IB Grade Boundaries 2026: Everything Students Need to Know.

What Are IB Grade Boundaries and How They Actually Work:

A student can score 68% one year and get a 7. Another year, that same 68% only gets a 6. If that seems unfair, it's because most people assume the IB works like a fixed percentage scale it doesn't. Understanding grade boundaries clears up a lot of the confusion (and a fair bit of the panic) that shows up every results day.

What a grade boundary actually is:

A grade boundary is the raw mark cutoff between one grade and the next, in a specific subject, at a specific level, in a specific exam session. So Chemistry HL in May has its own set of boundaries. Chemistry HL in November has a different set. Psychology SL has its own too. There's no single table that covers everything, because the boundaries aren't fixed in advance they're set after the marking is done.

This is the part that trips people up if they're used to A-Levels, where boards like AQA publish one set of boundaries the whole country uses. The IB does something closer to a moving target on purpose: it wants a grade 7 to mean the same thing globally, year after year, even if one year's exam paper happened to be brutal and another year's was gentler.

Why boundaries move around:

Once marking wraps up, senior examiners hold what's called a Grade Award meeting. They're not just crunching numbers they actually sit down and read scripts at the proposed cutoff marks and check whether that work matches the grade descriptors for a 6 versus a 7, for example. Two things feed into the decision:

How the cohort performed compared to previous years, statistically. And whether, on inspection, the actual quality of work at a given mark still looks like a 7 should look.

If a paper turns out to be unusually hard, the boundary for each grade tends to drop, so students aren't punished for a rough exam. If it was easier than expected, boundaries climb. Strong IA scores can also cushion a subject grade a bit if the external exam went sideways. None of this is a strict formula it's closer to expert judgment backed by data.

The upshot: don't trust last year's percentages as a target for this year. A student aiming for "70% and I'll get my 7" based on an older boundary sheet could end up disappointed, or pleasantly surprised, depending on how that session's papers landed.

Dates that matter for 2026:

May 2026 exams ran from April 24 to May 20. You can view the full breakdown in our IB DP Exam Schedule 2026: May and November Dates, Timetable, and Planning Guide. Results reached students on July 6, with schools getting access a day early on July 5. Coordinators usually get the full subject-by-subject boundary breakdown about a day after results go live to students.

For the November session, exams run October 23 to November 13, with results and boundaries expected in early January 2027.

Worth flagging for anyone sitting exams later this year: the IB has started piloting digital exams for a handful of subjects, starting with Language A and Language B. Same grading standards apply either way going digital doesn't change how boundaries get set.

Why you can't just Google the official numbers:

The IB doesn't publish a public boundary table the way UK exam boards do. Boundaries go out to schools and coordinators through the results portal and subject reports, and how much detail a student sees scaled marks, how close they were to the next grade up is largely up to the coordinator. That's also useful info if you're weighing whether an Enquiry upon Results remark is worth the fee.

Because that data isn't freely available, a small industry of tutoring sites and grade calculators has grown up around scraping and archiving old boundaries, which is honestly the only reason students have any historical reference point at all.

Rough patterns worth knowing:

Nobody can tell you the exact 2026 numbers before they're released anyone claiming otherwise is guessing. But a few things hold up fairly consistently across sessions:

A 7 usually sits somewhere around 75–85% of raw marks, though there are real exceptions on both ends. Math is a good example of why "just study for 75%" doesn't quite work: Applications & Interpretation HL has historically needed a lower score for a 7 than Analysis & Approaches HL, not because the course is easier, but because students tend to score worse on it relative to the difficulty.

Physics HL is the classic case people bring up a 7 has sometimes needed only around 67-68%, because the papers are genuinely hard to rack up marks on. English, on the other hand, often sits in the low-to-mid 90s for a 7, since the assessment is more subjective and examiners hold that line tightly.

November sessions tend to run a touch higher than May and Timezone 2 (Europe, Africa, Asia-Pacific) is often slightly higher than Timezone 1 (the Americas), simply because different papers are used to keep exam content secure across time zones.

What to actually do with this information:

Don't chase a number. Chasing "I need 70% for a 7" is a trap, because that number shifts. Study the syllabus properly and build exam technique instead that's what actually protects you against a harder-than-usual paper.

If you want a useful reference point, look at a subject's boundary history across several sessions rather than fixating on last year alone. That tells you more about how volatile that particular subject tends to be.

Lean on your IA where you can it's one of the only parts of your grade you have full control over ahead of time, and it can offset a weaker performance elsewhere.

And if your results come back close to a boundary, talk to your coordinator about whether an EUR remark makes sense. It's not free, and grades can technically move down as well as up on a re-mark, so it's worth a real conversation rather than a reflexive request.

Where the real numbers actually live:

Once results are out, the official boundary data sits in a few places: the IB candidate portal, which can show your scaled mark and how far off the next grade you were (again, coordinator's call how much you see) your school's DP or CP coordinator, who gets the full breakdown directly from the IB; and IB subject reports, published a few months after each session, which sometimes explain the reasoning behind where a boundary landed.

If you're advising students or building study resources around this, the honest answer is that anything claiming to have "official 2026 boundaries" before results day is either guessing or reusing old data. The more useful thing to offer is context how boundaries actually get set, and what past sessions suggest about a given subject rather than a fake table of numbers.