Ask around after a termination and someone will confidently supply the formula: severance in Ontario is one month per year of service. It is repeated by HR departments, colleagues, and internet forums with equal conviction. It is also wrong. Ontario courts have never adopted a tenure-based formula for common law reasonable notice, and they have said so directly when invited to apply one. The actual framework, the Bardal factors, weighs age, the character of the employment, and the state of the job market alongside tenure, and it routinely produces results the formula cannot predict.
The gap matters in both directions. Employees who trust the formula may accept an offer far below their real range, or dismiss a strong claim as not worth pursuing because their tenure is short. This article explains where the myth comes from, how the factors actually move notice periods up and down, and why the honest answer to "how much notice am I owed" is a range, not a point. A severance calculator built on the Bardal factors is a better starting point than any mental arithmetic based on years of service.
Where the One-Month-Per-Year Rule Comes From
The rule of thumb has understandable origins. Across large numbers of decided cases, notice awards for mid-career, mid-tenure employees often land in territory that looks roughly consistent with a month per year. Lawyers use tenure as a quick anchoring device in early conversations, and the shorthand escaped into general circulation stripped of its qualifications.
But an average across many cases is not a rule for any one case. Courts assessing reasonable notice do not start with tenure and multiply. They weigh four factors together, and tenure is only one of them. Where the other three factors are strong, awards pull well above the formula; where they are weak, awards fall below it. The formula fails worst at the edges: very short service, older employees, highly specialised roles, and depressed job markets all produce outcomes the multiplication cannot reach.
It is also worth separating the myth from the statute. The Employment Standards Act, 2000 provides a minimum of one week per completed year of service, capped at eight weeks, for employees with at least three months of service. That is a statutory floor, not an estimate of the common law entitlement, and the two layers are explained in detail in what you're actually owed under the ESA and common law. The one-month-per-year figure has no legal source at all: it is folklore occupying the space between the statutory week and the judicial assessment.
What Courts Actually Do: The Bardal Factors
Ontario courts assess reasonable notice using the Bardal factors: the character of the employment, the length of service, the age of the employee, and the availability of similar employment having regard to the employee's experience, training, and qualifications. The purpose of the exercise is compensatory. Reasonable notice approximates the time a particular employee, with their particular profile, will realistically need to secure comparable work. Everything about how the factors operate flows from that purpose.
No arithmetic combines the factors. Courts weigh them holistically, guided by awards in previously decided cases involving comparable employees, and different judges can reasonably land at different points for the same facts. That is why practitioners describe entitlements as ranges. How courts structure this assessment, factor by factor, is examined at length in how Ontario courts calculate common law reasonable notice. What follows is the part the formula misses: how each factor moves the number.
How Age Moves the Range
Age is the factor the formula ignores most completely, and it is often decisive. Older employees generally receive longer notice because re-employment demonstrably takes longer later in a career. Hiring bias, the narrowing of roles at senior ages, and the reluctance of employers to invest in training near retirement all extend a realistic job search. Two employees with identical tenure and identical roles can have meaningfully different entitlements if one is in their thirties and the other in their late fifties.
The effect compounds with the other factors. An older employee in a specialised role faces both a thinner market and a longer search within it. The formula, blind to age, treats these employees identically to young colleagues with the same start date, and systematically undervalues the claims of the workers who need the notice period most.
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The seniority, specialisation, and responsibility of the role pull notice up or down independently of tenure. Senior managers, executives, and deeply specialised professionals typically receive longer notice than junior or generalist employees with equivalent service, because comparable positions are scarcer and searches at that level run longer. Conversely, a role for which openings are plentiful pulls the range down.
Specialisation cuts in a particular way. An employee whose expertise is narrow and employer-specific may have spent years becoming extremely valuable to one organisation and correspondingly harder to place anywhere else. Courts recognise that dynamic. The formula does not: it would give the specialist and the generalist the same number if they were hired in the same month.
How the Job Market Moves the Range
The fourth factor asks a bluntly practical question: given this employee's experience, training, and qualifications, how available is similar work? A contracting industry, a remote region with few comparable employers, or a wave of layoffs flooding the market with similar candidates all lengthen a realistic search and, with it, the notice range. A hot market for the employee's skills does the opposite.
This factor also makes notice assessments sensitive to timing. The same employee, terminated in different economic conditions, can have a different range. No tenure-based formula can capture a variable that has nothing to do with tenure.
Why Short-Service Employees Often Beat the Formula
The formula fails most visibly for short-service employees, and it fails in the employee's favour. One month per year would give an employee terminated after eighteen months a notice period too short to conduct any serious job search. Courts have declined to reason that way. A short-tenure employee still faces the full difficulty of the market, and where age, seniority, or specialisation are in play, awards for brief service are routinely several times what the formula predicts. Proportionally, per year served, short-service employees are often the best-compensated claimants in the case law.
The circumstances of hiring can add further weight. An employee recruited away from secure employment and dismissed shortly afterwards may see that fact reflected in the assessment. None of this appears anywhere in the rule of thumb, which is one reason short-service employees so often walk away from valid claims: the formula tells them their claim is trivial when the law says otherwise.
Why Long-Service Employees Can Beat It Too
At the other end of the spectrum, the formula is not a ceiling. Long-service employees who are also older, senior, or specialised can receive notice exceeding a month per year, because the factors stack rather than average out. There is no statutory cap on common law notice, and courts have made substantial awards to long-tenured employees whose profiles made re-employment genuinely difficult.
