Legal Lending Limit: Thresholds, Borrower Rules, and Exceptions

A national bank’s legal lending limit caps how much it can lend to any one borrower at 15 percent of the bank’s unimpaired capital and surplus, with an additional 10 percent allowed when the extra amount is fully secured by readily marketable collateral such as publicly traded stocks or bonds.¹ The rule sits in federal statute at 12 USC 84 and is spelled out in detail by the Office of the Comptroller of the Currency (OCC) in 12 CFR Part 32, which also covers federally chartered savings associations.² Its purpose is to keep any single borrower’s failure from threatening the bank or its depositors.

The 15 Percent Baseline

The general rule is that total outstanding loans and extensions of credit to one borrower cannot exceed 15 percent of the bank’s unimpaired capital and unimpaired surplus.¹ For a bank with $100 million in capital and surplus, that works out to a $15 million ceiling per borrower on credit that is not fully secured by qualifying collateral.

The cap covers total exposure, not any single loan in isolation. If a borrower already has a $10 million term loan, the bank has only $5 million of headroom left before it hits the ceiling. Every new advance stacks on top of whatever the borrower already owes, whether the new credit takes the form of a fresh loan, a line of credit, or a letter of credit.

The Extra 10 Percent for Secured Loans

When a borrower needs more than the 15 percent baseline allows, the bank can extend an additional 10 percent of its capital and surplus, bringing the combined ceiling to 25 percent, but only if the extra amount is fully backed by qualifying collateral.²

Qualifying collateral is narrow. It has to be financial instruments or bullion that trade on established markets with daily bid-and-ask pricing. Publicly traded stocks on a major exchange qualify. Real estate does not, because it cannot be sold quickly at a predictable price. The collateral’s market value must equal at least 100 percent of the portion of the loan that exceeds the 15 percent general limit, and the bank has to monitor that value continuously.²

If the collateral’s value falls below that threshold, the bank has 30 calendar days to bring the loan back into compliance, either by obtaining additional collateral or reducing the balance.³ The one exception is when extraordinary circumstances such as regulatory actions or court proceedings physically prevent the bank from acting in time.

What “Capital and Surplus” Means

Because the limit is a percentage, the definition of capital and surplus does the real work. The figure varies with the bank’s size and regulatory framework. For qualifying community banking organizations it generally means tier 1 capital plus the allowance for loan and lease losses. Larger banks outside the community banking framework use a different calculation tied to their regulatory capital rules.²

The number is not static. A bank recalculates its lending limit as of the last day of each calendar quarter, with the new figure taking effect when it files its quarterly Call Report.² A recalculation is also triggered when the bank’s capital category changes for prompt corrective action purposes, and the OCC can order more frequent recalculation if it has safety and soundness concerns. For borrowers, the practical consequence is that a bank’s capacity to lend to you can shrink between quarters if the bank takes unexpected losses.

The 50 Percent Corporate Group Cap

Even when individual entities within a corporate family each stay under their own borrower limit, a separate ceiling caps the bank’s total exposure to the whole group at 50 percent of capital and surplus.² A corporate group means a person or company together with all entities in which it owns more than 50 percent of the voting interest, directly or indirectly. A parent with three wholly owned subsidiaries could theoretically use the full 25 percent for each entity individually, but the bank’s combined exposure to the family cannot cross the 50 percent line.

Who Counts as One Borrower

The lending limit would be easy to sidestep if a borrower could split a loan across multiple legal entities. The regulation aggregates loans to different borrowers whenever the entities are financially intertwined, using three tests.

Direct Benefit

If the proceeds of a loan to one entity end up being used by another, the loans are combined.² A subsidiary borrows $5 million, the parent actually spends it, and the $5 million counts against both borrowers’ limits. Regulators track where the money goes, not whose name is on the note.

Common Enterprise

Borrowers are also aggregated when they share the same source of repayment and neither has independent income sufficient to cover its debt.² Two partnerships under common ownership that both depend on revenue from the same project are, in economic terms, one exposure.

Financial Interdependence

Two borrowers are presumed to operate as a common enterprise when 50 percent or more of one borrower’s annual gross receipts or expenditures come from transactions with the other.⁴ The calculation sweeps in revenue, intercompany loans, dividends, and capital contributions.

What Counts as an Extension of Credit

The limit reaches beyond traditional term loans. Any direct or indirect advance of funds based on a borrower’s obligation to repay qualifies as an extension of credit.² That includes:

Contractual commitments such as undrawn lines of credit, because the bank is legally obligated to advance the funds on demand.
Standby letters of credit that require the bank to pay a third party if the borrower defaults.
Lease financing, where the bank buys equipment and leases it to a customer.
Certain derivative and securities financing transactions that create credit risk.

