Block files for federal BTC custody charter

TLDR

Block, Inc. has applied for a federal national trust bank charter to offer regulated Bitcoin and stablecoin custody through a new unit called Builders Bank & Trust.

1. Block wants Builders Bank to be an uninsured, non?deposit?taking national trust bank that provides custody and fiduciary services for Bitcoin and stablecoins under Office of the Comptroller of the Currency (OCC) supervision.
2. The move deepens institutional Bitcoin custody options and fits a broader trend of fintech and crypto firms seeking federal charters, potentially letting Block plug regulated custody into products like Cash App and Bitkey.
3. The charter is not yet approved, so the key signals to watch are OCC conditions or delays and how this fits with upcoming US crypto market?structure and custody rules.

Deep Dive

1. Builders Bank Charter Details

Block has submitted an application to the OCC to establish Builders Bank & Trust, N.A., an uninsured national trust bank that would focus on custody and related fiduciary services, including for Bitcoin and stablecoins, rather than traditional lending or deposit?taking activities. The company describes Builders Bank as a way to place certain existing custody services inside a consistent federal supervisory framework, with Lee Woolley, Blocks digital asset strategy lead, slated as president and CEO if the charter is approved, according to the Builders Bank application.

Because it would be a national trust bank, Builders Bank would be overseen directly by the OCC, giving Block a single federal regulator for these activities instead of relying only on state?level trust charters or non?bank licensing regimes. The bank would not accept deposits or make loans, so customers should treat it as a regulated custody vehicle, not as a conventional insured bank account.

2. Why Bitcoin Custody Matters

Federal oversight for a dedicated Bitcoin and stablecoin custodian is part of a broader migration of crypto custody into the banking perimeter, alongside OCC charters sought or granted to firms such as Circle, Ripple, Paxos, BitGo and others, as noted in coverage of Blocks rush for federal bank charters. For institutions, a national trust bank can simplify risk and compliance assessments, since capital, governance and operational standards are set by a familiar banking regulator.

For Block, a charter could eventually let it anchor custody for brands like Square, Cash App, Bitkey and its mining products inside a single federally supervised entity, which may make it easier to scale services such as Bitcoin savings, multi?user custody and institutional accounts. For users, this does not replace self?custody, but it expands the set of regulated options for those who prefer professionally managed, audited storage.

3. Regulatory Path And Risks

The application still must clear OCC review, which has become a key bottleneck for crypto?adjacent banking charters even as the agency has approved 21 new charters and denied 2 since 2025, according to the same OCC charter coverage. Parallel debates over federal crypto market?structure legislation, such as the Crypto Clarity Act and proposed SEC rules for digital asset custody, could shape how regulators view risk, asset segregation and consumer protection, but they do not automatically determine OCC outcomes.

Uncertainties include potential capital and risk?management requirements, how Builders Bank will handle multi?asset custody beyond Bitcoin, and whether political or policy shifts slow approvals. If the OCC imposes heavy conditions or delays, Block may need to adjust timelines or structure, while denial would signal a tougher stance on crypto custody inside national banks.

Confidence: moderate, because the filing is confirmed but the regulatory outcome and timeline remain open.

Conclusion

Blocks push for a federal Bitcoin custody charter through Builders Bank & Trust marks another step in pulling crypto infrastructure into the regulated banking system, especially for institutional clients. The practical impact will depend on OCC approval conditions and how future US crypto custody and market?structure rules evolve, but if Builders Bank is green?lit, it could broaden regulated Bitcoin storage options and make it easier for mainstream users and institutions to access crypto through familiar, bank?style channels.