A 2008 study tracking 31 small business teams over 18 months found that unresolved interpersonal conflict in the first 60 days of a team forming had a direct correlation with higher staff turnover by month 9. The average cost of replacing one mid-level team member at the time was estimated at 6 to 9 months of that person's salary.
How conflict typically starts
It rarely begins with a serious incident. In 27 of the 31 cases studied, the origin point was a disagreement about task ownership or meeting expectations that was never formally resolved. Both parties assumed the other understood their position.
What managers did instead of addressing it
The most common response was restructuring around the conflict. Moving one person to a different project, adjusting reporting lines, or simply hoping the dynamic would improve with time. This delayed the visible problem by an average of 11 weeks while the underlying issue remained.
The point where it became irreversible
In most documented cases, conflict that was not addressed within the first 8 weeks had spread to at least 1 additional team member by week 12. At that point, resolution required significantly more management time and often external mediation.
What businesses consistently underestimate
Early conflict is not a sign of a broken team. Leaving it unaddressed for more than 2 to 3 weeks without a structured conversation is the actual mistake. A 30-minute facilitated discussion at week 3 is cheaper than a resignation at month 8.