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Mass Tort Litigation — No Win No Fee

United States (federal and general)Last reviewed 18 September 2026

Mass tort litigation involves large numbers of individual plaintiffs who have been harmed by the same product, drug, or corporate conduct. These cases are nearly always handled on a contingency fee basis, with attorneys advancing substantial litigation costs.

What Is a Mass Tort?

Direct Answer: A mass tort is a civil action where many individuals are injured by the same product, substance, or corporate conduct. Cases are often consolidated in multidistrict litigation (MDL). Mass tort attorneys work on contingency fees of 33⅓%–40%, advancing all costs.

A mass tort arises when a large number of people are injured by the same product, substance, or corporate conduct. Unlike a class action — where one lawsuit represents all plaintiffs collectively — each mass tort plaintiff files an individual case. These cases are often consolidated through multidistrict litigation (MDL) for efficiency, but each plaintiff retains their own claim and must prove their individual damages.

How MDL Works

The Judicial Panel on Multidistrict Litigation (JPML) can transfer cases with common factual questions to a single federal district court for coordinated pretrial proceedings. The transferee judge manages discovery, resolves common motions, and may conduct bellwether trials. If cases do not settle, they may be remanded to their original courts for individual trials.

Notable Mass Tort Litigation

  • Talcum powder — allegations that Johnson & Johnson talc products contained asbestos and caused ovarian cancer and mesothelioma
  • Roundup (glyphosate) — claims that Bayer/Monsanto's herbicide causes non-Hodgkin lymphoma
  • Camp Lejeune water contamination — claims under the PACT Act for toxic water exposure at the Marine Corps base
  • 3M Combat Arms earplugs — one of the largest MDLs in history involving defective military earplugs
  • Opioid litigation — claims against manufacturers, distributors, and pharmacies for fueling the opioid crisis
  • PFAS (forever chemicals) — environmental contamination claims for per- and polyfluoroalkyl substances

Contingency Fees in Mass Torts

Mass tort attorneys work on contingency, typically charging 33⅓% to 40% of the individual client's recovery. Because these cases require significant resources — expert witnesses, scientific studies, document review — firms may invest millions before any recovery. Some firms specialise exclusively in mass tort litigation.

Mass Tort Guides

Multidistrict Litigation (MDL) Explained

Multidistrict litigation lets federal cases with common factual questions, filed in different districts, be transferred to one judge for coordinate…

Read more

Frequently Asked Questions

What is the difference between a mass tort and a class action?

In a class action, one lawsuit represents all class members collectively. In a mass tort, each plaintiff files an individual lawsuit, but the cases are consolidated for pretrial proceedings (often through an MDL). Each plaintiff must prove their own damages, unlike in a class action.

How do contingency fees work in mass tort cases?

Mass tort attorneys typically work on a contingency fee basis, charging 33⅓% to 40% of the individual recovery. Because mass torts involve individual cases, each client signs a separate retainer agreement with their attorney.

What is multidistrict litigation (MDL)?

MDL is a procedure (28 U.S.C. § 1407) that consolidates similar federal cases before a single judge for pretrial proceedings. MDL is used to streamline discovery and avoid inconsistent rulings. Cases may be remanded to their original courts for trial.

What are some notable mass tort cases?

Well-known mass torts include litigation over talcum powder (Johnson & Johnson), Roundup herbicide (Bayer/Monsanto), 3M Combat Arms earplugs, Camp Lejeune water contamination, opioid manufacturer liability, and PFAS (forever chemicals) contamination.

How long do mass tort cases take?

Mass tort cases often take years to resolve due to the complexity of the litigation, the volume of individual cases, and the scientific evidence involved. Some MDLs have lasted over a decade. Bellwether trials (test cases) are used to help value claims and encourage settlement.

You May Also Be Interested In

Class Action

How class actions differ from mass torts.

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Product Liability

Defective product claims and strict liability.

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Mesothelioma & Asbestos

Asbestos exposure and mesothelioma claims.

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What Is a Contingency Fee?

Complete guide to contingency fees.

Read more

Where this applies: Contingency fee rules are set state by state. Check your own state's rules before acting.

Sources for this page

Every rule stated above is based on the primary sources below. Each link goes to the legislation, court rule or regulator itself so you can check it. Last verified 18 September 2026.

  1. ABA Model Rule 1.5 (Fees)

    Model, not law. Each state adopts its own version. Rule 1.5(d) bars contingency fees in most domestic relations matters and in criminal defence.

  2. Cornell LII — contingency fee
  3. Federal Rule of Civil Procedure 54(d) (costs to the prevailing party)

    A losing plaintiff may be ordered to pay the defendant's taxable costs. There is no US equivalent of QOCS.

Who wrote and checked this page

Written and published by
Edward & Amaury Solicitors (Edward & Amaury Ltd, company no. 12195443), regulated by the Solicitors Regulation Authority under no. 800525.
Legal review
This page has not yet been through independent legal review. It is written from the primary sources listed below, which you can check directly.
Review dates
Last reviewed 18 September 2026. Next review due 18 March 2027.

Fee rules change. California’s medical malpractice fee limits changed on 1 January 2023, and the QOCS rules in England and Wales changed on 6 April 2023. If you spot something out of date, tell us — we publish corrections.

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Where this applies: Contingency fee rules are set state by state. Check your own state's rules before acting.

Sources for this page

Every rule stated above is based on the primary sources below. Each link goes to the legislation, court rule or regulator itself so you can check it. Last verified 2 August 2026.

  1. ABA Model Rule 1.5 (Fees)

    Model, not law. Each state adopts its own version. Rule 1.5(d) bars contingency fees in most domestic relations matters and in criminal defence.

  2. Cornell LII — contingency fee
  3. Federal Rule of Civil Procedure 54(d) (costs to the prevailing party)

    A losing plaintiff may be ordered to pay the defendant's taxable costs. There is no US equivalent of QOCS.

Who wrote and checked this page

Written and published by
Edward & Amaury Solicitors (Edward & Amaury Ltd, company no. 12195443), regulated by the Solicitors Regulation Authority under no. 800525.
Legal review
This page has not yet been through independent legal review. It is written from the primary sources listed below, which you can check directly.
Review dates
Last reviewed 2 August 2026. Next review due 2 February 2027.

Fee rules change. California’s medical malpractice fee limits changed on 1 January 2023, and the QOCS rules in England and Wales changed on 6 April 2023. If you spot something out of date, tell us — we publish corrections.