Boomerang Employees: What They Are, How to Rehire Them, and the Reonboarding Workflow
What are boomerang employees? Pros, cons, compliance checklist for rehires, 7-day reonboarding workflow, and interview questions for returning employees.
A boomerang employee is someone who leaves your company and later comes back. Boomerang hiring was long assumed to be rare. Now it is one of the most common hiring trends in the US. According to Harvard Business Review (March 2023), boomerang employees made up more than a quarter of new hires at the large employers its authors studied between 2019 and 2022 (HBR).
My advice to any founder weighing a rehire: a good former employee is the warmest candidate you will ever have, and the return is still a real hiring decision, not a favor. For a small business, where every hire lands harder than it would at scale, a returning employee who already knows your systems, culture, and clients can be worth more than any new candidate.
The same HBR article cites an international survey in which nearly 20% of workers who quit their jobs during the pandemic had since returned to their old employers. But rehiring a former employee is not the same as hiring a new one. The compliance requirements differ (I-9 reverification rules, benefits re-enrollment, PTO accrual decisions).
The onboarding process should be shorter but not skipped. And the conversation is different: you need to understand why they left, why they want to return, and whether the conditions that caused the departure have actually changed. This guide covers what boomerang employees are, the real advantages and risks, the compliance checklist most employers miss, and a 7-day reonboarding workflow.
What Is a Boomerang Employee?
The concept is not new, but the scale is. The Great Resignation of 2021 and 2022 created a large pool of recent leavers, many of whom discovered that their new roles did not meet expectations. The survey figure HBR cites, nearly one in five pandemic-era quitters back with a former employer, is what that discovery looks like in aggregate.
Two other forces pushed in the same direction. Remote work widened the talent pool and made it possible to return without relocating. And hiring costs kept climbing, which makes a candidate who needs less recruiting effort and less ramp-up time look better every year.
For a small business, boomerang employees carry outsized value because each person holds a larger share of the institutional knowledge. Losing someone who knows your clients, your processes, and your culture is expensive.
Many departures are preventable, according to the people who leave: in a Gallup survey of voluntary leavers (November 2023), 42% say their manager or organization could have done something to prevent them from leaving (Gallup).
The Gallup figure is also the argument for keeping alumni relationships alive. A departure you could have prevented is a departure you can often reverse later, provided the exit was handled well enough that the person still takes your call.
Why Employees Come Back
| Trigger | What It Looks Like | How Common |
|---|---|---|
| The new job did not meet expectations | Better title or pay, but worse culture, management, or work-life balance | The most common trigger in practice |
| Leadership or management changed | The manager they left because of is now gone | Common at small companies where one person drives culture |
| They gained skills and want to apply them | Left as a junior, returning as a senior with new expertise | Common: HBR found boomerangs more likely to be managers than non-managers |
| Life circumstances changed | Relocated for a partner, had a child, dealt with a family situation, now ready to return | Moderate |
| Compensation caught up | Your pay was not competitive when they left; now it is (or you have budget for a raise) | Moderate |
| Unfinished business | Left during a project or transition they cared about; want to see it through | Less common but produces the most engaged returns |
Understanding the trigger matters because it determines whether the return will stick. If they left because of a manager who is still there, they will leave again. If they left because your pay was not competitive and you are offering the same rate, the same problem will surface in 12 months. The exit interview (you did conduct one, right?) is the most valuable document in the rehire decision.
How to Build a Boomerang Hiring Pipeline
Boomerang hiring works best when the return conversation starts long before you have a vacancy. Keep a short list of former employees you would take back, add each name on the day that person leaves, and give one person the job of checking in twice a year. A return usually begins with an ordinary message, not a job posting.
The outreach itself is unremarkable. Send a note when the company ships something they worked on, invite them to a team event, ask honestly how the new role is going. Say nothing about openings. Then, when a role does open, that list is the first place you look, and the message reads as an offer rather than a cold pitch.
Two habits keep the list worth having. Record the rehire eligibility decision at offboarding, covered later in this guide, so nobody has to reconstruct it under vacancy pressure. And keep the departure clean: final paycheck on time, property returned without friction, and an exit conversation that treats the person as someone you may work with again.
