Win Rates, What They Really Mean, and How to Read Them: What Atlantic Canada Medical Malpractice Clients Should Know

When researching legal representation for a medical malpractice claim, prospective clients will often encounter law firm advertising that references win rates, meaning the proportion of cases a firm claims to have won. These figures are presented as indicators of competence, track record, and the likelihood of a successful outcome. They are, understandably, compelling to someone trying to assess which firm is most likely to achieve a result on their behalf.

They are also, in many cases, significantly less informative than they appear, and in some cases, they can be actively misleading. Understanding why requires understanding both how "winning" is defined in medical malpractice law, and how that definition varies in ways that make firm-to-firm comparisons of win rates unreliable at best and deceptive at worst.

This post is not intended to discourage potential claimants from asking about a firm's track record. It is intended to help them ask better questions, and to understand what the answers actually mean.

What Does "Winning" Actually Mean in Medical Malpractice Law?

The first and most important question to ask when a law firm cites a win rate is: how does that firm define a win?

In civil litigation, the concept of winning is less binary than it might appear. A medical malpractice case can conclude in several ways, not all of which are clearly categorizable as wins or losses. A trial judgment in the claimant's favour is an unambiguous win. A trial judgment in the defendant's favour is an unambiguous loss. But the vast majority of medical malpractice claims in Canada do not proceed to trial; they are resolved through negotiated settlement, and the characterization of a settlement as a win depends entirely on the criteria being applied.

A settlement in which the claimant receives financial compensation that they are satisfied with, in recognition of the harm they suffered, is, in the most meaningful sense of the word, a win. The claimant pursued a claim, the defendant agreed to pay compensation, and the matter was resolved in a way that acknowledged the harm and provided financial redress. That is the outcome the litigation process is designed to produce, and a firm that consistently achieves it for its clients has a genuine and meaningful track record of success.

But other outcomes are sometimes characterized as wins by firms whose definition of the term is more elastic. A case in which all claims are dismissed but no costs are awarded against the claimant, so that the claimant walks away without compensation but also without a costs order, might be characterized by some firms as a win on the basis that no money changed hands in the wrong direction. A case in which the defendant makes a nuisance payment (a small sum paid to make the claim go away rather than in genuine recognition of liability) might be characterized as a win on the basis that the claimant received something. These characterizations are not dishonest in a technical sense, but they do not reflect what most clients mean when they ask about a firm's win rate.

how medical malpractice claims are typically resolved and what settlement means in practice

Why the Ratio Matters More Than the Number

Even where a firm's definition of a win is clear and meaningful, the raw number of wins is not a reliable indicator of performance. A large firm with many lawyers handling a high volume of cases will accumulate a large number of wins in absolute terms, but that number tells a prospective client very little about the proportion of cases that firm takes on that result in a successful outcome.

The relevant metric is not the number of wins but the ratio of wins to total cases, and even that ratio must be interpreted carefully in light of the firm's case selection approach. A firm that only accepts cases where the liability and damages picture is exceptionally clear and strong may achieve a very high win rate, but that high win rate reflects the selectivity of the intake process rather than any particular skill in advancing difficult cases. Conversely, a firm that takes on a broader range of cases, including some that are genuinely contested and could go either way, will inevitably have a lower win rate, but may be doing more for the range of clients who need representation than a firm that only takes the clearest cases.

There is also a meaningful argument, one that Acuity Medical Law endorses, that a firm with a perfect or near-perfect win rate has not served all of its clients well. A firm that wins every case it takes on has, by definition, turned away cases that it was uncertain about, cases that may have had genuine merit but that were not clear enough to meet the firm's intake threshold. Some of those cases, had they been pursued with skill and commitment, might have been won. The clients who brought those cases to the firm and were turned away were not served by a firm whose win rate mattered more than their access to justice.

A realistic and honest win rate, one that reflects a genuine commitment to pursuing meritorious but contested cases alongside clearer ones, will not be perfect. It will reflect the reality that even well-founded cases are sometimes lost, that the adversarial process is genuinely uncertain, and that a firm that fights hard for its clients will not win every fight. The goal, as Acuity Medical Law understands it, is not a perfect record; it is the highest possible rate of success across a range of cases that genuinely merit pursuit.

how Acuity Medical Law approaches case selection and what its intake process involves

The Broader Context: Success Rates Against the CMPA

To understand what a meaningful win rate looks like in Canadian medical malpractice litigation, it is useful to understand the broader statistical context in which these cases are decided. The Canadian Medical Protective Association, the not-for-profit mutual defence organization that provides legal defence and indemnification to the vast majority of physicians practicing in Canada, is the defendant or defendant's insurer in most medical malpractice claims brought against physicians in this country.

