Qualified Custodian

A qualified custodian is a type of financial institution that United States securities rules recognize as fit to hold assets belonging to the clients of an investment adviser. The term comes from the custody rule made by the Securities and Exchange Commission under the Investment Advisers Act of 1940. An adviser that has custody of client funds or securities must, with limited exceptions, keep them with such an institution rather than holding them itself.

The purpose is to separate the party that manages money from the party that keeps it, so that an adviser cannot easily misuse or lose client assets. The concept has become prominent in digital asset markets, where funds, advisers and stablecoin issuers need a regulated custodian for crypto assets and where the question of which firms qualify has been debated for several years.

The custody rule, Rule 206(4)-2, lists four categories.

• Banks and savings associations. This covers banks as defined in the Advisers Act, which includes national banks, state banks and certain trust companies that are supervised by state or federal banking authorities, and insured savings associations.
• Registered broker-dealers. A broker-dealer registered with the SEC may hold client assets in customer accounts.
• Futures commission merchants. A firm registered with the Commodity Futures Trading Commission qualifies for client funds and security futures, and for other securities incidental to futures transactions.
• Foreign financial institutions. An institution outside the United States qualifies if it customarily holds financial assets for customers and keeps advisory clients' assets separate from its own.

Status depends on the type of charter or registration, not on a separate license called qualified custodian. No regulator issues a certificate with that name.

An adviser has custody when it holds client assets directly or has authority to obtain them, for example by being able to withdraw money from a client account. In that case the assets must be kept with a qualified custodian in an account under the client's name or in an account that holds only client assets under the adviser's name as agent or trustee. This is a form of segregation of funds.

The adviser must have a reasonable belief that the custodian sends account statements to each client at least quarterly. In most cases the adviser must also arrange a surprise examination by an independent public accountant once a year to verify that the assets exist. Advisers to pooled investment vehicles can meet part of these duties by distributing audited financial statements to investors.

Holding crypto assets means controlling the private key that authorizes transfers, which is different from holding securities through a depository. When advisers and funds began to invest in crypto, few traditional custodians offered the service, and specialist firms emerged. Most of them obtained a state trust company charter, commonly in South Dakota, Nevada, Wyoming or New York, and took the position that a supervised trust company falls within the bank category of the rule. Wyoming also created the special purpose depository institution, and New York's Department of Financial Services charters limited purpose trust companies for virtual currency business.

At federal level the Office of the Comptroller of the Currency has stated that national banks may provide crypto custody, and it has granted national trust bank charters to several digital asset firms. Custodians in this market typically keep most keys in cold storage, use multi-signature or multi-party computation custody for transfers, and obtain independent control reports.

The SEC has revisited the subject several times. In 2022 its staff issued Staff Accounting Bulletin 121, which told public companies that safeguard crypto assets for customers to record a liability and matching asset on their balance sheets. Banks argued that this made custody impractical for them. The bulletin was rescinded in January 2025 by Staff Accounting Bulletin 122.

In February 2023 the SEC proposed replacing the custody rule with a broader safeguarding rule that would have covered all client assets, including crypto assets, and set conditions for custody agreements. The proposal drew heavy criticism and was withdrawn in June 2025. In September 2025 SEC staff said advisers could treat state trust companies as banks for crypto custody, subject to conditions, and in October 2026 the Commission proposed a new custody rule that would write that position into its rules and allow limited self-custody of crypto assets. Until a final rule is adopted, advisers continue to rely on the existing rule and staff statements. Firms should check the current position before relying on any particular custodian's status.

For an adviser, using an institution that does not qualify is a breach of the custody rule and can lead to enforcement. For investors, the status signals that the custodian is examined by a banking or securities regulator, owes duties as a fiduciary or under customer protection rules, and keeps client property apart from its own.

The label has limits. It does not guarantee that assets are safe from theft, insolvency or operational failure, and it says nothing about insurance cover. Institutional investors therefore examine a custodian's capital, key management, use of sub-custody, audit reports and treatment of client assets in bankruptcy, in addition to its charter.

• U.S. Securities and Exchange Commission
• Office of the Comptroller of the Currency