VCE scaling is two separate processes that most Victorian families think are one, and confusing them is why so much advice about it is wrong. VCAA runs statistical moderation on your school-based assessment. VTAC then runs scaling, which turns your study scores into scaled study scores for the ATAR. Different organisations, different purposes, different years’ data. This guide explains both steps, shows the actual VTAC scaled means for 2025, and tells you which of the two you can influence.
At NextStepAcademy we tutor VCE students across Melbourne online, and this is the single topic families most often arrive with the wrong model of.
What is the difference between moderation and scaling in VCE?
Statistical moderation is a VCAA process. It adjusts the scores your school gives you for School-based Assessment so that a mark from one school means the same thing as a mark from another. Scaling is a VTAC process. It happens after your study scores are finalised, and it adjusts scores between studies so that a 35 in one subject can be compared fairly with a 35 in another.
Moderation happens inside a subject, between schools. Scaling happens between subjects, across the state. If you take one thing from this article, take that sentence.
How does VCAA statistical moderation actually work?
VCAA describes moderation as aligning schools’ assessments onto a common scale. The common scale is the external score, which VCAA defines as the composite scale of examination scores and the GAT.
In practice, for most studies the examination results of the students in your class set the level and the spread that your school’s SAC marks are moved onto. In VCAA’s words, in a small number of studies GAT and examination scores are used together where that gives a better match, and in all such cases the examination scores will always be the major influence.
The critical detail, and the one that reassures students most: moderation does not change the rank order of students as determined by the school’s school-based scores. If you were third in your class on SACs, you are still third after moderation. The whole group moves; your position inside it does not.
Does that mean my SAC marks depend on my classmates?
Yes. If your cohort performs strongly in the external examination, the whole group’s moderated SAC scores rise. If the cohort performs weakly, they fall. Without moderation, a school that marked generously would hand its students an advantage over one that marked strictly, and removing that is the entire point.
What you control is your rank in the class and your own exam performance. That is why we tell students to treat every SAC as a ranking exercise, not a percentage.
How is a VCE study score calculated?
Your study score is a number from 0 to 50 that describes your position in that study relative to everyone else in Victoria who did it. VCAA sets the mean at 30 with a standard deviation of 7, and most scores land between 23 and 37.
The process is statistical. Each graded assessment score is standardised against the state mean and standard deviation, weighted by its contribution to the study, summed, ranked, and then converted onto the 0 to 50 scale. We cover this from the parent’s point of view in our guide to what a VCE study score actually is.
What is a VTAC scaled study score?
Once VCAA has produced your study scores, VTAC scales them. A VTAC scaled study score ranges from 0.00 to 55.00 and reflects how you performed in a study relative to all students across all subjects.
The logic is that a study score of 35 in Specialist Mathematics and a study score of 35 in Food Studies do not represent the same achievement, because the students competing for those scores are not the same population. Scaling corrects for that so that students with different subject combinations can be ranked on one number.
Which VCE subjects scaled up in 2025, and by how much?
These are VTAC’s own published figures from the 2025 Scaling Report. The scaled mean is the average scaled study score for that study’s scaling population. Because the study score mean is set at 30, a scaled mean above 30 means the study scaled up on average, and below 30 means it scaled down.
| 2025 VCE study | VTAC scaled mean | A study score of 30 became | A study score of 40 became |
|---|---|---|---|
| Specialist Mathematics | 41.5 | 43 | 51 |
| Mathematical Methods | 34.4 | 35 | 46 |
| Chemistry | 33.6 | 34 | 44 |
| English Language | 32.6 | 33 | 43 |
| Physics | 31.7 | 32 | 42 |
| Biology | 30.5 | 31 | 41 |
| English | 28.2 | 28 | 39 |
| General Mathematics | 27.8 | 28 | 38 |
| Physical Education | 27.6 | 27 | 38 |
| Business Management | 27.2 | 27 | 38 |
| Health and Human Development | 26.4 | 26 | 37 |
| Food Studies | 24.1 | 23 | 35 |
Source: VTAC, 2025 Scaling Report, published 11 December 2025. The converted scores are VTAC’s own published values rounded to the nearest integer; the formal aggregation uses two decimal places.
Note what the middle two columns show. Food Studies at a study score of 40 becomes 35, while Specialist Mathematics at 40 becomes 51. That is a 16 point gap at the same study score, which is the strongest single argument for taking subject choice seriously in Year 10.
Why does the same subject scale differently each year?
