Probation reviews that actually work in the United States
Reviewed by Mellow Editorial Team, HR & payroll content team
A well-run probation review gives you documented evidence to confirm, extend, or end employment before a new hire becomes fully embedded in your team. Done right, it also tells the employee exactly where they stand — which reduces disputes and protects you legally.
Understand what "probation" means legally in the US
Unlike many countries, the United States has no federal statute governing probationary periods. Employment is generally at-will, meaning you can terminate an employee at any time, for any lawful reason, with or without notice — and the employee can leave on the same terms.
So why bother with a formal probation period at all? Because structure protects you. A clearly defined review period:
- Sets measurable expectations from day one
- Creates a paper trail if you need to defend a termination decision
- Signals to the employee that performance is being actively evaluated
One caution: some courts have found that language in offer letters or handbooks implying employees are "permanent" after probation can weaken at-will status. Review your documents with employment counsel to make sure your probation language does not inadvertently create an implied contract.
Set clear, written expectations before the review clock starts
A probation review is only as useful as the goals set at the outset. Before the employee's first day, or no later than week one, document:
- Role-specific performance goals — concrete and measurable, not vague ("manage the inbox well")
- Behavioral standards — attendance, communication, collaboration
- A timeline — 30, 60, or 90 days is common; 90 days is the most widely used benchmark
- How and when formal check-ins will happen — at least at the midpoint and end
Put this in writing and have the employee sign it. That signature is not a contract modification; it is an acknowledgment that they received and understood the expectations.
Run structured check-ins, not just a final review
One meeting at day 90 is too late. If performance is off track, you want to identify that at day 30 or day 45 — early enough to course-correct or, if necessary, to exit cleanly before the employee accumulates more institutional knowledge and stronger workplace relationships.
A practical cadence:
1. Week 1 — orientation check-in, confirm expectations are understood
2. Day 30 — informal progress conversation, note anything concerning in writing
3. Day 60 — formal midpoint review, written summary shared with the employee
4. Day 90 — final probation review with a clear outcome: confirmed, extended, or terminated
At each check-in, write brief notes — date, topics discussed, employee response, any agreed actions. These notes do not need to be formal performance improvement plans at this stage; they just need to exist and be stored somewhere retrievable.
Conduct the day-90 review properly
Structure the final review meeting as a two-way conversation, not a verdict read aloud. A useful format:
Before the meeting: complete a written assessment against the original goals. Rate each goal — met, partially met, not met. Add behavioral observations backed by specific examples, not impressions.
During the meeting: share your assessment, then ask the employee to respond. Listen. Sometimes context matters (a systems failure, a slow onboarding, an unclear brief). Note their response in writing.
After the meeting: issue a written outcome within 24–48 hours. The three options are:
- Confirmed — the employee has met expectations; state that clearly and outline what ongoing performance management looks like
- Extended — used when performance is mixed but improvable; specify a new end date, revised goals, and what "passing" looks like; extensions should be rare and time-limited, not indefinite
- Terminated — if performance or conduct has not met the standard; in an at-will state this is lawful, but your documentation from the previous 90 days is what makes it defensible
If you are terminating, consult your HR advisor or employment counsel first — particularly if the employee is in a protected class or in a state with additional protections. California, for instance, has some of the strongest worker protections in the country, including a near-total ban on non-compete clauses.
Keep payroll and compliance clean throughout
Probationary employees are employees. That means full payroll obligations from day one: federal income tax withholding via Form W-4, FICA deductions (Social Security at 6.2% up to the annual wage base, Medicare at 1.45%), and employer matching on both. If you're running payroll across multiple states, state income tax rules apply immediately — not after probation ends.
If a worker is on a probationary contract and you are unsure whether they should be classified as an employee or independent contractor, resolve that question before they start work, not at the review. Misclassification is one of the most common and costly compliance errors US employers make. How Mellow runs payroll across six countries outlines how classification rules differ by jurisdiction if you are managing a distributed team.
At the end of a probationary period, whether the outcome is confirmation or separation, ensure W-2s are issued correctly — by 31 January following the tax year — and that any final paychecks comply with your state's timing requirements, which vary considerably.
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