Why Cash-Rich Buyers Still Take Mortgages

Look, paying cash for a house feels like the cleanest move. No interest, no debt, no monthly statement landing in the inbox. And yet the buyers we watch most closely — the ones with the means to write the check on Tuesday and have it cleared by Thursday — keep choosing not to. The mortgage is back as a strategic tool at the very top of the market, and the reasons are more interesting than a textbook chart on leverage.

Knight Frank's 2025 Wealth Report puts mortgage take-up among ultra-high-net-worth property buyers at the highest level since 2008. The Royal Bank of Canada's private-banking arm reported a similar pattern across the Toronto and Vancouver markets last year. The Wall Street Journal ran a long piece in October about cash-rich New York buyers who took bridge financing on Tribeca and Upper East Side acquisitions even though their treasurers had told them not to. None of these buyers needed the loan to close. They wanted it.

The opportunity-cost argument

The cleanest version of the case is opportunity cost. A buyer with $5 million sitting in cash who acquires a property outright has put $5 million to work at whatever the property yields and appreciates at — call it a mid-single-digit total return in a normal year. The same buyer who finances 60 per cent and keeps $3 million liquid has redirected that capital into whatever else the family office is running, whether that's public equities, private credit, or a venture book. The math doesn't always favour the borrowed-money path, but it does often enough that the conversation has moved from "should we" to "how much."

Compass's private-client desk in Manhattan tells us the typical structure on a $10 million townhouse purchase now involves a 50 to 70 per cent loan, locked at the lowest jumbo rate the buyer's banking relationship will deliver. The remaining capital stays inside the wealth manager's broader allocation. The point isn't that property is a poor home for capital. The point is that capital concentration in a single illiquid asset is a different question from whether the asset itself is good.

The flexibility argument

The second reason is more textural. A mortgage holds a position open. If the buyer wants to sell three years in, the loan is paid out of the sale proceeds; the equity returns to the family office. If the property is held for fifteen years, the loan can be refinanced multiple times along the way as rates and balance sheets allow. The all-cash position is structurally more rigid: getting capital back out means a refinance against an already-purchased asset, which carries its own friction and timing constraints.

Sotheby's International Realty's 2024 ultra-prime survey found that 62 per cent of buyers above $20 million in the United States used some form of acquisition financing — mortgage, securities-backed loan against a marketable portfolio, or a structured private-bank facility. The same buyers self-described as "able to pay cash" in 71 per cent of cases. The gap is the strategic preference at work.

The currency and tax considerations

For international buyers, mortgage choice is also a currency decision. A Gulf buyer acquiring in London may finance in sterling to neutralise GBP/USD exposure on a property they intend to hold for a decade. A US buyer acquiring on the Côte d'Azur may take euro-denominated financing through a French private bank for the same reason. The currency match is more about hedging the natural exposure than about optimising rate. Coutts and HSBC Private Bank both offer cross-border facilities specifically structured around this need.

Tax structure is the third leg. In several jurisdictions — France, Spain, Italy, parts of the United States — interest deductibility on second-home or income-producing residential property still creates a meaningful spread between the after-tax cost of the loan and the property's underlying yield. The structure isn't universal, and the rules have been tightening in some markets, but where the deduction is intact it remains material to the calculation. Bordeaux, Provence, the Italian Lakes, and parts of the United States are still markets where this matters.

Where the case for cash still holds

Cash purchases haven't disappeared. They tend to concentrate in three situations. The first is competitive transactions: in Manhattan, Mayfair, and Hong Kong's Peak, an unconditional cash offer still moves a deal faster and at a meaningful price discount versus a financed offer. Brown Harris Stevens estimates the cash-offer discount in Manhattan at 3 to 5 per cent of headline price for the right property and counterparty. That spread can outweigh the carrying cost of the loan, especially on properties expected to be held under five years.

The second is regulatory: certain Swiss cantons, parts of Greece, and several Caribbean jurisdictions impose more friction on financed transactions, and the ownership-permit pathway is faster for cash buyers. Switzerland's Lex Koller framework is a textbook case — the foreign-buyer cantonal quotas tend to clear more cleanly when the transaction doesn't involve a domestic bank's approval cycle.

The third is the specific buyer who genuinely doesn't want exposure to debt. We hear this most often from buyers in the seventy-plus age band, who are managing for legacy and simplicity rather than yield optimisation. The estate-planning case here is perfectly defensible.

What private bankers actually advise

The advice we hear most consistently from senior private bankers — JPMorgan, Goldman Sachs Private, Morgan Stanley, the upper desks at the Swiss and London houses — is to think about the property as one position inside the broader balance sheet, not in isolation. Whether the buyer ends up financed or unfinanced is downstream of how the rest of the portfolio is structured, what the family office's liquidity needs look like over the relevant horizon, and how the asset's expected returns compare to the household's broader allocation menu.

That answer is less satisfying than a rule-of-thumb. It is also closer to how the buyers we watch actually decide. The textbook framing — "leverage amplifies returns" — is a starting point, not a recommendation. The more interesting work is everything that happens around it.

The buyer's takeaway

Cash-rich buyers take mortgages because the mortgage is a tool, not a necessity. It buys flexibility, currency-matching, tax efficiency, and the ability to keep the rest of the wealth working. The buyers using it well aren't optimising for any one of those things; they're optimising for a portfolio that holds together across a fifteen- or twenty-year horizon. The buyers we see making mistakes tend to be the ones who treat the mortgage as either a sin or a free lunch. It's neither. It's a structural choice with real trade-offs, and the right answer depends almost entirely on what the rest of the household's capital is doing.