The 2025 lending landscape is forcing high-net-worth (HNW) individuals to reassess how they structure borrowing. Rising interest rates, regulatory caution and increased scrutiny of complex income profiles have reshaped the traditional mortgage process. At the same time, markets remain volatile enough that selling investments to fund property purchases, tax liabilities or liquidity needs can feel strategically counterproductive. This tension has revived interest in securities-backed lending, more commonly called Lombard lending, as an alternative or complementary route alongside traditional mortgages.

For wealthy borrowers with substantial portfolios, Lombard lending can offer speed, flexibility and liquidity that mortgages cannot. Meanwhile, mortgages remain one of the most stable and long-term-oriented lending products available. Understanding how both forms of finance work—and when each one is advantageous—has become essential for affluent clients seeking to manage their wealth holistically.

At Willow Private Finance, we increasingly see clients combining the strengths of both structures: a mortgage for long-term leverage and a Lombard line for liquidity, tax efficiency or timing advantages. This mirrors themes covered in our recent articles such as High Net Worth Mortgages in 2025: What Lenders Look For Beyond Income and Risks in Securities-Backed Lending: Margin Calls and Portfolio Risk Management, which explore how lenders’ attitudes are shifting across both markets.

This guide explains, in depth, the differences between securities-backed lending and mortgages; how each product functions in 2025; and how HNW borrowers can use both intelligently to strengthen their financial position, reduce unnecessary tax events and access liquidity without disrupting long-term investment strategy.

Market Context

Lenders have entered with a cautious but stable outlook. Interest rates remain elevated by post-inflation standards, and the Bank of England’s conservative stance on future cuts means mortgage affordability remains under pressure. Stress testing continues to limit loan sizes for many borrowers, even those who are asset-rich and income-modest—a common profile among entrepreneurs, investors and international clients.

Simultaneously, global investment markets have been unpredictable. While long-term prospects for equities and managed portfolios remain strong, short-term volatility has discouraged HNW individuals from liquidating assets unnecessarily. Many portfolios are diversified and structured with carefully planned tax and growth strategies. Selling them prematurely—perhaps to fund a property deposit—can disrupt long-term wealth planning and crystallise capital gains at the wrong moment.

This combination of tighter mortgage affordability and volatile markets has pushed sophisticated borrowers to explore alternative liquidity routes. Lombard lending has therefore surged in relevance: a mechanism enabling clients to borrow against portfolios without selling them, without triggering tax, and without disrupting exposure to long-term performance.

Mortgages continue to play a key role, especially for long-term leverage and predictable repayments. But in 2025, the interplay between these two products has become more nuanced than ever.

How Securities-Backed Lending Works

Securities-backed lending is, at its core, a simple concept: a private bank lends against liquid, high-quality investment assets. The borrower retains ownership of the portfolio, while the bank takes security over it. Because the collateral is liquid and easily valued, the bank typically offers highly competitive pricing and a streamlined approval process.

The structure feels very different from a mortgage. Instead of presenting income documentation, business accounts or tax returns, the borrower demonstrates the strength and composition of their investment assets. The underwriting centres almost entirely on asset quality, portfolio diversification, liquidity and the borrower’s overall wealth profile. For private banks, this form of lending is attractive because the collateral can be sold quickly if needed.

This simplicity and speed are key drivers of its popularity. A Lombard loan can often be arranged far faster than a mortgage—sometimes in a matter of days if the assets are already held with the lending institution. For HNW clients who want to move quickly on a property purchase, fund a deposit or capture a time-sensitive opportunity, this speed is invaluable.

Borrowers use the facility much like a revolving credit line, drawing down funds when required for a property purchase, tax bill or investment opportunity. Interest is only charged on the amount drawn. Once funds are repaid, the line can remain open for future use, functioning as a flexible liquidity tool.

The primary consideration, and the area requiring careful management, is the potential for margin calls if portfolio values fall. This is the central risk that distinguishes Lombard lending from property-backed borrowing.

How Traditional Mortgages Function for HNW Borrowers

Traditional mortgages remain one of the most effective long-term financing structures for property. Unlike Lombard loans, they are built around predictable repayment schedules, fixed or variable interest rates, and long-duration terms. They also provide stability rarely available through asset-backed loans, since property prices move slowly compared to equities or bonds.

For HNW borrowers, mortgages arranged through private banks offer greater flexibility than mainstream lenders. Private banks may evaluate affordability based on global assets, net worth or projected liquidity events rather than rigid income multiple rules. They may also allow interest-only arrangements or treat foreign income more flexibly, making them a preferred choice for many sophisticated clients.

Mortgages excel where long-term certainty is needed. They provide the ability to fix debt costs, avoid margin calls and utilise property as the primary security—an approach some borrowers prefer because the volatility profile of real estate feels more stable than that of a securities portfolio.

In short, mortgages continue to serve as the backbone of high-value property finance, particularly when borrowers want long-term stability rather than short-term liquidity.

