The Client that Stays
In the communications industry, agency turnover is a fact of life. Changes in direction, periodic pitches, the arrival of a new marketing director who brings their own contacts: everything contributes to making turnover a structural characteristic of the market.
There is no recent, reliable Italian statistic that definitively establishes the average duration of the agency-client relationship. The joint ANA/4As study published in April 2025 — one of the most solid benchmarks available, although based on the US market — places it at approximately seven years, with significant differences: independent agencies report an average of 7.3 years, those belonging to large groups stop at 5.8, and media agencies drop to 3.7. Relationships not subject to mandatory periodic reviews last an average of 8.1 years, while in the presence of frequent reviews the duration can fall to as low as 3.8 years.
Yet some collaborations last much longer — ten years, fifteen, in some cases more. And duration, in a market where switching providers is easy and often incentivised, is a data point worth paying attention to. Not as a value in itself, but as an indicator of something that works and that traditional metrics do not capture.
The Starting Point matters more than the Portfolio
In my experience, many of the longest-lasting collaborations were not born to manage something existing, but to build it.
A company approaching an agency for the first time often has no structured communication strategy. Sometimes it has no coherent visual identity, no up-to-date website, no planned digital presence. Sometimes it does not even have a defined communication budget, because until that point it had not felt the need — or had not been large enough to justify one.
This starting condition, which for many agencies represents a limitation — less budget, more educational work, longer timescales — can in reality be the most fertile ground for a lasting collaboration. Those who build together from scratch share a journey, not a deliverable. And a journey is far harder to replace than a single project.
Those who build together from scratch share a journey, not a deliverable. And a journey is far harder to replace than a single project.
Trust that grows with Results
There is a mechanism observed in long-term collaborations that is rarely discussed: the relationship does not grow because the budget increases. The budget increases because the relationship has produced results.
A company starting without a strategy invests little, because it has no reason yet to invest more. The agency that agrees to work within that initial budget — often inadequate relative to the effort required — is implicitly betting on the company’s growth and on its own ability to contribute to it.
If the work produces results, the client trusts. If they trust, they entrust the agency with greater responsibilities. If responsibilities grow, investments grow accordingly. It is a cycle that feeds on results and that takes years to consolidate — years in which trust is built through the right decisions taken together, not through presentations.
Coming in on an already consolidated budget, inheriting an existing strategy and managing campaigns already in flight creates a different kind of relationship. The barrier to exit is lower: if the agency is interchangeable with the previous one, it will be interchangeable with the next.
La relazione non cresce perché il budget aumenta. The budget increases because the relationship has produced results.
What makes a Collaboration Difficult to Replace
Duration is not a merit. It is a consequence. . And the reasons why a company chooses not to change agency, year after year, are rarely tied to a single factor.
Accumulated knowledge. An agency that has worked with a client for ten years knows the history behind every choice — why that colour, why that name, why that campaign worked and the other did not. This memory is not transferable through a handover briefing. It is lost, and with it years of context.
Direct Dialogue. In smaller structures — where the agency owner is also the creative director, the project manager and the daily point of contact — the client speaks with the person who decides. There is no account filter, no risk of the message being lost in internal handoffs. This immediacy has an operational value that more structured agencies struggle to replicate.
Personal accountability. When the person who signs the work is the same person who conceived, produced and delivered it, responsibility is not diluted. The client knows who to call if something does not work — and knows that person has a direct interest in solving the problem, not managing it.
Coherence Over Time. Communication built under a single creative direction over a long arc of time has a coherence that no brand manual alone can guarantee. Tones, visual choices and positioning evolve organically, without the discontinuities that every agency change inevitably introduces.
The Growth Paradox
There is an aspect of the long-term relationship that is rarely discussed and that concerns a structural paradox.
The agency that accompanied a company from nothing to a consolidated market position is often the same agency that, precisely by having done its job well, has made the client attractive to larger agencies. The company that five years earlier had no budget for a pitch now does — and the agencies that five years earlier would not have answered the phone are now knocking at the door.
This is perhaps the moment when the duration of the relationship takes on its greatest significance. As long as alternatives are few, staying may also be inertia. When the client has grown, has budget, receives proposals and is in a position to choose, staying becomes a decision.
In this scenario, continuity becomes a conscious choice, not a habit. The company that stays with the agency that accompanied its growth does so because it has evaluated the alternative and concluded that the accumulated value — in terms of knowledge, coherence, dialogue — exceeds what a new appointment could offer.
This choice is not always made. But when it is, it is the strongest signal that the collaboration has produced real value.
As long as alternatives are few, staying may also be inertia. When the client has grown, has budget, receives proposals and is in a position to choose, staying becomes a decision.
Duration as a Filter
For a company evaluating who to entrust with its communication, the duration of an agency’s collaborations is a more significant data point than it might appear.
A portfolio shows the best work, selected and presented in the most favourable light. A list of services describes what the agency claims to be able to do. But the duration of collaborations tells something else: the ability to keep a promise over time, to adapt to changes in the client company, to remain relevant when the starting conditions no longer exist.
It is the hardest metric to fake.
