What it means
The most common meaning is the credit limit attached to an account. A bank might allow a business account to go to minus $25,000 and no further, and any payment that would breach the limit is declined or triggers extra charges.
The cap is set after the bank reviews income, history and the risk of the customer. The cap protects both sides.
The bank limits its potential losses, and the customer is stopped from building up borrowing that is hard to repay. Treasury teams treat the cap as part of the total funding available when planning cash needs.
A second meaning relates to fees. Regulators or banks in some markets limit the number of overdraft charges per day or the total charged in a month or year.
This is intended to prevent a small shortfall from growing into a large penalty bill. Business owners should keep a margin between normal borrowing and the cap.
A company that regularly sits at 95% of its limit has no room for surprises, and one late customer payment can result in refused supplier payments. Many treasurers keep average usage well below the cap.
Caps are reviewed from time to time and can be reduced if the bank is concerned about performance. A cap should therefore be backed up by other options, such as a revolving credit facility, rather than treated as guaranteed.
Some banks also set a lower buffer amount within the cap before extra charges apply. Reading the account terms carefully will show whether the cap you see is a hard stop or a soft one.
In practice
Real-world examples.
Example
A small restaurant has an overdraft cap of $10,000. On a slow week it dips to $7,500 overdrawn, leaving $2,500 of headroom. The owner delays a non-essential equipment order until takings recover.
Example
A property management firm in Dubai agrees a cap of $200,000 with its bank to cover maintenance costs before service charges are collected. The treasurer sets an internal alert at 80% of the cap. When the alert triggers, she moves funds from a savings account.
Example
A bank in one market caps the number of overdraft fees on a personal account at three per month. A customer who makes six small payments while overdrawn pays three fees, not six. The cap limits the damage from a short-term mistake.
Formula
Calculation
Available headroom = overdraft cap - amount currently overdrawn
Utilisation = amount currently overdrawn / overdraft cap
A business has an overdraft cap of $40,000 and its account is currently overdrawn by $34,000. Headroom = 40,000 - 34,000 = $6,000. Utilisation = 34,000 / 40,000 = 0.85, or 85%. If a supplier payment of $9,000 is due, the payment would take the account to $43,000 overdrawn, which is $3,000 over the cap, so it could be declined.
Reading the result: at 85% utilisation, the business has only 15% of its facility left, and a single large payment can breach the cap. Many treasurers set an internal alert at 70% to 80% so that action is taken before the bank refuses a payment.
It also helps to translate the cap into days of cover. If the business spends $8,000 a day on average and has $6,000 of headroom, the cap covers less than one day of outgoings (6,000 / 8,000 = 0.75 days), which makes clear how little room for error remains.Case study
Seen in the real world.
Northgate Logistics is an illustrative, fictional haulage firm with an overdraft cap of $60,000. Fuel and driver wages are paid weekly, while customers pay 45 days after delivery.
During a busy season, the account reached $58,000 overdrawn and then a fuel payment of $5,000 was declined. The drivers could not refuel on time and two deliveries were late, costing the firm a client.
Afterwards the finance manager began a weekly cash forecast and negotiated an invoice financing line to supplement the overdraft. The illustrative lesson is that a cap should be treated as a hard boundary and plans should be made well before it is reached.
Watch out
Common mistakes.
- Planning to use the whole cap as normal working money, which leaves no safety margin.
- Assuming the cap cannot change, when the bank can lower or withdraw it after a review.
- Confusing a cap on the overdraft amount with a cap on the fees charged on it.
Questions
People also ask.
What happens when you reach the cap?
Further payments are normally declined, or accepted with an extra unarranged charge, depending on your bank.
Can the cap be increased?
Yes, you can ask the bank for an increase, though it will look at your accounts, cash flow and security.
Is a cap the same as a credit limit?
For an overdraft the two are effectively the same thing, as both set the maximum you can borrow.
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