Employee and Employer Contributions
401(k) plans typically involve employee deferrals (money the employee contributes) and employer contributions (such as matching or profit sharing amounts). The QDRO must address whether both sources are being divided or just the employee portion.
Keep in mind: employer contributions may be subject to a vesting schedule—meaning some of the balance may not belong to the employee (and therefore not divisible) if they haven’t worked at the company long enough.

