Employee vs. Employer Contributions
Most 401(k) plans consist of employee salary deferrals, employer matching contributions, and possibly profit-sharing amounts. While all employee deferrals are 100% vested immediately, employer contributions may be subject to vesting schedules.
If you’re the alternate payee, you’ll want to confirm what portion of employer contributions is vested as of the date used for division—usually the divorce date or another date agreed upon in the settlement. Unvested amounts are typically delayed or may eventually be forfeited if the employee spouse changes jobs before fully vesting.

