If one of your top performers resigned tomorrow, how much would it actually cost your firm?
This is a question every firm leader should ask themselves.
Most leaders instinctively think about recruiting fees or a salary adjustment required to hire a replacement. Yet the true impact runs far deeper. The departure of a high performer can disrupt momentum, delay initiatives, strain leadership bandwidth, and affect the performance of the broader team.
Data from the KHS People Salary Data and Intelligence report shows how active the talent market has become. Within the past twelve months, 56% of business professionals in law firms reported that they have considered looking for a new role, and an additional 12% have already moved to a new law firm.
That single statistic should cause every firm leader to pause.
Pre-Management Versus Management Roles Breakdown
Pre-Management Roles
- 66% have thought about moving to a new law firm within the last 12 months.
- 8% have moved new law firm within the last 12 months.
- 26% have not thought about moving to a new law firm within the last 12 months.
Management Roles
-
55% have thought about moving to a new law firm within the last 12 months.
- 13% have moved new law firm within the last 12 months.
- 32% have not thought about moving to a new law firm within the last 12 months.
When demand for experienced professionals reaches that level, top performers are effectively being recruited by the market whether they are actively searching or not. At the same time, compensation for senior marketing and business development leadership roles has risen significantly in recent years.
When the market moves quickly and demand for talent increases, retention shifts from a human resources concern to a broader business risk.
The true cost of losing a top performer goes far beyond filling the position.
Opportunity Cost
The first and most overlooked impact is opportunity cost. Opportunity cost reflects the value of progress that would have occurred if that individual were still contributing in their position. It captures not only the work that stops when someone leaves, but the forward movement that never happens.
Top performers typically drive initiatives forward. They build relationships, move projects ahead, identify new opportunities, and help the organization operate at a higher level of effectiveness.
When they depart, those initiatives can stall.
A strategic marketing campaign may lose the person guiding its direction. A business development effort may lose the professional who cultivated critical client relationships. Internal improvement initiatives may lose the individual who understood how to move them toward completion.
Even when a replacement is hired quickly, the momentum that was built over months or years can disappear overnight. Rebuilding that momentum takes time, and in many cases organizations never fully recover the lost progress.
Institutional Knowledge
Another significant impact involves institutional knowledge.
Experienced professionals carry a deep understanding of how the organization functions. They know the context behind past decisions and understand which approaches have historically succeeded or failed.
They also understand the internal dynamics of the firm.
They know who to involve to move an initiative forward. They understand how different leaders prefer to communicate and make decisions. They know the background behind important projects that shaped the organization.
Much of this knowledge is never documented.
When a high performing employee leaves, that accumulated insight leaves with them. The individual stepping into the position may possess strong technical capabilities, but they begin without that historical understanding.
Developing that same familiarity with the organization can take months and sometimes years.
During that period, decision making slows, projects require additional explanation, and teams lose the efficiency that experience once provided.
Leadership Time: Recruiting, Interviewing, and Onboarding
Replacing a senior professional also demands significant leadership time and attention.
Recruiting a replacement requires coordination across multiple leaders in the firm. Candidates must be reviewed, interviews must be scheduled, and decision makers often spend considerable time evaluating and discussing potential hires.
Even after the hiring decision is made, the process continues.
The new professional must be onboarded and integrated into the team. They need time to understand the structure of the firm, the expectations associated with the role, and the relationships that drive collaboration across departments.
During this transition period, productivity rarely matches the output of the individual who previously held the position.
Leadership attention that could be directed toward strategic initiatives instead becomes focused on rebuilding the role.
Missed Performance Targets During the Vacancy
Turnover also affects organizational performance.
Every role carries defined expectations. These may include revenue generation, client development activity, marketing initiatives, operational improvements, or other strategic contributions.
When a position remains vacant, those expectations often remain unmet.
Colleagues may attempt to absorb the responsibilities temporarily, but they are already managing their own workloads. While they may maintain basic continuity, matching the performance of a dedicated team member is rarely possible.
Key initiatives slow. Revenue related activity may pause. Important projects remain incomplete.
The KHS People salary data also shows how competitive the market has become for experienced professionals. As compensation rises and firms recruit talent from one another, vacancies can remain open longer than leadership anticipates.
What appears to be a short vacancy on paper can translate into months of reduced output across multiple areas of the organization.
Team Morale and Leadership Pressure
The final impact involves team morale and leadership pressure.
When a respected colleague departs, the rest of the team quickly notices the shift. Questions naturally begin to arise.
Why did they leave?
What does this mean for the team?
Will workloads increase?
Managers frequently absorb the immediate strain. They may temporarily take on additional responsibilities while also leading the hiring process.
At the same time, they must maintain stability within the team and keep work progressing.
For remaining team members, uncertainty can influence motivation and focus. When departures occur repeatedly, turnover can begin to reinforce itself.
Retention is not simply about keeping one employee; when turnover begins, the stability and effectiveness of the entire team can quickly become visible to headhunters and potential competing law firms.
KHS People Final Thoughts
When a top performer leaves, the consequences extend far beyond filling the position.
There is the opportunity that disappears, the institutional knowledge that cannot easily be replaced, the leadership attention redirected toward hiring, the performance targets that go unmet, and the pressure placed on the team that remains.
These effects rarely appear on a balance sheet, yet they shape the long term strength of an organization.
In a market where compensation continues to rise and firms compete aggressively for experienced professionals, the true advantage may not be hiring great talent.
It may be creating the conditions that make those individuals choose to stay.
