Probation to permanent: the US process
Reviewed by Mellow Editorial Team, HR & payroll content team
Converting an employee from probationary to permanent status in the US is largely an internal process — there is no federal filing or legal formality required to make the change. What matters is that your documentation, pay, and benefits are updated consistently and that the transition is clearly communicated in writing.
Understand what "probationary" actually means in US law
US employment is generally at-will, which means either party can end the employment relationship at any time, for any lawful reason, regardless of whether a probationary period is in place. A probationary period does not give you greater legal authority to terminate someone — you already have that authority in most states.
What a probationary period does do is set expectations. It signals to the new hire that their performance is being formally evaluated, and it gives managers a structured window to decide whether the role is a good fit. It can also affect when certain benefits kick in, which is worth spelling out clearly in your offer letter and employee handbook.
Be careful with language. Calling someone a "permanent" employee can, in some jurisdictions, be interpreted as an implied contract that limits your at-will rights. Prefer language like "regular full-time employee" or "benefits-eligible employee" instead.
Set a clear end date before day one
The cleanest probationary periods have a fixed length — commonly 30, 60, or 90 days — stated explicitly in the offer letter. Define:
- The exact duration
- What criteria the employee will be evaluated against
- Whether any benefits (health insurance, 401(k) eligibility, PTO accrual) are withheld until the period ends
- What happens if the review is delayed
If your handbook says the probationary period is 90 days and you forget to conduct the review until day 100, you have created ambiguity about the employee's status. Build a calendar reminder and treat the review date as a hard deadline.
Conduct the transition review
At the end of the probationary period, hold a formal performance review meeting. Document it. The written record should cover:
- A summary of performance against the criteria set at hire
- Any areas for improvement and how they were addressed
- The manager's recommendation (transition to regular status, extend the probation, or separate)
- The employee's acknowledgment of the discussion
If you decide to extend the probationary period, put the new end date and the specific reasons in writing. Repeated or indefinite extensions can expose you to claims that you are using the probationary label to deny benefits rather than genuinely evaluate performance.
If you decide to separate the employee, follow your standard termination procedure. At-will status applies, but you still need to comply with applicable state and local notice requirements and pay out any accrued wages on the schedule your state requires.
Update pay, benefits, and HR records
If compensation changes at the point of conversion — a salary bump, a shift from hourly to salaried, or a bonus eligibility change — process this through payroll before the next pay cycle. Verify the employee's Form W-4 is current; if their tax situation has changed, prompt them to submit an updated one.
Benefits enrollment is the most operationally intensive part of the transition. Common items to activate or confirm:
- Health, dental, and vision insurance — check your plan's eligibility waiting period rules; ACA rules require coverage to start no later than the first day of the fourth month of employment for plans with a 90-day waiting period
- 401(k) or other retirement plan — confirm your plan's eligibility and vesting schedule
- PTO or paid leave — note that the US has no federal statutory paid leave, so your policy governs entirely; make sure accrual start dates match what your handbook says
- Life and disability insurance — often require an enrollment action within a specific window
Update your HRIS to reflect the employee's new status, job classification, and benefit enrollment dates. These records matter if you are ever audited or face a benefits dispute.
Communicate the change in writing
Send the employee a short confirmation letter or email that states:
- Their new employment classification (e.g., regular full-time)
- The effective date
- Any compensation change
- Which benefits they are now enrolled in or eligible to enroll in, and any deadlines
Keep a signed copy in their personnel file. This step is easy to skip when you are busy, and it is almost always the step that creates confusion later — either for the employee who did not realize their PTO accrual had started, or for a manager who cannot remember what was agreed.
If your workforce includes people in multiple states, check state-specific rules around benefit waiting periods, pay frequency changes, and classification requirements. States like California have additional wage and hour rules that can affect how you handle a reclassification from hourly to exempt salaried status.
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