A partial plan termination occurs when 20 percent or more of a company’s employees are laid off in one year. Routine turnover during the year is generally not considered a partial plan termination. To determine whether your turnover rate is routine, consider the following factors:

• What was your turnover rate during other periods and what was the extent to which terminated employees were actually replaced?
• Do the new employees perform the same functions as the previous employees? Do they have the same job classification or title? Do they have comparable compensation?

There is no requirement to notify the IRS of a partial plan termination, but all affected employees must be 100 percent vested in their account balance as of the date of the plan termination. If this hasn’t happened, a Voluntary Correction Program would be appropriate.