1. Employer Contributions and Vesting
401(k) plans often combine employee deferrals with employer matches or profit-sharing. These employer funds may be subject to a vesting schedule. If the participant spouse is only partially vested at the date of divorce or division, the non-vested portion typically isn’t available for division.
Your QDRO should specify whether the alternate payee’s share comes from only vested amounts or whether future vesting is included. This detail can shape the alternate payee’s benefit significantly.

