Employee vs. Employer Contributions
The first step in understanding any 401(k) division is distinguishing between what the employee contributed (typically pre-tax or Roth deferrals) and what the employer contributed through matching or discretionary amounts. In a QDRO, you can divide just the employee contributions, just the employer contributions, or both—depending on what’s considered marital property in your state.
Be cautious with employer contributions: they often come with a vesting schedule. If part of the account isn’t vested at the time of divorce, it may not be divisible. Your QDRO should clearly state whether only vested amounts are payable—or if non-vested amounts are included based on future vesting events.

