IB Physics syllabus changes 2026: What is new and what has been removed
The IB Physics syllabus changes have significantly reshaped both the course content and the assessment structure students face today. The current syllabus is built around five compulsory themes, removes the old Options system and Paper 3, and brings topics such as Relativity, Astrophysics, and extended Thermodynamics into compulsory HL study. Changes have also been made to the Internal Assessment and the weighting of Paper 1 and Paper 2.
These updates directly affect how students should choose study materials, use older past papers, and prepare for exams from May 2025 onward.
- Why the IB Physics syllabus was restructured and when changes took effect
- Key content additions in the current IB Physics syllabus
- Content removed or significantly reduced in the current IB Physics syllabus
- How the internal assessment changed under the new IB Physics syllabus
- How syllabus changes in IB Physics affect available past papers and resources
- How to adapt your revision when older IB Physics past papers are used
- Frequently asked questions
Why the IB Physics syllabus was restructured and when changes took effect
The IBO syllabus update for Physics [1] was driven by a broader educational philosophy: Move away from memorization-heavy content delivery and toward conceptual understanding, real-world application, and scientific inquiry. The old curriculum had grown increasingly fragmented, with eight separate topics and four optional modules that created inconsistency across schools and exam cohorts.
The IB Physics 2023 update marked the official transition point. Students who began their two-year Diploma Programme course from August 2023 onward are assessed under this new framework, with the first examination session under the current syllabus taking place in May 2025. Any student sitting exams from May 2025 forward must align their preparation entirely with the new structure.
One critical detail often overlooked is that many online resources, commercially published revision guides, and even some school-issued textbooks still reflect the old syllabus. Using outdated materials without understanding how the curriculum has changed is one of the most avoidable mistakes a student can make in IB Physics.
>>> Read more: IB Physics books 2026: Complete guide for students and teachers
Key content additions in the current IB Physics syllabus
The IB Physics new syllabus reorganized the entire course into five compulsory conceptual themes, replacing the previous system of eight isolated topics. This is not simply a cosmetic rebrand. The internal logic of how concepts connect to each other has been fundamentally redesigned.
The five themes in the current curriculum are:
- Theme A: Space, Time and Motion
- Theme B: The Particulate Nature of Matter
- Theme C: Wave Behaviour
- Theme D: Fields
- Theme E: Nuclear and Quantum Physics
What makes the new content in IB Physics particularly demanding for Higher Level students is the integration of material that previously appeared only in the optional modules. Special Relativity and Rigid Body Mechanics, which were once confined to Option A, are now compulsory HL content within Theme A. Students can no longer avoid these areas by choosing a different option.
Astrophysics, specifically Stellar Evolution, has been embedded as core HL content within Theme E. Previously, only students who selected Option D: Astrophysics encountered this material in depth. Now it is a non-negotiable part of the HL assessment. Thermodynamics and Heat Engines have also been significantly expanded under Theme B for HL, reflecting a broader emphasis on energy systems across the physical world.
In our experience working with international students preparing for their first session under the new syllabus, the most common shock is the depth of thermodynamics content at HL. Students who assumed it would remain as surface-level as in the old core curriculum are at a significant disadvantage if they do not adjust their preparation early.
>>> Read more: IB Physics HL Mixed Practice Sets 2026: The Smart Way to Master Exam-Style Questions
Content removed or significantly reduced in the current IB Physics syllabus
Understanding removed topics in IB Physics is just as strategically important as knowing what was added. The most visible removal is the abolition of the Options system entirely.
The four old Options were:
- Option A: Relativity
- Option B: Engineering Physics
- Option C: Imaging
- Option D: Astrophysics
These modules gave students and schools a degree of flexibility in what content they prioritized. That flexibility no longer exists. The IB has decided that a consistent, coherent core experience is more important than customization.
Paper 3 has also been eliminated from the assessment structure. This was the paper where students previously demonstrated their data analysis skills and answered questions related to their chosen Option. Its removal is not a reduction in rigor. The skills it tested have been redistributed into a new component called Paper 1B, which will be discussed in the exam format section below.
A common mistake we see among students transitioning from older preparation resources is continuing to revise for topics that simply no longer exist in the assessed syllabus. Time spent on content from the old Options that has not been integrated into the new core themes is time that could be applied to mastering the actual assessed material.
>>> Read more: IB Physics HL Explain Questions : PEE Method for Long Answer Marks
How the internal assessment changed under the new IB Physics syllabus
The IA changes in IB Physics reflect the same shift in philosophy as the broader curriculum: Less rigid constraint, more emphasis on authentic scientific inquiry and communication quality.
Under the old syllabus, the Internal Assessment, formally called the Scientific Investigation, was capped at a maximum of 12 pages. This was a format-based restriction that many students found both arbitrary and difficult to manage when working with complex data sets or visual-heavy reports.
