Employee vs. Employer Contributions
A 401(k) plan often includes both employee contributions (direct payroll deferrals) and employer contributions (such as matching funds). In most divorces, the marital portion of employee contributions is divided based on the time the couple was married while the participant contributed.
However, employer contributions may be subject to a vesting schedule. That means any unvested portion at the time of divorce may not be available for division. A successful QDRO must clearly lay out how to divide vested vs. unvested funds—or handle forfeitures of unvested shares if they occur.

