What it means
A bank can be financially sound overall yet take excessive risk on one borrower, and a lending limit addresses that concentration by restricting covered exposure. It is different from a credit decision about whether a particular borrower can repay.
The OCC describes lending limits as protecting safety and soundness, encouraging diversification, and supporting equitable access to banking services, and points to 12 CFR Part 32, which defines the relevant scope, capital base, credit exposure, and exceptions. Under the cited general rule, a covered institution's outstanding loans and extensions of credit to one borrower generally cannot exceed 15% of capital and surplus.
An additional 10% can be available for the excess portion when it is fully secured by qualifying readily marketable collateral under the rule's conditions. A short headline percentage cannot replace the regulation's definitions.
The additional amount is not a blanket allowance for every secured loan, because the regulation requires a perfected security interest and current collateral value meeting the specified coverage. Property that appears valuable does not automatically meet the readily marketable collateral definition.
The capital base is also defined, and it is not simply customer deposits, total assets, or whatever shareholders call equity in a presentation; applying the percentage to the wrong base can produce a materially incorrect limit even when the arithmetic is flawless. Borrower relationships can require combining exposures, since related names do not always identify independent credit risks and the regulation contains tests addressing direct benefit and common enterprise.
Compliance staff need the ownership and economic relationships, not only a list of separate company registrations. Covered exposure can include more than an ordinary funded loan, so a facility's label or its unused balance should not be treated as evidence that it falls outside the calculation.
Exceptions require their specified conditions, and internal policies may be tighter than the legal ceiling. Headroom also moves over time, as repayments, new draws and changes in the bank's capital all change what remains available.
For non-finance managers seeking finance, distinguish the bank's regulatory capacity from the project's commercial merit. A lender can decline or share a transaction because of its exposure limit even when it considers the business viable.
Ask which constraint applies rather than assuming every refusal is a negative credit judgment.
In practice
Real-world examples.
Example
A fictional business requests a new facility from a small bank. The bank supports the project but explains that its existing exposure leaves limited headroom. The borrower considers other funding sources rather than treating the refusal as proof the project is unsound.
Example
A borrower offers a building as collateral and assumes this permits the additional secured amount. The lender checks the regulatory collateral definition instead of equating every secured loan with the readily marketable collateral allowance.
Example
Two related companies apply separately to the same bank. Compliance examines whether their exposures must be combined, rather than assuming different company names create two independent full limits.
Formula
Calculation
For an illustration of the cited general rule, assume a covered bank has $100 million of properly defined capital and surplus. The 15% general amount is $15 million, and the possible additional 10% is $10 million, subject to the qualifying collateral conditions.
If $12 million of relevant outstanding exposure is already attributed to the borrower, general headroom is $3 million under these assumptions. The possible secured allowance needs separate review.
Exceptions, combination rules, institution scope, and internal limits can change what is actually available. This is not approval for a real loan.Case study
Seen in the real world.
In this fictional case, Quarry Engineering expects its relationship bank to provide the entire funding for a new plant. The director bases that expectation on the bank's total assets and the strength of their longstanding relationship. The lender explains that its lending-limit calculation uses a defined capital base and includes existing attributed exposures. It also distinguishes ordinary collateral from the collateral conditions supporting an additional amount under the rule.
Quarry revises the financing plan and asks advisers to compare lawful alternatives and timing. The case shows why regulatory capacity, credit quality, and project affordability are separate questions. A theoretical ceiling does not guarantee a commitment.
Watch out
Common mistakes.
- Applying a percentage to total deposits or assets instead of the defined regulatory capital base.
- Assuming every secured loan qualifies for an additional allowance regardless of collateral and perfection conditions.
- Treating related borrowers as independent without checking the applicable exposure-combination rules.
Questions
People also ask.
Does a loan below the limit have to be approved?
No. Credit quality, affordability, documentation, and the bank's internal policies remain separate requirements.
Does every bank worldwide use the same percentages?
No. Jurisdiction and institution scope matter. This example describes the cited US framework rather than a universal rule.
Can separate company names avoid combination?
Not necessarily. The applicable rules can combine exposures based on economic relationships and other defined tests. Review the actual structure.
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