Employee vs. Employer Contributions
The employee’s own contributions (plus investment gains/losses) are almost always 100% marital property. But a big mistake people often make is assuming the employer’s contributions are also fully divisible. Most 401(k) plans have a vesting schedule—especially in General Business environments like this one.
If your spouse isn’t fully vested at the time of divorce, part of the employer-contribution account may not be available to divide. Your QDRO needs to specify that only the vested portion should be calculated OR provide a snapshot date that freezes the value to a specific point in time.

