TISC explained

TISC, the Tertiary Institutions Service Centre, is the body that scales WACE course scores, calculates the ATAR and manages university applications for Western Australia. SCSA sets and assesses the courses and awards the WACE; TISC then scales those results, adds your best four into a Tertiary Entrance Aggregate, and ranks it into an ATAR. TISC and SCSA are different bodies with different jobs.

What is TISC?

TISC stands for the Tertiary Institutions Service Centre. It is the organisation that processes tertiary admissions for Western Australia’s public universities, and it is the body that calculates the ATAR for WA students.

In most states there is a central admissions centre that turns senior-school results into a university rank. In WA, that centre is TISC. It sits between your WACE results and your university offer.

So when WA students ask who works out their ATAR and where their university offers come from, the answer to both is TISC.

What does TISC do?

TISC has two main jobs. First, it takes your WACE course results, scales them, and calculates your ATAR. Second, it manages the university application and offer process for WA’s participating universities.

On the ATAR side, TISC scales each of your ATAR course scores, adds your best four into an aggregate, and ranks that aggregate into an ATAR. On the applications side, it collects your course preferences and makes offers on behalf of the universities.

So TISC is both the calculator of your rank and the gateway to your offers. Understanding it helps you see how your results become a place at university.

TISC vs SCSA: what is the difference?

Students often confuse TISC with SCSA, but they do different things. SCSA, the School Curriculum and Standards Authority, sets the WACE courses, runs the exams, marks them, and awards the WACE certificate.

TISC comes after. It takes the course results that SCSA produces, scales them, and turns them into an ATAR, then handles university applications. In short: SCSA runs the courses and exams; TISC turns the results into an ATAR and an offer.

So the two bodies are a relay. SCSA hands over your marked results, and TISC converts them into the rank universities use. They are separate organisations with separate roles.

How TISC scales your results

TISC scales each ATAR course score so that a score in one course is comparable to a score in another. Scaling reflects how strong the students taking a course are across all their courses, not how hard the course feels.

A course scales up when its students are strong across the board, and down when the cohort is broad. This keeps the ATAR fair, so your rank does not depend on which courses you happened to choose. See how scaling works.

The result is a scaled score for each of your courses. Those scaled scores, not your raw marks, are what TISC uses to build your ATAR.

The Tertiary Entrance Aggregate

Once your courses are scaled, TISC adds your best four scaled scores together. This total is called the Tertiary Entrance Aggregate, or TEA. It is the number that sits directly behind your ATAR.

Because only your best four count, you are not penalised for taking a fifth or sixth course. TISC simply uses the four that work most in your favour, which gives you room to attempt more courses without risk.

Your TEA captures your strongest four scaled results. The higher your TEA, the higher your ATAR, since the ATAR is essentially your TEA expressed as a rank.

From TEA to ATAR

The final step is turning your TEA into an ATAR. TISC ranks every student’s TEA and expresses your position as an ATAR, a number up to 99.95 that shows the percentage of students you finished above.

So an ATAR of 80 means you finished ahead of about 80 percent of the relevant age group. The ATAR is a rank, not a mark, which is why it can differ from your raw scores.

This national rank is what universities across Australia use, so a WA ATAR is directly comparable to an ATAR from any other state.

Applications and offers

Beyond calculating your ATAR, TISC runs the application process for WA’s public universities. You list your course preferences through TISC, and it makes offers on behalf of the universities in rounds.

You rank your course preferences in order, and TISC matches you to the highest preference you qualify for. This preference system means it is worth ordering your choices carefully, with your genuine first choice at the top.

So TISC is your single point of contact for applying to most WA universities, rather than applying to each one separately.

Interstate and other students

TISC also handles applications from students who did not sit the WACE, including interstate and international applicants. An ATAR earned in another state is recognised, since the ATAR is national.

If you studied elsewhere and want to apply to a WA university, TISC is still the body you go through. Your existing ATAR or qualification is assessed for entry, and offers are made the same way.

When TISC releases results

TISC releases WA ATARs in late December, shortly after WACE results are available, with the exact date confirmed closer to the time. First-round university offers follow in January.

So results day and offers are separate moments: your ATAR in December, then your offer in the new year. See the WA ATAR release date guide for what to expect on the day.

Estimate your WA ATAR

You do not have to wait for TISC to get a sense of your ATAR. Our WACE ATAR calculator applies WA scaling to your course scores and estimates your ATAR, so you can plan ahead.

It is a useful way to see how your best four scaled scores come together, and to test how different results would change your rank. For how the calculation works in full, see how ATAR is calculated in WA.

Which universities use TISC

TISC processes admissions for Western Australia’s public universities, including the University of Western Australia, Curtin University, Edith Cowan University, Murdoch University and the University of Notre Dame Australia. Rather than applying to each one separately, you apply through TISC and list your course preferences in order.

This central system means one application covers most WA universities. TISC then makes offers on behalf of those universities, matching you to the highest preference you qualify for. So getting your preference order right, with your genuine first choice at the top, is worth the effort.

Getting your preferences right

Because TISC matches you to the highest preference you qualify for, the order of your course list matters. List your genuine first choice at the top, even if it is competitive, then realistic options below it as a safety net.

There is no penalty for an ambitious first preference: if you do not qualify, TISC simply moves to your next choice. So rank your list by what you truly want, from most to least, and you give yourself the best chance at your preferred course.