Every legal-writing professor and every doctrinal exam is secretly asking you to do the same thing: take a set of facts, find the legal rule, and show your reasoning from rule to result. IRAC, CREAC, and FIRAC are three names for the scaffolding that makes that reasoning visible. Students panic about which one is "right." The honest answer is that they are cousins, not rivals — and once you understand what each letter is actually asking you to do, you can switch between them fluidly depending on whether you're writing a timed exam, a graded memo, or a case brief.

This guide breaks down all three formulas, shows you a worked example of the same analysis in each, and — more importantly — tells you which one to reach for in which situation and where 1Ls consistently lose points.

What is IRAC?

IRAC stands for Issue, Rule, Application (or Analysis), Conclusion. It is the oldest and most widely taught formula, and it is the one you will use on doctrinal exams in Torts, Contracts, Criminal Law, and the rest.

• Issue — the precise legal question raised by the facts. "Did Dan owe Paula a duty of care?" Not "Is Dan liable?"
• Rule — the black-letter law that governs the issue, stated as a rule, not as a case summary.
• Application — the fact-to-rule reasoning. This is the heart of the analysis and where most of the credit lives.
• Conclusion — the answer to the issue you framed.

IRAC's virtue is speed and clarity under pressure. On a three-hour issue-spotter you don't have time to write elegant introductions — you need to spot the issue, drop the rule, and grind through the facts. IRAC is built for exactly that.

What is CREAC?

CREAC stands for Conclusion, Rule, Explanation, Application, Conclusion. (You will also see it as CRAC, CIRAC, or "the rule paradigm" — same idea.) This is the formula your legal-writing professor almost certainly wants on memos and briefs, and there are two things that distinguish it from IRAC.

First, it leads with the conclusion. Lawyers and judges are busy; they want the answer up front, then the support. Second, it adds an Explanation step between the rule and the application. In the Explanation, you unpack the rule using the cases that generated it — how courts have defined the terms, what facts drove past outcomes — before you apply anything to your client's facts.

• Conclusion — your bottom-line answer, stated first.
• Rule — the governing rule.
• Explanation — how courts have interpreted and applied that rule in prior cases (rule illustration).
• Application — your facts against the rule as explained, often analogizing and distinguishing the cases from the Explanation step.
• Conclusion — restate the answer, now earned.

CREAC is slower and more thorough. That's the point: it's the professional writing structure, so legal-writing courses grade on it heavily.

What is FIRAC?

FIRAC stands for Facts, Issue, Rule, Application, Conclusion. It is IRAC with an explicit Facts step at the front. Some professors teach FIRAC as a general analysis formula, but its most natural home is case briefing, where the whole point is to summarize an opinion's facts before you get to the issue and holding.

On an exam, you generally do not want a standing "Facts" section — the facts are given to you in the prompt, and reciting them wastes time you should spend on the Application. FIRAC's facts step is valuable when you're the one supplying the facts (a brief, a memo's statement of facts) or when a professor specifically asks you to identify the legally significant facts as part of the analysis.

The same analysis in all three formulas

Here is one negligence question — Dan texts while driving and rear-ends Paula — written three ways so you can see the machinery.

IRAC version (exam style)

Issue: Did Dan breach his duty of care to Paula? Rule: A driver breaches the duty of care when he fails to act as a reasonably prudent driver under the circumstances. Application: Dan was texting — diverting his attention from the road — when a reasonable driver would have kept his eyes forward, and this inattention caused him to fail to brake before striking Paula's stopped car. Conclusion: Dan breached his duty of care.

CREAC version (memo style)

Conclusion: Dan likely breached his duty of care to Paula. Rule: A driver breaches when he fails to act as a reasonably prudent driver under the circumstances. Explanation: Courts have consistently found breach where a driver engaged in a distracting activity — such as looking away from the road — that a prudent driver would have avoided; distraction that removes attention from driving is a classic breach fact. Application: Like the distracted drivers in those cases, Dan diverted his attention to his phone rather than the road ahead, and unlike a driver reacting to a sudden emergency, Dan created the risk himself. Conclusion: Dan breached his duty of care.

FIRAC version (brief style)

Facts: Dan was texting while driving and rear-ended Paula's stopped vehicle. Issue: Did Dan breach his duty of care? Rule: A driver must act as a reasonably prudent driver under the circumstances. Application: Texting diverted Dan's attention when a prudent driver would have watched the road. Conclusion: Dan breached.

Notice that the Rule and Conclusion barely move between formulas. What changes is the front end (does the answer come first?) and the middle (do you explain the rule separately before applying it?).

Which formula should you use?

• Timed doctrinal exam: IRAC. Speed wins. Skip a standalone facts section, spend your time on Application, and don't lead with the conclusion because you may not know it until you've worked through the facts.
• Legal-writing memo or brief: CREAC. Your professor is grading on organization and rule explanation, so give them the paradigm they teach. Lead with the conclusion and never skip the Explanation step.
• Case brief / reading prep: FIRAC. The Facts step is doing real work because you're summarizing an opinion.
• When in doubt: ask what your professor grades on. A legal-writing professor who lectures on "rule explanation" wants CREAC. A Torts professor who says "just get the analysis down" wants IRAC.

The step-by-step method that works in all three

1. Frame the issue as a yes/no legal question tied to the facts. "Was there consideration?" beats "consideration."
2. State the rule as a rule. "Consideration requires a bargained-for exchange of legal value" — not "In Hamer v. Sidway, the court held…" Save case discussion for Explanation or Application.
3. Explain the rule (CREAC only) using the cases. Show how courts have drawn the line before you draw it.
4. Apply relentlessly. For every element of the rule, point to a specific fact and say why it satisfies or fails that element. Use the words "because" and "here."
5. Conclude on the exact question you framed. A conclusion that doesn't answer the issue signals a runaway analysis.

The mistakes 1Ls make

Treating the Rule step as a case book report. The rule is the rule; the cases go in Explanation or Application. Reciting Palsgraf's facts where the rule belongs wastes words and hides the black letter your professor is scanning for.

Skipping or rushing the Application. This is the single most common — and most expensive — error. The 'A' is where the grader awards points, because anyone can recite a rule; the skill is showing why these facts satisfy it. If your Application is one sentence long, you left points on the table.

Writing a facts section on an exam. The professor wrote the facts. Don't recopy them. Weave the legally significant facts into your Application instead.

Conclusory Applications. "Dan was negligent because he was careless" is not analysis — it's a restatement. Analysis names the specific conduct (texting) and ties it to the specific rule language (failing to act as a reasonably prudent driver).

Rigidly forcing one formula on a mixed question. A complex exam issue may have multiple sub-IRACs (one per element). Nest them. The formula is a servant, not a straitjacket.

When to stop worrying about the formula

The formulas are training wheels for legal reasoning. In your first semester, follow them explicitly and label your steps in your head. By the end of 1L, the structure should be automatic — you'll write an issue, drop a rule, and grind the facts without consciously naming each step. Practicing lawyers rarely think "now I'm at the C in CREAC"; the paradigm has simply become how they argue. The goal is not to memorize acronyms — it's to internalize the discipline of moving from rule to result with every step visible.

Master IRAC for exams and CREAC for writing, keep FIRAC in your pocket for briefing, and remember that whichever one you use, the Application is where the grade lives.