Malpractice Lawsuit in Canada: Proof, Deadlines, and the CMPA

A medical malpractice lawsuit in Canada is a civil claim brought by a patient against a physician or hospital, alleging that substandard care caused injury. In the nine common law provinces, you sue in negligence; in Quebec, you sue in civil liability under the Civil Code of Quebec. Either way, you have to prove through expert evidence that the care fell below the accepted professional standard and that this failure caused your injury, you have to file within your province’s limitation period, and if you win, your damages for pain and suffering are capped at an inflation-adjusted figure that stood at just under $470,000 as of late 2025.¹

What You Have to Prove

In the common law provinces, a medical negligence claim has four elements. The physician owed you a duty of care. The physician failed to meet the applicable standard of care. Your injuries were reasonably foreseeable. And the breach of the standard was the proximate cause of those injuries.² An error in judgment is not negligence on its own, even if it caused real harm. The failures that most often ground a claim are missed or wrong diagnoses, a failure to refer or consult, communication breakdowns between providers, substandard treatment, and failures to warn.

The standard of care is what a reasonably competent practitioner in the same field would have done in similar circumstances. Judges and juries don’t come to that conclusion on their own. Expert witnesses do. You need a qualified medical expert prepared to say in a report, and later in testimony, that the care fell below the standard and that this is what caused your injury.³ Without that expert, a court can draw an adverse inference and the claim collapses.

Informed consent is a separate route. Under the Supreme Court of Canada’s 1980 decision in Reibl v. Hughes, a physician must disclose the material risks that a reasonable person in the patient’s position would want to know before agreeing to treatment.⁴ To win, you have to show that a reasonable person in your particular circumstances would have declined the treatment if the risks had been properly explained. Courts call this the modified objective test; it considers your specific beliefs, fears, and expectations.⁵ In practice, this is a hard test to meet, because courts tend to assume reasonable patients follow their doctor’s recommendation.

How Long You Have to File

Each province sets its own time limit. In most provinces the basic period is two years from the date you discovered, or reasonably should have discovered, that you had a potential claim.⁶ This discoverability rule matters, because medical injuries sometimes don’t become apparent until years after the care. There is usually also an ultimate limitation period that cuts off claims regardless of discovery.

Ontario: two years from discovery, with a 15-year ultimate limitation period from the act or omission; the ultimate period pauses while the claimant is a minor or lacks capacity.⁶
British Columbia: two years from discovery, with a 30-year ultimate limitation period.⁷
Alberta: two years from discovery, with a 10-year ultimate limitation period.⁷
Quebec: three years from the time the right of action arises.⁷
Nova Scotia: six years from when the cause of action arises, with judicial discretion to extend or shorten based on factors including when the claim was discovered.⁷

If you think something went wrong, the practical point is to get records and legal advice early. Expert review takes time, and that time counts against your limitation clock.

How Quebec Is Different

Quebec is the one province that doesn’t follow common law negligence. Claims there proceed as civil liability actions under the Civil Code of Quebec. The physician-patient relationship is treated as contractual, and the physician owes a contractual obligation of means: reasonable skill and diligence, not a guaranteed outcome.⁸ The limitation period is three years rather than two.⁹ Compensation follows the principle of full restitution, and exemplary damages are available only where there has been an unlawful and intentional interference with a person’s rights — a higher bar than the common law test for punitive damages.

What You Can Recover

If your claim succeeds, damages are meant to put you back in the financial position you would have been in without the injury. That breaks into two parts.

Pecuniary damages cover past and future lost income, the cost of future care, and out-of-pocket expenses. These are not capped, and in catastrophic injury cases they drive the total award.

Non-pecuniary damages cover pain and suffering, loss of enjoyment of life, and similar intangible losses. These are capped. In 1978, the Supreme Court of Canada’s “Damages Trilogy” — Andrews v. Grand & Toy Alberta Ltd., Arnold v. Teno, and Thornton v. Prince George School District No. 57 — set an upper limit of $100,000 on general damages in personal injury cases. That cap is adjusted annually for inflation and stood at just under $470,000 as of late 2025.¹ The cap does not apply to injuries caused by intentional torts such as sexual assault.

Punitive damages are rare. Courts reserve them for conduct described as “high-handed, malicious, arbitrary or highly reprehensible,” and only when compensatory damages are not enough to achieve deterrence and denunciation.²

The largest reported awards in Canada are concentrated in birth injury and obstetrical cases, where lifelong care drives the numbers. Reported outcomes include a $26 million case involving extreme delivery delays that caused severe brain injury, a $23 million case tied to a missed diagnosis of bacterial meningitis in a newborn, and a $15.6 million cerebral palsy case involving negligent use of forceps and vacuum delivery.¹⁰ Hypoxic-ischemic encephalopathy, where the baby’s brain is deprived of oxygen during labor, is the most common basis for high-value claims; shoulder dystocia, untreated severe jaundice leading to kernicterus, and failures in neonatal resuscitation recur as well.¹¹ The size of these awards reflects the cost of lifetime care, not the non-pecuniary cap, which is a small fraction of the total.

How a Case Actually Moves

A Canadian medical malpractice case typically takes between four and seven years, with obstetrical cases often taking longer.¹² It starts with a Statement of Claim naming the defendants, setting out the allegations, and specifying the damages sought. The defendants file a Statement of Defence.

Discovery is the long middle. Both sides exchange documents, including medical records; the plaintiff obtains expert medical opinions; and the parties question each other under oath.¹² Mediation is mandatory in some jurisdictions and attempted in most cases. If mediation fails, a pre-trial conference follows, where a judge probes settlement and narrows the issues. Only then does the case go to trial before a judge or jury.¹³ Either side can appeal.