Advantages of Rehiring Boomerang Employees
| Advantage | Why It Matters for Small Businesses | Supporting Data |
|---|---|---|
| Lower recruiting cost | Boomerangs often come through direct outreach, not job boards or agencies. No sourcing, screening, or agency fees. | SHRM 2025 benchmarking puts the average cost per hire for nonexecutive roles at $5,475 in recruiting spend alone. |
| Faster time-to-productivity | They already know your tools, culture, and clients. The learning curve is weeks, not months. | The ramp a new hire has to climb is one a returning employee has already climbed once. |
| Known cultural fit | You have firsthand data on how they work, communicate, and handle pressure. No guessing. | Removes the biggest risk in hiring: culture mismatch discovered after onboarding. |
| Institutional knowledge recovery | At a 20-person company, one departure takes 5% of institutional knowledge. A return recovers it. | Especially valuable for client relationships and process knowledge. |
| Signal to current employees | Rehiring someone sends a message: this is a company worth coming back to. | Strengthens employer brand and referral pipeline. |
The Risks Nobody Talks About
| Risk | Why It Happens | How to Mitigate |
|---|---|---|
| Pay compression | A returning employee negotiates against the market they just came from, not the pay they left on, which pushes them past incumbents in the same role | Benchmark the role, not the person. Pay what the role is worth on the current market. |
| Retention is not automatic | Harvard Business Review calls the trend a major risk with respect to retention, because new hires may be increasingly liable to boomerang back to their previous employers | Ask what would cause them to leave again, and treat the answer as a condition to fix rather than small talk. |
| Team resentment | Employees who stayed may feel the boomerang is being rewarded for leaving | Address it directly with the team before the return. Acknowledge loyalty. |
| Returning to unchanged problems | If they left because of a broken process, toxic peer, or missing growth path, and nothing changed, they will leave again | Review the exit interview. Be honest about what changed and what did not. |
| Stale perspective | They may assume things work the way they did when they left. New processes, tools, and team norms may not register. | Full reonboarding, not a handshake and a laptop. Treat it as a structured first week. |
| Favoritism perception | Fast-tracking a boomerang through hiring while external candidates go through full process | Run the same interview process. Add boomerang-specific questions. Document the decision. |
The pay premium deserves specific attention, because a returning employee almost always asks for more than they left on. Whether that is justified depends on the math: if the cost of recruiting and training an external candidate exceeds the premium, the boomerang is still the cheaper hire.
The boomerang pay premium is not small. According to Harvard Business Review (2023), the boomerangs in its authors' analysis returned with an average raise of 25% over their salary at resignation, while employees who stayed with one employer averaged 4% over the same period.
Put real numbers on both sides before you argue about it. According to SHRM's 2025 benchmarking survey, the average cost per hire for nonexecutive roles was $5,475, and that figure is recruiting spend alone (SHRM). Gallup (2019) puts the cost of replacing one employee at one-half to two times the annual salary of the person who left, and calls that a conservative estimate (Gallup).
Against those two figures, a premium paid to somebody whose work you have already seen is often the smaller number. What it is not is free, which is why the internal equity question below has to be answered in the same budget cycle.
Setting Pay for a Returning Employee
"Benchmark the role, not the person" is the right instruction and a useless one on its own, because the returning employee is going to name a number and you need a method for answering it. Work the problem in this order: establish the current range for the role, place the candidate inside that range on the same criteria you would use for anyone else, and only then compare the result to what they are asking for.
A worked example. An operations coordinator left twenty months ago at $68,000. The current range for that role, based on the last time you benchmarked it, is $72,000 to $88,000, with a midpoint of $80,000. Two people currently sit in the role at $74,000 and $79,000, both with more continuous tenure. The returning candidate asks for $86,000, which is what they are earning now at the job they want to leave.
The number that matters is not $86,000 and it is not the old $68,000. It is where their assessed level places them in the band. If the twenty months away produced genuinely new capability, upper-middle of the band is defensible, which lands somewhere around $80,000 to $82,000. If they are the same person doing the same work, they belong where the incumbents are.
Paying $86,000 does not cost you $86,000. It costs you $86,000 plus whatever you spend correcting the two incumbents once the number leaks. And it will leak: in a growing number of states, pay range postings and pay transparency rules mean the band is not private in the first place.
