Hiring guideChecked against federal I-9, benefits and retirement rules, 15 September 2026

Rehire Policy: Bringing Back Former Employees

A rehire policy is the written rule that decides whether a former employee can come back, who makes that call, and what they keep when they do. Most frontline employers do not have one — they have an unwritten rule in one manager’s head, and that is the version that becomes a discrimination problem, because a bar applied from memory gets applied differently to different people. The document is short: eligibility categories, a named decision-maker, a waiting period if you want one, and a written answer to what carries over. Two federal rules do real work in it. You may rely on a former employee’s existing Form I-9 if you rehire them within three years of the date it was first completed, and for health coverage a returning employee counts as a new hire only after at least 13 consecutive weeks with no hours of service. The rest — seniority, paid time off, pay, anniversary date — is yours to set, provided you set it once.

Why the unwritten rule is the expensive one

Rehiring is one of the cheapest sources of qualified labor a frontline employer has: no sourcing cost, shorter training, no guessing about the hardest thing to predict in a hire, which is whether they turn up.

Almost nobody writes it down. Ask a plant supervisor who is eligible for rehire and you get a confident answer with no document behind it. The GM knows who walked out mid-shift in 2023; the GM leaves, and so does the rule.

An unwritten bar is not a bar, it is a habit, and habits do not apply themselves evenly. Two people quit the same way in the same month; one gets a call when a shift opens because somebody liked him. Rehiring is hiring, so the EEOC’s prohibited practices apply to it, retaliation included — and the rehire flag is where retaliation surfaces.

What a rehire policy contains

One page, five parts.

1. Eligibility categories

Sort separations into buckets and state the default for each. The categories are what make two similar cases get the same answer.

2. One decision-maker, named by title

Not “management.” A title. Whoever holds it can approve an exception, written on the same form as the original designation.

3. A waiting period, if you want one

No legal minimum or maximum exists. Ninety days and six months are the common choices, and both are signalling — they exist so walking out has a visible cost. Name who can waive the wait, because eventually you will want to.

4. How the designation gets recorded

At separation, in the file, with the reason and the name of someone who was there. A designation made when someone reapplies three years later is a decision dressed up as a record. What carries over — seniority, paid time off, benefits, retirement service, anniversary date — is the fifth part, and the rest of this page is about it.

“Not eligible for rehire” and how to make it hold up

The designation is an internal note in your own file — no government list, no database, nothing another employer can look up. Its only power is over what you do next.

Tie it to conduct you recorded at the time. A bar you can defend points at an event with a date and a document — the write-up, the incident report, the failed test. A bar you cannot defend points at an adjective, and “attitude” fails for the same reason vague hiring criteria do.

Apply it the same way to everyone. Pull everyone flagged not eligible in the last three years and read the reasons side by side. If you cannot tell why one is flagged and a comparable person is not, nobody else can.

Put a review date on it. A blanket permanent bar, applied inconsistently, is the hardest version to defend, and there is a records problem under it. 29 CFR 1602.14 requires personnel records to be kept one year from the date the record was made or the personnel action was taken, whichever is later. That is a floor, not a ceiling — but a flag you mean to enforce forever will outlive the file behind it.

Keep the supporting record as long as you mean to enforce the bar, and put a horizon on anything short of misconduct. Keep the reason internal: close the loop with a normal rejection message, and read our note on giving references before supervisors improvise.

What carries over on a rehire, and what does not

A returning employee asks this in the first five minutes, usually as “do I keep my vacation?” Some of it is yours to decide; some is not. Unemployment and final pay from the original separation are out of scope here: both are state law, and final pay belongs to the separation rather than the rehire.

Seniority, PTO and pay: nothing federal, everything policy

These three are where employers improvise, and improvising creates the inconsistency. Use one break threshold for all three — under X days, prior accrual rate and service date restored; over X days, new-hire treatment — and put the answer in the written offer.

Health coverage: the 13-week line

Under the employer shared responsibility rules at 26 CFR 54.4980H-3, an applicable large employer may treat a returning employee as a new employee only if the person had no hour of service for at least 13 consecutive weeks immediately before coming back — 26 weeks for educational organizations. Below that they are a continuing employee, and the waiting period cannot be run again.

For shorter gaps the same regulation offers an optional alternative, confusingly named the rule of parity: the employer may pick a period of at least four consecutive weeks with no hours that exceeds the employee’s immediately preceding period of employment, and treat a break that long as a termination and rehire. Separately, 29 CFR 2590.715-2708 bars any group health plan waiting period longer than 90 days once someone is otherwise eligible to enroll. Below the large-employer threshold that 13-week rule is not yours to apply, but your plan and carrier still set eligibility.

