How to handle late B2B payments without damaging the commercial relationship

Why late payments are an operations problem, not a moral problem

The customer who pays late is not necessarily a bad customer. In the Mexican corporate environment, payment cycles of 30, 60 and 90 days are the norm in sectors such as construction, manufacturing, government and distribution. The overdue receivable is an operational phenomenon, not a judgment of the customer's willingness to pay. The mistake many collections teams make is to treat it as a moral problem and respond with premature pressure that breaks a relationship which, properly managed, can last another ten years.

The other mistake, even more common, is to do nothing. An invoice due on the 15th, remembered on the 45th, mentioned again on the 75th and written off in the books on the 120th, is not collections, it is retrospective accounting. When the finance team books the allowance for doubtful accounts on day 120, the damage is done: the customer has learned that they can pay at 120 with no cost, and the next cycle stretches to 150.

The real operational problem is the information asymmetry between the commercial team — which wants to keep the account open — and the finance team — which needs cash flow. When that asymmetry is not resolved through a standardised flow, every case is negotiated by feel, case by case, and each negotiation deteriorates the next one. What this playbook proposes is an eight-step protocol for managing delinquency from day one of the due date, with template letters, clear escalation paths and objective criteria for restructuring or closing.

The relevant legal framework in Mexico includes the Código de Comercio on default and protest, the Ley de Títulos y Operaciones de Crédito on the handling of promissory notes, and article 376 of the same law which regulates default interest. For businesses invoicing more than two million pesos per year with accounts receivable, it is worth having a promissory note signed by the customer at the start of the relationship, not when the dispute is already underway. The promissory note signed at the start changes the entire conversation.

This guide is designed for B2B programs with average tickets between MXN 50 000 and MXN 5 000 000 and portfolios of 20 to 200 active customers. For enterprise programs involving government or large corporates, the negotiation becomes political and falls outside the standardised flow; that is a different document.

Common mistakes that destroy both the relationship and the cash flow

The first mistake is not having a signed credit policy. Collecting without a signed policy means negotiating case by case, with results always worse than with a baseline.

The second mistake is threatening the customer on the first reminder. A threat on day 5 damages the relationship without giving the customer a chance to pay. Tone must escalate with the days, not start aggressive.

The third mistake is suspending supply without prior notice. Surprise suspension reads as punishment and breaks trust. Announced suspension with 15 days of anticipation is legitimate pressure; surprise is punishment.

The fourth mistake is restructuring without signing an agreement. A verbal payment agreement protects neither party. If the customer delays again without a signed agreement, the next collection starts from zero.

The fifth mistake is extending judicial collection beyond reason. A mercantile lawsuit that drags on for three years consumes legal team time and customer time. Sometimes it is better to negotiate a haircut and close the account than to win the lawsuit but lose the customer for the next ten years.

The sixth mistake is mixing collections with the commercial team. When the same executive who sold the account is the one collecting, the customer learns that pressuring the commercial contact is the route to discounts. Collections and commercial must be separate areas with a single point of confluence: the general management.