The CMPA is a well-resourced, experienced, and highly capable defence organization. It has been defending physicians against medical malpractice claims for over a century, and it brings substantial expertise, resources, and institutional knowledge to the defence of every claim it is involved in. The published literature on outcomes in Canadian medical malpractice litigation suggests that plaintiffs succeed in approximately fifteen percent of cases that proceed through the full litigation process against CMPA-defended physicians, meaning that roughly one in six contested cases results in a plaintiff victory at trial.

That fifteen percent figure reflects the full landscape of cases brought, including those that should never have been pursued, those where the evidence was weak, and those where the plaintiff was unrepresented or poorly represented. It is not a benchmark against which a well-resourced, medically informed, and carefully selective plaintiff firm should measure itself. But it does provide important context: succeeding against CMPA-defended claims is genuinely difficult, and a firm that achieves a materially higher success rate than the published baseline, on the basis of rigorous case selection, strong expert networks, and genuine clinical expertise, is achieving something meaningful.

who the CMPA is and how it operates in the defence of medical malpractice claims

What Questions Should Prospective Clients Actually Ask?

Given the limitations of win rate figures as a standalone metric, prospective clients seeking to assess a firm's track record and capabilities are better served by a more nuanced set of questions. The following are the questions that are most likely to produce genuinely informative answers.

How Does the Firm Define a Win?

As discussed above, this is the foundational question. A win should mean, at minimum, that the client received financial compensation in recognition of the harm they suffered, whether through settlement or trial judgment. If a firm's definition of a win encompasses outcomes that did not result in compensation to the client, that definition should be understood and accounted for when interpreting the figure.

What Is the Firm's Ratio of Wins to Total Cases Taken On?

The ratio is more informative than the raw number. A firm that takes on thirty cases and wins twenty-five has a different record than a firm that takes on three hundred cases and wins two hundred and fifty, even if the percentage is the same, because the volume of cases handled, and the resources and expertise required to handle them, differ enormously. Understanding both the ratio and the volume provides a more complete picture.

How Does the Firm Select the Cases It Takes On?

This question gets to the heart of what a win rate actually reflects. A firm with a high win rate that only accepts the clearest and strongest cases is providing a different (and arguably lesser) service than a firm with a slightly lower win rate that pursues a broader range of meritorious claims. Understanding the firm's intake criteria and case selection approach is essential to interpreting its success record meaningfully.

What Is the Firm's Experience With CMPA-Defended Claims?

For claims against physicians, the involvement of the CMPA in the defence is the norm rather than the exception. A firm's experience navigating CMPA-defended litigation, including its familiarity with the CMPA's defence strategies, its established expert networks, and its track record in cases where the CMPA is defending, is a more specific and relevant indicator of capability than a general win rate across all types of cases.

why the firm's expert network and clinical expertise matter in CMPA-defended claims

Acuity Medical Law's Position on Win Rates

Acuity Medical Law does not publish a specific win rate figure as a marketing claim, and the reasons for that position reflect the analysis set out in this post. A figure published without context, without a clear definition of what constitutes a win, and without disclosure of the case selection criteria that produced it, is more likely to mislead than to inform.

What Acuity Medical Law does hold itself to is a clear internal standard: a win means that the client received financial compensation in recognition of the harm they suffered. That is the outcome the firm pursues on behalf of every client it represents. It is the only outcome that genuinely serves the client's interest in accountability and redress.

The firm also holds itself to a high standard of case selection integrity: taking on cases that it genuinely believes in on the merits, declining cases that do not meet that standard, and being honest with potential clients about which category their circumstances fall into. A firm that takes on cases it does not believe in, in pursuit of volume or visibility, does not serve its clients well, and a high volume of nominal wins achieved on weak cases is not a meaningful measure of the firm's value to the clients who genuinely needed its help.

The firm's in-house clinical expertise allows for a case selection process that is grounded in genuine medical assessment rather than in optimistic legal interpretation of facts that a clinician would recognize as unlikely to support the claim. That process is the most reliable foundation for a track record that is meaningful to clients, because it is built on cases that were pursued because they deserved to be, not because they looked good on paper.

what makes Acuity Medical Law's case assessment process distinctive

A Final Note on Transparency

The medical malpractice legal market in Canada, as in many jurisdictions, is one in which advertising claims can outpace the reality they are intended to represent. Prospective clients are right to approach win rate claims with scrutiny, to ask the questions that produce genuinely informative answers, and to base their choice of representation on a considered assessment of the firm's expertise, approach, and integrity rather than on headline figures that may not mean what they appear to mean.

Acuity Medical Law's commitment is to transparency in all of its client relationships, including transparency about the uncertainty of outcomes, the realistic range of what litigation can achieve, and the honest assessment of where any given case sits in terms of its strength and its prospects. That transparency begins at the first consultation and continues through every stage of the file.

what to expect from an initial consultation with Acuity Medical Law