Employee and Employer Contributions
Employees contribute pre-tax or Roth after-tax dollars to their 401(k) accounts. Employers may also contribute, often in the form of matching or profit-sharing contributions. In a QDRO, employee contributions are usually 100% transferable—but employer contributions are subject to vesting rules. If part of the employer contributions is unvested, that portion can’t be awarded to the alternate payee (the former spouse).
Make sure your QDRO identifies which portion of the account is being divided. A well-drafted QDRO can clarify whether just the marital portion is split or the entire balance as of a certain cutoff date.

