Employee vs. Employer Contributions
401(k) balances may include both the employee’s own contributions and the employer’s matching contributions. The QDRO must clearly state whether the alternate payee is entitled to a share of both, or just the employee’s portion.
With employer contributions, keep in mind that they may be subject to vesting. If the employee spouse is not fully vested, some of the employer-contributed funds may not be available for division. An unvested match can’t be divided.

