Employee vs. Employer Contributions
This plan likely includes both types of contributions. Employee contributions are straightforward—they’re the participant’s money. Employer contributions, however, may be subject to a vesting schedule. If a participant isn’t fully vested at the time of divorce, the non-vested amount can’t be awarded to the alternate payee.
This is why timing is crucial. If you divide the account based on the vested balance only, your share could be significantly smaller. On the other hand, some QDROs reserve jurisdiction over future vesting, allowing a later division of employer contributions as they vest.

