You’ve read the diversity jurisdiction rule a dozen times. You know the magic number is $75,000. But then an MBE question drops a wrinkle — multiple plaintiffs, a claim for exactly $75,000, or damages that feel uncertain — and suddenly you’re not sure what the rule actually requires. Amount in controversy on the MBE is one of those topics that looks simple until it isn’t.

Let me break down exactly how this rule works and how the examiners test it.

Why Amount in Controversy Trips Up Bar Takers

Most students memorize “$75,000” and move on. That’s the threshold, sure. But the MBE isn’t testing whether you know the number. It’s testing whether you understand the nuances around it — what counts toward the amount, who gets to aggregate claims, and how courts evaluate whether the threshold is actually met.

The examiners know you’ve seen the number. So they build questions around the edges.

The Basic Rule: More Than $75,000

Diversity jurisdiction under 28 U.S.C. §1332 requires that the matter in controversy exceed $75,000 — exclusive of interest and costs. That word “exceed” matters. A claim for exactly $75,000 doesn’t satisfy the requirement. The amount must be more than $75,000. If you see $75,000 flat in an MBE question, the answer is no diversity jurisdiction.

And notice what gets excluded: interest and costs. A plaintiff can’t pad a $60,000 claim to $80,000 by tacking on anticipated interest. The underlying claim itself has to clear the bar.

The Good Faith Allegation Standard

Here’s where it gets interesting. Courts don’t hold a mini-trial to verify whether the plaintiff will actually recover more than $75,000. Instead, the rule is that the plaintiff’s good faith allegation of the amount controls — unless it appears to a legal certainty that the claim is worth less than the threshold.

That “legal certainty” standard is a high bar for dismissal. If a plaintiff sincerely believes their claim is worth $80,000, the court accepts that allegation unless it’s legally impossible for them to recover that much. For example, if a state statute caps damages in that type of case at $50,000, then it’s certain as a matter of law that the plaintiff can’t reach $75,001. That’s when a court will dismiss for failure to satisfy the amount in controversy.

On the MBE, watch for fact patterns where a statutory cap or a contract limitation makes it legally impossible to reach the threshold. That’s the signal that the good faith allegation won’t save the plaintiff.

Amount in Controversy Elements: What You Need to Know Cold

Break this down into the pieces the MBE actually tests:

1. The threshold is “exceeds” $75,000 — not “at least” $75,000. Exactly $75,000 fails. This distinction shows up in answer choices designed to trap you.

2. Interest and costs are excluded. The amount is measured by the underlying claim. Anticipated interest doesn’t count toward the threshold.

3. The good faith allegation controls. Courts defer to the plaintiff’s claimed amount unless it’s legally certain the claim falls short.

4. A single plaintiff may aggregate all claims against a single defendant. This is a major rule. If one plaintiff has a $40,000 contract claim and a $45,000 tort claim against the same defendant, those can be combined. Total: $85,000. Diversity jurisdiction is satisfied.

5. Multiple plaintiffs generally cannot aggregate their claims. This is the flip side, and it’s tested constantly. If plaintiff A has a $50,000 claim and plaintiff B has a $50,000 claim against the same defendant, they cannot combine those to reach $100,000. Each plaintiff must independently satisfy the amount in controversy — unless they are enforcing a single, undivided interest.

The Aggregation Rules in Practice

The aggregation rules are worth drilling with hypotheticals because the MBE loves to test them.

Hypothetical 1: A citizen of Ohio sues a citizen of Texas in federal court. The plaintiff has three separate claims against the defendant: a breach of contract claim worth $30,000, a negligence claim worth $25,000, and a fraud claim worth $30,000. Can the plaintiff aggregate?

Yes. One plaintiff, one defendant — all claims aggregate. Total is $85,000. Amount in controversy is satisfied.

Hypothetical 2: Two citizens of Ohio — call them plaintiff A and plaintiff B — both sue a citizen of Texas. Plaintiff A’s claim is worth $50,000. Plaintiff B’s claim is worth $50,000. Both claims arise from the same car accident.

No aggregation. Even though the claims arise from the same event, each plaintiff has a separate and distinct injury. Neither plaintiff independently meets the threshold. No diversity jurisdiction for either claim. (Supplemental jurisdiction won’t rescue them here either, since there’s no anchor claim that satisfies the amount in controversy.)

Hypothetical 3: Two shareholders jointly own a piece of property and together sue a defendant to recover $90,000 for damage to that property.

Here, the plaintiffs are enforcing a single, undivided interest — their joint ownership stake. They can aggregate. The $90,000 satisfies the threshold.

The key to the third scenario is the nature of the interest. When multiple parties have a joint, indivisible right — like co-owners of property or partners enforcing a partnership right — courts treat it as one claim. When each party has their own individual injury, they stand alone.

Removal and Amount in Controversy

The amount in controversy rule also shows up in removal questions. When a defendant removes a case from state court to federal court, the amount in controversy must still be satisfied. If the plaintiff’s complaint doesn’t specify a dollar amount (which is allowed in some state courts), the removing defendant must show by a preponderance of the evidence that the amount in controversy exceeds $75,000.

Watch for MBE questions where a plaintiff deliberately pleads an unspecified amount to avoid removal. The defendant can still remove if they can demonstrate the amount likely exceeds the threshold based on the nature of the claims.

Don’t Confuse Amount in Controversy with CAFA

The Class Action Fairness Act (CAFA) operates under different rules. For class actions that meet CAFA’s requirements, the amount in controversy threshold is $5 million in the aggregate, and only minimal diversity is required — meaning at least one plaintiff must be diverse from at least one defendant. This is a separate track entirely. Don’t apply the standard $75,000 per-plaintiff analysis to a CAFA question.

A Note on FlashTables

FlashTables is a set of professionally formatted two-column PDF rule tables covering all seven MBE subjects — 704 rules total, organized by the official NCBE Subject Matter Outline. The amount in controversy rule, including the good faith allegation standard and the aggregation rules, is laid out side-by-side in the Civil Procedure table exactly as you’d need it for the MBE. Whether you’re a law student locking in black-letter Civil Procedure for an outline or a bar taker running through active recall drills, the tables give you the rule and its elements in one clean reference. You can find them at getflashtables.com.

Key Takeaways: Amount in Controversy MBE Rules to Memorize

Before you move on, make sure you can recite these cold:

Amount in controversy questions on the MBE are almost always about the aggregation rules or the good faith standard. Know those two pieces cold, and you’ll handle whatever variation the examiners throw at you.