Two cautions on process. First, do not let the candidate's current salary at another employer set the anchor. Several states and cities restrict what employers may ask about or rely on regarding salary history, and how those laws treat a rehire's own prior pay at your company varies by jurisdiction, so check your state rather than assuming your internal records are fair game.
The second caution is about budget: if you decide the premium is worth paying, treat the equity correction as part of the hiring decision and budget it in the same cycle. A boomerang hire that quietly compresses two loyal employees into leaving has not saved you a recruiting cost. It has moved it.
Interview Questions for Returning Employees
Do not skip the interview. A boomerang hire should go through a structured conversation, even if you know them well. The interview serves two purposes: vetting whether the return will work, and setting expectations that this is a fresh start, not a continuation of the old role.
| Question | What You Are Assessing |
|---|---|
| What specifically prompted you to consider coming back? | Whether the trigger is positive (pulled back by opportunity) or negative (pushed by a bad new job) |
| What did you learn or gain during your time away? | Whether they bring new skills, perspective, or just the same person who left |
| What do you expect to be different this time? | Whether their expectations are realistic given what has and has not changed |
| What would you have changed about your experience here before you left? | Whether the original pain points have been addressed |
| How do you feel about reporting to [current manager] and working with [current team]? | Whether there are unresolved interpersonal issues |
| Where do you see this role going in 12 to 24 months? | Whether they are looking for stability or another stepping stone |
| What would cause you to leave again? | The most valuable question: identifies the retention risks before they activate |
The last question is the most important. If their answer describes a condition that currently exists or is likely to recur ("if my manager micromanages," "if there is no path to promotion," "if pay does not keep up"), you have advance warning. Address it before extending the offer, not after they have accepted.
Compliance Checklist for Rehires
This is the section most boomerang employee articles skip. Rehiring a former employee triggers specific compliance requirements that differ from those for an ordinary new hire, and yes, state new hire reporting can apply to rehires too, depending on the length of the break.
| Item | Rule | Action Required |
|---|---|---|
| I-9 Employment Verification | If you rehire within 3 years of the date you completed the original Form I-9, you may complete a block on Supplement B instead. After 3 years, a new Form I-9 is required. | Read the date on the original form first. If you complete a new I-9, Section 1 is due by the first day of employment and Section 2 within 3 business days. |
| W-4 Tax Withholding | Prior W-4 is not valid for new employment period | Collect new W-4 before first payroll |
| State New Hire Reporting | Under federal law, a rehire who was separated for at least 60 consecutive days is reported to the state new hire directory as a new hire; some states also count shorter breaks | Report no later than 20 days after the rehire date; 9 states set a shorter deadline |
| Benefits Waiting Period | May apply again depending on your plan documents and break-in-service length | Review plan terms. Determine if prior service bridges the waiting period. |
| PTO Accrual | Policy-dependent: some companies bridge prior tenure, others reset to zero | Clarify in offer letter. Update HRIS accrual settings. |
| 401(k) / Retirement | ERISA rules may require crediting prior service for vesting. Check plan document. | Consult plan administrator. Update vesting schedule if required. |
| COBRA | Rehire is not itself a federal event that ends continuation coverage; a returning employee on COBRA moves to active coverage once eligible | Coordinate with the benefits administrator so COBRA ends when active coverage begins, with no gap during a waiting period. |
| Employee Handbook | Policies may have changed since departure. New acknowledgment required. | Send current handbook for e-signature before or on Day 1 |
The I-9 rule is easy to get wrong. Many employers assume a returning employee needs no verification at all. U.S. Citizenship and Immigration Services (USCIS) is specific: if you rehire within three years of the date you completed the previous Form I-9, you may complete a block on Supplement B. Employees rehired after that three-year mark must complete a new Form I-9 (USCIS Handbook for Employers M-274).
Supplement B is the current name for what used to be Section 3, so guidance written before the 2023 edition of the form uses the old label. If the original form is missing or you cannot vouch for it, the three-year question is moot and you complete a new one.
Nick Anisimov, FirstHR founderThe I-9 and E-Verify Rules, Worked Through
The three-year window trips people up because they measure it from the wrong date. It runs from the date the original Form I-9 was completed, not from the date the employee left.
