1. Employee vs. Employer Contributions
401(k) plans often include both employee contributions (the money your spouse contributed from paychecks) and employer matches or other employer contributions. Each type may be subject to different rules—particularly when it comes to vesting.
- Fully Vested Employee Contributions: Generally available for immediate division.
- Employer Contributions: May be partially or fully unvested, depending on the plan’s vesting schedule.