The new IA under the current IB Physics syllabus replaces the page limit with a word count cap of 3,000 words. This is a meaningful distinction. Figures, graphs, data tables, and images do not count toward the word limit, allowing students to present richer evidence without being penalized for thorough data visualization.
One critical detail often overlooked by students and even some school supervisors is that the assessment criteria themselves have also been realigned. The focus on personal engagement, exploration quality, and communication clarity has been sharpened. A superficially well-formatted report that lacks genuine scientific reasoning will score lower under the new criteria than a more direct but analytically rigorous investigation.
Drawing on years of experience at Times Edu supporting students through their IA submissions, the students who score highest are those who approach the investigation with a genuine question they want to answer, rather than working backward from a format they think examiners want to see.
How syllabus changes in IB Physics affect available past papers and resources
This is the section where many students and parents feel most uncertain, and for good reason. The IB Physics past papers from the old syllabus span many years and represent a rich resource for practice. However, the IB Physics current vs old syllabus comparison reveals that the two are structurally incompatible in several critical ways.
| Component | Old Syllabus | Current Syllabus |
|---|---|---|
| Paper 1 | Non-calculator MCQ only | Paper 1A (MCQ, calculator allowed) + Paper 1B (data analysis) |
| Paper 2 | Structured questions on core topics | Structured questions across all five themes |
| Paper 3 | Data analysis + Options questions | Removed entirely |
| Internal Assessment | Max 12 pages | Max 3,000 words |
| Weighting: Paper 1 | 20% | 36% (combined 1A and 1B) |
| Weighting: Paper 2 | 36% (SL and HL) | 44% |
| Weighting: Paper 3 | 24% (SL and HL) | Removed |
| Weighting: IA | 20% | 20% |
The shift in Paper 1 weighting from 20% to 36% is one of the most consequential changes for students who plan to rely heavily on past paper practice. The old Paper 1 carried relatively low stakes and tested recall without calculator support. The new Paper 1 is a significantly heavier contributor to the final grade and now includes Paper 1B, which tests the kind of data interpretation and experimental analysis skills previously tested in Paper 3.
Students using old IB Physics past papers without this context may underestimate Paper 1 in their practice schedule, allocating insufficient preparation time for what is now the single highest-weighted component.
How to adapt your revision when older IB Physics past papers are used
Old past papers are not useless. Used correctly, with a clear understanding of IB Physics past papers and the old and new syllabus relationship, they remain one of the strongest tools available for building problem-solving speed and conceptual fluency.
Here is a practical framework for adapting revision with older materials:
Step 1: Audit the topic alignment first.
Before attempting any old paper, map each question to the new five-theme structure. Questions from the old Topics 1 through 8 that correspond to Themes A through E in the current syllabus are directly usable. Questions from the old Options that have been integrated into the new core (Relativity, Astrophysics, Thermodynamics) are also usable for HL students, with some care around terminology differences.
Step 2: Skip Option-specific questions that have no current equivalent.
Old questions from Option C: Imaging, for example, have no parallel in the current syllabus. Practicing these questions does not build relevant exam skill.
Step 3: Practice old Paper 2 questions extensively.
The structured question format in Paper 2 has remained more consistent across the transition than any other component. Old Paper 2 questions on mechanics, fields, waves, and thermodynamics are excellent preparation for the current Paper 2.
Step 4: Use old Paper 3 Section A for Paper 1B skill-building.
The data analysis section of old Paper 3 (before the Options began) translates well to the style of reasoning tested in the new Paper 1B. The question format is similar, and the underlying skills are the same.
Step 5: Do not use old Paper 1 to simulate current Paper 1A conditions.
Old Paper 1 was strictly non-calculator. Current Paper 1A allows both a calculator and the Data Booklet. Practicing without these tools, under old exam conditions, builds habits that actively work against performance in the current format.
In our experience working with international students across the May 2025 and November 2025 examination cohorts, those who structured their past paper practice using this kind of mapping approach performed significantly more consistently than those who used older papers without filtering.
Frequently asked questions
When did the current IB Physics syllabus come into effect?
What are the biggest changes between the old and new IB Physics syllabus?
Are older IB Physics past papers still useful under the current syllabus?
How has the internal assessment changed in the new IB Physics syllabus?
Which topics were added to IB Physics in the most recent syllabus update?
Which topics were removed from IB Physics in the most recent update?
How do the syllabus changes affect students sitting IB Physics exams now?
Conclusion
At Times Edu, our consultants work directly with students on this kind of strategic alignment: Mapping available resources to the current syllabus, identifying preparation gaps before they become exam-day problems, and building a revision plan that reflects how the new assessment actually awards marks. If you or your child is preparing for IB Physics under the current syllabus and wants a personalized academic roadmap, speaking with one of our specialists is the most efficient first step you can take.
