Opening a private banking relationship in 2026 requires significantly more preparation than it did even five years ago. The era of walking into a bank with a referral letter and leaving with an account number is long gone. Today, private banks operate under an increasingly stringent compliance framework, and understanding what they need — and why — is the first step toward a successful introduction.

The Modern Due Diligence Process

Know Your Customer (KYC) and Anti-Money Laundering (AML) requirements now demand a comprehensive understanding of a client's source of wealth, source of funds, and the provenance of specific assets being deposited. Banks will typically require documentation such as audited financial statements, corporate structure charts, trust deeds or foundation statutes, tax returns, and in some cases, third-party wealth verification letters from attorneys or accountants.

“A well-prepared client dossier is the single most important factor in achieving a smooth and timely private banking introduction.”

Choosing the Right Jurisdiction and Bank

Not all private banks are created equal, and the right choice depends heavily on the client's profile, asset base, and long-term objectives. Swiss private banks remain the benchmark for discretion and investment expertise, particularly for clients with complex, multi-asset portfolios. Singapore-based institutions are increasingly preferred for Asia-Pacific clients, offering strong digital infrastructure alongside traditional private banking capabilities. For USD-centric clients, US and Cayman-based private banks offer specific advantages around investment product access. For international clients Nevis, Hong Kong and Mauritius offer ideal banking options.

Our banking advisory team at Glenmuir International maintains longstanding relationships with private banks across key jurisdictions. We work with clients upstream — preparing the necessary documentation, structuring the account-holding entity, and making the introduction at the right level within the institution to maximise the chances of a successful and timely account opening.