Retirement plan service: real rules, then your plan document

This is where employers most often say something confident and wrong. The unit of measurement is the 1-year break in service, which 26 U.S.C. 411(a)(6)(A) defines as a 12-month period designated by the plan in which the participant has not completed more than 500 hours of service. A part-timer can incur one without ever leaving.

• Back without a 1-year break. Under 26 CFR 1.410(a)-4(b)(1), someone who had already met the plan’s minimum age and service requirements and returns without incurring a 1-year break must commence participation immediately on return.
• Back after a 1-year break. 26 U.S.C. 410(a)(5)(C) lets a plan disregard pre-break service for eligibility until the employee completes a year of service after returning. May, not must.
• The rule of parity — the retirement-plan one. For a participant with no vested right to an employer-derived benefit, a plan may disregard the service before a run of consecutive 1-year breaks if that run equals or exceeds the greater of five, or the total years of service before it (26 U.S.C. 410(a)(5)(D) and 411(a)(6)(D)). It reaches only someone with no vesting.

Each is a minimum standard — what a plan may disregard, not what it must. Plenty of plans are more generous, so the answer is in your plan document rather than the statute: get it from the administrator in writing before the offer. Note the collision, too — rule of parity means something entirely different in the health-coverage rules above.

Form I-9: the three-year rule

8 CFR 274a.2(c) says that when you hire someone you previously employed and already completed a Form I-9 for, you may inspect the existing form instead of completing a new one. If it relates to that individual and they are still eligible to work, it is sufficient provided the person is hired within three years of the date the form was first executed, and provided you update it to reflect the date of rehire. If authorization has expired, you must reverify.

It is a permission, not an obligation, and the failure that matters is the opposite one: leaning on a form that is four years old. The three years run from when the form was completed, not from when the person left. Record the rehire date in the current form’s reverification and rehire section, and keep the form three years from first execution or one year after employment ends, whichever is later.

When not to rehire

• Gross misconduct. Violence, theft, a deliberate safety violation, falsified records, a failed test in a regulated role. Not a judgment call, and not delegated to whoever is short-handed.
• The reason they left is still true. They left over the weekend rotation and the rotation has not changed. You are buying the same resignation on a delay and paying the early-departure cost twice.
• You are hiring out of fatigue. If the honest sentence is “they were a problem but we are desperate,” the problem is the staffing plan.
• The job moved on. The license lapsed, the equipment changed. That is a requirement question, answered the way you would answer it for a stranger.

The most useful question in a rehire interview is what is different now — and a manager who cannot name one specific difference is remembering the good months. You want circumstances rather than enthusiasm. “My kid started school so the early shift works” is a reason; “I appreciate this place now” does not survive February.

The rehire conversation starts at the exit

Every boomerang hire begins as a resignation somebody handled well, and the work happens in the last week rather than the first: record the designation while the facts are fresh, ask permission to contact them, take a personal number because the work email dies. And you cannot make a case to a boomerang unless you know what they left over, which is what our exit interview questions are for.

When they come back, treat them as a candidate. Knowing someone three years ago is a data point, not a decision — check the employer in between using the same order of operations, and run the conditional offer sequence unchanged if the role carries a background check. Then onboard them: the commonest way a rehire fails is assuming they remember. A short version of your onboarding sequence is enough.

Recruiting former employees back

Recruiting former employees is outreach rather than advertising, and it only works if the groundwork in the previous section was done: a designation recorded at exit, permission to get in touch, and a personal phone number or email that outlived the work account.

• Work the eligible list in policy order. Laid-off and seasonal staff first, as the eligibility table above says, then resignations in good standing. Anyone flagged not eligible stays off the list, and nobody is added because a manager happens to like them.
• Get in touch when there is a specific opening. “We would love to have you back someday” gets a polite reply. A named shift, a start date and the current pay rate get a decision.
• Answer the carry-over question in the first message. Say what returns and what resets — service date, PTO accrual, the benefits waiting period — using the break threshold in your policy, before they have to ask.
• Name what changed. If they left over the schedule, the pay or a supervisor, say what is different now. If nothing is, reread the section on when not to rehire.

Former employees also see your public job ads. A line such as “Former team members are welcome to reapply” takes up almost no room in the copy and tells them the door is open without anyone having to make the first call.

What a rehire is worth against what an applicant costs

Put a number on the alternative. In Boostpoint’s 2026 Social Job Advertising Benchmark — 891 Boostpoint-managed Meta campaigns, 1,334 campaign-months — the median cost per applicant was $13.88 inclusive of campaign management; a CDL driver applicant ran a median $26.86, a registered nurse $19.08. A rehire skips that line and most of the screening behind it. But the honest argument is not cheaper advertising: the expensive part of frontline hiring is the people who do not last, and with a former employee you already know the thing the interview is trying to guess. Rehiring is a cheaper source of candidates, not a cheaper source of retention.