Subject-Matter Jurisdiction - Civil Procedure Step by Step

Federal question, diversity, corporate citizenship, and amount-in-controversy fields.

Structured Visual

Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.

RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.

highlighted = computed this step

Scope and honesty note

Jurisdiction: United States federal civil-procedure overview; as of 2026-08-28; state and local procedure varies; not legal advice. Synthetic facts are classroom inputs, not findings. This lesson renders structure, refuses unsupported interpretation, cites, abstains, and hands off.

\text{civil procedure model as of }2026-08-28

See the essential structure first

Start with this deliberately incomplete structure, then use the pinned authorities, worked application, exceptions, and handoff below. This deliberately incomplete preview has 5 nodes; exceptions and legal consequences remain in the sourced prose below.

\text{glance nodes}=5

Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.

RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.

Begin with the governing doctrine

Federal courts require constitutional and statutory subject-matter jurisdiction. Federal-question jurisdiction generally follows the well-pleaded-complaint rule: the federal issue must appear in the plaintiff's properly pleaded claim, not merely in an anticipated defense. Diversity jurisdiction requires complete diversity, citizenship determined under entity-specific rules at the relevant time, and an amount in controversy exceeding the statutory threshold, subject to good-faith, legal-certainty, aggregation, and supplemental-jurisdiction rules. Parties cannot create subject-matter jurisdiction by consent.

\text{jurisdiction and procedure before merits}

Pin federal-question jurisdiction

This statute supplies the federal-question grant. Verbatim statutory text: “The district courts shall have original jurisdiction of all civil actions arising under the Constitution, laws, or treaties of the United States.” Source: 28 U.S.C. § 1331; https://www.neochart.com/catalog/federal/judiciary/title_28/chapter_85/section_1331/title28_sec1331_c56e38574c6b/1331_federal_question_the_district_courts_shall_have_origina_0001/index.html; data via neochart.com, snapshot 2026-08.

\text{pinned authority: }28 U.S.C. § 1331

Pin diversity jurisdiction

This statute supplies diversity, citizenship, and amount fields. Verbatim statutory text: “(1) citizens of different States;” Source: 28 U.S.C. § 1332(a); https://www.neochart.com/catalog/federal/judiciary/title_28/chapter_85/section_1332/title28_sec1332_9ba7ff685cb2/1332_diversity_of_citizenship_amount_in_controversy_costs_0001/index.html; data via neochart.com, snapshot 2026-08.

\text{pinned authority: }28 U.S.C. § 1332(a)

Pin corporate principal place of business

The bounded holding excerpt supplies the nerve-center corporate-citizenship rule. Caption: Hertz Corp. v. Friend; court: Supreme Court of the United States; decision date: 2010-02-23. Verbatim opinion excerpt: “We conclude that “principal place of business” is best read as referring to the place where a corporation’s officers direct, control, and coordinate the corporation’s activities.” Source: Hertz Corp. v. Friend, 559 U.S. 77; pinpoint 559 U.S. at 92–93; https://www.neochart.com/catalog/cases/us/volume_559/0077_01/index.html; data via neochart.com, snapshot 2026-08.

\text{pinned authority: }Hertz Corp. v. Friend, 559 U.S. 77

Pin the synthetic fact pattern

A synthetic Texas individual asserts a state-law contract claim for one hundred thousand dollars against a corporation labeled Oklahoma. The file separately records residence, domicile facts, incorporation, headquarters, amount components, and complaint allegations.

\text{stated classroom facts, not findings}

Work the application

The complaint does not present a federal claim merely because a federal defense is anticipated. The diversity path then tests the individual's citizenship, every opposing party, the corporation's incorporation and nerve-center principal place of business, and the amount-in-controversy rules. The numeric comparison clears the stated statutory threshold as a classroom input, but entity citizenship, good faith, aggregation, exclusions, and current law remain for review.

\text{apply stages in order and preserve unknowns}

Read the populated procedure record

The populated trace separates federal-question pleading, individual domicile, corporate citizenship, complete diversity, amount components, threshold comparison, filing time, supplemental claims, removal, remand, and unresolved jurisdiction facts. The rendered record contains 15 populated rows.

\text{populated rows}=15

Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.

RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.

Read the complete record

The complete record keeps sources, stated facts, and questions for review separate. Authority records: NeoChart and official-source fixtures. 28 U.S.C. § 1331 source 1: Pin federal-question jurisdiction. 28 U.S.C. § 1332(a) source 2: Pin diversity jurisdiction. Hertz Corp. v. Friend, 559 U.S. 77 source 3: Pin corporate principal place of business. Synthetic facts: Classroom facts only. Complaint: State-law contract claim requests $100,000 from an Oklahoma corporation. Plaintiff: Individual citizenship facts point to Texas. Corporation: Incorporation and headquarters records are separate. Amount: $100,000 is claimed in good faith; legal certainty and aggregation remain review fields. Application trace: Elements, stages, and unknowns. Federal question: Apply the well-pleaded-complaint rule to the plaintiff's own claim. Diversity: Complete diversity, citizenship at filing, entity rules, and amount must all be supported. Corporate citizenship: State of incorporation and nerve-center principal place are separate. Nonwaivable: Subject-matter jurisdiction must be examined even if parties agree.

\text{sources, stated facts, and open questions}

Narrow summary

Identify the statutory jurisdiction path, prove every citizenship and amount field, and raise subject-matter defects whenever the record requires.

\text{cite, sequence, abstain, hand off}