The honest caveat runs the other way as well. Tenure alone does not guarantee a long notice period. A long-serving employee who is young, holds a junior role, and works in a field with abundant openings may be assessed below the formula, precisely because the purpose of notice is a realistic bridge to comparable work rather than a reward for years served. Employers make exactly this argument in negotiation, and it sometimes succeeds. The formula misleads in both directions; the factors decide.
Ranges Are Ranges, Not Points
Even a careful application of the Bardal factors does not produce a single correct number. It produces a range within which a court could reasonably land, informed by decided cases with comparable profiles. Two experienced employment lawyers can look at the same facts and give overlapping but different ranges, and both can be right about the law. Negotiations are conducted, and cases are settled, inside that band of reasonable outcomes.
For an employee assessing an offer, this has a practical consequence: the question is not whether the offer matches a formula, but where it sits relative to a realistic range. An offer at or near the statutory minimum usually sits far below the bottom of the common law range. An offer inside the range may still leave room to negotiate toward its middle or top, depending on the strength of the factors. Framing the assessment as a range also sets honest expectations: the top of the range is an argument, not an entitlement, and outcomes reflect litigation risk on both sides.
Practical Next Steps
The starting point is to replace the formula with the factors. An employee can estimate their notice range using a calculator that applies the Bardal factors to their age, tenure, role, and market, and compare the employer's offer against that range rather than against mental arithmetic. Where the offer sits below the range, many employees raise the gap directly with the employer or through a formal demand letter setting out the assessment and its basis.
Complications warrant professional review: a termination clause that purports to limit the entitlement, an allegation of cause, a possible human rights dimension, or simply a large gap between offer and range. In those situations, a consultation with a licensed Ontario employment lawyer can refine the range and the strategy before anything is signed.
Frequently Asked Questions
Q1: Is severance in Ontario one month per year of service?
No. The one-month-per-year figure is a rule of thumb, not a legal rule, and Ontario courts have repeatedly declined to apply tenure-based formulas. Common law reasonable notice is assessed holistically using the Bardal factors: the employee's age, length of service, the character of the employment, and the availability of similar work. Tenure is only one of the four factors. An employee's actual entitlement can land well above or below what the formula would predict depending on how the other factors combine. Short-service employees, in particular, often receive proportionally far more than one month per year, because their age, seniority, or a difficult job market can outweigh brief tenure. The formula also has no statutory basis: the Employment Standards Act minimum is one week per completed year, capped at eight weeks, which is a floor and not an estimate of the common law entitlement.
Q2: Why do short-service employees often beat the one-month-per-year formula?
Because reasonable notice compensates for the expected difficulty of finding comparable work, not for loyalty accrued. An employee recruited into a senior role and terminated after a year still faces the same job market as a longer-serving peer, and courts have recognised that brief tenure does not shrink that challenge proportionally. Applying a strict formula to a short-service employee would produce a notice period too short to reflect any realistic job search. As a result, courts assessing short-tenure dismissals tend to weight age, the character of the employment, the availability of similar positions, and sometimes the circumstances of recruitment more heavily than length of service. Proportionally, per year of service, short-tenure employees frequently receive the largest awards, which is precisely the opposite of what the one-month-per-year rule of thumb predicts.
Q3: What are the Bardal factors in Ontario employment law?
The Bardal factors are the framework Ontario courts use to assess common law reasonable notice. There are four: the character of the employment, meaning the seniority, specialisation, and responsibility of the role; the length of service; the age of the employee; and the availability of similar employment having regard to the employee's experience, training, and qualifications. No formula combines them. Courts weigh the factors together against the specific facts of each case, guided by outcomes in previously decided cases with comparable profiles. A factor that dominates one case may carry little weight in another. The result is a range of reasonable outcomes rather than a single correct number, which is why lawyers and courts speak of notice ranges rather than fixed entitlements.
Q4: Can a long-service employee get more than one month per year of service?
Yes. The one-month-per-year figure is not a ceiling any more than it is a floor. A long-service employee who is also older, holds a senior or specialised position, or faces a thin market for comparable roles can receive notice that exceeds what the formula would suggest, because the factors compound rather than cancel out. Courts have awarded lengthy notice periods to long-tenured employees whose age and role made re-employment genuinely difficult, and there is no statutory cap on common law notice. At the same time, tenure alone does not guarantee such an outcome: a long-serving employee who is younger and highly employable may land below the formula. The entitlement in any given case emerges from the interaction of all four Bardal factors, not from tenure multiplied by a constant.
Q5: How do I find out my actual notice range in Ontario?
The realistic approach is to assess the four Bardal factors against your own profile: your age at termination, your length of service, the seniority and specialisation of your role, and the state of the market for comparable positions. Because courts decide these cases by reference to previously decided cases with similar profiles, the practical output is a range, and where you sit within it depends on the strength of each factor. A calculator built on these factors can produce a preliminary estimate quickly, and a review by an employment lawyer can refine it, taking into account complications such as a termination clause, allegations of cause, or human rights dimensions. Whatever the source, an estimate framed as a range is more reliable than any single-number formula, and an offer should be evaluated against that range rather than against a rule of thumb.
Jordan is an Ontario employment lawyer (J.D., licenced member of the Law Society of Ontario) and the founder of DemandPay, a platform that helps terminated employees understand and negotiate their termination packages. DemandPay provides legal information, not legal advice. More about Jordan