Take an I-9 completed on March 3, 2021 for someone who resigned in January 2023 and asks to return in January 2026. That return is outside the window: the employee was gone for three years, but the form is almost five years old, and the window closed in March 2024. Pull the original form and look at the date on it before you decide anything.
| Situation | What You May Do | What to Watch |
|---|---|---|
| Rehired within 3 years of the original I-9, form on file and correct | You may update the existing form instead of starting over. On the current edition this is Supplement B, Reverification and Rehire, which replaced the old Section 3. | Using the existing form is optional. Completing a fresh I-9 on the current edition is always acceptable and is often simpler than reconciling an old form. |
| Rehired within 3 years, but the original form is missing, incomplete, or you are unsure | Complete a new I-9. | Do not reconstruct or backdate a missing form. Complete a current one and note the date you actually completed it. |
| Rehired more than 3 years after the original I-9 was completed | Complete a new I-9. No choice here. | Standard deadlines apply: Section 1 no later than the first day of employment, Section 2 within three business days of the start date. |
| Employment authorization document expired during the gap | Reverify with unexpired documentation the employee chooses to present. | Do not reverify US citizens or noncitizen nationals, and do not reverify an expired Permanent Resident Card. Reverification applies to time-limited authorization. |
| You participate in E-Verify | A new I-9 means a new E-Verify case. A Supplement B update without a new case is open to you only if you created a case from the original I-9 and it came back employment authorized. | With no earlier case, or one that did not end in employment authorized, complete a new I-9 and create a case no later than the third business day after the employee starts work for pay. |
Two record-keeping points follow from this. The old I-9 from the first period of employment is kept under the ordinary rule, three years after the date of hire or one year after employment ends, whichever is later, and once the person is back on payroll the clock runs off the current employment.
The second point is about restraint: an I-9 is not a document you re-collect for comfort. Completing a new form or reverifying someone you had no basis to reverify creates its own exposure, so the decision above should come from the dates on the paperwork rather than from a preference for having something fresh in the file.
Dwight SchruteSales3 people
Darryl PhilbinWarehouse1 person
Kelly KapoorCustomer Service1 personWhat Resets and What Carries Over
"Do they keep their tenure?" is the question boomerangs ask first, and the honest answer is that it depends on which benefit you are asking about. Some of it is your choice, some of it is your plan document, and some of it is federal law that does not care what you would prefer.
| Benefit | What Governs It | How It Usually Lands |
|---|---|---|
| Paid time off | Entirely your policy, plus state law on payout at separation | In states that treat accrued vacation as earned wages, the balance was paid out when they left and does not reappear. Whether you restore the higher accrual rate for prior service is a policy choice. Say which one in the offer letter. |
| Health plan waiting period | Your plan document, capped by the ACA limit of 90 days | For applicable large employers, under either measurement method, an employee returning after a break of at least 13 consecutive weeks with no hours (26 for educational organizations) may be treated as a new employee; a shorter break generally means they resume their prior status. A separate parity rule can allow new-employee treatment after a break of at least four weeks that exceeds the length of the prior employment period. |
| 401(k) eligibility and vesting | The plan document, within ERISA limits | Concepts your recordkeeper will use: a one-year break in service is a 12-month period with 500 or fewer hours; a returning employee who had already met the eligibility rules re-enters on rehire when there was no one-year break, while after a break the plan may hold off counting earlier service until the employee completes a year of service after return; the rule of parity can let a plan disregard prior service for someone who was zero percent vested after enough consecutive breaks. Ask for the answer in writing before the return date. |
| FMLA eligibility | Federal law, for covered employers | The 12 months of employment need not be consecutive, so prior service generally counts, but employment before a break of seven years or more usually does not have to be counted. The separate 1,250-hours requirement looks only at the 12 months immediately before the leave, so a recent rehire will not qualify until they have worked those hours. |
| Seniority and internal tenure | Your policy | Service awards, PTO tiers, sabbatical eligibility, and internal start dates are yours to set. The only wrong answer is deciding case by case. |
Each of those rows rests on a rule you can read for yourself. The health plan break-in-service tests for applicable large employers (the Affordable Care Act's term for larger employers) sit in the shared responsibility regulation, and the seven-year rule for counting prior service toward Family and Medical Leave Act (FMLA) eligibility is in the FMLA eligibility regulation.
