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  1. Subjects
  2. Philosophy
  3. Assessment

How IB Philosophy is assessed

Every paper and piece of coursework for Philosophy, with its time, marks and share of the grade at each level, then the grade boundaries the IB set for recent sessions.

Philosophy SL papers and coursework

2 exams, 2 h 45 min in total, internal assessment 25% of the grade. The weight is each part’s share of your final grade.

ComponentTimeMarksWeight
Paper 1No calculator

1 h 45 min · 50 marks

One of two stimulus-based questions on the core theme, and one essay on your optional theme.

1 h 45 min5050%
Paper 2No calculator

1 h · 25 marks

One two-part question on your prescribed text. Open book: you bring a clean, unannotated copy of the text.

1 h2525%
Philosophical analysisInternal

Coursework · 25 marks

A philosophical analysis of a non-philosophical stimulus you choose, up to 2,000 words. Marked by your teacher and moderated by the IB.

Coursework2525%

The internal assessment at SL

Philosophical analysis, 25% of the grade, marked out of 25. A philosophical analysis of a non-philosophical stimulus you choose, up to 2,000 words. Marked by your teacher and moderated by the IB.

SL grade boundaries

The lowest overall percentage for each grade. The IB sets them after every session, sometimes per timezone, so treat them as a guide to the standard, not a promise.

GradeMay 2025November 2025
TZ2TZ3All
779–100%79–100%80–100%
667–78%67–78%65–79%
556–66%54–66%49–64%
444–55%42–53%34–48%
328–43%30–41%22–33%
214–27%15–29%10–21%
10–13%0–14%0–9%

Philosophy HL papers and coursework

3 exams, 4 h 45 min in total, internal assessment 20% of the grade. The weight is each part’s share of your final grade.

ComponentTimeMarksWeight
Paper 1No calculator

2 h 30 min · 75 marks

One of two stimulus-based questions on the core theme, and two essays on your optional themes.

2 h 30 min7540%
Paper 2No calculator

1 h · 25 marks

One two-part question on your prescribed text. Open book: you bring a clean, unannotated copy of the text.

1 h2520%
Paper 3No calculator

1 h 15 min · 25 marks

A two-part question on an unseen text about philosophy and technology or philosophy and the environment.

1 h 15 min2520%
Philosophical analysisInternal

Coursework · 25 marks

A philosophical analysis of a non-philosophical stimulus you choose, up to 2,000 words. Marked by your teacher and moderated by the IB.

Coursework2520%

The internal assessment at HL

Philosophical analysis, 20% of the grade, marked out of 25. A philosophical analysis of a non-philosophical stimulus you choose, up to 2,000 words. Marked by your teacher and moderated by the IB.

HL grade boundaries

The lowest overall percentage for each grade. The IB sets them after every session, sometimes per timezone, so treat them as a guide to the standard, not a promise.

GradeMay 2025November 2025
TZ2TZ3All
777–100%80–100%79–100%
666–76%68–79%65–78%
554–65%55–67%51–64%
442–53%43–54%38–50%
329–41%31–42%22–37%
215–28%15–30%11–21%
10–14%0–14%0–10%

Preparing for each paper

Each paper rewards practice under its own conditions: its length, its calculator rule, the kind of answer it wants. Read the paper descriptions above, then practice with the clock running, using the past papers your school gives you.

Augment has nothing to practice for Philosophy yet. The syllabus on the subject page is the list of what the exams can ask about.

Where this comes from

The assessment and boundaries on this page come from the IB’s own documents. Check them there before your exams.
  • IB Philosophy (opens in a new tab)The IB’s page for the course
  • Philosophy subject brief (opens in a new tab)Syllabus and assessment, first assessment 2025 (PDF)
  • Philosophy guide (opens in a new tab)The full subject guide, first assessment 2025 (PDF)
  • Understanding DP assessment (opens in a new tab)How exams are marked and grade boundaries set

Keep going

  • Grade calculatorYour Diploma points from six grades and the core, or a subject grade from marks.
  • Grade boundariesRecent boundaries for every subject we have them for.
  • IB PhilosophyThe Philosophy syllabus topic by topic, and what Augment has for it.

Keep Philosophy beside your other subjects

A free account keeps your six subjects and levels in one place.

Start freeOpen Philosophy in Augment