Employee and Employer Contributions
Dividing a 401(k) depends on whether you’re dealing with employee (what the participant put in) or employer contributions (matching or profit-sharing). While employee contributions are always fully vested and can be divided under a QDRO, employer contributions may be subject to a vesting schedule. That means some of the employer match might not be earned by the time of the divorce—if it’s unvested, it’s probably not on the table for division.
Make sure your QDRO takes into account what was vested as of the date of division (commonly the date of divorce or separation). A statement from the plan administrator will often show this detail.