The retirement plan side comes from the Employee Retirement Income Security Act (ERISA), and ERISA's participation section is where the break-in-service arithmetic and the rule of parity live. Your recordkeeper applies the plan document on top of it, which is why that answer has to arrive in writing rather than over the phone.
Write the bridging rule down once, apply it to every rehire, and put the specific numbers in the offer letter: the tenure date you are using, the PTO accrual rate that applies, the benefits effective date, and the 401(k) entry date. Boomerangs are the population most likely to assume continuity, and an unwritten assumption about the accrual rate is the kind of thing that produces a bad conversation in month three.
The 7-Day Reonboarding Workflow
Reonboarding is not the same as onboarding, but it is not nothing. The mistake most companies make with boomerang employees is treating them like they never left. Meanwhile the company has changed: new people, new processes, new tools, new priorities. A structured first week keeps the boomerang from operating on outdated assumptions.
This workflow is shorter than standard new-hire onboarding because the boomerang already has baseline company knowledge. Standard onboarding, according to Gallup, can last anywhere from the first 30 days to beyond the first year. The focus here is narrower: compliance paperwork, access restoration, policy updates, and team reintegration.
A platform like FirstHR handles the operational layer: e-signature for rehire documents, HRIS profile reactivation, task workflows for the reonboarding checklist, and training module assignments for updated policies.
When NOT to Rehire a Former Employee
| Red Flag | Why It Disqualifies |
|---|---|
| They were terminated for cause (performance, misconduct) | The original termination was a decision. Unless documented circumstances have fundamentally changed, the same issues will recur. |
| Their exit interview cited problems that still exist | If they left because of a specific manager, process, or cultural issue, and that issue has not been resolved, rehiring creates a repeat departure. |
| The team does not want them back | If current employees have strong objections based on past working relationships, forcing the return damages team cohesion. |
| They are returning only because their new job failed | Being pushed back by a bad alternative is different from being pulled back by genuine interest. The former has weaker retention prospects. |
| You are filling the same role at the same pay that drove them away | If compensation was the reason they left and you are offering the same package, you are buying 12 months before the same conversation. |
The exit interview is the decision tool. If you conducted a thorough exit interview when they left, it tells you exactly what drove the departure. Match that against current conditions. If the gap is closed, the rehire makes sense. If the gap is unchanged, the rehire is a temporary fix.
Writing a Rehire Eligibility Policy
The decision about whether someone can come back is much easier to make on the day they leave than on the day they ask. At departure you have the performance record, the manager who worked with them, and no vacancy pressure. Eighteen months later you have a role to fill, a warm body who already knows the job, and a strong incentive to remember the departure charitably. So make the call at offboarding and store it.
Mechanically this is one field on the termination record with three possible values and a required one-line reason. Eligible for rehire means the person can come back tomorrow. Eligible with review means there is a specific condition worth a conversation, such as a performance plan that was open at departure or a role that turned out to be a poor fit. Not eligible means something in the documented record disqualifies them.
The manager proposes the value, whoever owns HR approves it, and the reason field is a fact, not a feeling: "terminated for attendance after final written warning, 3/14" rather than "difficult."
The exposure in this policy is inconsistency rather than strictness. A rule that says nobody terminated for cause is eligible is defensible. A rule applied to some people and waived for others starts to look like a pattern, and if the pattern happens to track a protected characteristic, the waiver you granted to a favored former employee becomes the comparator (the better-treated person a claimant points to) in someone else's claim. Apply the flag the same way every time, or change the policy.
Two related items. If a departure was settled with a severance or separation agreement, read it before you talk to the person, because no-rehire language is common in those agreements. California bars a settlement of an employment dispute from restricting future employment with the employer for the person who settled, subject to narrow exceptions (California Code of Civil Procedure 1002.5).
The second item is the eligibility flag itself, which stays internal. It belongs in the employment record for your own decision-making, not in a reference you give to another employer, where the safe practice remains confirming dates, title, and, where permitted, whether the person is eligible for rehire, without a narrative.
