90-Day Probation Period: Small Business Guide
What small business owners need to know about the 90-day probation period: legal requirements, policy templates, termination rules, and employee rights.
90-Day Probation Period: A Complete Guide for Small Businesses
Legal requirements, policy templates, the 30-60-90 framework, and state-by-state guidance for small businesses hiring without an HR department
A 90-day probation period is one of the most misunderstood concepts in small business HR. Most owners assume it gives them special legal authority to fire someone. It does not. In 49 of 50 states, a probation period provides exactly the same termination rights you already have under at-will employment: none extra.
So why use one at all? Because the real value of a probation period is not legal. It is structural. Companies that treat the first 90 days as a structured onboarding window see 82% better retention and 70% higher productivity compared to companies that just wing it. At a small business, where a single bad hire can affect a tenth of the workforce, that structure is not optional.
This guide covers everything a small business owner needs to know: what a 90-day probation period actually is, what the law says (and does not say), how to write a policy that protects you, how to structure the 90 days for success, and what to do when things do not work out.
What Is a 90-Day Probation Period
A 90-day probation period is a defined window at the start of employment during which an employer evaluates a new hire and the new hire evaluates the employer. It is a company policy, not a legal requirement. No federal law mandates it, and only Montana gives it any special legal meaning.
During probation, both sides are assessing fit. The employer evaluates performance, cultural alignment, attendance, and whether the person can do the job. The employee evaluates whether the role, the team, and the company match what was promised during interviews. Think of it as a mutual evaluation period rather than a one-sided test.
Most companies set probation at 90 calendar days, though some use 30, 60, or 180 days. The 90-day standard aligns naturally with the 30-60-90 day onboarding framework that has become the standard for structured new hire development. It also happens to match the maximum health insurance waiting period allowed under federal law, which creates a frequent and dangerous point of confusion that we will address later in this guide.
Is a 90-Day Probation Period Required by Law
No. A 90-day probation period is not required by any federal law or by 49 of 50 state laws. It is entirely a matter of company policy. You can implement one, modify it, or skip it altogether.
The single exception is Montana. Under the Wrongful Discharge from Employment Act, Montana is the only state that is not at-will after an initial period. Montana employers must show good cause for termination once the probationary period ends. If the employer does not establish a specific period or state that there is none before the employee begins work, a default period of 12 months applies by statute, and the original period together with any extensions may not exceed 18 months (MCA 39-2-910). Leaves of absence do not count toward the period unless the employer affirmatively elects to include them. During probation, Montana employers can terminate at will. If you have remote employees in Montana, this distinction matters, and adopting a generic 90-day policy there shortens your own at-will window from a year to three months.
In all other states, at-will employment means you can terminate any employee at any time for any lawful reason, whether or not they are on probation. A probation period does not give you additional rights. It does not make termination easier from a legal standpoint. What it does give you is a framework for structured evaluation, documented feedback, and clear expectations, which are valuable for operational reasons even if they add nothing legally.
The bigger legal concern is what a probation period can take away. If your policy uses the wrong language, it can create an implied employment contract. Courts have found that phrases like "after completing the probationary period, the employee becomes a permanent member of staff" imply a promise of continued employment. That can convert your at-will relationship into a just-cause standard, meaning you would need to document specific performance failures to justify any future termination.
Which Laws Apply to Your Business During Probation
Every employment law that applies to your business applies equally to probationary employees. There is no legal carve-out for the probation period. The specific laws depend on your headcount:
For the smallest businesses, you may fall below the thresholds for federal anti-discrimination laws. But do not assume that means you are unprotected. States like New York, California, and Illinois have anti-discrimination laws that reach employers far below the federal thresholds, in some cases regardless of size. Check your state requirements.
Six Myths Small Business Owners Believe About Probation
The gap between what small business owners believe about probation periods and what is actually true is enormous. These six misconceptions cause the most problems:
The common thread across all six myths is the same misunderstanding: that probation creates a separate legal category of employment. It does not. Probation is an internal management tool for structuring feedback, setting expectations, and evaluating fit. That is where its power lies, and where small businesses should focus their attention.
