Employee and Employer Contributions
Most 401(k) accounts contain a mix of employee and employer contributions. While the employee portions are always immediately vested, employer contributions may be subject to a vesting schedule. If your ex-spouse isn’t fully vested, unvested portions may not be divisible.
Your QDRO should specify whether you’re receiving a percentage of the entire account balance or only the vested portion as of a certain date (e.g., date of divorce or date of distribution).

