Why does a satisfied client book the next project elsewhere?
The short answer
A satisfied client books elsewhere because satisfaction is measured at project end while the next mandate is decided months later. For that later decision, the ending matters more than the total performance: in a randomized study, a better ending alone raised the probability of return by 41 percent, even with a more unpleasant overall experience.
Seven out of ten euros come from existing clients
The project went well, the final meeting was friendly, everyone said they would talk again for the next phase. Then nothing happens for months, and eventually you hear indirectly that the next phase happened with someone else.
The economics are clear. In professional services, about 70.7 percent of revenue comes from existing clients, and the share of new clients fell from 31.3 to 29.3 percent (SPI Research, 2025). Dependence on existing clients is increasing.
The acquisition asymmetry adds to it. New-client sales cycles are far longer than expanding an existing mandate. The more concentrated the client base, the more expensive every missing repeat engagement becomes.
Delivery reality has weakened
The comfortable explanation is that clients have become less loyal. The numbers show something else.
The share of clients that may be used as references fell from 70.1 to 68.2 percent. Average project overrun rose from 9.6 to 11.3 percent. 73.4 percent of projects were delivered on time, meaning every fourth project arrived late (SPI Research, 2025 and 2026).
Taken together, these values describe the real process. The client does not turn away because the collaboration was unpleasant. They turn away because the last project finished later than agreed, cost more than planned, and left them hesitant to put the consultancy’s name forward.
The end of an experience decides return
The strongest evidence comes from medicine. In a randomized study with 682 patients, one group received a longer procedure with a less unpleasant ending: objectively more discomfort overall, but a better final moment (Redelmeier, Katz & Kahneman, Pain, 2003).
That group later remembered the experience as less unpleasant. Duration hardly predicted memory. Over a median follow-up of 5.3 years, the group returned with a 41 percent higher probability after controlling for clinical factors.
The context is medical and cannot simply be transferred to business relationships. The mechanism is relevant: a return decision is made from memory, and memory follows the ending.
The final report is the weakest moment of the project
A classic consulting project ends with presentation of results and departure of the team. At precisely that moment, value for the client is at its lowest: the work has been paid for, the change has not yet happened, and the people who carried the project are no longer available.
Satisfaction is usually collected at this final meeting. The rating is good because it measures collaboration. The next mandate is decided months later and measures something else: what became of the recommendations.
Meanwhile, the consultancy is no longer in the house. The client sees the first initiative stall, accountability remain unclear or the topic slide down the executive agenda. The story of the project changes after the consultants have left.
A close that does not feel like farewell
The answer is not a better closing dinner. What carries the end of a collaboration is whether something keeps running that belongs to the client.
BizzPlAI starts where classic strategy consulting often ends. It generates initiatives from company data, strategy and several creative methods, calculates the expected value contribution to strategic goals, and keeps target, value contribution and stop condition findable from the decision onward.
For a consultancy, that turns project end into a quarterly rhythm with the executive team. The consultancy remains the expert for the strategic pillars, derives next measures and explains deviations. The close no longer looks like departure.
Check the last three completed mandates. What did the client still have the day after your team left? If the answer is a document, your close was a farewell, and the decision about the next project was made on a day when you were not in the room.
Common follow-up questions
Why is a good satisfaction score not enough?
Satisfaction is collected at project end; repeat work is decided months later. Between both points lies the phase in which recommendations either hold up in operations or do not. A good score says something about collaboration and little about the later decision.
What does the peak-end finding mean for project close?
Memory of an experience follows its peak and its end, hardly its duration. A project that ends with a final report and team departure ends at its weakest point. Designing the ending can shape memory more than adding effort in the middle.
How many clients does a small consultancy typically have per year?
In a survey of independent consultants, 58 percent reported working with six or fewer clients per year. The sample is self-selected and not representative, but it describes a real concentration risk.
Sources
- Professional Services Maturity Benchmark 2025SPI Research, 2025
- Professional Services Maturity Benchmark 2026SPI Research, 2026
- Memories of colonoscopy: a randomized trialPain (Donald A. Redelmeier, Joel Katz, Daniel Kahneman), 2003
- Consulting Statistics 2025Consulting Success, 2025
See how strategy arrives.
In 30 minutes, we show you how to steer your initiatives instead of merely managing them.