The definition is deliberately broad so that repackaging a loan into a different product does not shrink its footprint under the cap.

Exceptions to the Limit

Some credit is considered low enough risk that it sits outside the standard caps, letting a borrower access it without eating into the 15 or 25 percent allocation.

Government-Backed Credit

Loans fully secured by U.S. Treasury obligations, or by instruments backed by the full faith and credit of the federal government, are exempt. Loans to federal departments and agencies, and loans guaranteed by them, are also excluded. General obligations of a state or political subdivision can qualify as well, provided the bank obtains a legal opinion confirming the obligation is valid and enforceable.⁵

Deposit-Secured Loans

Loans secured by deposits held at the lending bank itself are generally exempt, because the bank already controls the cash backing the loan.

Commercial Paper and Bankers’ Acceptances

Loans arising from the discount of negotiable commercial or business paper are exempt when the paper was given in payment for goods purchased for resale or another business purpose reasonably expected to generate funds for repayment, and it carries the full recourse endorsement of its owner.⁵ Bankers’ acceptances eligible for rediscount under federal law are similarly excluded.

Livestock-Secured Loans

Loans secured by livestock get a separate exception of up to 10 percent of capital and surplus on top of the combined general limit. The collateral has to be worth at least 115 percent of the amount exceeding the general limit, and the bank must keep an inspection and valuation on file no more than 12 months old.²

When a Compliant Loan Drifts Over the Limit

A loan that was within the limit when made can slip over it later without anyone doing anything wrong. The bank’s capital might decline, two borrowers might merge, two banks might merge, or the OCC might change the capital rules. Those situations are treated as nonconforming rather than as violations. The bank must use reasonable efforts to bring the loan back within its limit, but it is not penalized for the initial overage so long as the loan was compliant at origination.³

There is a safety valve: the bank does not have to force compliance if doing so would be inconsistent with safe and sound banking practices, such as calling a performing loan in a way that would destabilize the borrower and guarantee a loss. Collateral-driven nonconformance is tighter. When the loan exceeds the limit because the collateral backing the supplemental 10 percent has dropped in value, the bank has exactly 30 calendar days to fix it.³

Penalties for Violations

The statute authorizes tiered daily civil money penalties: a base of $5,000 per day for routine violations, $25,000 per day for violations involving recklessness or a pattern of conduct, and up to $1,000,000 per day for knowing violations that cause substantial losses or produce significant gain to the violator.⁶ Those figures are adjusted annually for inflation. As of January 2025, the inflation-adjusted maximums are $12,567, $62,829, and $2,513,215 per day, respectively.⁷

Directors who knowingly violate or knowingly permit violations of the National Bank Act can be held personally liable for damages the bank, its shareholders, or any other person sustains as a consequence.⁸ In extreme cases the bank’s charter can be forfeited, though that requires a court proceeding brought by the Comptroller. The OCC can also issue cease-and-desist orders and, in cases of willful or continued violations, permanently bar individuals from working in the banking industry.⁹

Bank insiders face a separate regime. Executive officers, directors, and major shareholders are prohibited from knowingly receiving credit that violates the applicable restrictions and face additional civil penalties under Federal Reserve Regulation O.¹⁰

What This Means for Borrowers

Borrowers sometimes assume that a lending limit violation voids the loan or gives them a defense against repayment. It does not. Courts have consistently held that even when a bank exceeds its legal lending limit, the borrower still owes the full unpaid balance.¹¹ The violation is the bank’s regulatory problem.

Where the limit does affect borrowers directly is when a bank’s capital declines and existing loans become nonconforming. The bank may need to trim outstanding credit, decline to renew a line of credit, or ask for additional collateral. For large commercial borrowers whose financing needs approach or exceed a single bank’s capacity, the lending limit is often the practical reason they work with a syndicate of multiple banks rather than relying on one.

1
Office of the Law Revision Counsel. 12 USC 84 – Lending Limits
2
eCFR. 12 CFR Part 32 – Lending Limits
3
eCFR. 12 CFR 32.6 – Nonconforming Loans and Extensions of Credit
4
eCFR. 12 CFR 32.5 – Combination Rules
5
eCFR. 12 CFR 32.3 – Lending Limits
6
Office of the Law Revision Counsel. 12 USC 93 – Violation of Provisions of Chapter
7
Federal Register. Notification of Inflation Adjustments for Civil Money Penalties
8
Office of the Law Revision Counsel. 12 USC 93 – Violation of Provisions of Chapter
9
Office of the Comptroller of the Currency. Enforcement Action Types
10
eCFR. 12 CFR Part 215 – Loans to Executive Officers, Directors, and Principal Shareholders of Member Banks
11
Federal Deposit Insurance Corporation. Examination Policies Manual Section 4.5 – Violations of Laws and Regulations