Employee vs. Employer Contributions
One common mistake we see is assuming both portions of the 401(k) are always divisible. The reality is more complex. The participant’s own salary deferrals (employee contributions) are always divisible, but employer contributions are subject to vesting schedules which may reduce what the non-employee spouse can receive.
We carefully review whether any of the employer’s matching funds have not yet vested. If they’re unvested as of the separation date, those amounts usually cannot be divided and might be forfeited if the participant leaves the company.

