Which OET sub-test is hardest to pass?
Not the one you score worst in. Across every regulator that publishes a grade, Speaking is where boards refuse to bend and Writing is where they bend most.
"Hardest" has two meanings and they give opposite answers. Candidates usually mean which sub-test do I score worst in — that varies by person. The more useful question is which sub-test is hardest to get past your regulator with, and that one has a single answer that holds across almost every board.
It is Speaking. And the sub-test regulators are most willing to accept below Grade B is Writing, which is where most candidates put their anxiety.
What the boards actually publish
OET publishes the organisations that accept the test. 131 healthcare regulators on that list publish a grade. Counting them one sub-test at a time — a board that publishes nothing for a given sub-test is left out of that row, so the rows do not all total the same:
| Sub-test | Require B or better | Accept below B |
|---|---|---|
| Speaking | 112 | 19 |
| Listening | 87 | 44 |
| Reading | 72 | 58 |
| Writing | 60 | 70 |
112 of them require Grade B or better in Speaking. 60 require it in Writing. That is not a small gap and it is not an accident: Speaking is the sub-test that most resembles the job, and a regulator deciding whether you can safely take a history has an obvious reason to hold it firm.
Grade B is 350–440 on the 0–500 scale. C+ is 300–340. The gap between them is one band, and for Writing it is the band 64 regulators are willing to give you.
Why this changes how you prepare
Most preparation plans are built around the sub-test that feels worst. That is the wrong input. Build it around the sub-test where a near miss costs you the whole sitting, and that is Speaking almost everywhere.
Two practical consequences:
A borderline Writing score is often survivable. A borderline Speaking score usually is not. If you are sitting at roughly C+ in both, the Writing result has a real chance of being accepted as it stands and the Speaking result does not. Check your own board before acting on that — it is a statement about most boards, not about yours.
Speaking is also the hardest sub-test to practise alone, which is why it ends up last. Reading and Listening have papers you can sit at a kitchen table. Writing has letters you can draft and compare against samples. Speaking needs an interlocutor who responds, and reading a role-play card silently to yourself trains none of what is being marked.
The result is a mismatch worth naming plainly: the sub-test with the least tolerance for a bad day is the one that gets the least rehearsal.
Things that cost nothing
Record both role-play cards to time and listen back. Most candidates discover they are running short rather than long, and that they are answering the patient rather than managing the conversation. Neither is visible from the inside.
Rehearse the openings specifically. Both role-plays begin with you establishing who you are and why you are there, and relationship-building is being marked from the first thirty seconds. It is also the most scriptable part of the test — the one place preparation converts directly into a score.
Read your own board's requirement rather than a forum's. Fewer than half of regulators require B in all four, and the ones that relax something usually relax Writing. What your regulator actually publishes is a two-minute check that regularly saves a re-sit.
The caveats that matter
These are counts across regulators, not a prediction about your result. A board that requires B in Speaking and C+ in Writing is not saying Speaking is harder — it is saying it cares more, which is a different claim with the same practical effect on you.
Some boards publish nothing at all. 12 of the 143 healthcare regulators on OET's list accept the test without stating a grade, and for those the only source is the board itself.
Compiled from OET's own list of recognising organisations, captured 2026-08-21 and re-scraped weekly. Confirm with your regulator before booking anything — thresholds move without announcement.
