Law essays are among the most technically demanding assignments at university — they require precise legal reasoning, accurate citation of case law and statutes, critical analysis of legal arguments and a command of legal writing conventions that most students are never explicitly taught. This guide covers everything you need to write a first-class law essay, from the IRAC method to OSCOLA referencing.
📋 Table of Contents
Types of Law Essays
- Problem questions — present a factual scenario and require you to advise parties on their legal position using the IRAC method
- Essay questions — require critical analysis of a legal principle, rule, debate or reform proposal
- Dissertation chapters — extended critical research on a specific area of law
- Mooting submissions — structured legal arguments for or against a legal proposition
- Case notes — analysis and critique of a specific judgment
💡 Key distinction: Problem questions and essay questions require completely different approaches. Problem questions apply law to facts. Essay questions critically evaluate the law itself. Confusing the two is one of the most common reasons law students lose marks.
The IRAC Method
IRAC is the foundational framework for answering law problem questions. Every legal issue you identify should be addressed using this four-step structure:
For essay questions, a modified version — IDEA (Issue, Definition, Evaluation, Argument) — is often more appropriate. The key in both cases is structured, logical progression from one point to the next.
Essay Structure
A well-structured law essay signals clear legal thinking. Use this structure:
- Introduction (10%) — identify the legal issue, define key terms, outline your argument and signpost the structure
- Body (80%) — address each legal issue or argument in a separate paragraph or section, using case law and statute to support your analysis
- Conclusion (10%) — summarise your legal analysis, state your conclusion clearly and — where relevant — propose reform
For problem questions, work through each legal issue in the order they arise from the facts. For essay questions, organise by argument, not by topic — each paragraph should advance your overall thesis.
Using Case Law Effectively
Case law is the backbone of common law legal arguments. When using cases in your law essay:
- Cite accurately — always include the full citation: Donoghue v Stevenson [1932] AC 562
- State the ratio decidendi — the legal principle established by the case, not the facts
- Distinguish cases — explain why a case does or does not apply to your problem facts
- Show the hierarchy — Supreme Court and House of Lords cases carry the most authority; distinguish Court of Appeal and High Court decisions accordingly
- Critically evaluate — do not just cite cases; analyse whether they were correctly decided and what principles they establish
💡 Tip: The ratio decidendi (reason for the decision) is what matters legally — not the facts of the case. Many students waste words describing the facts of cases they cite. State the principle the case establishes and move on.
Using Statutes and Legislation
When referring to legislation in a UK law essay:
- Cite statutes accurately: Occupiers' Liability Act 1957, s 2(2)
- Apply the specific section, subsection and paragraph relevant to your problem
- Use statutory interpretation principles where the meaning is ambiguous — literal rule, golden rule, mischief rule, purposive approach
- Where relevant, refer to Hansard or Law Commission reports to support purposive interpretation
- For EU law questions, cite regulations and directives correctly and address their domestic effect
Legal Argument and Critical Analysis
Critical analysis in a law essay means going beyond stating what the law is to evaluating whether it is clear, consistent, fair, effective or in need of reform. At the highest level, law essays should:
- Identify tensions, ambiguities or inconsistencies in the law
- Evaluate competing academic arguments and judicial interpretations
- Consider policy arguments — why the law is as it is and whether it achieves its purpose
- Draw on academic commentary — law review articles, textbooks, Law Commission reports
- Propose and justify reform where the law is deficient
⚠️ Avoid: Describing the law without analysing it. "The law states X" followed by the next point is description. "The law states X, which has been criticised by scholars because Y, and which creates the anomalous result Z" is analysis.
OSCOLA Referencing
Most UK law schools use OSCOLA (Oxford University Standard for the Citation of Legal Authorities). Key OSCOLA rules:
- Cases: Caparo Industries plc v Dickman [1990] 2 AC 605 (HL)
- Statutes: Misrepresentation Act 1967, s 2(1)
- Journal articles: Andrew Burrows, 'We Do This at Common Law but That in Equity' (2002) 22 OJLS 1
- Books: William Twining and David Miers, How to Do Things with Rules (5th edn, CUP 2010)
- Footnotes not in-text — OSCOLA uses footnotes for citations, not in-text author-date references
- No full stop after citations — OSCOLA does not use full stops at the end of footnotes
See our guide comparing Harvard vs APA vs OSCOLA referencing for a full breakdown of when each style is used.
Common Mistakes in Law Essays
- Describing the law instead of analysing it — the most penalised mistake at every level
- Incorrect citation format — OSCOLA errors signal a lack of professional legal training
- Stating the facts of cases rather than the ratio — wastes words and misses the legal point
- Ignoring counterarguments — a one-sided legal essay will not achieve high marks
- Confusing problem and essay question approaches — applying IRAC to an essay question or writing discursively for a problem question
- Failing to conclude — every legal issue must have a conclusion, even if the law is uncertain
- Using non-legal sources — websites, Wikipedia and general news articles are not appropriate legal sources
FAQs
What is the difference between a problem question and an essay question in law?
A problem question presents a set of facts and asks you to advise the parties on their legal position — you apply the law to the facts using IRAC. An essay question asks you to critically discuss, evaluate or argue a legal proposition — you analyse the law itself rather than applying it to facts.
Do UK law essays use Harvard or OSCOLA referencing?
The vast majority of UK law schools use OSCOLA (Oxford University Standard for the Citation of Legal Authorities), which uses footnotes rather than in-text citations. Always check your institution's referencing guide — some programmes use Harvard for non-law modules.
How do I structure a law essay introduction?
A strong law essay introduction should: define the key legal concept or issue, outline the scope of your essay, state your central argument or thesis, and briefly signpost how the essay will develop. Avoid simply restating the question. Keep it to approximately 10% of your word count.
How long should a law essay be?
This depends entirely on your assignment brief — always follow the specified word count exactly, as law markers are typically strict about limits. Undergraduate law essays commonly range from 1,500 to 3,000 words; always check whether your word count includes or excludes footnotes.
Can I cite Wikipedia or websites in a law essay?
No. Wikipedia, general news articles and most websites are not acceptable legal sources. Your essay should be built on primary legal sources — case law and statutes — supported by academic commentary from law journals, textbooks and official reports such as those from the Law Commission.
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