Employee and Employer Contributions
401(k) plans typically include employee contributions (which are usually 100% vested immediately) and employer-matching or profit-sharing contributions, which may be subject to vesting schedules. A QDRO can only divide what has been earned at the time of the divorce, so unvested amounts may not be eligible for division. Make sure your QDRO specifies the valuation date and only includes the vested portion of employer contributions.

