Employee and Employer Contributions
Most 401(k) plans include both employee salary deferrals and employer matching or discretionary contributions. These must be addressed separately in your QDRO. As the employee spouse adds money over time, it’s also possible the non-employee spouse may only be entitled to a portion of the contributions made during the marriage.
More importantly, not all employer contributions are fully owned by the employee right away. This brings us to the issue of vesting.

