A lawsuit with multiple plaintiffs lets several people with related claims against the same defendant pursue them together instead of filing separate cases. There are four main forms this can take — joinder, mass tort, multi-district litigation, and class action — and the form controls almost everything that matters to you: how much say you have in your own case, whether your compensation reflects your specific injuries, and how actively you have to participate.
The Four Forms Compared
The simplest form is a joinder. Under Federal Rule of Civil Procedure 20, a small group of plaintiffs can file together when their claims arise from the same transaction or series of events and share at least one common legal or factual question.1Legal Information Institute. Federal Rules of Civil Procedure Rule 20 – Permissive Joinder of Parties Several passengers injured in the same bus crash suing the driver together is the classic example. Each plaintiff keeps full control of their individual claim, and the court handles everything in one proceeding.
A mass tort covers a larger group harmed by the same source but suffering different injuries. Defective medical devices, contaminated pharmaceuticals, and industrial disasters are common triggers. Each plaintiff files and maintains a separate lawsuit, but the cases are grouped for pretrial work like document exchange and expert testimony. Because every claim stays individual, compensation reflects each person’s actual harm rather than a flat payout.
Multi-district litigation, or MDL, sits between a mass tort and a class action in how much it consolidates. When lawsuits raising the same factual questions are filed in different federal courts around the country, the Judicial Panel on Multidistrict Litigation can transfer them all to a single judge for pretrial proceedings. The authorizing statute, 28 U.S.C. § 1407, requires the panel to find that consolidation serves the convenience of the parties and witnesses and promotes efficient handling.2Office of the Law Revision Counsel. 28 U.S. Code 1407 – Multidistrict Litigation Every plaintiff in an MDL keeps their own individual case; a lead group of attorneys coordinates pretrial work so the defendant isn’t facing thousands of duplicate requests, but your damages are still valued based on your specific injuries.
A class action is the most consolidated form. One or a few representative plaintiffs sue on behalf of an entire group — sometimes tens of thousands of people — who all suffered essentially the same injury. Consumer overcharges, data breaches, and defective-product recalls are typical class action territory. Most class members participate passively: they don’t hire their own lawyers or appear in court. The tradeoff for that convenience is less individual control and, in most cases, smaller per-person recoveries.
What Control You Keep Over Your Own Claim
In a joinder or mass tort, you keep essentially everything. You have your own attorney (or share one knowingly), your own case number, and your own say over whether to settle. A mass tort coordinates pretrial efficiency; it doesn’t take decisions out of your hands.
In an MDL, you also keep your individual case, but strategy flows through court-appointed lead counsel for the duration of pretrial. Cases that don’t settle get sent back to the federal court where they were originally filed for trial.2Office of the Law Revision Counsel. 28 U.S. Code 1407 – Multidistrict Litigation Most MDL cases settle before reaching that point.
Bellwether trials are the mechanism that often drives those settlements. The judge and attorneys select a handful of representative cases to test how juries respond to the evidence. If early verdicts favor plaintiffs, the defendant faces pressure to negotiate a global settlement covering the remaining cases. If the verdicts cut the other way, plaintiffs may need to adjust expectations. Bellwether outcomes shape the settlement framework for everyone in the MDL.
In a class action, you give up most individual control in exchange for not having to run a case yourself. The lead plaintiff and class counsel make the strategic calls on behalf of the entire class, and a judgment or approved settlement binds every class member who didn’t opt out.3Legal Information Institute. Federal Rules of Civil Procedure Rule 23 – Class Actions
What You Have to Do If You’re Already in One
If you’re a member of a certified damages class under Rule 23(b)(3), the court must send you the best notice practicable, identifying you individually whenever possible. That notice explains the claims, defines the class, and tells you how and when to request exclusion.3Legal Information Institute. Federal Rules of Civil Procedure Rule 23 – Class Actions From there, you have three real choices.
You can opt out. Opting out asks the court to exclude you from the class, which means the outcome — win, lose, or settle — does not affect you, and you keep the right to file your own lawsuit. This matters most when your individual damages are large enough to justify a separate case, because class action payouts tend to be smaller per person.
You can stay in and do nothing further for now. A judgment or approved settlement then binds you, and you cannot later sue the same defendant over the same claims.3Legal Information Institute. Federal Rules of Civil Procedure Rule 23 – Class Actions Missing the opt-out deadline is one of the most common and most consequential mistakes people make in class action litigation.
