Employee vs. Employer Contributions
Most 401(k) plans include both employee deferrals and employer matching contributions. In divorce, the critical issue is whether the employer matching funds are fully vested. Many plans have a multi-year vesting schedule. That means part of the employer contributions may not be “earned” until the employee has stayed with the company for a certain period.
If the divorce happens before full vesting, the alternate payee shouldn’t expect to receive a share of the unvested amounts unless the QDRO expressly includes them as contingent benefits. Your QDRO must clearly define what’s marital, how much of that is vested, and how to treat future vesting if it applies.

