The Office of the Comptroller of the Currency, or OCC, is the federal agency that charters, regulates, and supervises national banks, federal savings associations, and the U.S. branches of foreign banks. It’s an independent bureau of the Treasury Department, and the banks it oversees hold roughly $16.7 trillion in assets.1Office of the Comptroller of the Currency. Key Data and Statistics In practical terms, the OCC decides who gets to open a national bank, examines those banks for safety and fair treatment of customers, punishes them when they break the rules, and takes complaints from their customers. The Treasury Secretary cannot delay its rules or intervene in its enforcement actions.2Office of the Law Revision Counsel. 12 USC 1
Which Banks the OCC Regulates
The OCC’s authority runs to three groups: national banks, federal savings associations (the institutions once called federal thrifts), and federal branches and agencies of foreign banks operating in the United States.3eCFR. 12 CFR Part 4, Subpart A – Organization and Functions As of September 2024, that came to about 751 national banks, 240 federal savings associations, and 49 federal branches and agencies.4U.S. Department of the Treasury. OCC FY 2026 Budget-in-Brief
There’s a shortcut for spotting a national bank. Federal law requires them to carry the word “National” or the initials “N.A.” (National Association) in their formal name.5OCC. A Guide to Tribal Ownership of a National Bank Bank of America, N.A., Citibank, N.A., and Capital One, N.A. are all OCC-supervised.6OCC. Large and Global Financial Institution List If the name on your account doesn’t make it obvious, the OCC’s Financial Institution Search tool will confirm whether your bank falls under its supervision.7OCC. Financial Institution Search
Not every bank the OCC supervises gets the same treatment. Institutions above $500 billion in assets, and those with foreign parents, sit inside the agency’s Large and Global Financial Institutions group with examiners on-site year-round. Smaller banks and savings associations are supervised through district offices.8OCC. OCC Announces Updates to Organizational Structure
How the OCC Differs From the Fed and the FDIC
The United States has no single bank regulator. Which agency supervises a bank turns mostly on how the bank is chartered. The OCC handles federally chartered banks. The Federal Reserve oversees state-chartered banks that belong to the Federal Reserve System, plus bank holding companies. The FDIC supervises state-chartered banks that aren’t Fed members.
The FDIC also does something the OCC doesn’t: it insures deposits up to $250,000 per depositor, per bank, at essentially every bank regardless of charter. So a national bank is supervised by the OCC while its deposits are insured by the FDIC. The distinction matters when you need to file a complaint or figure out which agency’s rules apply to your account.
Chartering New Banks
Granting federal bank charters is one of the OCC’s oldest functions. Under 12 U.S.C. § 21, a group of at least five people can form a national banking association by filing articles of association with the Comptroller.9Office of the Law Revision Counsel. 12 USC 21 – Formation of National Banking Associations After review, the Comptroller issues a certificate authorizing operations, but only if every legal requirement is met, and can withhold it where there’s reason to believe the bank was formed for illegitimate purposes.10Office of the Law Revision Counsel. 12 USC 27 – Certificate of Authority to Commence Banking
Approval is not easy. A new bank (“de novo”) must hold a tier 1 leverage ratio of at least 8 percent throughout its first three years or until it reaches stable profitability, whichever is longer. It has to submit a three-year business plan with realistic market and risk analysis, and its proposed officers and directors have to bring genuine banking experience.11OCC. Comptrollers Licensing Manual – Charters
The OCC has also opened a path for fintech companies through special purpose national bank charters. A fintech applicant still has to perform at least one core banking function — paying checks or lending money — and meets the same safety, soundness, and consumer protection standards as any other national bank. Because these institutions aren’t FDIC-insured, they aren’t subject to the laws that apply only to insured banks, but the OCC layers on tailored conditions of its own.12OCC. Exploring Special Purpose National Bank Charters for Fintech Companies
Ongoing Supervision and Examinations
Once a bank is open, the OCC watches it. Continuously. Bank examiners review loan portfolios, internal audit reports, capital levels, and risk management practices, both on-site and through off-site data analysis.
