Also known as:joint liability · jointly and severally liable · joint and several liability
Written by attorneys · grounded in primary & secondary sources — see below
Liability imposed on two or more parties for the same obligation or harm. Each party remains responsible for the entire amount even if others share the duty.
Sources & Authorities
How it applies
Common Examples
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Purported Partner Binds Existing Partners
Marvin joined an existing podcast partnership after its equipment financing began. The supplier relied on Marvin's name in branding during forbearance talks. When the partnership defaulted, the supplier recovered the full unpaid balance from Marvin alone.
Preincorporation Contracts Create Personal Exposure
Marjorie signed a multi-year lab lease for a nonexistent corporation. Zenith Pharma later sued after the lease payments stopped. Marjorie alone satisfied the entire remaining obligation because she knew no entity existed at signing.
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Cases
Uniform Acts
Model Codes
Restatements
Study Supplements
Two hunters fired simultaneously toward a shared target area. One pellet struck the plaintiff in the eye. The plaintiff collected the full judgment from either defendant because both shots were negligent causes of the indivisible injury.
Summers v. Tice199 P.2d 1 (Cal. 1948)
Market Share Defendants Face Collective Exposure
Multiple manufacturers produced identical DES tablets under a common formula. The plaintiff's mother ingested the drug without brand identification. The plaintiff recovered the entire damages from any joined manufacturer holding a substantial market share.
Sindell v. Abbott Laboratories26 Cal. 3d 588 (1980)
Joint Tortfeasors Remain Fully Responsible
A vehicle rollover involved both a design defect and driver negligence. The jury could not apportion the indivisible injuries. The plaintiff obtained the full award from the manufacturer alone under the governing joint liability rule.
Branham v. Ford Motor Co.390 S.C. 203, 701 S.E.2d 5 (2010)
Market Share Liability Does Not Impose Joint Duty
Several DES manufacturers were joined under a market share theory. The plaintiff sought to hold each defendant for the entire judgment. The court limited recovery to each defendant's proportionate market share rather than allowing full collection from any single party.
Brown v. Superior Court44 Cal.3d 1049, 751 P.2d 470, 245 Cal.Rptr. 412 (1988)
Common questions
Frequently Asked
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Does joint liability require the parties to have acted in concert?+
No. Joint liability arises whenever multiple parties contribute to an indivisible harm or obligation, even if their conduct is independent or sequential.
Supporting sources
Can a plaintiff collect the full amount from one jointly liable party?+
Yes. The defining feature of joint liability is that any one responsible party may be required to satisfy the entire obligation or judgment.
Supporting sources
Does a settlement with one jointly liable party release the others?+
No. A settlement with one party discharges only that party's share unless the release expressly provides otherwise. The remaining parties stay liable for the balance.
Supporting sources
Is a joint tortfeasor an indispensable party under joinder rules?+
No. A party subject to joint and several liability need not be joined because the plaintiff can obtain full relief from any other jointly liable defendant.
Supporting sources
199 P.2d 1 (Cal. 1948)Torts
…the judgment against both defendants may stand. It is argued by defendants that they are not joint tort feasors, and thus jointly and severally liable, as they were not acting in concert, and that there is not sufficient evidence to show which defendant was guilty of the negligence which caused the injuries—the shooting by Tice or that by…