Frequently Asked Questions
What is a boomerang employee?
A boomerang employee is someone who leaves a company and later returns to work there again. The departure is usually voluntary (resignation, career change, relocation); someone recalled after a layoff is more often described as a rehire than as a boomerang. The defining characteristic is the return: the employee comes back to the same employer after a gap, whether that gap is 6 months or 6 years. The term comes from the boomerang that returns to the person who threw it.
How common are boomerang employees?
Common enough that they are no longer an exception. A Harvard Business Review article published in March 2023 drew on about three million employee records at more than 120 large organizations from 2019 to 2022, and the authors found that 28% of new hires were boomerangs who had resigned from the same employer within the previous 36 months. The share varied by industry: 33% in retail, 25% in manufacturing, and 14% in tech. A survey the article cites adds that close to one in five people who resigned during the pandemic later went back to the employer they had left. The Great Resignation of 2021 and 2022 added to that pool of leavers, and in most cases the returners felt the new employer had not lived up to the promises or expectations it set when it hired them.
Are boomerang employees a good idea?
Usually, provided you vet the return rather than waving it through. What you gain is real: recruiting spend you do not have to make, a shorter ramp because they already know your tools and clients, and firsthand evidence of how the person works under pressure. What you take on is equally real. Harvard Business Review also flags the other side of the trend: the people you hire may be increasingly likely to boomerang back to the employers they came from. Add the pay question, since a returning employee negotiates against the market they just came from, and the risk that the condition which drove the original departure is still sitting there unchanged.
Do boomerang employees get paid more?
Usually, yes. In the Harvard Business Review analysis of large employers, boomerangs came back with an average raise of 25% over their pay at resignation, while employees who stayed with one employer averaged 4% over the same period. The pressure is structural: the person has picked up market experience, you want them back and they know it, and the going rate for the position may have risen while they were away. To keep it under control, price the position rather than the individual. Set the current range first, slot the candidate into it using the same yardstick as any other applicant, and only then set the result beside their ask. If the premium still looks worth paying, put the cost of adjusting what colleagues earn into the same budget cycle, since a pay gap between teammates rarely stays quiet.
Do boomerang employees keep their tenure or seniority?
Some of it, depending on the benefit and the length of the break. Seniority, internal tenure, and PTO accrual tiers are company policy, so some employers bridge prior service while others start fresh. A group health plan may treat a rehire as newly eligible and apply its waiting period again, within the federal 90-day limit. Retirement plan vesting runs the other way: federal law generally requires the plan to count earlier years of service, with narrow exceptions for breaks in service. Earlier employment also generally counts toward the 12-month test for Family and Medical Leave Act (FMLA) leave unless the break lasted seven years or more. Your rehire policy should specify how prior service is treated for each benefit category.
Do you need a new I-9 for a boomerang employee?
It depends on a single date: when you completed the earlier Form I-9, not when the employee left. If the rehire falls within three years of that date, U.S. Citizenship and Immigration Services (USCIS) lets you record the rehire in the Supplement B block of the existing form instead of starting over. Once more than three years have passed, you must complete a new Form I-9, with no discretion. Even inside the window you can skip the shortcut: filling out a fresh form on the current edition is always acceptable, and it can be easier than updating an older version. A new form carries the usual deadlines. The employee completes Section 1 no later than the first day of work for pay, and you finish Section 2 within three business days of that start date.
What is the difference between a boomerang employee and a rehire?
A rehire is anyone the company hires again after a previous period of employment. A boomerang employee is a specific type of rehire: someone who voluntarily left (typically for another opportunity) and then chose to return. Not all rehires are boomerangs. An employee laid off during a downturn and recalled when conditions improve is a rehire but not typically called a boomerang. The boomerang framing implies the employee had options and chose to come back.
Should you rehire a former employee who quit?
Consider it seriously, but do not treat it as automatic. Start with your exit interview notes, if you have them, and work out why the person left and whether that reason still holds. Then look at what they did while away: what they learned, and what their interim employer says about them. Interview them the way you would any candidate, adding questions about why they want to return and what they expect to be different. If the problem that drove them out is still there, rehiring them solves nothing.
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