Employee Contributions vs. Employer Contributions
Employee contributions in 401(k) plans are always 100% vested, meaning the employee fully owns them. However, employer contributions (like matching funds) may be subject to a vesting schedule. This means the employee only earns full rights to these amounts over time.
When dividing these assets, it’s essential to separate out what’s vested (dividable) vs. unvested (not divisible yet or ever). Your QDRO should clearly state whether it divides just the vested balance or includes any unvested amounts that may eventually vest.

