UHNW Lending: Lombard Loans and Portfolio Financing

One of the most powerful yet least-publicised tools in UHNW wealth management is the ability to borrow against an investment portfolio — using the portfolio as collateral for a credit line or term loan. Known variously as a Lombard loan, portfolio-backed loan, securities-backed lending, or margin lending (at the retail level), this category of borrowing offers wealthy investors a way to access liquidity, fund investments, or manage tax-sensitive disposals without requiring the sale of assets.

Used prudently, portfolio financing can be genuinely value-enhancing. Used carelessly, particularly with excessive leverage relative to the portfolio's volatility, it can cause substantial capital loss and force sales at the worst possible time. This article sets out how these facilities work, the economics involved, and the risk management disciplines required.

What Is a Lombard Loan?

The term "Lombard" has historical roots in European banking, referring to the practice — pioneered by Italian merchant bankers in mediaeval Europe — of lending against pledged assets rather than personal creditworthiness. In modern private banking, a Lombard loan is a credit facility extended to a client against the security of their investment portfolio held in custody at the lending bank.

The borrower pledges some or all of their investment portfolio as collateral. The bank advances cash — typically up to 50–70% of the pledged portfolio's value, depending on the assets held. The borrower pays interest on the drawn facility and is free to use the proceeds for any purpose: funding an investment, acquiring property, bridging a business transaction, or managing living expenses during a period when selling assets would be tax-inefficient.

The portfolio typically remains invested throughout, continuing to generate returns. The bank retains the right to sell pledged assets if the portfolio value falls below defined minimum levels — the margin call mechanism.

How Lombard Loans Are Structured

Loan-to-Value (LTV) Ratio

The maximum loan amount is calculated as a percentage of the eligible collateral value. LTV ratios vary by asset type:

• Cash and money market funds: typically 90–95%
• Investment-grade bonds and gilts: typically 70–85%
• Developed market equities (large-cap): typically 50–70%
• Investment funds (equity): typically 50–65%
• Less liquid or concentrated positions: typically 30–50% or excluded
• Private equity, property, and illiquid alternative funds: typically excluded or specially negotiated

Blended across a typical diversified portfolio, available borrowing capacity might represent 50–60% of total portfolio value.

Interest Rates

Lombard loan interest rates are typically set at a margin over the relevant base rate (SONIA in sterling, SOFR in dollars, EURIBOR in euros). Margins vary depending on the client's relationship, portfolio composition, loan size, and currency. As of 2026, after a period of higher base rates, all-in rates for well-secured Lombard facilities in sterling range from approximately 4.5% to 7% per annum, depending on facility size and bank relationship.

For UHNW clients with established private banking relationships, rates are negotiable. Large, well-secured facilities — say, £10 million against a £30 million portfolio of diversified liquid assets — are routinely priced at the lower end of the range.

Margin Calls

The most important risk feature of a Lombard loan is the margin call. If the value of the pledged portfolio falls below a defined trigger level — the maintenance LTV, typically 75–80% of the maximum LTV — the bank will require the borrower to either:

1. Deposit additional collateral or cash to restore the LTV to acceptable levels
2. Reduce the loan balance through repayment
3. In default of either, allow the bank to sell pledged assets to reduce the loan

In a market stress scenario — when asset prices fall sharply and quickly — margin calls can become self-reinforcing: forced sales by multiple over-leveraged borrowers depress asset prices further, triggering additional margin calls, creating a downward spiral. This is the fundamental systemic risk of portfolio lending, and it is also the fundamental individual risk to the borrower.

The 2022 UK liability-driven investing (LDI) crisis — in which pension funds with leveraged gilt portfolios faced simultaneous margin calls during the Truss government's mini-budget market turmoil — is a vivid illustration of how rapidly margin call dynamics can materialise.

Uses of Lombard Facilities

Property Acquisition

A common application is to use a Lombard facility to fund a property deposit or, in some cases, an entire property acquisition while a longer-term mortgage is arranged. This avoids selling investment assets — potentially at an inopportune time or with adverse tax consequences — while allowing the borrower to move quickly in a property transaction.

