What Carrying Cost Does to the Return You Think You Are Making

Property performance at this level is almost always quoted gross — the price it sold for against the price it was bought for. That figure omits every year of holding cost in between, and the omission is not small.

The three subtractions

Annual carrying cost, compounding across the hold period. A property held a decade carries ten years of it, and on a large estate that total can consume a substantial share of nominal appreciation.

Transaction friction at both ends. Purchase taxes and duties, legal and agency fees, and — at the trophy end — long marketing periods during which the property continues to cost money. Both entry and exit are expensive and the exit is slow.

Illiquidity. The market for very large properties is thin. Price is not what an index says; it is what the small number of qualified buyers will pay in the window when you need to sell.

Why the marketed figure survives anyway

Because the comparison is usually made against the wrong benchmark. A property that appreciates over a decade looks like a success in isolation. Against a liquid alternative over the same period, net of everything above, the picture is frequently less flattering.

This is not an argument against owning trophy property. It is an argument for being honest about which purchase it is: a consumption decision about how you want to live, or an investment decision that must clear a return hurdle. Most trophy purchases are the first wearing the language of the second.

The version that does work

Where the numbers hold up, it is usually because of one of three things: the property is genuinely scarce in a market with persistent demand, it is used enough that the carrying cost buys real utility, or it forms part of a broader structure with reasons beyond appreciation.

How to model it honestly

The correction is not complicated. It is simply that almost nobody does it, because the uncorrected version is more pleasant.

Start from total cost, not purchase price. Purchase price plus entry taxes and duties plus legal, agency and survey fees plus any structuring cost. That is what the position actually cost you on day one.

Add every year of carrying cost. Not an estimate of the obvious lines but the full figure built the way our Part 1 guide sets out, including the replacement reserve that most owners never accrue.

Subtract the costs of exit. Agency, legal, any exit taxes, and the carrying cost incurred during a marketing period that at this end of the market can run for years rather than months.

Then compare against a hurdle, not against zero. The question is never "did it go up". It is "did it beat what the same capital would have done elsewhere, after everything, over the same period, adjusted for the risk and the illiquidity". A property that appreciated while underperforming a liquid alternative has still lost you money in the only sense that matters.

Finally, adjust for inflation. A nominal gain across a decade of meaningful inflation may be a real loss. Property is quoted nominally almost universally, which flatters long holds systematically.

A worked example, with invented numbers

Every figure below is invented. They are not real prices, real costs or real returns for any market. They exist to show the arithmetic, and the arithmetic is the point.

Buy at 10,000,000. Suppose entry taxes, duties and fees come to 600,000, so the position costs 10,600,000.

Hold for ten years. Assume a flat carrying cost of 200,000 a year for simplicity: 2,000,000 over the decade.

Sell at 14,000,000 — a headline gain of 40%, which is the number that would be quoted. Suppose exit costs take 420,000, and an eighteen-month marketing period adds another 300,000 of carrying cost.

None of those cost assumptions is a benchmark. Entry taxes, exit costs and carrying cost differ widely by country and by property; the ones in your own model should come from the actual tax rules and invoices, not from this example.

Net proceeds: 13,280,000. Total outlay: 10,600,000 plus 2,300,000 of carry, or 12,900,000. The net gain is 380,000 on a position of 12,900,000 over ten years — under 3% in total, not 40%.

Now the honest counterweight. If you used the property for eight weeks a year and the equivalent rental would have cost 150,000 a year, you also consumed 1,500,000 of housing over the decade. Counted properly, the position looks very different — and that is exactly the correction the next section is about.

The same arithmetic with real tax rates: London

The figures above are invented. Here is the tax part rebuilt from HMRC's published rates, for a £10,000,000 house in England bought by a buyer who is not UK resident and already owns a home elsewhere, and sold ten years later for £14,000,000. Our arithmetic; costs other than the two taxes are left out, and the sale price is an assumption, not a forecast.

The two taxes alone equal 69% of the £4,000,000 headline gain, before a single year of carrying cost, agency or legal fees. The simplification cuts both ways: it ignores any deductions that may reduce the taxable gain, and the 24% rate assumes the whole gain falls in the higher band. Sources: HMRC, SDLT residential rates and HMRC, Capital Gains Tax rates; the full English rules are in our London dossier.

