What it means
Every supplier that sells on credit is lending. The credit limit is the size of the loan the supplier is willing to make to each customer, and setting it is a credit decision on a small scale: how much can this customer be trusted to pay, and how much would the supplier lose if it did not?
Setting the limit combines information and judgement. Information: the customer's filed accounts (size, profitability, liquidity, leverage, trend), a credit agency report (rating, recommended limit, payment behaviour reported by other suppliers, court judgments, ownership), trade references, bank references where available, the customer's own application, and, for existing customers, their payment history with the supplier.
Judgement: the expected monthly business (a limit must accommodate the normal balance, which is roughly monthly sales times the credit period in months, plus a margin), the supplier's exposure appetite (a rule such as no customer above 10% of receivables, or above a fixed amount without senior approval), the margin on the business (a high-margin sale justifies more risk than a thin one), and the strategic importance of the customer. Enforcing the limit is the operational half.
Order entry systems check the customer's exposure (open invoices plus orders in progress) against the limit and hold orders that exceed it; credit control reviews the held orders, releases them if a payment is due or a temporary extension is justified, or contacts the customer for payment before release. The hold is the moment of leverage: a customer who wants the goods will pay the overdue invoice.
Weak enforcement (limits routinely overridden by sales, or not checked at all) makes the limit meaningless. Reviewing the limit keeps it right.
Limits are reviewed annually for all customers and immediately on triggers: payment slowing beyond terms, a returned cheque or failed direct debit, adverse agency information, a change of ownership, a request for a large increase, or news of difficulty. Increases are granted on evidence (a year of prompt payment, growth in the customer's business, improved accounts); reductions are made promptly when risk rises, since the supplier's exposure is the balance the customer can run up before anyone notices.
Credit insurance and factoring interact with limits: an insurer sets its own limit per customer, and the supplier's limit is often aligned with it so that the exposure is covered; a factor advances against approved customers within limits it sets. Some suppliers use the insurer's or agency's recommended limit as their own; larger ones set their own with the external figure as a reference.
From the customer's side, credit limits are a resource. A business with $500,000 of supplier credit limits has $500,000 of trade finance available at no interest, provided it pays on terms; a business whose limits are being cut is being told something by the market, and its finance team should know why.
Managing supplier limits means paying on time (the strongest evidence for an increase), sharing accounts and information with key suppliers, negotiating increases before seasonal peaks, and avoiding the pattern of maximising every limit that signals stress to every supplier at once.
In practice
Real-world examples.
Example
A software reseller sets limits for 2,000 business customers using an automated scoring model fed by agency data, with manual review above $25,000.
Example
A steel stockholder aligns every customer's limit with its credit insurer's approved limit, so that its receivables are 90% covered.
Example
A company negotiating a seasonal stock build asks its main suppliers to raise its limits by 50% for three months, supported by its cash flow forecast and a letter from its bank.
Think of it
“A credit limit is the maximum you'll let a customer owe you-your risk ceiling for that account.
Formula
Calculation
Required limit (normal trading) = Expected monthly credit sales x (Credit period in months + Margin for timing), typically 1.5 to 2 times monthly sales on 30-day terms
Exposure = Outstanding invoices + Orders accepted but not yet invoiced + Goods in transit
Headroom = Credit limit minus Exposure
Maximum loss if the customer fails = Exposure minus Recoveries (insurance, security, dividends in insolvency)
Exposure concentration = Customer's exposure / Total receivables
Worked example. A building materials distributor sets and manages the limit for a new customer, a regional contractor.
Application and information: the contractor expects to buy $40,000 a month on 30-day terms. Its filed accounts show revenue $6,000,000, net profit $180,000, current ratio 1.3, net assets $650,000, bank debt $400,000. The credit agency rates it as moderate risk with a recommended limit of $50,000 and reports average payment at 12 days beyond terms. Two trade references report satisfactory payment on limits of $30,000 and $45,000.
