What it means
Lenders and insurers set limits so that no single customer or risk can cause serious damage if it fails. A bank might approve a $5,000,000 credit line for one borrower, and an insurer might cap the amount it keeps on one building at a set figure.
These limits are part of a wider risk policy approved by management. An overline arises when the exposure goes past the cap.
It may be deliberate, for example when a long-standing client needs extra funding for a short time, or accidental, when balances grow through interest, fees or drawdowns that nobody noticed. Either way it is normally reported as an exception and needs senior approval.
The danger is concentration. If a lender has an overline to one borrower and that borrower fails, losses can be much bigger than the lender planned for.
Regulators also set rules on large exposures, so a serious overline can lead to breaches that must be reported. In insurance, an overline is often managed by sharing the risk.
The insurer might pass part of it to a reinsurer (a company that insures insurers), or invite other insurers to share the cover. This keeps the customer happy while bringing the insurer's own exposure back to a safe level.
Good practice is to monitor exposures daily, set alerts below the limit, and require written approval for any temporary excess. Each approved overline should have an end date and a plan to bring the exposure back under the limit.
The word is used loosely in some firms to mean any exposure above a soft guideline. It is worth checking whether your policy treats it as a hard limit breach or an internal trigger for review.
In practice
Real-world examples.
Example
A regional bank has a limit of $20,000,000 for any single borrower. A property developer's loans, with interest added, reach $21,500,000. The credit committee records an overline of $1,500,000 and sets a three-month deadline to reduce it.
Example
An insurer's usual maximum retention on a warehouse is $10,000,000. A client asks for $15,000,000 of cover, so the insurer accepts it and passes $5,000,000 to a reinsurer. The overline is shared and the insurer's retained risk stays within its limit.
Example
A trade finance team approves $2,000,000 of letters of credit for an importer. A rush of shipments pushes issued credits to $2,300,000 before the limit is updated. The compliance team flags the excess and requests approval.
Formula
Calculation
Overline amount = total exposure - approved limit
Overline percentage = overline amount / approved limit
A bank approves a credit line of $5,000,000 for a manufacturer. Because of a large seasonal drawdown plus accrued interest, the exposure reaches $5,600,000. Overline amount = 5,600,000 - 5,000,000 = $600,000. Overline percentage = 600,000 / 5,000,000 = 0.12, or 12%.
Reading the result: the bank is 12% above its own limit, and it must either obtain a formal exception, reduce the balance or sell part of the exposure to another lender. If the borrower defaulted with a 40% loss, the bank would lose 5,600,000 x 0.40 = $2,240,000, which is $240,000 more than the loss at the approved limit.
The overline can also be shown against the lender's capital. If the bank's single-borrower limit is set at 10% of its $50,000,000 of capital, the limit is $5,000,000, and the $600,000 overline takes the exposure to 11.2% of capital (5,600,000 / 50,000,000).Case study
Seen in the real world.
Harlow Mutual Bank is an illustrative, fictional lender with a single-borrower limit of $15,000,000. A long-standing client, a food distributor, asked for extra funding to buy stock before a peak season.
The relationship manager approved a temporary overline of $2,000,000 without formal committee sign-off. The distributor later lost a major supermarket contract and fell behind on repayments, and the bank discovered its exposure was larger than the board had been told.
The risk committee introduced a rule that every overline needs written approval and an expiry date. The illustrative lesson is that a temporary excess is still a real exposure and should be tracked as carefully as any other.
Watch out
Common mistakes.
- Treating an overline as a harmless rounding issue, when it is a breach of a limit that was set for a reason.
- Approving a temporary overline with no end date, so it becomes permanent without anyone deciding to allow it.
- Forgetting that interest, fees and undrawn commitments can push total exposure beyond the limit.
Questions
People also ask.
Is an overline always against the rules?
Not always, since many institutions allow approved exceptions, but they must be recorded, justified and time-limited.
How does an insurer reduce an overline?
It can buy reinsurance, share the risk with other insurers, or ask the customer to accept a lower amount of cover.
Who approves an overline?
Usually a senior credit or underwriting committee, and larger ones may need board approval.
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