Bridging Investment Opportunities

A UHNW investor who identifies a private equity co-investment opportunity requiring prompt capital commitment may use a Lombard facility to fund the investment, subsequently repaying the loan through regular income, a planned asset sale, or a capital event. The portfolio loan provides the liquidity flexibility to act quickly without having to liquidate other positions.

Tax-Efficient Liquidity

Selling a portfolio generates a capital gains tax liability on any accumulated gains. Borrowing against the portfolio generates no tax liability. An investor who needs £2 million of liquidity but has a portfolio with large embedded gains may prefer to borrow rather than sell, deferring the tax liability until a more advantageous time — for example, a future tax year when income is lower, or after a move to a jurisdiction with no capital gains tax.

This strategy requires careful planning: the borrowing costs must be weighed against the tax saved, and the interest payments must be manageable from current income or other sources.

Short-Term Cash Flow Management

High earners with irregular income — entrepreneurs with lumpy dividend payments, professionals with large annual bonuses — may use a Lombard facility to smooth cash flow through the year, drawing down when needed and repaying when income arrives.

Portfolio Financing Beyond Lombard Loans

Several other forms of financing are available to UHNW clients using their wealth as collateral.

Prime Brokerage

Hedge funds and sophisticated traders use prime brokerage — a bundled service offering custody, clearing, and leveraged financing from major investment banks. Institutional prime brokerage is not typically available to individual investors, but some private banks offer similar facilities to UHNW clients with managed accounts.

Subscription Finance Lines (Capital Call Facilities)

For investors with significant private equity fund commitments, subscription finance lines allow borrowing against the uncalled capital commitments pledged to the fund, rather than against fund assets themselves. This facility is typically used by the fund (not the LP) but some private banks offer individual LPs a variant of this structure.

Real Estate Secured Lending

Where property is the primary asset, a more traditional mortgage or portfolio property facility is typically more cost-effective than a Lombard loan, as property can be pledged more directly and at appropriate terms. Bespoke mortgages for UHNW clients — large loan sizes, interest-only terms, multiple currencies, complex income structures — are offered by specialist private banks and mortgage advisers.

Risk Management Disciplines

For investors who choose to use portfolio leverage, the key discipline is conservatism relative to the maximum available. Borrowing 60% of portfolio value against a limit of 70% provides a meaningful buffer. Stress testing the portfolio — asking "how much would the portfolio have to fall before a margin call is triggered, and how likely is that scenario?" — is essential. A portfolio with a maximum LTV of 65% and a maintenance trigger of 50% has very limited headroom before margin calls materialise in a significant market decline.

Key risk management rules for Lombard borrowers:

• Never borrow more than 30–40% of portfolio value against a diversified portfolio
• Do not borrow against concentrated, illiquid, or volatile positions
• Maintain a liquidity buffer (cash or near-cash) outside the pledged portfolio to meet margin calls without forced sales
• Ensure the interest cost can be covered from income, not solely from portfolio growth assumptions
• Have a clear repayment plan, not an open-ended dependency on the facility

How Global Investments Can Help

Global Investments assists HNW and UHNW clients in evaluating and accessing portfolio financing — identifying which assets provide the best basis for a Lombard facility, benchmarking terms across private banks, and structuring the borrowing in coordination with the client's wider tax and investment plan.

We work with major private banking groups active in the UK, Channel Islands, Switzerland, UAE, and Singapore to source competitive Lombard terms for our clients, and we provide independent oversight to ensure that leverage levels remain within prudent parameters. Contact Global Investments for a discussion of whether portfolio financing is appropriate for your circumstances.

This article is for information purposes only and does not constitute financial or investment advice. Portfolio financing involves significant risks including the potential for forced asset sales and capital loss. It is suitable only for investors who fully understand these risks and have appropriate liquidity reserves. Borrowing to invest increases both potential gains and potential losses. Professional advice should be sought before entering any leveraged financing arrangement.