Because scaling is recalculated annually from that year’s scaling population, which VTAC defines as candidates who obtained at least one study score in the year, at least four in total, at least one in an English study, and who do not already have an ATAR. So a 2025 scaled mean describes 2025. Use it as a guide to the general order of studies, not as a calculator, and treat anyone quoting a scaled score for a future year as guessing.
How is the ATAR calculated in Victoria?
VTAC calculates your aggregate as the sum of your primary four scaled study scores plus up to two permissible increments. Your primary four is:
- your scaled study score in one English study (English, English as an Additional Language, English Language or Literature), which is compulsory in the aggregate, plus
- your next three highest permissible scaled study scores.
The increments are 10 per cent of a fifth and 10 per cent of a sixth scaled study score, plus eligible VET or higher education increments. A maximum of six studies can contribute. Aggregates are then ranked and placed on a percentile scale to produce ATARs from 0.00 to 99.95.
This is structurally different from New South Wales, where the aggregate is built from 10 units. A guide written for the HSC will give a Victorian student the wrong answer, which is why we keep our VCE material separate.
What aggregate do you need for a given ATAR?
VTAC publishes an aggregate to ATAR table each year. From the 2025 report, the minimum scaled aggregate required was:
| 2025 ATAR | Minimum 2025 scaled aggregate |
|---|---|
| 99.00 | 192.10 |
| 95.00 | 169.85 |
| 90.00 | 155.19 |
| 80.00 | 135.65 |
| 70.00 | 120.42 |
| 60.00 | 107.03 |
| 50.00 | 94.06 |
Here is an illustrative worked example. A student takes English (study score 32), Mathematical Methods (35), Chemistry (33), Biology (34), Psychology (30) and Business Management (28). Using the 2025 scaled values, English 32 scales to about 30, Methods 35 to 41, Chemistry 33 to 37 and Biology 34 to 35. The primary four sum to roughly 143, and 10 per cent each of the scaled Psychology and Business Management scores adds about five more. An aggregate near 148 would have sat between an ATAR of 85 and 88 in 2025. Change nothing except swapping Business Management for Specialist Mathematics and the picture moves materially, because the increment is drawn from a much higher scaled score.
Should you pick subjects because they scale up?
Only at the margin. Scaling rewards the position you achieve, and your position depends on how well you actually do. A student who takes Specialist Mathematics and finishes in the bottom third of it does worse than the same student taking General Mathematics and finishing near the top.
The rule we give families is this. Choose subjects you can rank highly in, from a group that keeps your course options open, and let scaling be the tie-breaker between two subjects you are equally suited to. Timing matters too, which we cover in our guide on when Melbourne students should start VCE tutoring.
When are the 2026 VCE exams and results?
The 2026 VCE written examinations run from Tuesday 27 October to Wednesday 18 November 2026, per the VCAA examination timetable. The 2026 GAT was held on Tuesday 16 June. VCE results and ATARs are released together at 7 am on Thursday 10 December 2026, with the digital ATAR statement issued at 9 am on 15 December, per VTAC’s published dates.
Where can VCE tutoring help with this?
Not with scaling, which nobody can change. It helps with the two things that feed it: your rank inside each class, and your examination performance, which sets where the whole class lands after moderation. That is the practical reason exam preparation matters more in Victoria than students expect.
NextStepAcademy offers online VCE tutoring in Melbourne, along with high school tutoring in Melbourne and subject support such as maths tutoring in Melbourne across the wider Melbourne tutoring area. Our First Lesson Guarantee means that if you do not love the first lesson, you do not pay for it. Book a lesson today.
Frequently asked questions
Is VCE scaling done by VCAA or VTAC?
Both, but they do different jobs. VCAA runs statistical moderation of School-based Assessment and produces your study scores. VTAC then scales those study scores into scaled study scores for the ATAR.
Does the GAT affect my ATAR?
Indirectly and only in some studies. VCAA states that the external score used in moderation is the composite scale of examination scores and the GAT, and that in the small number of studies where both are used, examination scores are always the major influence.
Which VCE subject scaled the highest in 2025?
Among mainstream studies, Specialist Mathematics had the highest scaled mean at 41.5. Several languages scaled higher again, including Chinese Second Language at 40.2 and French at 40.2, per the VTAC 2025 Scaling Report.
Can a study score go above 50 after scaling?
The study score itself is capped at 50, but a VTAC scaled study score ranges from 0.00 to 55.00. In 2025 a study score of 50 in Specialist Mathematics scaled to 55.
When do VCE results and ATARs come out in 2026?
Both are released together from 7 am on Thursday 10 December 2026, according to VTAC’s published key dates. The digital ATAR statement is issued at 9 am on 15 December 2026.