What You’re Up Against: The CMPA

Almost every Canadian doctor you might sue is defended by the same organization. The Canadian Medical Protective Association is a non-profit mutual defence organization with more than 115,000 physician members.¹⁴ Residents and fellows are required to have CMPA protection before beginning postgraduate training.¹⁵

When a doctor is sued, the CMPA assesses whether the standard of care was met. If it concludes the standard was met, it funds a full legal defence; if not, it pursues settlement.¹⁶¹⁷ The CMPA collected $500 million in membership fees in 2024 and held an investment portfolio valued at $5.9 billion.¹⁴

The practical result is that the cost of pursuing a claim often exceeds the potential recovery, which leads plaintiff lawyers to decline meritorious but lower-value cases.¹⁶ The CMPA has responded that vigorous defence is necessary to protect physicians’ professional reputations and that the tort system remains essential to accountability.

Costs, Contingency Fees, and Loser Pays

Canada follows a loser-pays rule in civil litigation, so the losing party is generally ordered to pay a portion of the winning party’s legal costs. That rule sounds like a serious deterrent, and it operates as one psychologically, but the CMPA’s former CEO acknowledged that the organization “seldom attempt[s] to collect costs from plaintiffs when we win,” often because the family is caring for a severely injured person and lacks the means to pay.¹⁸

Most patients fund their case through a contingency fee agreement, under which the lawyer takes a percentage of the recovery and takes nothing if the case loses. Courts routinely approve contingency fees of around 35 percent, with the percentage varying by complexity and risk.¹⁹ Ontario adopted contingency fee agreements in 2002, and courts review fees in cases involving minors or adults under disability. You usually remain responsible for disbursements such as expert report fees, which in a complex malpractice case can run into tens of thousands of dollars.

If You’ve Received an Apology

If a physician or hospital apologized to you after something went wrong, that apology is probably not usable as proof of liability. Most provinces and territories have apology legislation, beginning with British Columbia and Saskatchewan in 2006, that prevents an apology — including an expression of sympathy, a statement of regret, or words that imply fault — from being used as evidence of liability in civil proceedings.²⁰ Factual admissions contained in the same communication, however, remain admissible.²¹ Alberta, British Columbia, Manitoba, Newfoundland and Labrador, Nunavut, Ontario, Prince Edward Island, and Saskatchewan all have some form of apology protection, most based on the Uniform Law Conference of Canada’s 2007 model act.²²

The Odds

Litigation remains uncommon relative to the volume of care delivered. In 2022, roughly 670 new legal actions were commenced, representing about 2.6 percent of adverse medical events classified as “highly preventable.” In the same year, 985 cases were resolved: 638 were dismissed, abandoned, or discontinued; 313 were settled; and 34 went to trial. Physicians won 26 of those 34 trials. Patients won eight.²³

The trial success rate for patients has also fallen over time. In the late 1970s, patients won about one in three cases that reached trial; by the period leading up to 2019, that rate had dropped to roughly one in five. As many as half of lawsuits are dropped before trial.²⁴ The CMPA’s 2024 annual report recorded 958 new civil-legal cases opened and 1,021 resolved; of those, 324 were settled with the plaintiff, 656 were dismissed or discontinued, 32 ended in judgment for the physician, and nine in judgment for the plaintiff. Total compensation paid to patients that year was approximately $322 million, an all-time high.²⁵ Over the decade from 2015 to 2024, the CMPA paid $2.5 billion in patient compensation.¹⁴

Read together, the numbers tell you two things. Most patients who recover anything do so by settlement rather than at trial. And the cases that end in a patient’s favor are, by and large, the ones with strong expert support, clear causation, and damages large enough to justify years of litigation against a well-resourced defence.

1
Watson Goepel. General Damages in 2025: Where the $100,000 Trilogy Cap Sits Now
2
Library of Congress. Medical Malpractice Liability: Canada
3
Blaney McMurtry LLP. Factors to Consider When Retaining Medical Experts
4
Pacific Medical Law. The Evolution of the Law of Informed Consent
5
McGill Law Journal. Reibl v Hughes and Informed Consent
6
Bogoroch & Associates LLP. How Long Do I Have to Sue: Limitation Periods in Ontario
7
Cozen O’Connor. Canada Limitation Periods Digest
8
Alberta Law Review. Medical Liability Under Quebec Civil Law
9
Government of Canada, Department of Justice. Harmonization of Federal Legislation With Quebec Civil Law
10
Sommers Roth & Elmaleh. Our Cases
11
Birth Injury Lawyers Alliance. Verdicts and Settlements
12
Healthcare Insurance Reciprocal of Canada (HIROC). Overview of Medical Malpractice Actions
13
Nova Injury Law. How Does a Medical Malpractice Case Proceed in Canada
14
CMPA. Minutes of the 2025 CMPA Annual Meeting
15
CMPA. CMPA Home
16
Canadian Lawyer Magazine. Protecting Doctors’ Reputation at What Price
17
vLex Canada. Frazer v Haukioja, 2010 ONCA 249
18
Medical Economics. Malpractice: Do Other Countries Hold the Key
19
Birth Injury Lawyers Alliance. Contingency Fees: Access to Justice in Birth Injury Cases
20
Canadian Medical Association Journal. Liability and Apology
21
Canadian Lawyer Magazine. Liability and Apology: Canada’s Apology Act Explained
22
ADR Institute of Canada. Safe and Sorry: Apologies in Canada
23
Manitoba Access to Justice. Medical Malpractice and No-Fault Compensation
24
CBC News. Medical Malpractice Doctors Lawsuits Canada
25
CMPA. 2024 CMPA Annual Report