How to Write an Extended Essay: IB Format Structure and Requirements

What Is an Extended Essay?

The Extended Essay is the only component of the IB Diploma where you define the question yourself. Unlike exams or internal assessments where the task is given to you the EE requires you to identify a genuine gap or problem within a subject and build an original argument around it.

Think of it as a condensed undergraduate thesis. The research question must be investigable, meaning it invites analysis rather than a factual answer, and your essay must sustain a coherent argument across its full length, not just summarise what you found.

Your EE must be registered under one of these groups, and your research question must fit meaningfully within the subject's academic conventions. A history EE and a biology EE are assessed using the same five criteria, but require completely different methodological approaches.

IB Extended Essay Points and Grade Boundaries

The IB Extended Essay is worth up to 34 points across five criteria and contributes up to 3 bonus points toward your final IB Diploma score when combined with your TOK grade.

Beyond the points, universities, particularly in the UK, treat the EE as evidence of independent research ability at a level above standard coursework. Because it's self-directed and externally marked, it carries more weight in admissions conversations than internal assessments. Students who write strong EEs in a subject relevant to their intended degree frequently reference them in personal statements and interviews as evidence of genuine academic interest rather than just curriculum compliance.

The EE contributes up to 3 bonus points toward your Diploma and an E grade results in automatic failure regardless of your other scores. Still staring at a blank document? Tell us your research question, subject area, and deadline, and our extended essay writing service can handle the research, drafting, and formatting and return a complete IB-structured essay ready for your supervisor review.

How to Write an Extended Essay

Writing an IB Extended Essay follows seven steps: choosing a research question, conducting background research, developing your thesis and outline, writing the introduction, writing the body, writing the conclusion, and revising the final draft.

How to Choose an Extended Essay Topic and Research Question

Choose your extended essay topic from a subject you have already studied in school because the research challenge is difficult enough without learning an unfamiliar discipline at the same time.

The most common EE mistake is a research question too broad to argue within 4000 words. Pick something specific enough to actually investigate rather than just summarise.

Before committing, verify that enough credible sources exist. A research question with five available academic sources is a research question you cannot answer adequately.

When you have a draft question, check if it fits cleanly into one of the six DP subject groups. If it sits ambiguously between two groups, resolve that ambiguity with your supervisor before proceeding. The subject group shapes the methodology the examiner expects to see.

How to Research for Your Extended Essay

Start your research before you write or outline anything because the quality of your argument depends entirely on the strength of your sources.

• Start with general sources: textbooks, subject-specific encyclopedias, and summary articles that give you the conceptual landscape. Then move to academic sources, such as Google Scholar, JSTOR, and your school's library database, for the primary evidence and expert debate your argument needs.
• Take structured notes from the beginning. Record the full citation details of every source immediately: author, title, publication year, publisher, page numbers, and URL if applicable. Losing track of a source mid-draft and spending hours reconstructing it is avoidable.
• As you research, notice where the evidence is pulling you. If your findings are consistently challenging your original hypothesis, that's not a problem. It's often better material for an analytical argument than evidence that simply confirms what you expected.

How to Develop Your Extended Essay Thesis and Outline

Your thesis is the direct answer to your research question and your outline is the structure that organizes the argument supporting it. Both need to be in place before you write a single word of the essay itself.

Once you have a thesis, build your extended essay outline around three parts: an introduction that establishes context and states your research question and thesis; body paragraphs grouped by argument or theme, each building on the last; and a conclusion that summarises your findings and reflects on their significance without introducing new material.

How to Write an Extended Essay Introduction

The introduction does four things: provides a brief context on the topic, states your research question explicitly, presents your thesis, and signals how the essay is structured. It should be approximately 8 to 10 percent of your total word count, around 300 to 400 words for a 4,000-word essay.

The introduction is also where examiners form their first impression of your analytical ability. A clear, focused, jargon-free introduction signals that you understand what you're arguing and why it matters. A vague or overlong introduction signals the opposite.

How to Write the Body of Your Extended Essay

Write each body paragraph by opening with a topic sentence that connects to your thesis, presenting your evidence, and then explaining explicitly how that evidence supports your argument.

• The explanation is the analytical work. Summarising what a source says without connecting it to your thesis is description, not analysis, and examiners penalize description heavily under Criterion C.
• Organize body sections logically. Depending on your subject, that might mean chronologically, thematically, by type of evidence, or by sub-question. Whatever structure you choose, make the logic visible. A reader should be able to follow the progression of your argument without having to guess at your organizing principle.
• Transitions between sections should do more than signal a topic shift. They should show the relationship between what came before and what comes next: "Having established X, the following section examines how Y complicates that picture."

CollegeEssay.org's IB specialists review hundreds of Extended Essay drafts each year and find that body paragraphs which open with a clear topic sentence and close with explicit analysis consistently score higher on Criterion C than those that present evidence without connecting it back to the thesis.

