Deciding whether to stop supplying an overdue customer

The scenario

A customer is well overdue but still placing orders, and you are weighing whether to keep supplying them. Continuing means the debt grows and your exposure deepens; stopping means leverage, but also the risk of escalating a chase into a rupture, especially if the customer depends on your supply to run their own operation. The decision is uncomfortable precisely because supply is such a powerful lever — refusing to fulfil orders concentrates a debtor's attention like little else, but it is also the kind of step that can sour or end a relationship if you get the timing or manner wrong.

What's really going on

Stop-supply works as leverage because, for many customers, your goods or services are something they genuinely need to keep operating — so the prospect of losing them creates an urgency that reminders never will. That is exactly why it must be handled carefully. The same power that makes it effective makes it dangerous: pull supply abruptly or without a clear right to do so and you can trigger a dispute, a breach-of-contract argument, or the immediate loss of a customer who might otherwise have paid. Two factors decide whether it is the right move — whether your agreement actually permits you to withhold supply for non-payment, and whether the leverage is proportionate to the debt. Often the threat of stopping supply, clearly communicated, achieves the result without your ever having to follow through.

Your options

Stop-supply is best thought of as a graded lever, not a single switch:

• Signal first. Warn that further orders will not be fulfilled until the overdue balance is cleared — the warning alone often prompts payment.
• Move to cash terms. Continue supplying, but only on payment-up-front, so you keep the relationship without growing the debt.
• Pause non-essential supply. Hold new credit orders while honouring existing commitments, limiting disruption.
• Stop fully. Withhold all further supply until the account is brought to order — the strongest step, reserved for serious or persistent default.

Recommended approach

Before you do anything, confirm you have the contractual right to withhold supply for non-payment — check your terms, and be cautious about pausing supply you are obliged to provide, as wrongfully stopping can expose you to a breach claim. Then use the lever in stages rather than all at once. Start by clearly signalling the consequence: tell the customer, in writing, that further orders will be placed on hold until the overdue amount is settled. This warning frequently does the work on its own, because the customer would rather pay than lose access to what they need. If they still do not act, follow through proportionately — moving them to payment-up-front terms is often a sensible middle path that protects you while keeping the relationship alive. Keep the decision fair, documented, and reversible: make clear exactly what payment restores normal supply, so the customer has an obvious route back. The aim is to change behaviour, not to punish. For how this fits a wider escalation ladder, see knowing when to escalate.

What to avoid

Do not stop supply you are contractually bound to deliver without taking advice; wrongful withholding can turn you from creditor into defendant. Do not pull supply abruptly and without warning when a clear signal would likely have prompted payment — the threat is usually more valuable than the act. Do not use stop-supply as a punishment with no path back, leaving the customer no incentive to pay because there is nothing to restore. And do not apply it disproportionately, cutting off a major customer over a trivial balance, where the damage to the relationship outweighs anything you recover.