Employee vs. Employer Contributions
Employee contributions in 401(k) and 403(b) plans are usually fully vested—meaning they belong entirely to the participant. However, employer contributions (like matching funds) may be subject to a vesting schedule. If your spouse hasn’t been employed long enough to meet the vesting requirements, you may not be entitled to the full employer portion.
Your QDRO should clearly define whether you’re receiving a portion of only the vested balance, or also of future vesting as it occurs. This distinction can lead to big differences in outcomes.

