TSA vs TARA: what changed for Oxford & UCL applicants

TARA is not the TSA with a new name stuck on the cover, and it is not a completely different test either. It sits precisely in between.

Direct comparison of TARA's own official Question Guide against the old Cambridge TSA Question Guide shows that the two tests use the identical seven named Critical Thinking question types and the identical three named Problem Solving question types, with a maths appendix that covers almost exactly the same ground.

That's the part every competitor summary tends to either miss or oversimplify.

What changed is the administration, not the skill being tested. TSA put fifty questions in front of you in a single ninety-minute sitting, mixed together.

TARA splits the same two skills into two separate, independently timed modules of twenty-two questions and forty minutes each. If you have old TSA question-type practice, it is still directly useful.

If you have old TSA timed practice — the experience of pacing yourself through fifty mixed questions in ninety minutes — that specific rehearsal no longer matches how the real test is run, and practicing the old rhythm could actively work against you.

UAT-UK, the organisation that now administers TARA, confirms this module structure directly on its official TARA test page — timing, scoring scale, and how each module is used.

We walk through the same information end to end, alongside course lists and dates for both universities, in our TARA format and timing guide.

The Thinking Skills Assessment was published by Cambridge Assessment Admissions Testing, part of the University of Cambridge (© UCLES).

For years it was the test Oxford used for a range of courses where raw subject knowledge wasn't the main thing being assessed — where the university wanted a read on how an applicant reasons, independent of which A-levels they'd taken.

Oxford's own admissions guidance today confirms TARA has taken that role for the same kind of reasoning-based courses — see Oxford's official admissions tests page and our breakdown of the seven Oxford courses that require it now.

Standard TSA was a single sitting: fifty multiple-choice questions in ninety minutes, twenty-five Problem Solving and twenty-five Critical Thinking, interspersed rather than grouped, and presented roughly in order of difficulty.

TSA Oxford — the version used specifically for Oxford admissions — added an optional thirty-minute writing task on top, offering a choice of four prompts for most courses.

TSA was used through 2025 and then discontinued, superseded by TARA for 2026/27 entry at both Oxford and UCL.

Cambridge Assessment Admissions Testing confirmed the wind-down of its own admissions-testing operation in its official closure notice, which states that STEP moved to OCR and TMUA/ESAT moved to UAT-UK — though its own wording on TSA specifically is vaguer, saying only that "other arrangements are being made" for its delivery, so it's Oxford's guidance above, not this notice, that's the stronger source for TSA's actual replacement.

If you haven't seen the full picture of what replaced it — the three-module format, scoring, dates and cost for both universities — our complete TARA test guide covers all of it in one place.

This is the comparison most "TARA is the new TSA" summaries skip past.

The table below is built from a direct read of both official guides — the TSA Question Guide (Cambridge Assessment Admissions Testing) and the TARA Question Guide and Content Specification (UAT-UK) — not from a competitor's paraphrase of either.

Here's how that breaks down:

"Identical" rows above are the parts verified word-for-word against both official guides. Everything else in the table is an administrative or logistical difference — that distinction is the whole point of this page.

If you want to see what a 22-question, 40-minute module actually feels like rather than just reading the numbers, you can start working through the practice bank free before deciding whether to go further.

This is worth sitting with, because it's the single most useful fact in this entire comparison.

TARA's Critical Thinking module tests the same seven things TSA's did, under the same seven names:

Identifying the Main Conclusion, Drawing a Conclusion, Identifying an Assumption, Assessing the Impact of Additional Evidence, Detecting Reasoning Errors, Matching Arguments, and Applying Principles.

TARA's Problem Solving module tests the same three things under the same three names:

Relevant Selection, Finding Procedures, and Identifying Similarity.

This isn't a vague family resemblance. It's a direct match between two official documents, produced by two different organisations, six-plus years apart.

The maths appendix underneath Problem Solving reads almost like the same document was carried forward:

TARA's own guide describes it as near-identical to TSA's in both topic coverage and worked-example teaching style.

TARA's version covers simple fractions, place value, percentages, the four rules of number, calculating an average, time/money/measures, metric unit conversions only (no imperial units), and reading graphs, charts and tables.

Practically, this means the skill you were building if you ever worked through TSA Critical Thinking or Problem Solving material — spotting an unstated assumption, telling a conclusion apart from the reasons supporting it, matching an argument's underlying logical structure regardless of topic — is the exact skill TARA now examines.

None of that work was wasted.

We go through all seven Critical Thinking types in full, with worked examples, in our TARA Critical Thinking guide, and the same is true on the numerical side — Relevant Selection, Finding Procedures and Identifying Similarity carried across unchanged too, and we work through all three Problem Solving question types with real bank questions in their own guide.

Here is where a rushed "TARA is just TSA with a new name" take goes wrong, and where it actually matters for how you prepare.

One sitting became two modules

TSA asked you to sit fifty questions, twenty-five Problem Solving and twenty-five Critical Thinking, mixed together and presented roughly in order of difficulty, inside a single ninety-minute block.

That meant constantly switching mental gears — reasoning through an argument passage, then immediately switching to a numerical estimation problem, then back again — while managing one shared clock across both skill areas.

TARA separates the two entirely. Critical Thinking is its own 40-minute, 22-question module.

Problem Solving is its own 40-minute, 22-question module. You take them in a fixed order, with no going back once a module ends.

There's no gear-switching mid-module, and no shared clock to manage between the two skill areas — but there are two separate clocks to manage instead, and two separate points where a slow start can eat into the time you have left.