How to Write an Extended Essay Conclusion

The conclusion answers the research question directly, summarises the evidence that led you there, and reflects on the significance and limitations of your findings. It should not introduce new arguments or new evidence.

Be precise about what your findings actually show. Overclaiming, meaning asserting that your essay has "proven" a broad point, weakens the conclusion. Underclaiming, meaning hedging so heavily that your conclusion says nothing, is equally damaging. State clearly what your research question asked, what your investigation found, and what those findings mean within the limits of your study.

How to Revise and Finalize Your Extended Essay

Revision should check argument structure before line editing. Confirm each body section connects to the thesis and the conclusion answers the research question before touching anything for style.

Check the argument first, line editing second. Ask: Does each body section connect to the thesis? Is the evidence sufficient for the claims being made? Does the conclusion answer the research question? Fix structural problems before polishing sentences. Rewriting a well-edited paragraph you later cut is wasted time.

Read the final draft aloud once. Sentences that work on the page often reveal themselves as unclear or clunky when spoken.

You've got the framework and the steps. What's left is the 4,000 words. If you'd rather not spend the next several weeks writing and revising alone, tell us your research question, your IB subject, and when it's due, and we can write your extended essay for you, formatted to IB standards and ready for your supervisor's first review.

Extended Essay Format Requirements

The IB Extended Essay must be written in 12pt Times New Roman or Arial, double-spaced throughout the body, with 1 inch margins on all sides and page numbers in the header or footer from the title page onward.

• Font and size: Times New Roman or Arial, 12pt. No decorative fonts.
• Line spacing: Double-spaced throughout the body. Single spacing is acceptable for footnotes and the bibliography.
• Margins: 1 inch (2.54 cm) on all sides.
• Page numbers: Required. Placed in the header or footer, starting from the title page.

Title Page

The title page must include the essay title, the research question, the IB subject group, your candidate number, the examination session, and the word count. Your name and school name are not included because EEs are marked anonymously.

Do not include your school's name, your supervisor's name, or any decorative elements. Keep the title page clean and factual.

Table of Contents

The table of contents lists every section and subsection in the essay with corresponding page numbers. It appears after the title page and before the introduction. It is not counted in the word count.

Section titles in the table of contents must match the headings in the body of the essay exactly.

Citation Styles

IB does not mandate a single citation style, but it requires consistency throughout the essay. The three most common styles used in EEs are:

• APA: standard in the social sciences, including psychology, economics, and environmental systems.
• MLA: standard in language and literature essays.
• Chicago: common in history EEs, particularly for footnote-style citation.

Whichever citation style you choose, apply it consistently to every in-text citation and every entry in your bibliography. Inconsistent citation is flagged under Criterion D and costs points that are straightforward to protect.

Failing to cite sources is plagiarism. IB takes academic honesty violations seriously. In severe cases, the result is disqualification from the Diploma.

Extended Essay Grading Criteria and Boundaries

The IB Extended Essay is graded by an external examiner against five criteria for a maximum of 34 points and a final letter grade from A to E.

The Five Criteria of an Extended Essay

The five criteria of an extended essay are Focus and Method (6 points) Knowledge and Understanding (6 points) Critical Thinking (12 points) Presentation (4 points) and Engagement (6 points) for a maximum of 34 points.

• Criterion A: Focus and Method (6 points) The research question is clearly stated, focused, and appropriate for the subject. The approach to investigation is logical and well-chosen.
• Criterion B: Knowledge and Understanding (6 points) The essay demonstrates understanding of the topic and the subject area. Relevant concepts, theories, and academic context are correctly applied.
• Criterion C: Critical Thinking (12 points) This is the highest-weighted criterion and the one most students underperform on. Examiners are looking for genuine analysis and evaluation, not summary. Evidence must be interpreted, sources must be evaluated, and your argument must show independent thinking throughout.
• Criterion D: Presentation (4 points) The essay is correctly structured, formatted, and cited. The title page, table of contents, bibliography, and overall layout meet IB standards.
• Criterion E: Engagement (6 points) Assessed through your Reflections on Planning and Progress (RPPF), which is the formal record of your supervisor meetings. This criterion is not assessed from the essay itself.

Grade Boundaries of an Extended Essay

In an extended essay an A grade requires 25 to 34 points and an E grade results in automatic failure of the IB Diploma regardless of your scores in any other subject.

Conclusion

You now know what IB examiners are looking for and how the 34 points break down. Knowing the rubric and writing an essay that scores well against it are two different things, especially at 4,000 words on a topic that needs genuine independent research.  CollegeEssay.org's extended essay specialists work with IB students specifically. ive them your research question, your subject group, and your deadline, and they'll return a structured, examiner-ready draft.