Required limit for normal trading: $40,000 x (1 month + 0.5 month margin) = $60,000. The distributor's policy caps new customers at the agency's recommendation for the first six months: limit set at $50,000, with orders above it held for credit control review. Exposure concentration: $50,000 against total receivables of $3,200,000 = 1.6%, within the 5% policy for a single customer at this risk grade.
Month 4: exposure reaches $58,000 (two months' invoices, the first now 8 days overdue, plus a $12,000 order in progress). The system holds the order. Credit control calls the contractor, which pays the overdue $21,000 the same day; exposure falls to $37,000 and the order is released. The hold has produced a payment that a statement would not.
Month 7: six months of history show payment averaging 6 days beyond terms, better than the agency's report. The contractor asks for a $90,000 limit for a large project. Credit control reviews: the project is a public sector job (a good payer); the contractor's latest management accounts (supplied on request) show revenue up 15%; the agency rating is unchanged. The limit is raised to $80,000 with a condition that the project's invoices are paid within 30 days, and the credit insurer's limit is increased to match. Concentration 2.5%.
Month 14: the contractor's payments slip to 25 days beyond terms, a cheque is returned, and the agency reports a county court judgment for $8,000 from another supplier. Exposure is $76,000. Credit control reduces the limit to $40,000 (holding all new orders until the exposure is below it), requests payment of the overdue $52,000 within seven days, and asks for a meeting. The contractor pays $30,000 and explains a dispute with a client. The distributor agrees to supply further orders on a cash-with-order basis until the balance is cleared, and moves the account to weekly review. Maximum loss if the contractor fails now: $46,000 exposure, less the insurer's 90% cover on the $40,000 insured limit ($36,000): about $10,000. Had the limit been left at $80,000 and orders continued, exposure could have reached $95,000 with the same insurance: a potential loss of $59,000.
Month 16: the contractor enters administration. The distributor's exposure is $9,000 (the cash-with-order regime had cleared the rest); the insurer pays $8,100; the loss is $900. The credit controller's report notes that the limit and its enforcement had converted a potential $59,000 loss into $900, and that the sales manager's complaint about "losing orders" in months 14 and 15 had been answered.Case study
Seen in the real world.
A packaging manufacturer's sales director had authority to override credit limits, and used it: any order from a customer whose limit was full was released on his say-so, because "we don't lose sales to credit control". Its largest customer, a food company, had a limit of $150,000 and an exposure that had grown to $410,000 over eighteen months through repeated overrides, with invoices routinely paid 60 days late. The finance director's monthly report showed the exposure, and the board noted it.
When the food company failed, the manufacturer's loss was $380,000, its largest ever, and its credit insurer declined the claim because the exposure exceeded the insured limit by $260,000 and the overrides breached the policy's conditions. The company's credit policy was rewritten: limits could be exceeded only with the finance director's written approval, for a stated period, with a stated reason; the sales director's authority was removed; the insurer's limit became the hard ceiling; and the board pack reported the ten largest exposures against their limits, with any override listed. The finance director's note observed that the company had had a credit limit for its largest customer and had never once applied it.
Watch out
Common mistakes.
- Setting limits and not enforcing them, or allowing sales staff to override them, which converts the limit into a number in a file.
- Leaving limits unreviewed as customers grow, decline or change ownership, so that limits are too tight for good customers and too loose for deteriorating ones.
- Exceeding the credit insurer's limit, which leaves the excess uninsured and may void cover on the whole account.
Questions
People also ask.
How should a credit limit be set?
From the customer's creditworthiness (accounts, agency report, references, history), the expected trading volume (roughly 1.5 to 2 times monthly sales on 30-day terms), the supplier's exposure appetite and the margin on the business. Start conservatively and increase on evidence.
What should happen when a customer reaches its limit?
Orders are held; credit control reviews the account; if payment is due, it is requested before release; if the customer's position justifies it, a temporary or permanent increase is approved by someone with authority. The hold is the supplier's leverage.
How often should limits be reviewed?
Annually for every customer, and immediately on triggers: slow payment, returned payments, adverse information, ownership changes, or a request for a large increase.
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