The core scoring framework is CAMELS, which rates each bank across capital adequacy, asset quality, management, earnings, liquidity, and sensitivity to market risk. Each component gets its own rating, and the bank receives a composite score. A weak CAMELS score can bring on tighter reporting requirements, closer scrutiny, or formal enforcement.13FDIC. Section 1.1 Basic Examination Concepts and Guidelines
Cybersecurity gets its own examination track. Examiners apply a dedicated Cybersecurity Supervision Work Program aligned with the NIST Cybersecurity Framework, evaluating each bank on how it identifies, protects against, detects, responds to, and recovers from cyber threats.14OCC. Cybersecurity Supervision Work Program
Enforcement Powers
When a bank breaks the law or operates unsafely, the OCC has a ladder of enforcement tools. At the lower end are formal agreements signed with the bank’s board, laying out corrective steps. Cease and desist orders under 12 U.S.C. § 1818(b) go further, legally requiring a bank or an individual to stop a practice and fix the problem.15OCC. Enforcement Action Types In serious cases, the OCC can permanently bar individual officers or directors from working in any federally insured bank.16Office of the Law Revision Counsel. 12 USC 1818 – Termination of Status as Insured Depository Institution
If a bank’s capital falls too low, the OCC can issue a prompt corrective action directive, restricting dividends, asset growth, or executive pay, and ultimately forcing the bank to raise capital or wind down. As a final step, the FDIC can terminate the bank’s deposit insurance based on OCC evidence, which effectively shuts the bank down as a depository institution.15OCC. Enforcement Action Types
Money penalties come in three tiers, from ordinary violations up to knowing misconduct that causes substantial losses, with the maximum Tier 3 penalty reaching $2,513,215 per day at the 2025 inflation adjustment.17Federal Register. Notification of Inflation Adjustments for Civil Money Penalties Because the caps apply per day, even a lower-tier violation can add up quickly when it drags on.
Consumer Protection and How to File a Complaint
The OCC’s job isn’t only financial stability. The agency is also charged with making sure banks give customers fair access to credit and fair treatment overall.2Office of the Law Revision Counsel. 12 USC 1
Under the Community Reinvestment Act, examiners evaluate whether national banks are serving the credit needs of their whole communities, including low- and moderate-income neighborhoods, without discriminatory lending. CRA ratings are public, and a weak one can block a bank from opening new branches or completing a merger.18Federal Reserve Board. Community Reinvestment Act (CRA)
Servicemembers get their own layer of protection. Under the Servicemembers Civil Relief Act, examiners check that banks are capping interest at 6 percent per year on pre-service obligations and are not foreclosing on servicemember property without a court order. For mortgages, those protections carry through for a year after military service ends.19OCC. Comptrollers Handbook – Servicemembers Civil Relief Act
If a national bank has mishandled your account, denied you a loan improperly, or given you a runaround you can’t resolve directly, you can file a complaint through the OCC’s HelpWithMyBank.gov portal.20OCC. Consumer Complaints Confirm first that your bank is actually OCC-regulated using the Financial Institution Search. If it’s a state-chartered bank, your complaint belongs with the FDIC or your state banking department instead.
Preemption of State Law
One of the OCC’s most consequential powers is federal preemption. Because national banks operate under a federal charter, some state laws don’t reach them. The Supreme Court has held that state law is preempted where it prevents or significantly interferes with a national bank exercising its federal powers.21Federal Register. Preemption Determination – State Interest-on-Escrow Laws
Interest rates are the most familiar example. Federal regulations let a national bank charge interest at the highest rate allowed by the state where it’s located and apply that rate to borrowers in other states, even where local caps would be lower.22eCFR. 12 CFR 7.4001 – Charging Interest by National Banks This “rate exportation” is one reason large lenders prefer a national bank charter. In 2024, the Supreme Court’s decision in Cantero v. Bank of America clarified that courts have to look practically at how much a particular state law actually interferes with federal banking powers before deciding it’s preempted.21Federal Register. Preemption Determination – State Interest-on-Escrow Laws
Digital Assets and Fintech
The OCC has spent recent years spelling out how national banks can work with digital assets. Through a run of interpretive letters, it has confirmed that national banks may hold crypto-assets in custody for customers, hold dollar deposits backing stablecoins, and hold small amounts of crypto to pay blockchain network fees, all as activities incidental to banking.23OCC. Interpretive Letter 1186
Congress backed part of this up in 2025 with the GENIUS Act, which explicitly authorized certain stablecoin-related activities for national banks.23OCC. Interpretive Letter 1186 Any bank pursuing crypto activity still has to satisfy the OCC on cybersecurity, operational controls, liquidity, and anti-money-laundering, the same safety and soundness bar that governs every other line of banking business.