The imputed rent argument, which is the strongest case for

The fair objection to everything above is that it treats a home as though it produced nothing. It does produce something: you lived in it.

Economists call this imputed rent — the value of the housing services you consumed by occupying a property you own rather than renting an equivalent. It is real, it is often large, and leaving it out of the calculation understates ownership just as badly as leaving out carrying cost overstates it.

The discipline is to count it honestly rather than generously. Value it at what you would actually have paid for an equivalent property for the weeks you actually used it — not at what the property could theoretically let for over a full year you would never have booked.

Done that way, a heavily used property frequently justifies itself and a lightly used one frequently does not. Which is the same conclusion the staffing and systems piece reaches from the cost side, arrived at from the benefit side.

Currency, the subtraction nobody models

Where a property sits in one currency and your wealth is measured in another, you hold two positions: a property position and a currency position. Most owners model only the first.

The effect works in both directions and it is not small over a decade. A property that rose in local terms can be flat or down in your home currency, and the carrying cost you paid every year was paid at whatever rate applied that year rather than at the rate on the day you bought.

If the currency exposure is unintended, it is worth naming it as a separate decision rather than accepting it as a side effect of liking a house.

Leverage cuts both ways

Debt magnifies the outcome in both directions, and at this end of the market that deserves more caution than it usually gets.

On the way up, borrowing improves the return on the equity actually committed. On the way down, or in a flat market where carrying cost accumulates, it does the reverse — and it does so against an asset that cannot be sold quickly. The combination of high fixed carrying cost, thin liquidity and debt service is the specific mechanism behind most distressed trophy sales, and distressed sales are where the losses actually happen rather than in the index.

The mitigation is not to avoid debt but to stress-test it against the bad year: a repair, a soft market, a currency move and a change in income arriving together.

What to ask before you call it an investment

• What is the total entry cost, including taxes, duties and fees, as a percentage of price?
• What is the modelled annual carrying cost, including a replacement reserve?
• What is the realistic marketing period for a property like this in this market?
• What are the exit costs, including any tax on gain in the country where the property sits?
• What return would the same capital need to make elsewhere to beat this, after everything?
• In which currency is the exposure, and is that exposure intended?
• How much imputed rent will you genuinely consume, valued at the weeks you will actually use?
• What happens to the position if you need to sell in a year when nobody is buying?

For the market-selection side of that, see ultra-prime cities with the fastest appreciation, and for the financing and structuring side, private banking for real estate investors.

This is general commentary on how holding costs affect outcomes, not investment or tax advice — positions differ by jurisdiction and by structure.

Back to Part 1.

Frequently asked questions

Why is property performance at the trophy level almost always quoted gross?

Property performance is usually quoted gross by comparing the purchase price against the selling price. This method omits every year of holding cost in between, such as annual carrying costs, purchase taxes, legal and agency fees, and long marketing periods, which can consume a substantial share of nominal appreciation.

What are the three main subtractions to account for when holding a large estate?

The three main subtractions are annual carrying costs compounding across the hold period, transaction friction at both entry and exit including taxes and legal fees, and market illiquidity because the number of qualified buyers for very large properties is thin and selling quickly is difficult.

How can you model a trophy property purchase honestly from day one?

To model honestly, start from total cost rather than just purchase price. Add entry taxes, duties, legal, agency, and survey fees, and any structuring cost. Then add every year of carrying cost including a replacement reserve, subtract exit costs, and compare the result against a liquid alternative.

What is imputed rent and how does it affect the calculation of owning a property?

Imputed rent is the value of the housing services consumed by occupying a property you own rather than renting an equivalent. Leaving it out understates ownership. To count it honestly, value it at what you would actually pay for equivalent accommodation for the specific weeks you use it.

What happens when debt is used to finance a trophy property in a flat market?

Debt magnifies outcomes in both directions. In a flat market or during a downturn, borrowing reverses returns because carrying costs continue to accumulate against an illiquid asset. This combination of high fixed carrying costs, thin liquidity, and debt service causes distressed trophy sales.

How much tax would a foreign buyer pay on a £10 million London house?

At HMRC's published rates, a non-UK resident who already owns another home pays £1,813,750 of Stamp Duty Land Tax on a £10,000,000 house in England, or 18.1% of the price. Selling ten years later for £14,000,000 would add £959,280 of Capital Gains Tax at 24%, before any deductions.