Customer Concentration Is Also a Calendar Problem

A commercial perspective on concentrated revenue: renewal dates, replacement time and the commitments that continue after a major customer leaves.

A percentage does not describe the whole exposure

Knowing that one customer accounts for a large share of revenue is useful. It is not a complete description of dependence. A business also needs to understand when that revenue can change, how quickly costs can adjust and how much time it would take to replace the work. Concentration has a calendar as well as a percentage.

This is a commercial planning argument, not an empirical claim that a particular concentration ratio predicts failure. Two hypothetical firms could receive the same share of sales from their largest customer while facing different risks. One may have flexible resources and staggered commitments. The other may have dedicated premises, specialist equipment and a renewal decision immediately before its own obligations become difficult to reverse.

Put the customer decision beside your own decisions

Begin with the dates on which the customer can reduce, renew or end the arrangement. Then place alongside them the supplier’s decisions: hiring, equipment purchases, lease extensions and other commitments made to serve the account. The purpose is to find places where the business becomes committed before the customer does.

A hypothetical service company may have to renew a dedicated office in September while its largest customer decides on another year in December. The three-month mismatch deserves attention even if the relationship feels secure. The company could explore a different lease structure, negotiate earlier visibility or accept the exposure explicitly. The calendar makes the choice visible instead of leaving it hidden inside a broad statement that the account is important.

Separate an encouraging conversation from a commitment

A customer may sincerely expect to continue and still lack approval to confirm. The supplier should distinguish enthusiasm, an approved budget, a purchase order and an enforceable obligation. These are not interchangeable forms of evidence. Their precise legal effect depends on the agreement and jurisdiction, but a planning conversation can recognise the distinction without pretending to resolve a legal question.

Ask what remains to happen before the customer can make its decision. Is another person authorised to approve? Is the work itself changing? Is the timing known? A useful answer identifies the next decision and the remaining uncertainty. Repeated reassurance without an identifiable approval path should not quietly become the basis for expenditure that the supplier cannot comfortably reverse.

Measure replacement time realistically

Replacing a major account is not simply finding another buyer willing to pay the same amount. The new work may need different capabilities, a different delivery schedule and a different period before invoicing begins. A sales lead can be promising without yet supplying the operational substitute the business needs.

A practical scenario should therefore include the time to identify suitable prospects, win the work, onboard the customer and receive payment. These are assumptions to examine, not numbers to invent with false precision. Use ranges where appropriate and explain what would shorten or lengthen them. The resulting picture may show that the business needs to begin broadening demand well before any customer signals a departure.

Do not confuse diversification with accepting every account

A smaller share from the largest customer can be achieved by adding work that is unattractive in other ways. Poorly priced projects, incompatible delivery needs or unreliable payment can make a portfolio look less concentrated while weakening the business. The objective should be a more resilient set of relationships, not merely a better percentage.

Examine which prospective customers use capabilities already present and which require a new fixed commitment. A smaller account that can grow gradually may provide a useful option. Another that demands dedicated resources immediately may reproduce the same dependence at a smaller scale. Diversification deserves the same commercial judgment as the original major account, including the ability to decline work that does not fit.

Build a response before the outcome is known

A concentration review should describe what the company would do if renewal were delayed, reduced or lost. That could include postponing a discretionary commitment, reallocating capacity or accelerating a specific sales effort. The actions should be linked to observable developments rather than triggered by a general feeling of anxiety.

The plan also needs to preserve the relationship. Preparing for a possible exit does not require treating the customer as disloyal or demanding information it cannot responsibly supply. A professional discussion explains why timing matters and asks for usable visibility. Internally, a contingency should be clear about who decides and what evidence is sufficient to act. Otherwise the business may keep waiting for certainty until its options have narrowed.

The valuable number is the time left to choose

Concentration is easier to manage when the business can see the sequence of decisions approaching it. A revenue percentage identifies importance. The calendar reveals whether there is still time to adapt. Bringing them together makes an abstract risk commercially specific: which commitment is next, what remains unknown and what option should be preserved?

This does not make a large customer undesirable. A substantial relationship can support focused expertise and useful scale. The question is whether the business understands the dependence it is accepting. When customer renewal, replacement time and the supplier’s own commitments are examined together, management can choose its exposure with clearer eyes. The aim is not to remove uncertainty but to avoid surrendering choices before the uncertainty is resolved.

Gabriel Nicolaev — CyGuru

Editorial photograph for illustration.

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