1. Unvested Employer Contributions
401(k) plans often include both employee deferrals and employer matching or discretionary contributions. Employer contributions may be subject to a vesting schedule—meaning the participant doesn’t own 100% of these funds until they’ve worked a certain number of years. If a QDRO tries to assign part of an unvested balance, it could result in one spouse receiving less than expected if those funds are forfeited later.

