1. Identifying Traditional vs. Roth Subaccounts
This plan could contain both traditional 401(k) and Roth 401(k) subaccounts. It’s important to determine whether the participant has made pre-tax (traditional) or after-tax (Roth) contributions—or both. Each has different tax treatment when distributed:
- Traditional 401(k) contributions are taxed when withdrawn.
- Roth 401(k) contributions have already been taxed, so qualified distributions are tax-free.
Your QDRO must clarify which portion—Roth, traditional, or both—is being divided. Failing to distinguish them can result in unexpected tax bills for the alternate payee or even rejection by the plan administrator.

