Employee Contributions vs. Employer Contributions
A 401(k) plan often involves both employee and employer contributions. The employee’s salary-deferral portion is 100% owned by the employee, but employer contributions are usually subject to a vesting schedule. If the divorce occurs during employment, some of those employer-funded dollars might not be vested yet—and therefore aren’t divisible in the QDRO.
You need to be careful not to award unvested employer contributions in the QDRO if they are not legally available for transfer. It’s also important to clearly define whether the alternate payee will receive a percentage of the total balance or just the vested portion as of a specific date. If you use language that includes unvested funds, the order may be rejected by the plan.

