In Ontario, getting fired for a single, unintentional mistake almost never justifies a termination “with cause,” even if the error cost the company money. Unless you committed severe, intentional misconduct like theft or fraud, your employer is legally required to pay you a full severance package.
Everyone makes mistakes at work. Whether it is a typo in a major client contract, an accidental deletion of an important file, or a miscalculation in a financial report, human error is simply a part of doing business.
Unfortunately, some employers react aggressively when an employee makes a costly error. They may terminate the individual immediately, claiming the mistake constitutes “just cause.” This tactic is designed to strip the employee of their legal right to severance pay and can leave them completely financially stranded. 💸
Ontario courts operate on a principle of proportionality. The punishment must fit the crime. A single lapse in judgment does not erase years of loyal service. Below, we explain why an honest mistake is usually deemed a wrongful dismissal and what steps you can take to protect your rights.
Step-by-Step Process for Handling a Dismissal After a Mistake
Whether you work in a tech firm in Kitchener, an automotive plant in Windsor, or a corporate headquarters in Vaughan, employment law applies universally. Here is how to navigate a sudden termination.
Step 1: Do Not Admit to Gross Negligence
When an employer discovers a major mistake, they often call the employee into a highly stressful meeting. It is crucial that you remain calm. You can apologize for the error, but absolutely do not sign any documents admitting to “gross negligence” or “intentional misconduct.”
Employers will try to use your apologies as evidence to justify firing you without severance. State clearly that it was an honest, unintentional oversight and do not agree to a recorded statement without seeking legal advice.
Step 2: Secure Evidence of Your Past Performance
Ontario courts heavily weigh an employee’s historical record. If you have worked at the company for five years with perfect performance reviews, a single error is incredibly unlikely to meet the high threshold for a “just cause” termination. 📈
Before you lose access to your company portals (if possible), try to secure copies of your past performance evaluations, letters of recommendation, and positive client feedback. This evidence proves you were a competent employee who simply had a bad day.
Step 3: Consult an Employment Law Firm
Because the legal threshold for proving “just cause” is notoriously high in Ontario, your employer has an uphill battle. You should contact a local law firm immediately.
A skilled lawyer will review your case and typically send a demand letter to your former employer. The letter will explain that an honest mistake does not void your rights under the Employment Standards Act (ESA) and demand that they pay your common law severance package.
Step 4: Filing at the Superior Court of Justice
If the employer stubbornly refuses to pay, arguing that your mistake caused massive financial damage, your lawyer will likely recommend filing a Statement of Claim at the Superior Court of Justice.
During litigation, the judge will ask if the employer offered additional training or used progressive discipline before resorting to termination. If the answer is no, you are highly likely to be awarded substantial severance pay.
Analyzing Mistakes vs. Misconduct in Ontario
| Type of Action | Does It Justify Termination Without Severance? |
|---|---|
| Honest Mistake (e.g., sending an email to the wrong client) | No. The employer must pay full severance. It is an unintentional error. |
| Incompetence (e.g., repeatedly failing to meet sales quotas) | Usually No. The employer must provide warnings and training first before terminating for cause. |
| Gross Misconduct (e.g., stealing company funds, deliberate fraud) | Yes. The employment relationship is destroyed, and no severance is owed. |
How Much Does it Cost to Sue in Ontario?
Many employees are afraid to fight back because they assume legal fees will ruin them. Fortunately, the system provides accessible options. As of May 2026, typical costs include:
- Initial Strategy Session: You can expect to pay around $300 to $500 CAD for a lawyer to evaluate your termination and the nature of your mistake.
- Contingency Arrangements: Law firms often take wrongful dismissal cases on a “no win, no fee” basis, claiming approximately 30% of your final settlement.
- Filing Fees: Initiating an action at the Superior Court of Justice generally requires a $242 CAD filing fee.
How Long Does the Process Take?
While being fired is sudden, achieving legal justice takes time.
- Initial Negotiations: A demand letter from a lawyer can sometimes resolve the dispute and secure your severance within 4 to 8 weeks.
- Mediation Process: If the employer wants to argue the severity of the mistake, mediation can stretch the timeline to 6 to 9 months.
- Court Trial: If the company insists on fighting the matter before a judge at the Superior Court of Justice, it can take 12 to 24 months to get a final verdict.
Frequently Asked Questions (FAQ)
Can my employer deduct the cost of my mistake from my final paycheque?
Absolutely not. Under the Ontario Employment Standards Act, an employer is strictly forbidden from deducting money from your wages to cover property damage, shortages, or financial mistakes unless they have a direct court order.
What if I was on probation when I made the mistake?
If you are within your first 3 months of employment (a standard probationary period), an employer can usually let you go without any severance pay, regardless of whether you made a mistake or not.
Will a single mistake stop me from getting Employment Insurance (EI)?
Service Canada generally does not disqualify you from EI for making an honest mistake. They only withhold benefits if the termination was due to deliberate, wilful misconduct.
Does the industry I work in change the “cause” threshold?
Yes, slightly. If you work in a highly regulated industry (like healthcare or finance) where a single mistake endangers lives or breaches strict professional codes, courts may view the error more harshly than a mistake in a retail setting.
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