1. Employee and Employer Contributions
During the marriage, the marital portion of a 401(k) usually includes all amounts contributed from the date of marriage to the date of separation. This includes contributions made by the employee and, in most cases, matching contributions from the employer. These must be valued and divided accordingly.
However, employer contributions are subject to vesting. The non-participant spouse may only be entitled to a portion of contributions that are fully vested.

