Employee vs. Employer Contributions
Employee contributions are usually fully vested and belong entirely to the employee. But any employer contributions may be subject to a vesting schedule. If the employee isn’t fully vested at the time of the divorce, the alternate payee (the spouse receiving a share) may only receive a portion of the employer matching.
In situations where some employer contributions are still unvested, a QDRO can be written to include a pro-rata share if those amounts become vested later—provided the employee stays with the company. This avoids unintentionally leaving benefits on the table.