How to Create a 90-Day Probation Policy
A written probation policy protects both you and the employee. It sets clear expectations from the start, creates a paper trail if things go wrong, and gives the new hire a roadmap for success. Here is what to include:
The most critical element in that entire list is the at-will disclaimer. It should state explicitly that completing the introductory period does not guarantee continued employment and that the employment relationship remains at-will at all times. Have an employment attorney review the language. A small one-time legal review can prevent a five-figure wrongful termination claim later.
Keep the policy in your employee handbook and review it with every new hire on Day 1 as part of your onboarding documentation process. Get a signed acknowledgment. Store it in the employee file.
The 30-60-90 Day Framework for New Hires
The most effective way to structure a probation period is the 30-60-90 day framework. Instead of vaguely "evaluating" the new hire for 90 days and delivering a verdict at the end, you divide the period into three phases with escalating expectations and formal review checkpoints at each milestone.
The key to making this framework work at a small business is keeping it simple. You do not need elaborate performance management software. A shared document with clear goals for each phase, combined with scheduled check-in conversations, is enough. What matters is that both the manager and the employee know exactly what success looks like at each stage.
At the Day 30 and Day 60 reviews, document everything in writing. Note what is going well, what needs improvement, and what specific actions the employee should take before the next checkpoint. If you end up needing to terminate at Day 90, this documentation becomes your paper trail showing that you gave the employee clear feedback and a fair opportunity to improve.
How Structured Onboarding Transforms Probation Outcomes
Here is the uncomfortable truth about probation periods: most failures are not hiring mistakes. They are onboarding failures. When research shows that 60% of employees who quit in the first 90 days cite lack of training as the primary reason, the problem is not that you hired the wrong person. The problem is that you did not give the right person what they needed to succeed.
The data makes a clear case: the probation period should not be a test. It should be a structured onboarding program with evaluation built in. Companies that approach probation as pure gatekeeping lose employees. Companies that approach it as supported onboarding retain them.
For a small business owner, this reframe changes everything about how you spend those 90 days. Instead of passively watching and judging, you are actively investing in the new hire through daily check-ins in Week 1, a buddy assignment, clear role documentation, progressive skill building, and regular two-way feedback. The evaluation still happens, but it happens in the context of genuine support.
This is exactly why I built FirstHR: to give small businesses a platform that structures the entire 90-day journey with automated check-ins, task tracking, milestone management, and documentation. When the probation period runs on a system instead of on memory, nothing falls through the cracks.
State-by-State Legal Quick Reference
While probation itself is not regulated in most states, several related employment laws vary significantly by state. Here is a quick reference for six states where many small businesses operate:
| State | At-Will | Probation Law | Final Paycheck | Key Notes |
|---|---|---|---|---|
| Montana | No (only state) | 12 months default (18 max) | Next payday or 15 days | Good cause required for discharge after the probationary period ends |
| California | Yes | No state law | Immediate at termination | Penalties of 1 day wages per day late, up to 30 days |
| New York | Yes | No state law | Next scheduled payday | State discrimination law covers employers of any size |
| Texas | Yes | No state law | Within 6 calendar days | No state-mandated paid sick leave |
| Florida | Yes | No state law | Next scheduled payday | No state final-pay statute; regular payday governs |
| Illinois | Yes | No state law | Next scheduled payday | At separation if possible, but no later than the next payday |
Two things stand out in this table. First, California is the most aggressive on final paycheck requirements: you must pay immediately at termination, and penalties accrue at one day of wages per day late for up to 30 days. If you terminate a probationary employee in California and miss the paycheck deadline, you can owe more in penalties than the employee earned. Second, Montana is the only state where the probation period actually affects your legal ability to terminate. If you have even one remote employee working from Montana, you need a specific Montana-compliant policy.