When Securities-Backed Lending Outperforms Mortgages

The strengths of Lombard lending are most evident when liquidity, speed and tax efficiency matter more than long-term structure. A borrower who needs to exchange on a property within two weeks may struggle to obtain a mortgage in time. A Lombard line, secured against an existing investment portfolio, can allow them to complete the purchase and refinance later on their own terms.

Similarly, when selling investments would incur substantial tax liabilities or disrupt a well-performing portfolio, a Lombard loan provides a bridge—allowing the borrower to raise funds without materially adjusting their long-term investment strategy.

This financing route is also advantageous for international borrowers who may not yet meet UK mortgage lending criteria. A business owner relocating from Dubai or Singapore, for instance, may not have UK credit history, UK income or residency documentation, yet may have £5m+ in securities. A Lombard loan can facilitate the property purchase immediately, with the mortgage arranged later once residency and income structures are formalised.

Finally, during periods where mortgage rates are significantly higher than Lombard rates—as has sometimes been the case in 2025—a Lombard loan can simply be cheaper.

When Mortgages Are Preferable

Mortgages outperform securities-backed lending when predictability and duration matter more than speed or liquidity.

A borrower taking on a long-term residential home may not wish to be exposed to margin calls on their securities portfolio, especially if the loan is expected to be outstanding for many years. A mortgage fixed for five or ten years provides certainty, with repayments that do not fluctuate with market movements.

Mortgages are also more suitable when the borrower’s portfolio contains volatile assets. If a borrower holds a concentrated equity position or emerging-market investments, leveraging these assets to secure a Lombard facility may introduce unnecessary risk. In such scenarios, property-backed borrowing is usually more stable.

Mortgages are also preferable when the borrower wants to preserve their investment portfolio as an untouched asset base—whether for future liquidity needs, inheritance planning, or wealth preservation.

How HNW Borrowers Combine Both Structures

Increasingly, the most effective approach for affluent clients is not choosing between a mortgage and a Lombard loan but integrating both into a cohesive liquidity strategy.

A common example is using a Lombard loan to fund the deposit for a property purchase while the mortgage covers the balance. This avoids liquidating investments to fund the deposit and prevents unnecessary tax events. Once the mortgage completes, the borrower may repay the Lombard portion as and when it suits them.

Another approach involves completing the entire purchase with a Lombard facility to secure the property quickly. The borrower then refinances with a mortgage at a later date once conditions are more favourable—whether due to interest rate movements, updated income structures or timing preferences.

Some private banks even structure hybrid facilities intentionally, using both the property and the portfolio as security. This dual-collateral model is increasingly common in 2025, especially for ultra-high-net-worth borrowers seeking 100% financing structures.

Ultimately, combining both products provides the greatest flexibility: the speed and liquidity of Lombard lending, alongside the long-term stability of a mortgage.

Portfolio Strategy Considerations

Choosing between mortgage debt, securities-backed lending or a combination requires an understanding of wider wealth strategy. Borrowers should consider the volatility of their portfolio, the likelihood of future liquidity events, the duration of the borrowing requirement, and the potential tax impact of liquidating investments versus leveraging them.

Borrowers must also understand how a Lombard loan interacts with currency exposure, cross-border wealth and the composition of their investment holdings. Private banks typically offer higher advance rates on diversified, conservative portfolios and lower LTVs on concentrated or volatile positions.

Given these dynamics, Lombard loans are usually best suited to short- or medium-term liquidity requirements, while mortgages serve as the foundation for long-term leverage.

Outlook

Securities-backed lending and traditional mortgages are set to become increasingly complementary. Private banks continue investing in wealth-based underwriting models, giving them more ability to support HNW clients whose income structures defy traditional norms. Meanwhile, as markets normalise and interest rate expectations shift, borrowers will continue to use Lombard facilities to manage liquidity efficiently without compromising investment strategy.

In the years ahead, borrowers are likely to see more competitive pricing on Lombard loans, broader acceptance of ETFs and diversified managed portfolios, faster onboarding for international clients and more interest from private banks in blended security arrangements.

HNW borrowers who understand both tools—and how to use them together—will be best positioned to optimise leverage, manage tax exposure and finance property acquisitions strategically.

How Willow Private Finance Can Help

At Willow Private Finance, we specialise in designing bespoke lending structures for affluent clients—often blending securities-backed lending with private bank mortgages to achieve precise liquidity and wealth-management outcomes. For clients with complex international income, business ownership or significant investment portfolios, our role is to identify the right lender, negotiate key terms and coordinate every moving part of the transaction.

We work closely with private banks, investment managers and tax professionals to ensure that each facility supports your broader wealth strategy. Whether arranging a Lombard facility to fund a deposit, structuring a hybrid mortgage-plus-portfolio solution or helping you refinance a securities-backed loan into a long-term mortgage, Willow provides the expertise, discretion and market access required for sophisticated lending.

Our team has facilitated high-value transactions for clients across Europe, Asia, the Middle East and North America, ensuring a smooth process from structuring to execution.