Employee vs. Employer Contributions
401(k) accounts typically include both the employee’s deferrals and contributions made by the employer. However, some employer contributions may be subject to vesting schedules. A QDRO must clearly separate vested versus unvested portions so the alternate payee only receives a share of what the participant truly owns.
In most cases, the QDRO will only divide the vested portion of the account as of a specific cut-off date (often the date of separation or divorce). If continued service with the employer causes additional vesting, that added value may not be part of the divided portion unless the QDRO is drafted accordingly.

