1. Employee vs. Employer Contributions
401(k) plans consist of both employee salary deferrals and matching or non-elective contributions from the employer. In divorce, either of these may be subject to division—but only the portion accrued up to the marital cutoff date (usually the date of separation or divorce judgment).
If your spouse contributed to their account post-separation, you’re not automatically entitled to those parts unless agreed otherwise. And while employee contributions are usually fully vested immediately, employer contributions often follow a vesting schedule, which brings us to the next point.

