1. Employee vs. Employer Contributions
In most 401(k)s, the participant (employee) contributes a percentage of their pay, and the employer may match a portion of that. A QDRO can cover both types of contributions, but employer contributions may be subject to a vesting schedule. If some employer contributions aren’t yet vested, they may not be available for division.
Make sure your QDRO makes it clear whether the alternate payee gets a percentage of the total account (including vested employer contributions) or just the employee contributions. The details here can make a big difference in the final amount transferred.

