Understanding VCE study scores, scaling and the ATAR can help you plan your study without confusing a rank with a percentage mark. This guide explains the main steps, with a worked example and links to official guidance.
What does an ATAR mean?
The Australian Tertiary Admission Rank (ATAR) is a rank from 0.00 to 99.95 that compares overall Year 12 achievement with the Year 12 age group. In Victoria, VTAC calculates it from eligible scaled study results. An ATAR of 90.00 indicates achievement above 90% of the age group. It is not a mark of 90%, and the comparison is not limited to students who completed Year 12.
See the VTAC ATAR and scaling guide for the current rules.
How is the ATAR aggregate calculated?
The aggregate generally combines your primary four scaled study scores and 10% of eligible fifth and sixth results. An eligible English-group study must be included in the primary four. Study-area grouping restrictions also apply: no more than two mathematics studies can be in the primary four, and no more than three studies from a study-area group can contribute to the aggregate.
Here is a simplified example using eligible VCE results:
| Subject | Scaled study score | Contribution |
|---|---|---|
| English | 30 | 30 |
| Mathematical Methods | 41 | 41 |
| General Mathematics | 43 | 43 |
| Specialist Mathematics | 40 | 4.0 |
| Chemistry | 36 | 3.6 |
| Psychology | 37 | 37 |
| Aggregate | 158.6 | |
Only two mathematics studies can be in the primary four, so Specialist Mathematics contributes 10% in this example despite its higher scaled score than Psychology. VTAC converts aggregates into ATARs each year; 158.6 does not correspond to one fixed ATAR in every year.
What is a VCE study score?
A study score is a number from 0 to 50 showing your performance relative to other students who took the same VCE study in the same year. VCAA combines standardised graded-assessment results using the weightings for that study. The study-score distribution has a mean of 30 and a standard deviation of 7.
Assessment components and weights vary by study. Some use Unit 3 SACs, Unit 4 SACs and an examination; others include school-assessed tasks, performances or multiple examinations. General Mathematics, Mathematical Methods and Specialist Mathematics use combined coursework and two examinations. Check the current VCAA assessment summary and your study design.
Only the specified graded assessments contribute to the study score. Teachers also use classwork and other evidence to decide whether you have satisfactorily completed a unit. That S/N decision is separate from your level of achievement.
How do SAC moderation and scaling work?
VCAA statistically moderates school-assessed coursework to make results comparable between schools. It uses external results for the students taking that particular study while preserving their school-assessed rank order. A school’s reputation or results across unrelated subjects do not automatically lift an individual score.
VTAC scaling is a separate process used when combining results from different studies into the ATAR aggregate. A scaled study score is not the same thing as a moderated SAC mark. Read the VCAA moderation explanation and the VTAC scaling guide for detail.
How common are different study scores?
For VCE studies with at least 1,000 enrolments, the approximate proportions achieving each score or higher are:
- 45 or above: 2%
- 40 or above: 9%
- 35 or above: 26%
- 30 or above: 53%
- 25 or above: 78%
- 20 or above: 93%
Smaller studies can vary. Source: VCAA guidance on interpreting results.
Does the GAT affect my results?
The GAT does not directly contribute a subject score to your ATAR. VCAA uses GAT results in assessment quality assurance and, in some studies, statistical moderation. They may also help calculate a derived examination score when an eligible student’s examination performance is affected by illness or other circumstances.
Does SEAS change my ATAR?
No. Equity schemes, often called SEAS, can increase the selection rank used for individual courses when eligible circumstances are considered. They do not change your ATAR, remove prerequisites or guarantee an offer. Check VTAC’s current requirements and deadlines, and ask your school’s careers adviser for help early.
Read our SEAS application guide for an overview.
What should you focus on?
Prioritise understanding your subjects, practising under appropriate conditions and using feedback to improve. Working with classmates can support learning, but it does not guarantee higher moderated marks. For help with concepts, SAC preparation and exam practice, explore VCE tutoring at Loav Tuitions in Springvale.