Note that health insurance waiting periods are not in this table, because they are governed by federal law rather than by state law. California briefly imposed its own 60-day cap, but that rule was repealed effective January 1, 2015, and California employers have followed the federal 90-day limit ever since. Several sources still repeat the outdated 60-day figure.
How to Terminate an Employee During Probation
Sometimes, despite your best onboarding efforts, a new hire is not the right fit. When that becomes clear during the probation period, acting sooner is better than waiting until Day 90. The cost of a bad hire at a small business runs well into five figures according to research, and every week of delay increases that cost.
Before you act, make sure the problem is not an onboarding failure rather than a performance failure. Ask yourself: Did the employee receive clear expectations in writing? Did they get regular feedback? Were they given the tools and training to succeed? If the answer to any of those is no, the problem might be your process, not the person.
If you have documented the issues, provided feedback, and the employee has not improved, here is how to handle the termination professionally:
Employee Rights During the Probation Period
If you are reading this as an employee starting a new job with a 90-day probation period, here is what you need to know about your rights.
You Have the Same Legal Protections as Everyone Else
Anti-discrimination laws (Title VII, ADA, ADEA, and state equivalents) protect you from Day 1. Your employer cannot fire you during probation for reasons related to race, gender, age, disability, religion, national origin, pregnancy, or any other protected characteristic. If they do, you have the same legal remedies as any other employee.
You Can Collect Unemployment if Fired During Probation
Probationary status has no effect on unemployment eligibility. What matters is whether you earned enough in your base period (from all employers, not just the current one) and whether you were fired for documented misconduct. Being fired for poor performance or for not being a good fit is generally not considered misconduct and typically qualifies you for benefits.
Your Pay and Benefits Are Governed by Law, Not Probation Status
An employer cannot pay you below minimum wage during probation. Overtime rules under the FLSA apply from Day 1. If your employer offers health insurance, federal law limits the waiting period to 90 days after you are otherwise eligible for coverage, though the rules also permit a bona fide orientation period of up to one month before that clock starts. State paid sick leave laws apply immediately in states that mandate them.
You Can Quit at Any Time
Just as the employer can end employment during probation (in at-will states), you can resign whenever you choose. No notice is legally required, though giving two weeks is standard professional courtesy. Quitting during probation does not create a negative record and does not affect your ability to collect unemployment from your previous employer if you are still within the base period.
How to Succeed During Your Probation Period
The first 90 days set the tone for your entire tenure at a company. Here is what the best employees do during probation to set themselves up for long-term success.
Ask Questions Early and Often
The probation period exists for learning. No manager expects a new hire to know everything from Day 1. Asking questions shows engagement and initiative. Not asking questions signals either overconfidence or disengagement, both of which worry managers.
Write Everything Down
Keep a running document of processes, contacts, tool logins, and institutional knowledge. This helps you ramp up faster and shows your manager that you are taking the role seriously.
Seek Feedback Before It Is Given
Do not wait for the formal 30-day review to learn how you are doing. Ask your manager directly: "What is one thing I could be doing better this week?" This turns the evaluation from something that happens to you into something you actively participate in.
Understand the Unwritten Rules
Every company has cultural norms that nobody explains during orientation. Pay attention to communication style, meeting behavior, response time expectations, and how decisions get made. At a small business, these norms are often informal but deeply important.
Build Relationships Beyond Your Direct Team
At a small company you will work with nearly everyone at some point. Use the probation period to introduce yourself, learn what each person does, and understand how your role connects to theirs. At a small company, cultural fit matters as much as technical ability.
Warning Signs Your Probation Is Not Going Well
| Warning Sign | What It Usually Means | What to Do |
|---|---|---|
| Your manager cancels check-ins repeatedly | You are not a priority, or they are avoiding a difficult conversation | Request a meeting directly and ask for specific feedback |
| You are excluded from team meetings or projects | The team may already be distancing from you | Ask to be included and volunteer for assignments |
| Feedback is vague: "things are fine" | Your manager may not know how to give negative feedback | Ask for specific examples of what good looks like in your role |
| Your workload suddenly decreases | The company may be transitioning your responsibilities | Have a direct conversation about whether something has changed |
| You receive a written warning | This is formal documentation, often a precursor to termination | Take it seriously, create a written improvement plan, and follow up proactively |
Frequently Asked Questions
What is a 90-day probation period?
