InterBay Commercial Mortgages Review
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InterBay Commercial Mortgages Review

Specialist commercial and semi-commercial mortgage lender for complex cases: SPVs, adverse credit, mixed-use, HMOs. Broker-only. Verified July 2026.

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

Interbay Commercial Mortgages at a Glance

Interbay writes the commercial mortgages the high street declines: SPV borrowers, mixed-use and semi-commercial buildings, HMOs, multi-unit freehold blocks, and applicants carrying historic adverse credit. You cannot approach it yourself, because it lends only through intermediaries. Behind it sits OSB Group, the same parent as Kent Reliance, Precise Mortgages and Charter Savings Bank.

If a mainstream lender has already turned you down, Interbay is one of the small group of specialist challengers worth putting in front of a commercial mortgage broker. We checked its published pricing in October 2026: from 6.04% on semi-commercial products, and from 6.59% on owner-occupied commercial deals at 65% LTV. You will pay more than a high-street bank would charge, and there is no dressing that up. What the premium buys is manual underwriting, criteria that bend to the case, and structures most mainstream lenders will not look at.

Our Verdict

Put Interbay on the list whenever the thing stopping you is your structure rather than your numbers: SPV ownership, a pension scheme borrowing, a shop with flats over it, a credit file with history on it. Rates run above the high street and the broker you need adds its own cost and its own step, so none of that is free. It is also a lender with money behind it rather than a thin balance sheet: OSB Group wrote £1.2 billion of new lending in Q1 2026, up 11% on the year. Compare it against Shawbrook and Paragon, never on its own.

Clean credit, a standard property and a bank that will take the case? Get the high-street quote first and you will almost certainly take it. Everything Interbay is good at is wasted on a case a bank would have written anyway, and you pay for it in the rate.

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 had no missed secured-loan payments in the previous 12 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
  • Published loan bands: up to £25 million (term loans over £25m and bridging over £10m priced on application)
  • Maximum LTV: 75%
  • Rates from (October 2026): 6.04% (semi-commercial); 6.59% (commercial owner-occupied at 65% LTV); 6.99% (commercial investment)
  • Application route: Broker only, no direct applications
  • Parent group: OSB Group PLC (London Stock Exchange)
  • Regulated: Most commercial products fall outside FCA regulated-mortgage scope; see regulation section below

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 and Wales. 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.

Nothing here is credit-scored. A human reads your accounts, your profit after the adjustments an owner-manager business always needs, and a valuation taken two ways: what the building is worth, and what it is worth with the tenants that are in it. That is why a case a scoring model would bounce in seconds can still get through, and it is also why you wait weeks rather than days for the answer.

Interbay also lends against multi-unit freehold blocks (MUFBs) held on a single title, a product that high-street banks rarely offer. Its term mortgages need a property fit for immediate occupation, so projects that need works go through its bridging finance instead.

OSB Group Ownership and Structure

OSB Group plc is the listed holding company at the top of the structure, a FTSE 250 constituent that also owns Kent Reliance, Precise Mortgages and Charter Savings Bank. The bank inside the group is OneSavings Bank plc, and that is the company holding the deposit-taking licence. Interbay sits a step below it: a trading name of InterBay Funding Limited, company number 05595882, a wholly owned subsidiary of OneSavings Bank. We checked InterBay Funding’s own terms, and they say plainly that it is not an authorised firm under the Financial Services and Markets Act 2000.

Interbay needs no permission of its own because lending to a company against commercial premises is not a regulated activity to begin with. So the ownership buys you one thing and not another. It buys a lender funded off a licensed bank’s balance sheet, answering to that bank’s capital rules and its board. It does not buy you a single consumer protection on the loan you sign, and that is the half most borrowers assume the licence covers.

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 July 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

You will pay more here than a bank would charge, and on a twenty-five-year hold that gap compounds into real money, so price it into the yield before you commit rather than after. Interbay charges it because somebody reads every file by hand and because the cases it says yes to are the riskier ones. Pricing has come down over the past 12 months as OSB has repriced the range, but it has not closed on the high street.

Current Interest Rates (October 2026)

Indicative starting rates, verified against Interbay’s published product tables in October 2026:

  • Commercial owner-occupied: from 6.59% at 65% LTV
  • Commercial investment: from 6.99%
  • Semi-commercial: from 6.04%
  • Fixed terms available: 2-year and 5-year fixed rates
  • After the fixed period: the loan reverts to a variable rate set at a margin over the Bank of England base rate

Treat every one of those figures as the floor rather than the price. They are what Interbay gives its best case: the lowest gearing, the largest loan, the highest fee option. Borrow at 75% rather than 65% and the rate moves against you; so does a smaller loan, an unusual building, or a credit file with something on it. Semi-commercial leads the table at 6.04% only because the flats above the shop pay rent whatever happens to the business below, and that 6.04% is quoted on loans from £2.5 million up.

