1. Employer Contribution Vesting
One of the key issues is vesting. Not all employer contributions are fully “yours” until you meet certain service requirements. If you’re not fully vested by the time of divorce, those unvested amounts may be forfeited entirely—meaning your spouse won’t have a right to that portion either.
This is critical to keep in mind when deciding on a split percentage. A 50/50 division without considering vesting might leave the non-employee spouse with less than expected in the final distribution.

