Office of the Comptroller of the Currency (OCC).

In plain English

The OCC is a bureau of the Treasury Department, and it decides who gets a national bank charter, examines those banks for safety and soundness and compliance, and can order corrective action or remove bank officers. Its examiners sit on site at the largest institutions and review lending, capital, liquidity, and controls. It is funded by assessments on the banks it supervises rather than by congressional appropriations. It shares the field with other regulators, since the Federal Reserve supervises holding companies and state member banks, and the FDIC supervises many state-chartered banks. A bank's charter type determines which of them is its primary supervisor.

01Why it matters

Whether a bank is national or state chartered decides which agency you can escalate to and which rules apply to your account, which is worth knowing before a dispute starts.

02The math, step by step

Say two banks operate on the same street. One holds a national charter, so OCC examiners are its primary supervisor and federal rules govern many of its terms. The other holds a state charter, so a state regulator and a federal partner share that role.

Illustrative example. The amounts here are hypothetical, chosen to show how the math works, not real quoted rates or figures.

03What this is NOT

04Receipts

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