For context: mainstream high-street lenders such as HSBC and Barclays do not publish a headline commercial mortgage rate (checked October 2026); they price each case as a margin over a reference rate such as base rate, and their keenest pricing goes to 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

You choose your own product fee on the commercial range: 1%, 2% or 3% of the loan (October 2026). The catch is that the cheapest rates carry the 3% fee, so the two trade off against each other and the headline tells you nothing on its own. On a £500,000 loan the difference between the 1% and 3% options is £10,000 paid up front, and in Interbay’s current tables the lower rate takes the whole fix to win it back. Work out what each combination costs you across the fix, not across the full term you may never see out.

A £145 administration fee is due when the application goes in and is non-refundable. The valuation fee is paid by you or your broker straight to Interbay’s valuation panel manager when the valuation is instructed, and it is non-refundable once the valuer has visited. Interbay does not publish a legal fee scale: the panel solicitor quotes case by case, and you pay both sets of solicitors’ fees unless one firm acts for both sides. SPV transactions with multiple directors or complex ownership chains tend to need more legal work, so expect those quotes to be higher.

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

The ceiling is 75% on commercial and semi-commercial, 70% on bridging, and it applies whether you are buying or refinancing. Do not budget on it. The borrowers Interbay exists for are the ones least likely to get it: a credit file with history, an odd building, a layered ownership structure, and each of those pulls the offer down. If your deposit only works at 75%, establish early whether your case will actually be offered it, because a 65% offer on the same purchase is a different deal entirely.

The minimum loan is £125,000, reduced from £150,000 in July 2025, which brought a wider range of smaller commercial and semi-commercial transactions into scope. Published loan bands extend up to £25 million; term loans above £25 million, and bridging loans above £10 million, are priced on application (Interbay product guide, 9 September 2026). Bridging loans also start at £125,000, and semi-commercial mortgages need a minimum property value of £150,000.

Interbay Commercial Mortgage Eligibility

Two things decide whether Interbay can help you at all: what kind of legal entity is borrowing, and where the building is. It takes entities most banks will not touch, and it will not lend a penny outside England and Wales. Both of those are settled before anyone looks at your rate, so check them first.

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)
  • Partnerships: listed in Interbay’s product guide of 9 September 2026, though its online lending criteria list LLPs only, so check with your broker
  • UK family trusts, approved by solicitors
  • Pension schemes: Self-Invested Personal Pensions (SIPPs) and Small Self-Administered Schemes (SSAS), at up to 50% LTV

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

These are the buildings it will lend against:

  • 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
  • Refurbishment and conversion projects, through bridging finance

The minimum property value for semi-commercial mortgages is £150,000. Properties must be located in England or Wales. Interbay does not lend on properties in Scotland, Northern Ireland, the Channel Islands or the Isle of Man.

Interbay’s term mortgages need the property to be fit for immediate occupation, so a building that needs work is a bridging case first. Its own case studies show bridging used for exactly that: a commercial unit bought for heavy refurbishment into four flats, with the client moving to a long-term loan once the works were finished.

Credit Profile and Underwriting Approach

Two dates decide whether your credit file rules you out. Miss a secured-loan payment in the last 12 months and you are out. Pick up a CCJ or a default in the last 36 months and you are out. Anything older than that is read by a person rather than a scoring rule: a settled CCJ from four years ago, a default you cleared, a debt management plan you finished, and the answer can still be yes (owner-occupier criteria, October 2026).

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.

Cases that will not fit the product range at all, because several entities are involved, or because one property is securing another, go to a credit committee that can write terms from scratch. That is where the genuinely awkward deals get done. It is also the slowest route in the building, so if your case is heading that way, expect to be explaining your timetable to a seller.

Interbay Commercial Mortgage Application Process

Interbay operates a strict broker-only model. There is no direct application route for borrowers. 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, LLPs and, where accepted, 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.

Four to six weeks to a formal offer on a clean case, eight to twelve weeks or more once the credit committee is involved. Interbay publishes a £54.5 million refinance of two central London offices that took 14 weeks from enquiry to completion, and that is the honest shape of the complex end rather than a boast. Read those as weeks to an offer, not weeks to money: the legals come after, and they take time of their own. If you are buying with a contractual completion date, this is the number to argue about before you exchange.

