Your 90-Day Probation Is a Notice Window, Not a Test

Probation isn't a trial you pass at day 91 — it's the period before your employer owes you statutory termination notice. Here's what the clause in your contract actually does, what "failing probation" means legally, and what protections apply from day one regardless.

By JobPost Team · Sep 24, 2026 · 4 min read

Nobody hands you a certificate at day 91. There is no ceremony, usually no email, and in most cases no legal change in your status as an employee. What changes is how much it costs your employer to let you go.

The Date In Your Contract Is a Statutory One

The near-universal three-month probation period isn't an HR convention. It's traced directly from employment standards legislation.

In Ontario, the Employment Standards Act requires no termination notice for an employee who has worked less than three months. In British Columbia, the same threshold applies. Alberta uses 90 days. Quebec's labour standards require notice after three months of uninterrupted service. Federally regulated employers under the Canada Labour Code work from a three-month mark too.

Cross that line and the meter starts. In Ontario, three months to one year of service earns one week of notice or pay in lieu. One to three years earns two weeks. After that it's roughly a week per year of service, capped at eight. BC and Alberta scale similarly. These are floors, not ceilings — and they're small. A company that terminates you at month four is looking at one week of pay.

So "probation" describes a window in which your dismissal is cheapest. It doesn't describe a test with a pass mark.

Probation Only Exists If Your Contract Says So

This is the part most people get backwards. A probationary period is not a default condition of employment. It's a contractual term, and if it isn't written into your offer, you don't have one.

That matters because of what sits underneath. Absent a valid written clause limiting termination, employees in common-law provinces are owed reasonable notice, which is a judge-made standard that considers age, length of service, the nature of the role, and how hard it will be to find comparable work. Reasonable notice is almost always longer than the statutory minimum. It can apply to someone who has been on the job for weeks — courts have awarded months of notice to short-service employees who left secure jobs to take the role.

A probation clause is how employers avoid that exposure. But the clause has to survive scrutiny to work:

It cannot contract below the employment standards minimum. A clause promising zero notice with no carve-out for statutory entitlements is a problem the moment you pass the threshold.
Ontario courts have voided entire termination clauses because the "for cause" portion conflicted with the narrower statutory standard for disentitlement. An invalid clause doesn't get read down. It gets ignored, and common law reasonable notice fills the gap.
Probation can't be extended by announcement. Adding another 90 days partway through is a change to the contract, which generally requires the employee's agreement and something in return.

If you're signing an offer, the probation clause is worth more attention than the vacation policy. Ask what notice applies during the period. "Two weeks" written into the clause costs the employer almost nothing and tells you something real about how they treat exits.

"Failing Probation" Has an Actual Legal Standard

Employers often talk about probation as if it were a free pass. It isn't quite.

Where a probation clause is valid, the standard for dismissal is suitability, not just cause. That's a genuinely lower bar — the employer doesn't need misconduct or documented performance failure. But suitability has been interpreted to require a good-faith assessment against the actual requirements of the job, and a fair opportunity for the employee to demonstrate they can do it. An employee who was never trained, never given the tools, or never told what the standard was has an argument that the assessment wasn't made in good faith.

Two things carry no probation period at all:

Human rights protections apply from your first hour. There is no service threshold for discrimination on the basis of disability, pregnancy, family status, race, or any other protected ground. A termination at week six that follows a request for accommodation is a human rights matter, and the probation clause is irrelevant to it.

Reprisal protections apply immediately too. Raising a health and safety concern, refusing unsafe work, or asserting a statutory entitlement is protected regardless of how long you've been there.

A related point: in Quebec, after two years of continuous service an employee gains the right to contest a dismissal made without good and sufficient cause. Federally regulated employees get an unjust dismissal recourse after twelve months. Those are the thresholds that genuinely change your status — not day 91.

What To Do With the Window

If you're the new hire, treat the first three months as an information-gathering period that runs in both directions.

Read the termination clause before you sign, not after something goes wrong.
Ask, in your first week, what success looks like at 30, 60, and 90 days. Get the answer in writing, even if it's just your own summary emailed back to your manager.
If you're being managed out, the question isn't whether you can appeal. It's what the contract says you're owed and whether the clause is enforceable.

If you're the employer, the window is only useful if you use it. Define the suitability standard before the hire starts. Give feedback early enough that it can change something. And terminate inside the window if you already know — dragging an obvious mismatch to month five converts a one-week decision into a much more expensive one, and it wastes the person's time on top of it.

The clause protects you. It doesn't substitute for managing.