You can stay in and object. If a settlement is proposed and you think it’s unfair, you can file written objections with the court, stating specifically why. The court weighs those objections at the fairness hearing before approving or rejecting the deal. An objection can challenge the total amount, the distribution method, or the attorney fee request — any aspect that affects the class.
Then there’s the claims process. Most class action settlements require you to submit a claim form after approval. A third-party administrator sends notices and collects forms, and you typically need basic documentation proving you qualify: a proof of purchase, an account number, or medical records depending on the case. There’s a deadline, and missing it usually means forfeiting your share.
How Settlements Get Negotiated and Approved
In a simple joinder, every individual plaintiff typically needs to agree before a settlement goes through. Each person retains full authority over their own claim.
In a class action, the lead plaintiff and class counsel negotiate with the defendant, but their agreement alone doesn’t close the deal. Any proposed settlement must go to the court for approval. The judge holds a fairness hearing and can approve the settlement only after finding it fair, reasonable, and adequate — considering whether the class was adequately represented, whether the deal was negotiated at arm’s length, whether the relief is sufficient given the risks of trial, and whether class members are treated equitably relative to each other.3Legal Information Institute. Federal Rules of Civil Procedure Rule 23 – Class Actions
MDL settlements work differently. Because each plaintiff has an individual case, a global settlement typically includes a process that calculates each person’s compensation based on their specific injuries. Plaintiffs can accept or reject individually, though most MDL settlements include participation thresholds, meaning the deal only goes through if a high enough percentage of plaintiffs agree.
How the Money Gets Split
Attorney fees come off the top. Lawyers in multi-plaintiff cases almost always work on contingency, taking a percentage of the recovery rather than billing hourly. In class actions, the court must approve attorney fees as reasonable under Rule 23(h), and class members can object to the fee request.3Legal Information Institute. Federal Rules of Civil Procedure Rule 23 – Class Actions A benchmark of around 25% is commonly referenced in federal class actions, though actual awards vary with the complexity and duration of the case. Litigation costs — expert witnesses, filing fees, document production — are deducted separately.
What’s left goes to the plaintiffs. In class actions involving identical harm, each class member who submits a valid claim receives an equal share. Where injuries differ, the distribution uses a tiered system that pays more to people with more serious documented harm. Mass tort and MDL settlements almost always use individualized calculations.
Money left unclaimed after the deadline sometimes gets redistributed to class members who did file, returned to the defendant, or directed to a charitable organization in what’s known as a cy pres distribution. Courts have discretion over which approach to use.
Taxes on What You Receive
Whether your settlement money is taxable depends on what the payment is compensating you for, not on what type of lawsuit produced it. The IRS starts from the premise that all income is taxable unless a specific provision says otherwise.4Internal Revenue Service. Tax Implications of Settlements and Judgments
Damages received on account of personal physical injuries or physical sickness are excluded from gross income under IRC Section 104(a)(2). The exclusion covers compensation for medical expenses, pain and suffering, and loss of physical function, as long as the underlying claim involves a bodily injury, and it applies whether the money comes through a verdict or a settlement.5Office of the Law Revision Counsel. 26 USC 104 – Compensation for Injuries or Sickness
Most other categories are taxable as ordinary income:
- Punitive damages are always taxable, even in physical injury cases. The one narrow exception is wrongful death claims in states where the only available remedy is punitive damages.4Internal Revenue Service. Tax Implications of Settlements and Judgments
- Lost wages and business income are taxable unless a physical injury caused the lost earnings.
- Emotional distress without physical injury is taxable, except for the portion that reimburses actual medical expenses related to the emotional distress, and only if you didn’t already deduct those medical costs on a prior tax return.5Office of the Law Revision Counsel. 26 USC 104 – Compensation for Injuries or Sickness
- Employment discrimination recoveries are taxable, including compensatory and contractual awards, regardless of whether the discrimination involved age, race, gender, religion, or disability.4Internal Revenue Service. Tax Implications of Settlements and Judgments
- Interest on settlement payments is always taxable as interest income, even when the underlying settlement is tax-free.
For a class member receiving a small check, the tax consequences are often minimal. For a mass tort plaintiff receiving a six-figure settlement, or anyone whose recovery includes multiple damage categories, the tax treatment of each piece matters. Settlement agreements that allocate the payment among different damage types give you and the IRS a roadmap, and getting that allocation right before you sign is far easier than arguing about it afterward.