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.

After the decision in principle your file gets one named underwriter who stays with it through to offer, and your broker deals with that person rather than with whoever answers a processing line. It sounds like a small thing and on a complicated structure it is not: nobody has to be brought up to speed on your SPV twice. What it cannot do is make a busy team faster.

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

You can repay capital monthly or pay interest only, and investors mostly take interest only because it frees up cash now. The bill does not disappear, though: at the end of the term the whole loan falls due in one piece, and you settle it by selling the building or by refinancing it with somebody. Interbay will want to hear which of those two it is before it lends, and you should want to be sure of it yourself, because a remortgage you were counting on is not a promise anybody has made you.

Every rate on the commercial and semi-commercial tables is a two-year or five-year fix; there is no variable product to start on. When the fix ends the loan tracks the Bank of England base rate at a margin, so budget for a payment you cannot see yet. Leaving early inside the fix costs you a penalty, and the amount is in your offer rather than on the website. Read it before you sign if there is any chance you sell, refinance or take the five-year because the rate looked better.

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

The loan is secured on the building, and if you fall into arrears Interbay can appoint a receiver over it. That receiver acts for the lender, not for you: they can collect your tenants’ rent and sell the property, and you do not get the forbearance timetable the FCA imposes on a residential mortgage, because this loan sits outside that regime entirely. It moves faster than most borrowers expect, which is the reason the next paragraph matters.

Interbay publishes no forbearance policy, so there is no stated process to fall back on and nothing you can hold it to. What that leaves you is the phone. Tell your broker the month you can see the problem coming, not the month after you have missed a payment, and let them take it to the case team: a lender deciding what to do with a struggling loan treats a borrower who warned it very differently from one it had to chase.

Where a commercial mortgage falls outside the FCA’s regulated-mortgage regime (which applies to most, though not all, Interbay commercial 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. See the regulation section below for more detail on when this may vary.

Interbay Commercial Mortgage Customer Reviews

Interbay’s Trustpilot profile carries 80 reviews and a score of 3.6 out of 5 (“Average”) as of October 2026, 22 of them posted in the previous 12 months. We read the profile rather than the headline score, and one line on it changes how much that score is worth: Interbay has not recently invited customers to leave reviews. Nobody is being nudged to post, so what you are reading is self-selected and will not cover the full spread of borrower experience.

Most of what is there is positive, with 55% at five stars, and Interbay answers 100% of its negative reviews rather than leaving them standing: that tells you somebody is reading them, and nothing about how the complaint was resolved. Eighty reviews is still almost nothing for a lender writing loans of this size, and on a sample that small I would ignore the star rating completely. Read the reviews and count the themes instead.

What Borrowers and Brokers Report

Praise clusters on two things: flexibility, and the quality of individual case handling. Reviewers describe extensions granted on purchase offers when completions slipped, BDMs who stayed with an application through a complicated structure, and a willingness to work with borrowers up against a deadline. Brokers single out the named-contact model: the same person from decision in principle through to offer, rather than whoever happens to pick up at a central processing desk.

The complaints run in one direction: delays. Several reviewers point to solicitor hold-ups during the legal completion phase, and a recurring theme is cases that ran well past the timeline quoted at the outset.

Slow legals are not an Interbay failing alone. Commercial completions involving specialist structures move at a different pace from residential transactions, and any lender in this market would tell you the same. But if your completion date is fixed, that distinction will not save the deal. Build in more buffer than you think you need, and have the realistic-timeline conversation with your broker before the application goes in.

Rate Competitiveness Against Other Specialists

Interbay is not reliably the cheapest of the specialists. We compared its published pricing against Shawbrook’s and Paragon’s and found no lender consistently ahead: it moves product by product and LTV by LTV.

So the lender to take is the one whose criteria your case fits most easily, which is often also the one that prices it best, rather than whichever name your broker reaches for first. Ask to see all three quoted on your actual loan amount and your actual LTV. A quarter of a point on £500,000 is £1,250 a year, every year you hold the building.

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.

The broker portal holds the product guides, the criteria documents and case tracking, so your broker can see where your file has got to without ringing anybody. It is a working tool rather than an impressive one, and it is nothing like a high-street bank’s system. For a lender whose answers come from underwriters rather than software, that matters less than it sounds.

Regulatory Status and Complaints

A loan secured entirely on commercial premises is generally not a regulated mortgage contract under FSMA 2000, so most of what Interbay writes sits outside the FCA’s mortgage rules. Every specialist lender in this market is in the same position, and so are the high-street banks, so this is not a reason to pick one over another. It does mean the protections you have on your own house do not travel with you here.