The pacing arithmetic is different

Under TSA, fifty questions in ninety minutes worked out to roughly 1 minute 48 seconds per question, averaged across two intermingled skill types.

Under TARA, twenty-two questions in forty minutes works out to just under 1 minute 50 seconds per question — but that figure now applies separately, within a single skill area, rather than as a blended average across two.

A candidate who was well-drilled at shifting quickly between Problem Solving and Critical Thinking mid-block, a genuinely useful TSA skill, no longer needs that particular skill in the same way, because the modules never interleave.

The writing task lost a prompt, and gained a compulsory slot

TSA Oxford's writing task was optional for most courses, thirty minutes long, with a choice of four prompts. TARA's Writing Task is the third module every candidate sits, forty minutes long, with a choice of three prompts and a 750-word cap.

It isn't separately marked — a copy is simply sent to each university you've applied to — but it is no longer something you can choose to skip. If your old TSA prep treated the writing task as optional or secondary, that assumption doesn't carry over.

We cover the exact three-part structure every prompt follows, plus the official planning guidance and a timing budget for the 40 minutes, in our Writing Task guide.

Here's what that looks like:

If you, or your school, still have TSA practice papers sitting in a folder somewhere, here's the honest breakdown of what's still worth your time and what isn't.

The practical fix is straightforward: keep using old TSA question-type material for learning the reasoning patterns, and replace old TSA timed mocks with TARA-paced practice — 22 questions, 40 minutes, one module at a time.

That's the specific gap our practice platform is built to close: your TSA-era question-type knowledge still applies, but you need TARA-paced practice, not TSA-paced practice, to walk into the real thing with accurate instincts about the clock.

One more reason the module split matters: because Critical Thinking and Problem Solving are now timed and scored as fully separate 40-minute blocks, it's entirely possible to pace one module well and the other poorly — worth knowing before you see how the two scores are reported individually in our TARA scoring guide.

If you'd rather try the format than just read about it, our free TARA practice questions are built to the real 22-question, 40-minute shape — register free and feel the difference for yourself.

The guide reviewed for this comparison is specifically TSA Oxford — the version of TSA used for Oxford admissions, with its optional writing task. That's the version this page compares against TARA.

Oxford required TSA for a number of its courses for years before the switch.

TARA has a wider reach than TSA did in that respect.

Oxford requires TARA for seven courses:

Economics and Management; History and Economics; History and Politics; Human Sciences; Philosophy, Politics and Economics; Psychology (Experimental); and Psychology, Philosophy and Linguistics.

UCL requires TARA for eleven courses, spanning both social sciences (Sociology, Social Sciences, European Social and Political Studies, and related programmes) and engineering and computing (Computer Science, Computer Science & Mathematics, Mechanical Engineering, Robotics and Artificial Intelligence, Management Science) — a considerably broader academic spread than Oxford's more humanities-and-social-science-weighted list.

UCL confirms the full list directly on its own tests, tasks and interviews page — including a dedicated page for its Computer Science courses — and we go through all eleven, plus why Mechanical Engineering is a new addition to that list this cycle, in our dedicated UCL guide.

Timing also differs by university, and this is easy to miss if you assume Oxford and UCL run TARA identically. Oxford candidates must sit TARA in the October 2026 window only — there is no January option for Oxford applicants.

UCL applicants can choose either the October 2026 sitting or the January 2027 sitting.

For the full picture on each university, see our dedicated guides to TARA at Oxford, including exactly why there's no January option, and TARA at UCL, including how to choose between UCL's two sittings.

TSA becoming TARA is not an isolated change.

It's one piece of a much larger reshuffle of Oxford's in-house admissions testing, all landing around the same admissions cycle, which is part of why the TSA-to-TARA transition can look confusing from the outside if you only look at one test at a time.

Separately from the TARA switch, Oxford discontinued eight of its own in-house admissions tests for 2027 entry (meaning from the 2026 sitting onward). The Mathematics Admissions Test (MAT) was replaced by the Test of Mathematics for University Admission (TMUA).

The Physics Admissions Test (PAT) and the Biomedical Sciences Admissions Test (BMSAT) were both replaced by a single new test, the Engineering & Science Admissions Test (ESAT).

The Classics Admissions Test, the Modern Languages Admissions Test, the Ancient History and Classical Archaeology Admissions Test, and the Philosophy Admissions Test were all dropped outright, with no replacement test introduced for any of them.

Oxford's tests for medicine (UCAT) and law (LNAT) continue unchanged.

There's a related but separate story around the Biomedical Admissions Test (BMAT), which isn't part of the TSA/TARA lineage but shows the same pattern:

BMAT's final sitting was autumn 2023, after which Cambridge Assessment Admissions Testing stopped producing new papers for it.

The seven universities that had used BMAT — Imperial College London, Oxford, Cambridge, Lancaster, Brighton and Sussex Medical School, UCL, and Leeds — all moved their medicine and related admissions to the UCAT from 2025-entry applicants onward.

If you're trying to keep TARA, TSA and BMAT straight in your head at once, our three-way TARA vs TSA vs BMAT comparison lays out all three side by side.

UCL's involvement is worth being precise about too. UCL joined the same UAT-UK testing partnership as Oxford in 2025, adopting both TARA and TMUA for the courses that require them.

For at least one UCL course — Mechanical Engineering — UCL's own course page describes the TARA requirement as new for the 2027 cycle, which is a useful data point if you're trying to work out whether a given course has always tested for this or has just started doing so.