On my quarterly statement and the 401K plan website I can see the vesting for various categories.
- A: My contribution (100% vested)
- B: My dividends (100% vested)
- C: Company Match (60% vested)
- D: Employer Contribution Dividends (100% vested)
They total all these up and report the total balance and the vested balance.
If I do the math I discover that the vested balance is equal to A + B + D + (60% of C)
For my company at least, if I was to leave now I would get 60% of the Company match, which does include significant gains.
This document for the Department of Labor discuss many aspects of 401K plans including vesting.
In a defined contribution plan such as a 401(k) plan, you are always
100 percent vested in your own contributions to a plan, and in any
subsequent earnings from your contributions. However, in most defined
contribution plans you may have to work several years before you are
vested in the employer’s matching contributions. (There are
exceptions, such as the SIMPLE 401(k) and safe harbor 401(k), in which
you are immediately vested in all required employer contributions. You
also vest immediately in the SIMPLE IRA and the SEP.)
Currently, employers have a choice of two different vesting schedules
for employer matching 401(k) contributions, which are shown in Table
2. Your employer may use a schedule in which employees are 100 percent vested in employer contributions after 3 years of service (cliff
vesting). Under graduated vesting, an employee must be at least 20
percent vested after 2 years, 40 percent after 3 years, 60 percent
after 4 years, 80 percent after 5 years, and 100 percent after 6
years. If your automatic enrollment 401(k) plan requires employer
contributions, you vest in those contributions after 2 years.
Automatic enrollment 401(k) plans with optional matching contributions
follow one of the vesting schedules noted above.