Vesting determines how much of the employer-contributed portion of a participant's account they keep when they leave. Calculating it requires counting service, and counting service is where plan administration most often goes quietly wrong — because the method is set in the plan document and is easy to apply inconsistently.
Employee deferrals are always fully vested. Employer contributions — match, profit sharing, non-elective — may be subject to a vesting schedule, and vesting service is the measure that moves a participant along it.
The critical point: vesting service is not the same as eligibility service. They can use different methods and different computation periods within the same plan.
Under the hours method, a participant earns a year of vesting service by completing a specified number of hours — commonly 1,000 — during a defined 12-month computation period.
This raises a question plans must answer explicitly: what counts as an hour of service? It includes hours worked, but also hours for which the employee is paid without working — vacation, holiday, illness, and in some cases periods of paid leave. Plans that count only hours actually worked are typically under-counting.
For employees whose hours are not tracked — salaried exempt staff — plans commonly use equivalencies, crediting a set number of hours per day, week or month worked.
Under the elapsed time method, service is measured by the period between the date employment begins and the date it ends, regardless of hours worked. No hour counting at all.
Elapsed time is simpler to administer and can be more generous to part-time employees, who might never reach 1,000 hours but accrue service anyway. Which method applies is a plan design decision recorded in the document.
Under the hours method, the plan must define the 12-month period over which hours are counted. Common choices are the plan year, or the employment year measured from the hire anniversary. Plans sometimes use the employment year for the first period and switch to the plan year afterward — which creates an overlap that is perfectly permissible and frequently mishandled.
Plans may exclude certain service, but many categories must be included. Service before a plan was established, service with a predecessor employer in some circumstances, and qualified military service under USERRA all commonly count. Plans that were amended, merged or acquired carry service history that is easy to lose in a system conversion — and system conversions are where the largest vesting errors originate.
A break in service occurs when a participant fails to complete the required hours in a computation period. The rules governing whether prior service is preserved, suspended or forfeited are technical, and include protections for maternity and paternity absences that prevent certain leaves from creating a break.
Rehires are where this bites. A returning employee's prior vesting service frequently must be restored, and plans that treat every rehire as a new hire are creating a documented failure.
Vesting errors are operational failures. They understate or overstate what participants are entitled to, and they surface at distribution — often years after the error, when correcting it means locating former employees. Under-vesting a terminated participant means an underpayment that must be corrected with earnings; over-vesting means an overpayment that is frequently unrecoverable.
Participants routinely misunderstand vesting, and the misunderstanding surfaces at termination when it is least welcome.
Statements should show vested percentage clearly, and the plan's summary description should explain the schedule in plain terms. Where an employee is approaching a vesting milestone, they are entitled to understand that from their own records rather than discovering it afterward.
Employers should be careful not to give the impression that vesting can be accelerated or negotiated. It is determined by the plan document and applied uniformly.
Service records degrade quietly. Payroll systems change, employees transfer between entities, and rehires are processed inconsistently. None of this is visible until a distribution is calculated.
An annual reconciliation between payroll hours and recordkeeper service data catches these while they are still correctable, and it is considerably cheaper than locating former employees years later to correct an underpayment.
No. Elective deferrals are always immediately and fully vested.
Yes, and many do — which is precisely why the document must be read rather than assumed.
They are applied as the plan document directs. See handling forfeitures under a 401(k) plan.
For plan administration generally, see our retirement plan administration training.
Recommended Online Training Courses
1-770-410-1219
support@HRTrainingCenter.com
770-410-1219
