Division of Employee and Employer Contributions
The first thing to identify is how much of the account is marital and how much is separate. Usually, contributions made—and investment gains accrued—during the marriage are considered marital property. A QDRO should specify whether both employee and employer contributions are included in this division.
Many employer-sponsored 401(k) plans offer matching contributions. These are typically subject to a vesting schedule, which means they may not all be fully owned by the employee at the time of divorce.

