SKN | U.S. Banks Are Rewriting Third-Party Risk Rules: What HNW Families Should Understand

Key Takeaways

• U.S. banking regulators have proposed replacing existing third-party risk guidance with a more risk-based framework that would require banks to focus resources on relationships capable of creating material financial, operational or compliance harm.
• The proposed approach moves away from treating every vendor, fintech or technology provider as equally risky and toward supervision calibrated to the bank, the relationship and the potential consequences of failure.
• For HNW families, the development matters because private banking increasingly depends on external technology, custodians, payment providers, cloud infrastructure, investment platforms and specialist service providers.
• The strategic response is not to eliminate third parties, but to understand where hidden dependencies sit inside a banking relationship and whether those dependencies could affect access to liquidity, custody, payments or sensitive information.

The infrastructure behind a private-banking relationship is becoming as important as the institution carrying the family name. U.S. banking regulators have now proposed a new framework for third-party risk management designed to replace existing guidance and give banks greater flexibility to calibrate oversight according to actual risk. For HNW families, the significance extends well beyond U.S. regulatory policy. As private banks increasingly rely on fintechs, cloud providers, payment networks, external asset managers and specialist technology, the resilience of a wealth structure increasingly depends on institutions the client may never see.

Look Through the Bank to Its Critical Dependencies

A private bank can appear highly diversified while depending heavily on a relatively small number of external providers. Core banking software, cybersecurity, cloud infrastructure, payment processing, identity verification, market-data systems and outsourced investment technology can all sit outside the bank’s direct operational perimeter.

The proposed U.S. framework is built around a simple principle: the intensity of oversight should correspond to the magnitude and likelihood of harm associated with the relationship. That represents a move away from process-heavy supervision toward prioritisation based on actual risk.

For HNW clients, this creates a useful question for private-bank due diligence: which third parties are genuinely critical to the services supporting the family’s wealth?

Operational Risk Is Becoming a Wealth-Preservation Issue

Operational resilience is often treated as an institutional concern. At the private-client level, it becomes tangible when a technology failure interrupts payments, a cyber incident restricts account access, a service-provider failure delays securities processing or an external platform creates a reporting problem across multiple jurisdictions.

This is particularly relevant for globally mobile families. A family may maintain accounts in Switzerland, the United States and Europe while relying on technology infrastructure operated by the same external provider. Apparent geographic diversification can therefore conceal technological concentration.

The objective should be to distinguish between jurisdictional diversification and infrastructure diversification. They are not the same thing.

Ask What Happens When a Critical Provider Fails

A sophisticated banking review should go beyond asking whether the bank has a third-party risk policy. The more important question is whether the bank has credible alternatives when a critical provider becomes unavailable.

For an HNW relationship, this means understanding contingency arrangements around payments, securities custody, reporting, communications, cybersecurity and liquidity access. Where the bank relies on an external provider for a critical function, continuity should be demonstrable rather than assumed.

This becomes particularly important when several family entities use the same institution. A single technology or service-provider disruption can otherwise affect personal accounts, trusts, investment companies and operating businesses simultaneously.

Do Not Mistake Less Process for Less Risk

The proposed framework is explicitly designed to reduce overly broad, process-driven approaches. It is also non-binding and would not itself create prescriptive requirements. That distinction matters.

A lighter supervisory framework does not automatically mean a weaker banking relationship. In fact, sophisticated institutions should be capable of tailoring controls without sacrificing resilience. The relevant measure for a private client is the quality of the outcome: whether the bank understands its dependencies, identifies critical providers and maintains credible contingency arrangements.

Use Swiss Banking Relationships as a Resilience Layer

For families using Zurich or Geneva private banks alongside U.S. institutions, third-party risk creates another argument for deliberate functional diversification.

Different institutions can be assigned different responsibilities for custody, liquidity, payments, financing and investment management. The objective is not to multiply banking relationships unnecessarily. It is to prevent one technology stack, legal entity or service provider from becoming indispensable to the family’s entire financial architecture.

Make Third-Party Exposure Part of Private-Bank Due Diligence

When reviewing a major banking relationship, families should increasingly ask four questions: which critical functions are outsourced, which providers support those functions, what contingency arrangements exist, and how quickly the bank could migrate the service if the provider failed.

That level of questioning is particularly appropriate for HNW structures where a temporary disruption can have consequences far beyond inconvenience—affecting corporate transactions, tax payments, property obligations, investment settlements or access to liquidity.

The broader lesson is clear. Modern private banking is no longer defined solely by the strength of the balance sheet or the reputation of the relationship manager. It is also defined by the resilience of the invisible infrastructure underneath the relationship.

For a confidential discussion regarding your cross-border banking structure and institutional risk exposure, contact our senior advisory team.