To convert a seasonal employee to a permanent one, decide whether the role genuinely needs year-round cover, make a written offer that states the new status, hours, pay and benefits eligibility, and update your payroll and benefits records from a clear effective date. Because the person already works for you, you usually do not start the Form I-9 from scratch. The harder part is choosing well: the best seasonal performers are not always the right permanent hires, and a conversion made in a rush in late December often turns into a layoff in March.
This guide walks through the decision and the paperwork in the order an employer actually meets them, with the federal rules that apply and the places where state law may add more.
Start With the Role, Not the Person
The holiday rush makes almost everyone look essential. Before anyone gets an offer, write down what permanent work exists after the season ends. Useful questions:
- Which tasks in January, February and March are currently going undone or being covered by overtime?
- Is the need full-time, part-time or a predictable recurring peak that another seasonal hire could cover next year?
- Did the season reveal a gap you would have hired for anyway, such as stock control, customer service or a shift lead?
- Can the budget carry the role through the slowest quarter, not just the next month?
If you cannot describe a permanent job in a paragraph, you probably do not have one yet. Drafting that paragraph also gives you the start of a proper job description you can share with internal candidates.
Evaluate Seasonal Staff Against the Permanent Job
Seasonal work rewards speed, stamina and a good attitude under pressure. Permanent roles usually add judgment, cross-training and consistency on quiet days. Rate your candidates against the permanent job description, not against how they handled Black Friday.
Practical evidence to gather before you decide:
- Attendance and reliability across the whole season, not just the first two weeks.
- Feedback from the person who supervised them day to day, collected in writing so it can be compared across candidates.
- Range of tasks the person handled or volunteered for.
- Their own interest. Some seasonal staff are students, retirees or people with another job. Ask before assuming they want permanent work.
If a supervisor role is in play, it helps to compare candidates against a neutral outline of the job. The occupational profile of what a retail floor supervisor typically does is a useful checklist when you are deciding whether a strong seasonal associate is ready to lead others.
Be fair and consistent about who is considered
Offer the opportunity through a consistent process. Telling all seasonal staff that permanent roles may open, and how to express interest, protects you from the perception that conversions went to favourites. It also surfaces good people who would not have asked.
If the Worker Came Through a Staffing Agency
A seasonal worker supplied by an agency is usually the agency’s employee, not yours. Converting them is a different transaction: read your agreement for a conversion fee, a minimum number of hours before you can hire without a fee, or a notice requirement. Our explainer on what employers actually pay staffing agencies covers the usual contract terms. Ignoring a conversion clause is one of the most common, and most avoidable, disputes between agencies and clients.
Once the worker joins your payroll, you are the employer for every purpose, including the new-hire paperwork the agency previously handled.
The Paperwork for a Worker Already on Your Payroll
Form I-9
USCIS lists situations it treats as continuing employment, where no new Form I-9 is needed. They include an employee who is promoted, demoted or gets a pay raise, and an employee who “is engaged in seasonal employment.” A seasonal employee moving to permanent status without a break in employment is generally a change of terms, not a new hire. If there was a real separation in between, for example the season ended, the person was let go and you are rehiring weeks later, the rehire rules apply instead. See our guide to rehiring seasonal employees and the Form I-9 for that scenario.
Offer letter or change-of-status letter
Put the conversion in writing. At minimum, state:
- The effective date of the change
- Job title and who the person reports to
- Full-time or part-time status and expected weekly hours
- Pay rate or salary, and whether the role is exempt or non-exempt from overtime
- When benefits eligibility begins and whether seasonal service counts toward any waiting period
- Paid time off accrual from the effective date
Be specific about service credit. If your plan documents count service from the original seasonal start date, say so. If they do not, say that too, so the employee is not surprised later.
Exempt or non-exempt status
Most seasonal roles are hourly and non-exempt. If the permanent role is salaried, check that it actually meets an exemption under the Fair Labor Standards Act. If it does not, the person remains entitled to overtime for hours over 40 in a workweek at one and one-half times the regular rate, as the Department of Labor’s overtime page explains. Paying someone a salary does not on its own make them exempt.
Benefits and the Affordable Care Act
For employers large enough to be covered by the ACA employer rules, the conversion can change how an employee is counted. The IRS defines a full-time employee for these purposes as one employed on average at least 30 hours of service per week, or 130 hours of service per month. An employer is an applicable large employer for a year if it had at least 50 full-time employees, including full-time equivalents, on average during the prior year. The IRS also has a seasonal worker exception: if the workforce exceeds 50 full-time equivalents for 120 days or fewer in a calendar year and the extra workers during that period are seasonal, the employer is not treated as exceeding 50.
Two practical consequences. First, keeping on several holiday workers year-round can move a business close to the 50 threshold for the next year’s count. Second, if you are already an applicable large employer, a newly permanent full-time employee needs to be offered coverage under your normal rules. Ask your benefits broker or payroll provider to check before you make several conversions at once.
A Simple Conversion Timeline
| When | Step |
|---|---|
| Mid-season | Confirm which permanent roles exist and the budget for them. Tell seasonal staff how to express interest. |
| Two to three weeks before season end | Collect supervisor feedback, review attendance, hold short conversations with interested staff. |
| Before the last seasonal shift | Make written offers with an effective date. Tell those not selected, with thanks and a note about next season. |
| Effective date | Update payroll status, exempt/non-exempt classification, benefits enrolment and PTO accrual. |
| 30 to 90 days after | Formal check-in on the permanent role, including any training promised in the offer. |
Handle the People You Do Not Convert Well
Most seasonal staff will not be kept on. How you end the season affects whether good people return next year. Tell them in person or by phone before the last shift, thank them specifically, and say whether you would like them back. Pay final wages according to your state’s final-pay rules, which vary. Our guide on managing seasonal workers has more on planning the post-season transition.
Common Mistakes
- Converting everyone who asked. Headcount that suits December rarely suits February.
- Verbal promises in the last week of the season. “We’ll keep you on” said at a busy till is hard to walk back and easy to misremember.
- Forgetting the agency contract. Conversion clauses are enforceable terms you agreed to.
- Leaving the classification unchanged. A new salaried title with no exemption review creates overtime exposure.
- Skipping onboarding. A permanent role deserves a fresh orientation to expectations, even for someone who knows the building. Walk through the role, the reporting line and the first 90 days as you would for an outside hire.
Frequently Asked Questions
Do I need a new Form I-9 when a seasonal employee becomes permanent?
Generally not, if there is no break in employment. USCIS treats a promotion, a pay change and seasonal employment as continuing employment. If the person was separated and you are rehiring later, use the rehire rules, which allow Supplement B within three years of the original form.
Is there a federal rule that requires me to offer seasonal staff permanent jobs?
No federal rule requires it. Some other countries have formal conversion rights for casual workers, so if you employ people outside the US, check local law.
Does seasonal service count toward a benefits waiting period?
That depends on your plan documents and, for health coverage, on how your plan measures eligibility. State it clearly in the offer letter, and check with your plan administrator.
Can I convert a seasonal worker I hired through a staffing agency?
Usually yes, but your agreement with the agency will typically set a conversion fee or a period after which no fee applies. Read the contract and notify the agency before making an offer.
When is the best time to make the offer?
Before the season ends. Good seasonal workers start looking for their next job in the final weeks, and a clear written offer with an effective date keeps them from accepting something else.