What is crypto custody for institutions?

Crypto custody for institutions is the business of holding and protecting digital assets on behalf of large clients such as investment funds, asset managers, Bitcoin ETFs and companies. The custodian controls the private keys, keeps records and runs strict security procedures. This guide covers the institutional side; for how individuals choose between holding their own keys or not, see custodial vs non-custodial wallets.

What is a qualified custodian for crypto?

In the US, registered investment advisers who hold client assets generally must keep them with a "qualified custodian." The existing rules limit that title to categories such as banks, broker-dealers and futures commission merchants. According to the SEC, this has left few firms able to hold many crypto assets.

Several changes have followed. On September 30, 2025, SEC staff issued a no-action letter saying advisers and funds could use state-chartered trust companies as crypto custodians, subject to conditions. In 2026 the SEC proposed new custody rules covering crypto. As of October 2026 these are proposals, and they would, among other things, let state trust companies authorized by their regulators serve as custodians, require client crypto to be kept separate from the custodian's own assets, and allow advisers to self-custody in limited cases when no custodian is available.

Can banks offer crypto custody services?

Yes. In March 2025 the Office of the Comptroller of the Currency issued Interpretive Letter 1183, confirming that national banks may provide crypto custody. It dropped an earlier requirement to get supervisory non-objection first, while saying banks must still operate safely and follow the law. Our guide on banks and crypto covers this in more depth.

Accounting rules also shifted. In January 2025 the SEC issued Staff Accounting Bulletin 122, which withdrew earlier staff guidance on how firms that safeguard crypto for users should account for that obligation. Companies now apply standard rules on contingent losses instead.

How does custody insurance work?

Custodians may carry crime insurance, but it is not the same as deposit insurance. Filings for one Bitcoin ETF in 2023 show how coverage can work in practice. Its custodian's crime policy had a $320 million limit that was shared across all of that custodian's customers, came with a large deductible, and excluded events like protocol failures and losses caused by a client's own weak credentials.

That means a single large loss could exceed coverage. When reviewing a custodian, institutions typically ask about the policy limit, whether it is shared and what is excluded. More on this in is crypto insured.

How do custodians keep crypto safe?

Most institutional custodians keep the bulk of assets in cold storage, where private keys stay offline. Access usually requires several authorized people, so no single employee can move funds alone. Clients often review audited financial statements and internal control reports before choosing a provider.

Rules differ by country and change often. Check the relevant regulator or a qualified professional for your own situation.