1. Traditional vs. Roth 401(k) Balances
This plan may include both traditional and Roth 401(k) accounts. Traditional 401(k) balances are pre-tax—distributions are taxed when taken. Roth 401(k) balances are post-tax—distributions are usually tax-free if held long enough.
Your QDRO must state whether the division includes both types of funds, and if so, how they should be allocated. Some plans require proportional division across account types; others allow you to specify the source. Leaving this vague is one of themost common QDRO mistakes.

