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. If I could fix one assumption for every founder making a first hire, it would be this one.
So why use one at all? Because the real value of a probation period is not legal. It is structural.
According to a 2007 Wynhurst Group study reported by the Society for Human Resource Management (SHRM), new hires who complete a structured onboarding process are 58 percent more likely to still be with the company three years later. At a small business, where a single bad hire can affect a tenth of the workforce, that structure is not optional.
This guide walks you through 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.
Probation periods usually run 30 to 90 days, SHRM reports, and some run longer: Montana's statutory default, covered below, is 12 months. The 90-day length aligns naturally with the 30-60-90 day onboarding framework that has become the standard for structured new hire development.
Ninety days also happens to be the maximum health insurance waiting period allowed under federal law. That overlap creates a frequent and dangerous point of confusion, which the myths section below clears up.
Is a 3-Month Probation Period the Same as 90 Days?
For practical purposes, yes. A 3-month probation period and a 90-day probation period describe the same evaluation window, and owners use the two phrasings interchangeably. The difference only shows up in how you write the policy, because a count of days and a count of calendar months do not land on the same date.
Count 90 calendar days forward from a March 2 start and you reach May 31. Count three months and you reach June 2. That gap looks trivial until a termination decision or a benefits eligibility date sits inside it. Choose one convention, put it in the policy, and repeat the same wording in every offer letter.
Is a 90-Day Probation Period Required by Law
No. A 90-day probation period is not required by any federal or state law. It is entirely a matter of company policy: you can implement one, modify it, or skip it altogether.
Montana is different. Its law does not require a probation period either, but it does give one real legal weight. 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 (MCA 39-2-904). During probation, they can terminate at will.
If a Montana employer does not establish a specific period, or state that there is none, before or at the time the employee begins work, a default period of 12 months applies by statute. 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.
If you have remote employees in Montana, the default matters: 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 gives you no additional rights and 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. Some 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.
Such a promise 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. The one legal carve-out is Montana's good-cause rule, which protects employees only after probation ends. The specific laws depend on your headcount:
If your business is very small, you may fall below the thresholds for federal anti-discrimination laws. Do not assume that leaves you exempt. 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 own state's requirements before you rely on a federal threshold.
Six Myths Small Business Owners Believe About Probation
Much of what small business owners believe about probation periods is wrong or only half right. These six misconceptions cause the most problems:
All six myths share one misunderstanding: that probation creates a separate legal category of employment. Outside Montana, 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 important element on that 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 costs far less than defending a wrongful termination claim that turns on a single sentence in your handbook.
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
Structured onboarding changes probation outcomes because most probation failures are not hiring mistakes. They are onboarding failures.
In a 2018 survey reported by SHRM, 76 percent of HR leaders said their own organizations were not onboarding new hires effectively. With numbers like that, the problem is rarely that you hired the wrong person. It is that you did not give the right person what they needed to succeed.
Productivity works on a longer clock than the policy does. Gallup (2019) puts the time it takes most people to get up to speed in most jobs at 12 months or more, which means Day 90 catches a new hire partway through the ramp rather than at the end of it. Judge the trajectory, not the output.
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 a role-specific onboarding plan laid out in phases, task workflows with deadlines, e-signed acknowledgments, and document storage. 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) | Immediately, unless a written policy sets the next payday or 15 days, whichever is first | Good cause required for discharge after the probationary period ends |
| California | Yes | No state law | Immediate at termination | Willful late payment: 1 day’s wages per day, 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 | No state deadline | No state final-pay statute; federal law requires no immediate payment |
| 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 for a willful failure to pay accrue at one day of wages per day late for up to 30 days. If you terminate a probationary employee in California and willfully 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.
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 (SB 1034), 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
To terminate an employee during probation, document the problems, rule out a gap in your own onboarding, and deliver the decision in a short, private meeting. 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 is the reason to move early. Talent-management consultant Edie Goldberg, quoted by SHRM (2022), says many employers put the full expense of filling a role at three to four times the position's salary once soft costs, such as managers' time spent on hiring, are counted. Every week of delay adds to that cost.
Before you act, make sure you are dealing with a performance failure and not an onboarding 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 and given clear feedback, and the employee still 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. Unemployment insurance is a joint federal-state program paying workers who are unemployed through no fault of their own as determined under state law, so each state writes its own misconduct standard.
What decides your claim is whether you earned enough in your base period and whether the separation meets your state's misconduct standard. The base period is the window of past wages your state counts, and it includes earnings from all employers, not just the current one.
Being fired for poor performance or for not being a good fit is generally not treated as misconduct, and it typically qualifies you for benefits. Still, check with your own state agency rather than a national summary before you assume either outcome.
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 cover probationary employees too, though some delay when the leave can be used. In California, for example, an employee must complete a 90-day employment period before taking any sick leave.
