status and Complaints

Interbay’s commercial mortgage products are not regulated by the Financial Conduct Authority under the Financial Services and Markets Act 2000. Commercial mortgages and unregulated BTL mortgages to limited companies fall outside the FCA’s regulated mortgage scope. This is standard across the commercial lending market and is not specific to Interbay.

OSB Group PLC, Interbay’s parent, holds full banking authorisation and is regulated by both the FCA and the Prudential Regulation Authority as an authorised deposit-taker. OSB Group’s FCA and PRA registration provides oversight at the group level, including governance, capital adequacy, and conduct standards, even where individual products are unregulated.

Because commercial mortgage products are unregulated, borrowers do not have access to the Financial Ombudsman Service for product-related complaints. Complaints must be directed to Interbay’s internal complaints team in the first instance; if unresolved within eight weeks, the matter can be escalated through the courts. Borrowers seeking additional recourse should seek independent legal advice before committing to the loan.

Interbay Commercial Mortgages vs Alternatives

The specialist commercial mortgage market is relatively concentrated. A small number of challenger banks — Interbay, Shawbrook, Paragon — handle the majority of complex, non-standard cases. High-street banks remain the cheapest option for standard cases. The right choice depends on your specific borrower profile, property type, and timeline.

Interbay vs Shawbrook Commercial Mortgages

Shawbrook is Interbay’s closest structural peer. Both are specialist challenger banks operating in the commercial and semi-commercial mortgage space with broker-only distribution, manual underwriting capability, and acceptance of SPV and complex borrower structures. Key differences:

  • Light refurbishment: Shawbrook has expanded its use of Automated Valuation Models (AVMs) for light refurbishment cases, which can accelerate some transactions. Interbay relies on traditional valuation throughout.
  • Rate positioning: Rates at both lenders are broadly comparable at equivalent LTVs and case profiles, but differ product by product. A direct comparison through your broker is always worthwhile when both lenders are in appetite.
  • Minimum loan: Shawbrook and Interbay operate at similar minimum thresholds; both have moved in recent years to capture smaller commercial transactions.

For most complex commercial cases, both lenders should be on the shortlist, with the final selection determined by pricing, timeline, and which lender is more comfortable with the specific property and borrower profile.

Interbay vs Paragon Commercial Mortgages

Paragon Bank is another specialist lender with strong HMO and MUFB credentials. Like Interbay, Paragon operates through a broker-only model and uses manual underwriting for complex cases. Paragon has historically had a strong focus on professional landlord BTL and HMO portfolios, while Interbay covers a broader commercial property spectrum including owner-occupied commercial premises.

For HMO and MUFB transactions, Paragon and Interbay are both credible options, and a broker familiar with both panels will be well placed to advise on which is the better fit. For straightforward commercial owner-occupied mortgages and semi-commercial transactions, Interbay’s product breadth may give it the edge depending on the specific case characteristics.

Interbay vs High-Street Banks for Commercial Mortgages

High-street banks — HSBC, Barclays, NatWest — offer commercial mortgage rates from approximately 4.45%, which is materially cheaper than Interbay’s starting rates. However, this headline rate advantage comes with strict eligibility conditions that exclude the majority of complex commercial cases:

  • Credit profile: High-street banks require a clean credit history. CCJs, defaults, or missed payments in recent years typically result in an automatic decline.
  • Borrower structure: Most mainstream banks will not lend to SPVs, trusts, SIPPs, or complex partnership structures. Interbay’s acceptance of these entities is a genuine differentiator.
  • Property type: Mainstream banks generally restrict commercial lending to standard property types in strong locations. Mixed-use, heavy refurbishment, and non-standard property types are routinely declined.
  • Existing relationship: Some high-street banks require an existing business banking relationship as a condition of commercial mortgage lending.

If you qualify with a mainstream lender, the rate saving is significant and you should pursue that route. If you do not — because of your borrower structure, credit history, or property type — the comparison with Interbay is not meaningful, because the high-street option is not actually available to you.

Final Verdict: Are Interbay Commercial Mortgages Right for You?

Interbay earns its place in the specialist commercial mortgage market through a combination of genuine structural flexibility, manual underwriting capability, and the financial backing of OSB Group. It is not the cheapest option and it is not designed to be. Its value lies in what it will consider that others will not: SPVs, trusts, SIPPs, adverse credit histories, semi-commercial properties, MUFBs, refurbishment projects, and large portfolio exposures up to £15 million.

The broker-only model is non-negotiable — you cannot apply directly, and accessing Interbay without a broker who has a panel relationship is not possible. This adds cost and process, but it also means that your application arrives at the lender properly packaged, with a broker who understands the criteria and can manage the underwriting conversation on your behalf.

For property investors and business owners who have been declined by mainstream lenders, or who know from the outset that their structure or property type falls outside high-street appetite, Interbay is a credible, well-capitalised lender that deserves serious consideration. Work with a specialist commercial mortgage broker who knows the Interbay panel and can benchmark the terms honestly against Shawbrook and Paragon before you commit.

Bottom line: a strong specialist lender for complex commercial cases; not the right choice if you can access high-street rates, but one of the most capable options when you cannot.

Frequently Asked Questions

  • The minimum loan is £125,000. Interbay reduced this from £150,000 in late 2025, which brought a wider range of smaller commercial and semi-commercial transactions within scope. For bridging loans, the minimum property value is £133,000, which effectively sets a slightly higher floor for those products due to LTV limits.

  • Interbay lends up to 75% loan-to-value (LTV) across its commercial, semi-commercial, and bridging portfolios. In practice, cases involving adverse credit, non-standard property types, or complex borrower structures may be offered at a lower LTV to reflect the aggregate risk. Your broker will be able to advise on the realistic LTV available for your specific case based on informal discussions with Interbay’s BDM team before submission.

  • Yes, subject to two conditions: no missed mortgage payments in the last 24 months, and no County Court Judgements (CCJs) over £500 in the last three years. Older or less severe adverse entries — settled CCJs, satisfied defaults, concluded debt management plans — are assessed on a case-by-case basis rather than generating an automatic decline. This makes Interbay one of the more accessible specialist lenders for borrowers who have experienced historic financial difficulties but have since re-established a clean record.

  • Yes. Interbay explicitly accepts applications from Special Purpose Vehicles (SPVs), trading limited companies, LLPs, general partnerships, trusts, and pension schemes including SIPPs. This breadth of accepted borrower entity types is one of Interbay’s key differentiators, particularly for property investors who hold assets through SPV structures for tax efficiency. Limited company and partnership loans carry a minimum legal fee of £850–£1,750 depending on complexity.

  • Interbay is a direct lender — it provides the loan from its own balance sheet rather than sourcing funds from a panel of lenders. However, it operates exclusively through intermediaries and does not accept direct applications from borrowers. All applications must be submitted through an authorised broker or specialist packager who has a panel relationship with Interbay. If you contact Interbay directly, you will be referred to the intermediary channel. Finding a broker with an active Interbay relationship is the essential first step.

How We Reviewed Interbay Commercial Mortgages

This review draws on Interbay’s published product criteria, OSB Group’s Q1 2026 financial results and public regulatory disclosures, and the competitive context of the UK specialist commercial mortgage market as of April 2026. Rates and loan parameters have been verified against Interbay’s intermediary product guides for the current quarter. Competitor rates reference publicly available information from Shawbrook, Paragon, HSBC, and Barclays as of April 2026. We do not receive referral fees from Interbay or OSB Group. Our analysis is based on the published terms available to intermediaries; individual lending decisions depend on circumstances that only a qualified broker can assess against your specific case.