How to Write an Extended Essay Conclusion

Learn what a strong IB Extended Essay conclusion covers, the common mistakes to avoid, and the arc test that checks your argument holds together.

Your conclusion is the last thing an examiner reads. It should leave them satisfied that you've answered your research question with evidence and insight — not feeling like you ran out of steam.

What a Strong Conclusion Covers

A complete conclusion gives a direct answer to your research question, briefly draws together your strongest evidence, acknowledges the limitations of your study honestly, and points to where future research could go next. The aim is to synthesise — not to repeat what you've already said.

Common Mistakes

The most common mistake is restating your introduction. Your conclusion should synthesise, not repeat. It should feel like the destination your essay has been building toward.

  1. Don't introduce new evidence or arguments
  2. Don't apologise for your limitations — state them professionally
  3. Don't end with a vague statement like "More research is needed"
  4. Don't exceed 400 words — keep it tight

The Arc Test

If someone read only your introduction and conclusion, they should understand the full arc of your essay. Test this: give a friend just those two sections and see if they follow your argument.

Key takeaways

  • Give a direct answer, draw together evidence, state limitations, point forward
  • Synthesise, don't repeat your introduction
  • Keep it under 400 words
  • Pass the arc test: intro + conclusion should tell your full story
EE

The Extended Essay Academy

Built from a real 32/34 IB Extended Essay

Read the course, free

The first five lessons are open — no account needed. Start with lesson 1 and follow one real essay from research question to final draft.

Start lesson 1 →