Employee vs. Employer Contributions
Most 401(k)s include both employee contributions (from the participant’s paycheck) and employer contributions (such as matches). In divorce, both types of contributions can be divided—but only if they’re vested. Many employer contributions are subject to a vesting schedule, where the employee earns rights to them over time. Any unvested portion is usually forfeited upon separation of employment—which means the alternate payee (typically the ex-spouse) can’t receive a share of those funds.
What this means for your QDRO: it needs to be crystal clear whether it divides only vested amounts as of a specific date, or includes future vesting. If you’re not careful, you might leave money on the table or fight over money that’s not even available.

