Class Actions: Litigation at Scale

The first time I sat in on a certification hearing, I expected a courtroom drama. What I got was three lawyers and a judge spending an entire afternoon arguing about whether a group of people had enough in common to be treated as a group at all. No smoking gun, no witness breaking down on the stand. Just a slow, careful conversation about definitions.

That afternoon taught me more about class actions than any textbook. This is litigation, but it runs on a different clock and asks a different set of questions. If you are drawn to the idea of using one lawsuit to solve a problem that affected thousands of people, it is worth understanding how the work actually behaves before you decide it is for you.

What a class action really is

Strip away the branding and a class action is a procedural device. It lets one person, or a small handful of people, sue on behalf of a much larger group who were harmed in a similar way. The named plaintiffs are called the representative plaintiffs. Everyone else in the group is a class member, and most of them will never speak to a lawyer or set foot in a courtroom.

The reason this device exists is simple. Some harms are too small, individually, to be worth suing over. If a company overcharged a million customers by a modest amount each, no single customer would ever hire a lawyer to recover it. But bundle those claims together and the case becomes both economically viable and, arguably, the only realistic way to hold the defendant to account.

That is the moral engine of the practice, and it is genuinely compelling. It is also why the field attracts lawyers who like the idea of scale: one file, one theory, and a resolution that can reach far beyond the people whose names appear on the pleadings.

The stages, and why certification is everything

Most civil litigation has a familiar shape: pleadings, discovery, maybe a motion or two, then trial or settlement. Class actions add a gate near the front that changes the entire dynamic. That gate is certification.

Before the case can proceed as a class action, the court has to be persuaded that it should. The plaintiff has to show, among other things, that there is an identifiable class, that the claims raise common issues, and that a class proceeding is a preferable way to resolve them. The exact wording of the test varies by province, so the analysis in Ontario is not identical to the analysis in British Columbia or Quebec, but the spirit is consistent across the country.

Here is the thing nobody tells you early on: certification often is the case. In practice, a great many class actions settle shortly after they are certified, and a great many die if they are not. The merits matter, of course, but the certification motion is where enormous energy goes, because winning it reshapes the leverage on both sides.

Certification is not about who is right. It is about whether these people belong in the same room. Win that argument and the settlement conversation usually starts the next morning.

The stages, in rough order, tend to look like this:

• Pleadings and the theory of the case. You define the class and the common issues with real precision, because everything downstream depends on those words.
• The certification motion. Both sides file substantial evidence, often including expert reports, and argue whether the case can proceed collectively.
• Common issues litigation. If the case goes forward, the court resolves the questions shared across the class, sometimes at a trial.
• Individual issues and distribution. Even after a win, the court often has to sort out how much each class member actually gets, which can be its own project.
• Settlement approval. Class settlements are not private deals. A judge has to approve them as fair and reasonable, and to sign off on the lawyers' fees.

What the day-to-day work feels like

If you picture a plaintiff-side class-action lawyer standing before a jury, adjust the image. The work is heavily written and heavily strategic. You spend real time on the theory, on the class definition, on marshalling documents, and on managing experts whose reports can run to hundreds of pages.

The files are long. A single class action can outlast an articling student, an associate, and sometimes a partnership. Years, not months, is the normal unit of measurement. That has a real effect on career rhythm: you learn to find satisfaction in incremental progress rather than in frequent verdicts, because verdicts are rare and settlements are the usual endgame.

There is also a distinct emotional texture to plaintiff-side work. You are often representing people who were genuinely wronged and who could never have afforded to fight alone. That can be deeply motivating on a hard week. It can also weigh on you, because the outcomes matter to real people and the timelines are unforgiving of impatience. Pacing yourself is not optional in this practice; it is the practice. I have watched talented juniors burn out not because the work was cruel, but because they treated a five-year file like a five-week sprint.

Plaintiff side, defence side, and where you fit

The field splits into two camps that feel like different jobs.

Plaintiff-side firms tend to be smaller and more entrepreneurial. They often work on contingency, which means they front the costs and only get paid if the case succeeds. That model rewards judgment: a firm that takes weak cases will not survive, so partners think hard about which files to run. For a junior, this side offers early responsibility and a close-up view of strategy, along with the financial reality that the firm is betting on outcomes.

Defence-side work usually lives inside larger firms, defending corporations and institutions against these claims. The economics are steadier, the resources are deeper, and the work is no less intellectually demanding. You are attacking the class definition, testing the common issues, and pressure-testing the plaintiff's theory at every seam. If you enjoy dismantling an argument as much as building one, this side can be a genuinely good fit.

Neither side is more noble than the other. A functioning system needs both, and many lawyers move between them or advise clients on both plaintiff and defence considerations over a career. If you are still mapping the landscape, our practice areas writing walks through how different litigation paths compare, and the Bay Street versus small firm piece is a useful companion when you are weighing firm size against the kind of work you want.

How to get into it as a student or junior

Class-action groups do not usually recruit through a separate channel. You get in the way you get into most litigation: through a litigation-heavy firm, then by making yourself useful to the partners who run these files. A few things genuinely help.

1. Get comfortable with procedure. Class actions are procedure-intensive. A student who actually understands the rules, and who reads the certification case law for pleasure, stands out fast.
2. Learn to write tightly. So much of this work is drafting: facta, class definitions, evidence summaries. Clean, precise writing is currency. If your written materials are sloppy, no one will trust you with the parts that matter.
3. Be patient in interviews about patience. When you interview, signal that you understand these files are marathons. Partners are wary of juniors who want a trial every quarter. Our guide on questions to ask in an articling interview has prompts that work well here.
4. Follow the field. Certification tests and the rules that govern them evolve. Reading recent decisions, even casually, tells an interviewer you are already thinking like someone in the practice.

When you are ready to look for a seat at a firm that runs this kind of work, filter for litigation and complex disputes on our job board, and pay attention to which firms describe class actions in their own words rather than as an afterthought.

Is it the right practice for you

Ask yourself a few honest questions. Do you like problems that take years to resolve, or do you need frequent wins to stay motivated? Are you energized by writing and strategy, or do you crave courtroom time above all else? Can you hold the weight of representing people you will mostly never meet, without letting it hollow you out?

If your answers lean toward patience, precision, and scale, this may be one of the most satisfying corners of litigation you can find. You are not chasing a single dispute. You are trying to fix something that reached a lot of people at once, and doing it inside a set of rules designed to keep that power in check. For the right temperament, that is a rare and meaningful kind of work.

If you want to understand the profession you are stepping into more broadly, the Federation of Law Societies of Canada is a reliable starting point for how regulation works across provinces: https://flsc.ca. Beyond that, the best education in class actions is the one that afternoon gave me. Sit in on a hearing, watch smart people argue about definitions, and notice whether the slow, careful pace makes you restless or makes you lean in.