A 90-day probation period is a company-defined evaluation window at the start of employment where the employer and employee assess mutual fit. It is not required by law in any state except Montana. During this time, both sides evaluate performance, expectations, and cultural alignment through structured feedback and reviews. It provides no additional termination rights in at-will states.
Can you be fired during the 90-day probation period?
Yes. In 49 of 50 at-will states, an employer can terminate an employee at any point during probation for any lawful reason. However, anti-discrimination protections under Title VII, ADA, ADEA, and state equivalents apply from Day 1. An employer cannot fire someone during probation for reasons related to race, gender, age, disability, religion, or any other protected characteristic.
Can you get unemployment if fired during probation?
Yes. Probationary status has no legal effect on unemployment eligibility. Eligibility depends on whether the employee earned enough wages in their base period from all employers and whether they were fired for documented misconduct. Being terminated for poor performance or poor fit is generally not considered misconduct and typically qualifies for unemployment benefits.
Does the 90-day probation apply to health insurance?
No. These are two separate timelines that happen to share a number. Federal law caps health plan waiting periods at 90 days after an employee is otherwise eligible for coverage, and this is a rule about the plan, not about your probation policy. The final regulations also permit a reasonable and bona fide employment-based orientation period of up to one month to run before the 90-day waiting period begins, which means coverage can lawfully start more than 90 days after the hire date. Write the benefit eligibility date into the offer letter separately from the probation end date, because employees who assume the two coincide are a common source of avoidable disputes.
Is a 90-day probation period required by law?
No federal law and no state law requires employers to implement a probation period. It is entirely a company policy decision. Montana is the one exception with a statutory rule: under its Wrongful Discharge from Employment Act, if an employer does not establish a specific probationary period or state that there is none before the employee begins work, a default probationary period of 12 months applies, and the original period together with any extensions may not exceed 18 months. After the period ends, discharge requires good cause.
Can a probation period be extended?
Yes, if the written policy includes extension provisions. The policy should specify the maximum extension length and require documented reasons for the extension, and the extension should be issued in writing before the original period expires. In Montana, the original probationary period together with any extensions cannot exceed 18 months. In at-will states there is no legal limit on extensions, but 30 to 60 day extensions are standard practice, and stating in the letter that there will not be a second extension keeps the process from drifting.
What happens if you quit during probation?
An employee can resign at any time during probation in any state with no legal consequences. No notice period is legally required, though two weeks is standard professional courtesy. Quitting during probation does not create a negative employment record and does not affect eligibility for unemployment benefits from a previous employer.
Do you get benefits during a probation period?
Benefits during probation depend on employer policy and applicable law rather than on probationary status. Health insurance waiting periods are capped at 90 days by federal law, with a permitted orientation period of up to one month before that clock starts. State-mandated paid sick leave typically applies from Day 1 in states that require it. PTO accrual during probation is determined by company policy. Federal minimum wage and overtime rules under the FLSA apply from the first hour of work, and none of these are affected by whether the employee is described as probationary.
What is the difference between a probation period and a trial period?
In the United States, probation period and trial period are interchangeable terms with no distinct legal definitions under federal law. Both refer to an initial evaluation window at the start of employment. Employment attorneys recommend using introductory period or evaluation period instead, as probation and trial carry implied meanings that can create legal exposure in court.
Does the 90-day probation period include weekends?
Yes. Probation periods are counted in calendar days, not business days, unless the written policy specifically states otherwise. A 90-calendar-day probation period starting on a Monday ends exactly 90 days later regardless of weekends and holidays. Employers who want to count only business days must state that explicitly in the policy. Montana handles this differently by statute: leaves of absence do not count toward the probationary period unless the employer affirmatively elects to include them.