Eligibility is the part of a retirement plan that touches the headcount plan most directly, because it turns a hire into a cost on a date. A plan may impose conditions of age and service within what the rules allow, and the plan document is where yours are written. This page sets out the shape of the conditions, the long-term part-time change that caught a lot of employers out, and the one report an employer should be able to produce every month without asking anybody.
Age and service, within limits the plan cannot exceed
A plan may require a minimum age and a period of service before somebody may participate, and the rules cap how demanding those conditions can be. Whatever yours are, they are in the plan document and they are the thing that decides when a hire starts costing you a contribution. An employer that cannot state its own conditions from memory should be able to state them from the plan record, which is not the same as asking the administrator.
Entry dates are where the surprise lives
Satisfying the service condition and being able to join are two different dates, because plans admit people on entry dates rather than continuously. A quarterly entry date means somebody who qualifies in April joins in July, which is fine as long as everybody involved knows. Most eligibility complaints are actually entry date complaints, and they are avoided by communicating both dates at hire rather than the first one.
The long-term part-time rule
The significant recent change is that consistently part-time employees can no longer be excluded indefinitely by a full-time service condition: sustained part-time service over the period the rule names brings somebody in. For an employer with a large part-time population this is a headcount cost that arrives on a schedule, and the thing to do about it is to know which part-time employees are approaching the threshold rather than to discover it at year end.
The one report to insist on
Who became eligible last month, who will become eligible in the next three, and who ceased to be eligible. If your plan's administrator cannot produce that, eligibility is being stored rather than applied, and the cost of each newly eligible person is arriving as a surprise. Keep the conditions and the forward list against the headcount plan, where the roles they apply to already live.
Questions people ask about 401 k eligibility rules
Can a plan exclude part-time employees?
Not indefinitely. Sustained part-time service over the period the long-term part-time rule names brings an employee in, so a full-time service condition no longer keeps consistently part-time people out for ever. Employers with large part-time populations should track who is approaching the threshold.
Why did somebody qualify in April and join in July?
Because satisfying the service condition and being admitted are different dates. Plans admit participants on entry dates, often quarterly. Communicate both dates at hire and most eligibility complaints disappear.
Where are our own eligibility conditions written?
In the plan document. They should also be on the plan record you keep, beside the headcount they apply to, because eligibility is the rule that turns a hire into a contribution cost on a specific date.
What does eligibility cost us?
Whatever your contribution formula is, from the date each person enters. That is why the forward list of who becomes eligible in the next quarter is a budgeting document and not an administrative curiosity.