Unvested Employer Contributions
One of the biggest pitfalls is assuming that the full 401(k) account balance is available for division. Many corporate 401(k) plans, especially those in general business industries like this one, include employer contributions that are subject to vesting schedules. This means the participant may not own the full employer-contributed portion of the account at the time of divorce.
If the QDRO tries to divide parts of the account that the participant hasn’t yet vested in, the alternate payee may end up receiving nothing or less than expected. That’s why it’s important to clarify in the QDRO whether the division includes only vested amounts or future vesting as well.

