The Arithmetic Nobody Multiplies

Up to 100 days. Around 100 entities.

Two numbers from other people's research that nobody multiplies.

McKinsey set out the bank-side baseline in 2022: onboarding a new corporate client can take up to 100 days, with a case manager collecting up to 100 documents and information for 150 data fields.

Morgan Stanley's 2025 survey of US family offices counted the other side: on average 100.7 entities supported per office, 156 for offices with a billion dollars or more under management.

The arithmetic is not simple multiplication. Onboardings overlap, and not every trust meets every bank. The order of magnitude is the point.

And the eighth entity is often harder than the first. Each one arrives with the same ownership chart, the same passports, the same source of wealth narrative, often at an institution that has already seen all of it under a different name. Too often nothing carries across. By the eighth, the structure looks complicated, and complication reads as risk.

The regulation was never what took six months. What took six months was doing the same reading eight times by hand. A structure can be read once, as a structure, and then verified at the level of each payment. The checks are no lighter. They are just not repeated.

If you run a multi-entity structure: how many times did you hand over the same ownership chart last year?

From our piece in Private Wealth Voices, the Prestel & Partner magazine.

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