Emergency Reserves for High-Net-Worth Individuals: A Different Approach

Personal finance guides consistently recommend keeping three to six months of living expenses in an accessible cash account as an emergency fund. For someone earning £50,000 a year, that means holding £12,500 to £25,000 in cash. Sensible, relatively cheap advice.

For high-net-worth individuals, the same principle leads to a very different number. Six months of living expenses for someone spending £300,000 a year means £150,000 sitting in cash. For a family spending £600,000 a year — not unusual among internationally mobile HNW individuals with multiple homes and children at international schools — six months of reserves means £300,000 in cash. At current interest rates, that represents a meaningful opportunity cost compared to capital invested in higher-returning assets.

The question is not whether to maintain liquid reserves — liquidity is genuinely important — but how to structure those reserves intelligently.

Why HNW Individuals Need Liquid Reserves

Before examining the structures, it is worth being clear about what an emergency reserve is for. The purposes are:

1. Income disruption: if employment, business distributions, or investment income is temporarily reduced or delayed, cash reserves bridge the gap without requiring forced asset sales
2. Unexpected large expenses: medical emergencies, urgent property repairs, legal costs, unexpected family obligations
3. Investment opportunities: the ability to act on attractive investment opportunities quickly without waiting for existing positions to be liquidated
4. Margin call liquidity: for investors with leveraged positions (mortgages, Lombard facilities), maintaining cash to cover potential margin calls or loan repayments if markets move adversely

For internationally mobile HNW individuals, there is an additional dimension: currency. An emergency fund in a single currency may be inadequate if living expenses span multiple countries. A UAE-based individual whose income is in AED but who has a UK property with sterling costs and children at a school with fees in sterling needs reserves in the right currencies, not just the right amount.

The Cost of Lazy Cash

Large cash balances left in standard current accounts or savings accounts earn below-market rates. At the scale HNW individuals deal with, this matters.

The FSCS (Financial Services Compensation Scheme) protects deposits up to £120,000 per institution per person (raised from £85,000 on 1 December 2025), or £240,000 for joint accounts. This means that a cash reserve of £300,000 at a single UK bank has only £120,000 protected. If you wish to maintain FSCS protection across your full reserve, you need to spread across multiple institutions — administratively cumbersome and often not done.

Beyond FSCS, the practical question is: what is the most efficient way to hold liquid reserves that earns reasonable returns without exposing capital to meaningful risk?

Options for Structuring HNW Emergency Reserves

1. Premium Bank Accounts and Treasury Deposits

Some private banks and specialist cash management services offer tiered deposit accounts or Treasury-style products that aggregate deposits across multiple institutions on behalf of the client. Services such as Flagstone, Insignis Cash, and Hargreaves Lansdown Active Savings act as platforms placing client cash across a network of FSCS-protected banks, maintaining protection limits while maximising rates.

These platforms allow a single relationship to hold £1 million or more in protected deposits spread across institutions, earning competitive rates. They are a clean solution for the cash component of an HNW reserve.

2. Money Market Funds

A money market fund invests in short-duration, high-quality debt instruments (government Treasury bills, bank commercial paper, repos). They provide:

• Daily liquidity (same-day or next-day access in most cases)
• Returns that track short-term interest rates more closely than bank deposits
• Preservation of capital (though they are not "guaranteed" in the way FSCS deposits are)
• Available in sterling, dollars, euros, and other currencies

For amounts above the FSCS threshold that need to remain liquid, a money market fund is often a better home than a bank deposit. Returns are typically close to the Bank of England base rate (or the equivalent for the fund's currency). The main risk is counterparty risk within the fund's underlying holdings, though institutional-grade money market funds invest in high-quality short-dated instruments with diversified counterparty exposure.

3. Short-Duration Bond Funds

For reserves with a slightly longer anticipated holding period (six months to two years), a short-duration investment-grade bond fund can provide returns modestly above cash with limited interest rate risk. These are not suitable for reserves that may need to be accessed at very short notice, as they carry some mark-to-market volatility.

4. The Lombard Facility as an Emergency Reserve Substitute

One of the most effective strategies for HNW individuals is to rely on a Lombard facility (securities-backed lending line) rather than maintaining a large cash buffer.

Under this approach:

• The bulk of the emergency reserve is invested in a diversified liquid investment portfolio (equities, bonds, funds) generating market returns
• The investor maintains an undrawn Lombard facility against this portfolio
• In the event of an emergency requiring liquidity, the Lombard facility is drawn — providing access to cash without the need to sell investments

This approach converts the opportunity cost of holding cash into the cost of maintaining an undrawn credit facility (typically a small commitment fee) plus the interest cost of any actual drawings. For a well-managed HNW portfolio, the difference between investment returns on the portfolio and the interest cost of occasional Lombard drawings is likely to be significantly positive over time.

The risks of Lombard facilities — particularly margin call risk — are discussed in more detail in our guide to HNW mortgages. The facility should not be drawn permanently; it should be a bridge to a more deliberate liquidity solution.

5. Currency of Reserve for Internationally Mobile Expats

For individuals whose living costs span multiple currencies, structuring the reserve correctly requires currency analysis.

A simple approach: maintain reserves in proportion to spending currency. If 50 per cent of spending is in AED/USD and 30 per cent is in GBP and 20 per cent is in EUR, the reserve should broadly mirror this. Holding the entire reserve in sterling when a significant portion of expenses are in dollars exposes the reserve to currency risk at exactly the moment it may be needed most.

Multi-currency money market funds or multi-currency deposit platforms address this by allowing cash to be held in multiple currencies in a single relationship.

How Large Should the Reserve Be?

There is no universal answer for HNW individuals. Key factors:

• Regularity and predictability of income: someone with predictable dividend income from a diversified portfolio needs less cash than an entrepreneur whose distributions are lumpy and unpredictable
• Leveraged positions: if you have mortgage debt or Lombard facilities outstanding, you need greater liquid reserves to withstand a potential margin call or rate shock
• Fixed obligations: school fees, property running costs, staff costs — these cannot easily be deferred and require predictable liquidity
• Investment opportunities: if you actively deploy capital into time-limited investment opportunities, a larger reserve gives you the flexibility to act

As a rough framework: one to three months of core fixed expenses in immediately accessible cash (deposits or money market funds), a further three to six months in short-duration liquid assets (short-dated bonds or money market funds), and a Lombard facility headroom of 20 to 30 per cent of portfolio value for opportunistic or emergency use.

Investments can fall as well as rise in value. Money market funds are not guaranteed in the same way as bank deposits. Lombard facilities can be called in by the lender at short notice. Rules on FSCS protection change. Seek professional advice on the appropriate approach for your circumstances.

How Global Investments Can Help

Global Investments advises HNW clients on structuring liquid reserves intelligently — balancing the genuine need for accessible funds against the opportunity cost of excessive cash holdings. We work with specialists in cash management, short-duration fixed income, and Lombard lending to design a reserve strategy that fits your income profile, currency requirements, and overall financial plan.

If you are unsure whether your current cash holdings are earning appropriate returns or are structured for the right currencies, contact us to arrange a review.