Also known as: ratione materiae jurisdiction · jurisdictio ratione materiae · subject-matter jurisdiction · jurisdiction by reason of the matter
Written by attorneys · grounded in primary & secondary sources — see below
A court's power to hear and decide cases involving a particular category of legal claims or subject matter. This power is determined by constitutional or statutory grants that allocate authority over specified types of disputes.
Joy Jiang sues Juarez Holdings in federal court for breach of a supply contract. After discovery closes and a summary judgment motion is fully briefed, the court notices that the amount in controversy is only $60,000. The court dismisses the entire action.
Jennifer Jackson files a federal complaint against Jackson Mutual alleging only state-law claims and seeking $40,000. The insurer moves under Rule 12(b)(1) to dismiss. The court grants the motion and terminates the case.
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Judy Jacobs, a California policyholder, sues several foreign insurers in federal court over an alleged global conspiracy affecting U.S. reinsurance markets. The insurers argue the court lacks authority over the foreign conduct. The court retains the claims that directly affect American commerce.
Joanna Jung sues a federal agency in district court seeking review of an immigration benefits denial. The agency moves to dismiss, arguing the governing statute channels all such claims exclusively to an administrative tribunal. The court examines whether it possesses subject-matter jurisdiction over that category of claims.
Javier Jimenez, a detainee at Guantanamo, petitions for habeas relief after a military commission conviction. He argues the commission lacks authority because Congress never authorized the procedures used. The Court examines whether the commission possessed statutory jurisdiction over the charged offenses.
No. Subject-matter jurisdiction is conferred only by constitution or statute and cannot be created by the parties' consent or conduct. A court must dismiss whenever it determines the power is absent, even if the parties have litigated for years.
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Jurisdiction ratione materiae concerns the court's power over the type of claim or controversy. Personal jurisdiction concerns the court's power over the particular defendant. Both must exist for a valid judgment, but only subject-matter jurisdiction defects require dismissal at any stage.
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A federal court may examine subject-matter jurisdiction at any time, including after trial or on appeal. The obligation to confirm the existence of this power is independent of any party's motion.
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