The Office of the Comptroller of the Currency (OCC) issued version 3.0 of the "Concentrations of Credit" booklet of the Comptroller's Handbook on September 30, 2026.
The revised booklet replaces version 2.0 of the booklet of the same title. It also rescinds OCC Bulletin 2020-90, "Concentrations of Credit: Revised Comptroller's Handbook Booklet and Rescissions," which transmitted version 2.0.
The booklet continues to define a concentration of credit as the sum of direct, indirect, or contingent obligations exceeding 25 percent of a bank's tier 1 capital plus the allowance for credit losses. It was reorganized to keep similar information together.
According to the OCC, the revised booklet includes a more comprehensive discussion of risks associated with concentrations of credit, with content on quantity of risk moved into that section. It also adds clarity on ranges of practices for banks of different sizes, complexities, and risk profiles, and clarifies the relationship between correlations and concentrations.
The booklet includes new information about securitizations and their relationship to concentration levels and the quantity of concentration risk, and adds clarity regarding risk management practices relative to determining aggregate risk.
The OCC said the booklet informs and educates examiners about concentrations of credit in banks of all sizes, with emphasis on ranges of practices for varying sizes, complexities, and risk profiles. Examiners determine which expanded procedures to use, if any, based on risk.
The Comptroller's Handbook is designed to guide examiners in performing consistent, high-quality bank supervision across OCC-supervised banks, and is made available to the public to provide transparency into the OCC's supervisory process.