Consolidation and separate trials trip up more bar takers than you’d expect. Not because the rules are complicated — they’re actually pretty clean — but because test-takers confuse the two, misapply the standards, or forget which one the court controls versus which one a party can push for.

Let’s fix that.

What Consolidation Actually Means Under the FRCP

Consolidation is governed by FRCP 42(a). The rule is straightforward: when actions involve a common question of law or fact, the court may consolidate those actions. That’s the threshold — a common question. Not identical facts. Not the same parties. Just a shared legal or factual issue that makes it sensible to handle the cases together.

The court has three options under Rule 42(a). It can join hearings or trials. It can consolidate the actions entirely. Or it can issue any other orders to avoid unnecessary cost or delay. The court can act on its own motion or on a party’s motion, and the cases must be pending in the same federal district court.

Here’s what the MBE loves to test: consolidation does not merge the cases into one. The actions remain separate for purposes of judgment, parties, and claims. This is a classic trap. Students assume that once cases are consolidated, everything blurs together — different plaintiffs can suddenly assert claims against each other, or the pleadings somehow combine. None of that is true. Consolidation is a case management tool. The cases stay legally distinct.

The Standard: Common Question of Law or Fact

You need at least one common question. That’s it. Courts then weigh whether consolidation would serve judicial economy and convenience without causing prejudice or confusion.

Think about it this way. Say two plaintiffs are both injured in the same multi-car accident. Plaintiff A sues the truck driver in one action. Plaintiff B sues the same truck driver in a separate action filed the same week. Both cases involve the same driver, the same accident, the same question of whether the driver was negligent. A court can consolidate those. Same district, common question of fact — done.

But now imagine Plaintiff A’s case also involves a products liability claim against the truck manufacturer. Plaintiff B has no such claim. Consolidation can still happen because the negligence question overlaps. The products liability piece doesn’t disqualify the consolidation — it just means the court needs to manage the trial carefully.

Separate Trials: The Other Side of Rule 42

Separate trials live in FRCP 42(b). This is the flip side. Instead of combining cases, the court can order separate trials on any claim, crossclaim, counterclaim, third-party claim, or issue — including liability versus damages — when doing so would serve convenience, avoid prejudice, or promote judicial economy.

Notice what’s happening here. Rule 42(a) is about consolidating multiple actions. Rule 42(b) is about splitting issues within a single action. Different direction, same rule number. That distinction matters on the MBE.

The classic separate trial scenario: a defendant in a personal injury case argues that the jury should decide liability before it ever hears about damages. If the damages evidence is inflammatory — think catastrophic injuries with graphic medical testimony — the defendant might argue that a jury hearing all of it at once will be prejudiced on the liability question. A court can order a separate trial on liability first. If the defendant wins on liability, you never get to damages at all.

Another common setup: bifurcating a case where there’s a complex affirmative defense that might resolve everything. Try the defense first. If it succeeds, the rest of the trial disappears.

What the MBE Actually Tests

When you see a consolidation and separate trials MBE question, the examiners are typically probing one of three things.

First, whether consolidation is even available. Remember: same district, pending actions, common question of law or fact. If the cases are in different districts, consolidation under Rule 42(a) isn’t on the table. The answer choice that says “the court should consolidate” is wrong if the actions are pending in different federal districts.

Second, who controls the decision. Both consolidation and separate trials are within the court’s discretion. A party can move for either, but the court decides. This matters because an answer choice that frames consolidation as a party’s right — rather than the court’s discretion — is wrong.

Third, the purpose behind the motion. Separate trials exist to prevent prejudice and promote efficiency. If a question asks why a court might bifurcate liability and damages, the answer isn’t “because the defendant requested it” — it’s because doing so avoids prejudice or serves judicial economy. The reason matters, not just the outcome.

The Mistakes That Cost Points

Let’s be direct about the errors students make.

Mistake 1: Confusing consolidation with joinder. Joinder under Rules 19 and 20 is about bringing parties or claims into a single action. Consolidation is about managing multiple already-filed actions together. These are different mechanisms with different standards.

Mistake 2: Thinking consolidation merges parties. After consolidation, Plaintiff A in Case 1 cannot suddenly assert claims against Plaintiff B in Case 2 just because the cases are consolidated. The actions remain separate. Judgments are entered separately.

Mistake 3: Applying the wrong standard for separate trials. Some students think a party is entitled to a separate trial on damages if they ask for one. Wrong. The court weighs convenience, prejudice, and efficiency. It’s discretionary, not automatic.

Mistake 4: Missing that Rule 42 applies only in federal court. The MBE tests federal civil procedure. Rule 42 is an FRCP rule. State courts have their own consolidation procedures. If the question is set in state court, the FRCP doesn’t control.

A Quick Fact Pattern to Test Yourself

Here’s a hypothetical. Two plaintiffs, both employees of the same company, sue their employer in federal court for employment discrimination. The cases are filed separately but assigned to the same district judge. Both plaintiffs allege the same discriminatory policy was applied to them. The employer moves for separate trials on liability and punitive damages in each case.

What can the court do?

The court can consolidate the two cases under Rule 42(a) because there’s a common question of law and fact — the discriminatory policy. The court can also, within each consolidated action, order a separate trial on punitive damages under Rule 42(b) if the punitive damages evidence would be unfairly prejudicial on the liability question. Both moves are discretionary. Neither is a right.

That’s the kind of layered question you might see on the consolidation and separate trials bar exam question. Know both rules. Know they can operate together.

FlashTables on This Rule

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 Civil Procedure table includes 99 rules, and the Rule 42 consolidation and separate trials rules are laid out side-by-side so you can see the standard, the elements, and the distinctions at a glance. Whether you’re a law student locking in black-letter law for your Civ Pro outline or a bar taker drilling active recall in the final weeks before the MBE, having these rules in a clean, structured format makes the difference between confusing Rule 42(a) and 42(b) and knowing them cold. You can find the full table set at getflashtables.com.

Key Takeaways: What to Memorize

Here’s what you need to walk into the exam knowing:

Get those five points locked in and Rule 42 becomes one of the easier topics in Civil Procedure. The MBE rewards students who know the rules precisely — not approximately.