1. Employee and Employer Contributions
401(k) accounts can build up from three common sources:
- Employee pre-tax or Roth contributions
- Employer matching or non-elective contributions
- Investment earnings
It’s not just about how much is in the account today—it’s when the contributions were made. Employer contributions might be subject to vesting, meaning some of the funds may not fully belong to your spouse at the time of divorce. The QDRO should clearly define the portion of the account balance earned during the marriage—to the exclusion of what was earned before or after.

