APRIL, 2025
Asset-Based Mortgage (and Lombard Lending)
By Justin Whitelock
Founder of Mortgage London (a trading style of City Finance Brokers Limited, authorised and regulated by the Financial Conduct Authority, FCA No. 766295)
Asset-based mortgage is a broad label used for lending where the borrower’s assets play a major role in the credit decision instead of standard salary-led affordability alone. In UK practice, the phrase can refer to private-bank residential mortgages with asset-led underwriting, securities-backed Lombard facilities, or other asset-led structures. Despite the name, not every structure described this way is a regulated mortgage, and some are not mortgages at all. It is an umbrella label rather than a single standard product.
This extended definition explains what asset-based mortgage typically covers, the three structures that commonly sit under the label, and the regulatory distinctions between them. It does not address which structure is preferable in any given case, as that is a matter of individual circumstances.
Key Takeaways
- Asset-based mortgage is an umbrella label, not a single standard product. The term covers structures with materially different regulatory treatment.
- Private bank residential mortgage with asset-led underwriting is a regulated mortgage contract under FCA MCOB rules, with the consumer protections that apply to any UK residential mortgage.
- Lombard or securities-backed lending is typically not a regulated mortgage where the loan is not secured on UK residential property. It is secured on a portfolio of marketable securities held with the lender.
- Business asset-based lending finances trading businesses on the security of receivables, inventory, or plant; it is not a mortgage and is generally not relevant to UK residential property.
- Multi-currency considerations are central to most expat asset-backed cases, with foreign-currency assets supporting GBP-denominated UK property purchases.
The Three Structures Often Labelled Asset-Backed
The phrase asset-based mortgage has no standardised UK definition. As commonly used by brokers and clients, it refers to lending where assets, rather than salary-based affordability calculations, drive the credit decision. Three structures sit under the asset-backed banner:
A private bank residential mortgage with asset-led underwriting is a UK regulated residential mortgage secured against the property, where the lender weights investable assets, assets under management (AUM), and the wider banking relationship alongside, or in place of, standard income multiples. The loan remains a regulated mortgage contract under FCA MCOB rules. Where the borrower meets the FCA HNW thresholds (£300,000 income or £3 million net assets, excluding primary residence), tailored MCOB provisions can apply.
A Lombard loan is secured against a portfolio of marketable securities held in custody with the lender, rather than against property. Funds drawn down can be used to fund a UK property purchase, but the loan is not itself a mortgage and there is no charge on the property. Collateral is the portfolio. Lombard facilities, where not secured on UK residential property, are typically not regulated mortgage contracts under UK rules.
Business asset-based lending finances trading businesses through facilities secured on commercial assets such as receivables, inventory, or plant and machinery. It is a working-capital tool for trading companies and is generally not relevant to UK residential property purchases.
How Lombard Lending Works in UK Property Transactions
Lombard lending is the structure most often discussed in connection with asset-backed funding for UK property. The borrower pledges a portfolio of eligible securities to the lender, and the lender extends a credit line expressed as an advance rate against the pledged value. Funds can be drawn and repaid flexibly within the agreed limit, with interest accruing only on amounts drawn. Eligible collateral commonly includes listed equities, investment-grade bonds, mutual funds, and certain structured products held in custody with the lender.
A common practical pattern in cross-border HNW transactions is the bridging-the-gap structure: a UK regulated residential mortgage funds the bulk of a purchase, while a separate Lombard line provides deposit top-up, refurbishment funding, or transactional liquidity. The two facilities sit alongside each other, with the regulated mortgage carrying MCOB consumer protections and the Lombard line typically sitting outside MCOB.
Frequently Asked Questions
Is an asset-based mortgage a regulated mortgage in the UK?
Can a Lombard loan be used to fund a UK property purchase by an expat?
What investable assets typically count for Lombard lending?
Important Considerations
The information in this entry is general educational reference only and does not constitute regulated mortgage, tax, investment, or legal advice. Asset-backed and Lombard structures involve material risks including margin call risk, currency mismatch where the loan and collateral are in different currencies, and forced sale of pledged assets in adverse market conditions. Regulatory treatment varies by structure, and the consumer protections that apply to UK regulated mortgages do not generally apply to Lombard facilities. For personalised guidance, professional mortgage, tax, investment, or legal advice is appropriate.