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, but it is not automatically neutral for unemployment either: a voluntary quit is measured against the good-cause standard written into your own state law, so check with the state agency before you count on benefits based on wages from an earlier job.
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. In a team that size, 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 |
None of these signs, on its own, proves that a decision has been made. Treat each one as a cue to ask your manager for a direct conversation while there is still time to change the outcome.
Frequently Asked Questions
What is a 90-day probation period?
A 90-day probation period is an evaluation window that a company sets by policy for the opening stretch of a new job, while the employer and the new hire each decide whether the fit is right. No federal or state law requires one, and Montana only fills in a default period when an employer has neither set its own nor said there is none. During the window, both sides weigh performance, expectations, and cultural alignment through regular feedback and scheduled reviews. In at-will states, the probation period gives the employer no termination rights beyond the ones it already has.
Can you be fired during the 90-day probation period?
Yes. An employer in any at-will state can end a probationary employee’s job at any point for any lawful reason, and a Montana employer has the same freedom until the probationary period runs out. The limit is the reason behind the decision. Federal anti-discrimination laws such as Title VII, the ADA, and the ADEA, along with their state counterparts, cover a new hire from Day 1. Letting someone go because of race, gender, age, disability, religion, or any other protected characteristic is just as unlawful during probation as it is afterward.
Can you get unemployment if fired during probation?
Yes. Calling someone probationary plays no part in deciding an unemployment claim. The Department of Labor explains that unemployment insurance is a program the federal government and the states run together. It pays people who are out of work through no fault of their own, as each state’s law defines it, so the misconduct standard is written state by state rather than in Washington. A claim usually turns on two points: whether the worker earned enough from all employers combined during the state’s base period, and whether the reason for the firing meets that state’s misconduct definition. Weak performance or a poor fit usually falls short of that bar, so benefits are generally payable.
Does the 90-day probation apply to health insurance?
No. Your probation policy and a health plan’s waiting period run on separate clocks, even though both can be 90 days long. The federal limit is a rule for the plan: once an employee is otherwise eligible for coverage, the plan can make them wait no more than 90 days. The final regulations also allow a reasonable and bona fide employment-based orientation period of up to one month to come first, so coverage can lawfully begin more than 90 days after the hire date. List the benefits eligibility date and the probation end date as two separate items in the offer letter, because new hires who assume the two dates match are a common source of avoidable disputes.
Is a 90-day probation period required by law?
No. Neither federal law nor any state law makes employers adopt a probation period, so using one is a company policy decision. Montana is the only state with a statutory rule on the subject. Under its Wrongful Discharge from Employment Act, a 12-month probationary period applies by default if, by the time the employee starts work, the employer has neither set a specific period nor said that there will be none. An employer may extend the period, but the original period plus every extension cannot exceed 18 months. Once the period is over, a Montana employer needs good cause to discharge the employee.
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. Montana caps the total at 18 months, counting the original probationary period and every extension. In at-will states no law limits extensions, so keep any extension short, such as 30 to 60 days, and state in the letter that there will not be a second extension, which keeps the process from drifting.
What happens if you quit during probation?
The job simply ends. A probationary employee can resign on any day, in any state, with no legal consequences, and no notice period is legally required, although two weeks remains the usual professional courtesy. Leaving early does not put a negative mark on the person’s employment record either. A resignation can still affect unemployment: each state applies its own good-cause standard to decide whether someone who quit voluntarily can still collect, so anyone counting on unemployment benefits based on an earlier job should ask the state agency before giving notice.
Do you get benefits during a probation period?
It depends on company policy and the law, not on the probation label. If the employer offers a health plan, federal rules let the plan make a new employee wait no more than 90 days once they are otherwise eligible, and an orientation period of up to one month may come before that wait begins. Where a state requires paid sick leave, the requirement reaches probationary workers too, although some states delay when new hires can use it; California, for one, makes them wait until they have 90 days of employment. Whether paid time off accrues during probation is a company policy choice. Minimum wage and overtime under the Fair Labor Standards Act (FLSA) apply from the first hour of work, and none of these rights depend on whether the employee is called probationary.
What is the difference between a probation period and a trial period?
In the United States, there is no practical difference. The terms are used interchangeably, federal law gives neither one a distinct legal definition, and both describe the evaluation window at the start of a job. The Society for Human Resource Management (SHRM) has quoted employment experts who recommend switching to introductory period or evaluation period, since some courts have read the completion of a probationary period as implying contract obligations.
Does the 90-day probation period include weekends?
Yes. Unless the written policy says otherwise, a probation period runs on calendar days, so Saturdays, Sundays, and holidays all count toward it. A 90-calendar-day period that starts on a Monday ends exactly 90 days later, however many weekends and holidays fall inside it. An employer that wants to count only business days has to say so in the policy. Montana adds a statutory wrinkle: time an employee spends on a leave of absence is left out of the probationary period unless the employer chooses to count it.