There are exceptions, and they are exactly the cases this lender specialises in. Buy a shop with a flat over it in your own name and live in that flat yourself, and the loan can fall inside the regulated regime, which would give you the Ombudsman and the FCA’s arrears rules on it. Which side of that line you fall on is a question for your broker to settle in writing before exchange, because nobody can tell from the property type alone.

Interbay itself is not authorised, and it has never claimed to be. The deposit-taker in the group is OneSavings Bank plc, which the Prudential Regulation Authority and the Financial Conduct Authority supervise between them in the ordinary way for a UK bank. That is real oversight of the bank’s capital, its governance and how it treats its customers. None of it reaches down to the loan you sign. A banking licence held further up the group is easy to read as cover on that loan, and it is not.

Where a commercial mortgage falls outside the regulated regime, the Financial Ombudsman Service is closed to you for product-related complaints. You complain to Interbay’s internal team first, and if the matter is unresolved after eight weeks your remaining route is the courts: slower, costlier, and a long way from the recourse consumers take for granted. That is the one thing I would want every commercial borrower to understand before signing, and it is worth taking independent legal advice on where the sums are large.

Interbay Commercial Mortgages vs Alternatives

The specialist commercial mortgage market is relatively concentrated. Interbay, Shawbrook and Paragon are three of the specialist challenger banks that take 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 such as HSBC and Barclays do not publish headline commercial mortgage rates, so you can only compare once you have a quote. Their pricing 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 LLPs. 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, properties needing major works, 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?

What you are buying from Interbay is a yes, not a rate, and that is the whole decision. It will look at an SPV, a family trust, a SIPP, a credit file with old defaults on it, a shop with flats above, a freehold block on one title, a building that needs gutting before anyone can trade from it, and loans in bands running up to £25 million. A bank will decline most of those without reading past the first page. You pay for the reading.

You cannot get at Interbay on your own. Contact it directly and it will send you back out to find an intermediary, and not any intermediary: one with a panel relationship or a route in through a packager that has one. That is a fee you would not otherwise pay and a step you would not otherwise take. What you get for it is somebody who knows the criteria before your file is read, which on a case this lender was built for is worth more than it costs.

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: take the high-street quote if you can get one. If you cannot, Interbay belongs on a shortlist of three with Shawbrook and Paragon, and the one that prices your case best is the one whose criteria it fits.

Frequently Asked Questions

  • The minimum loan is £125,000. Interbay reduced this from £150,000 in July 2025, which brought a wider range of smaller commercial and semi-commercial transactions within scope. Bridging loans also start at £125,000.

  • Up to 75% on commercial and semi-commercial mortgages, up to 70% on bridging. Treat 75% as the ceiling rather than the likely offer: the features that bring borrowers to Interbay in the first place, a credit file with history on it, an unusual building, a layered ownership structure, are the same features that pull the offer down. A case that would be 75% at a bank can come back at 65% here, which on a purchase is a materially bigger deposit, so settle it before you offer on anything.

  • Yes, subject to two conditions: no missed secured-loan payments in the previous 12 months, and no CCJs or defaults in the previous 36 months (owner-occupier criteria, October 2026). Older adverse entries (settled CCJs, satisfied defaults, concluded debt management plans) are assessed on a case-by-case basis rather than generating an automatic decline. That makes Interbay a realistic option 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, UK family trusts, and pension schemes including SIPPs and SSAS (at up to 50% LTV). 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. Legal fees are quoted case by case by Interbay’s panel solicitor, so expect a higher quote for a complex ownership structure.

  • 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

Rates, fees and criteria: we checked Interbay’s published product tables and intermediary guides in October 2026 and carried each figure we use in this review directly from that source. Rates move; your broker can pull a current illustration against the live product matrix before you commit to anything.

Customer sentiment: we read every Interbay Trustpilot review posted in the previous 12 months, not just the headline score, and summarised the recurring themes rather than cherry-picking quotes. The sample (80 reviews as of October 2026) is small for a lender at this scale; the patterns are more useful than the star rating.

Competitor rates: sourced from published product information from Shawbrook and Paragon as of July 2026. HSBC and Barclays publish no headline commercial mortgage rate (checked October 2026).

Disclosure: this review carries no affiliate links to Interbay or OSB Group; we do not receive referral fees or commission from either. BusinessExpert may earn a commission through other links on this page. Our editorial assessment of Interbay is independent of any commercial relationship. Individual lending decisions depend on circumstances only a qualified broker can assess against your specific case.