A deferred exam lets you sit your original exam at a later date because you genuinely could not attend the first sitting (illness, bereavement, or an approved special consideration outcome), so it is marked exactly like a normal exam. A supplementary exam is a second-chance assessment offered after a marginal fail or borderline result, and the mark you can earn is usually capped at a Pass.
If you have just missed an exam or seen a result that sits a few marks short, the language can be confusing. Australian universities use “deferred” and “supplementary” to mean two very different things, with different eligibility, deadlines, and outcomes. This guide explains both clearly, with AU-specific rules, so you know exactly what to apply for, when, and how to prepare. If a borderline result has you weighing your options, it also helps to understand how each grade feeds your transcript through your WAM calculator for Australia and your GPA calculator for Australia.
Key takeaways
- Deferred = you could not sit it: granted for illness or hardship, marked normally, no mark cap.
- Supplementary = a second chance after a near-fail: usually capped at a Pass (50).
- Eligibility differs: deferred needs special consideration evidence; supplementary needs a borderline mark (often 45 to 49).
- Deadlines are tight: deferred applications are commonly due within 3 to 5 working days; supplementary offers are automatic or fast-confirm.
- If you fail the supp: you generally fail the unit and must repeat or “show cause” if at risk.
Deferred exam vs supplementary exam: the core difference
The cleanest way to keep these straight is to ask one question: did you sit the original exam or not?
A deferred exam replaces an exam you could not attend. You apply before or shortly after the scheduled sitting, usually through your university’s special consideration process, with evidence such as a medical certificate. Because you never had your first attempt, the deferred exam is treated as your first attempt. There is no mark cap. You can score a High Distinction on a deferred exam just as you could have on the day, which matters if you are working toward an honours-level result like first class honours at the University of Melbourne.
A supplementary exam (sometimes called a “supp” or “additional assessment”) is offered after you have already sat the exam and finished a few marks short of a Pass, or after a whole-of-unit borderline result. It is a remediation mechanism. Because you have already had your attempt and the university is giving you a further opportunity, the supplementary mark is almost always capped at a bare Pass. At most Australian universities that means 50 (P) regardless of how well you perform on the supp.
For example, a UNSW student hospitalised on the morning of a final exam would apply for special consideration and most likely be granted a deferred exam; the route is set out in our guide to special consideration at UNSW. A Monash student who sat the exam but finished the unit on 47 might be offered a supplementary exam to lift that 47 to a capped Pass, and the special consideration process at Monash explains the deadlines that apply there.
Side-by-side comparison
The table below sets out the practical differences you will care about: when each is granted, who qualifies, the best mark you can get, and how to apply. Exact rules vary by university and faculty, so always confirm with your own course or unit handbook.
| Feature | Deferred exam | Supplementary exam |
|---|---|---|
| When granted | When you could not sit the original exam | After a marginal fail or borderline unit result |
| Who is eligible | Students with approved special consideration (illness, bereavement, hardship) | Students whose final mark falls in a borderline band, often 45 to 49 |
| Max mark possible | No cap, full grade range up to HD | Usually capped at a Pass (50) |
| Counts as which attempt | Your first and only attempt | A second chance after your first attempt |
| How to apply | Lodge special consideration with evidence, usually within 3 to 5 working days | Often offered automatically; confirm acceptance by the stated deadline |
| Evidence needed | Medical certificate, statutory declaration, or supporting documents | None, eligibility is decided from your marks |
Deferred exams: eligibility and process
Deferred exams sit downstream of special consideration. You do not usually apply for “a deferred exam” directly; you apply for special consideration, and a deferred sitting is the outcome the university grants if it accepts that you could not attend. If you are not sure how that application works, our guide to special consideration in Australia walks through the evidence and timing for the major universities.
Who qualifies
Grounds that commonly succeed include acute illness or injury on the exam day, hospitalisation, a death in the immediate family, a serious accident, jury duty, military or emergency-service obligations, and significant unexpected hardship. Foreseeable or controllable circumstances, such as a clash you knew about weeks earlier or a holiday booking, are usually rejected. Universities expect the circumstance to be genuinely beyond your control and to have affected your ability to sit on the day.
The process
- Lodge special consideration promptly. Most universities require the application within 3 to 5 working days of the exam, and many ask that you apply before the exam if you already know you cannot attend. Timing varies by institution, so check the rules for your own campus, such as special consideration at the University of Sydney or special consideration at the University of Melbourne.
- Attach evidence. Upload a medical certificate, a statutory declaration, or other supporting documentation. The certificate should cover the exam date and state that you were unfit to sit.
- Wait for the outcome. If approved, the faculty schedules a deferred exam, often in the next exam period or a dedicated deferred-exam window.
- Sit the deferred exam. Treat it as your real exam. The format and difficulty are equivalent, and the mark counts in full.
Apply for special consideration on the day, not the week after; late evidence is the single most common reason a deferred-exam request is refused.
BAO academic support team
Behind on the assignments around your exam? Our Australian writers deliver original, AI-free, Turnitin-checked work matched to your rubric so you can put your energy into the exam itself.
Supplementary exams: eligibility and process
Supplementary exams work differently because they are about marks, not circumstances. You usually do not need to provide any evidence. Instead, the faculty examines your final result and decides whether you fall into a borderline band that warrants a further assessment.
Who qualifies
Eligibility is mark-based. A typical rule is that students who finish a unit in a narrow band just below the Pass line, commonly 45 to 49, may be offered a supplementary exam. Some faculties also offer supps where a student passed the unit overall but failed a compulsory “hurdle” component, such as a final exam they had to pass separately. Repeated failures, very low marks, or academic misconduct usually disqualify you from a supp. Bands and remediation options differ between institutions, so cross-check yours against the rules for special consideration at RMIT, special consideration at UTS, or special consideration at Macquarie.
The cap on supplementary results
This is the part students most often misunderstand. Because a supplementary exam is a remedial second chance, the highest mark you can usually achieve is a bare Pass. If your faculty caps at 50, then whether you score 51 or 91 on the supp, your recorded result for the unit becomes 50 (P). The cap exists so that a second attempt cannot outrank a first-attempt result earned by classmates. A few universities apply slightly different conventions, so check your unit’s rules, but plan around a capped Pass.
The process
- Watch your results release. Supplementary offers usually appear with, or just after, your final grades. Some are automatic, some require you to accept.
- Accept by the deadline. If acceptance is required, confirm quickly. The window can be as short as a few days.
- Note the sitting date. Supplementary exams are often scheduled in a tight block soon after results, sometimes within a week or two.
- Sit and aim to clear the line. You only need to reach the Pass threshold, so target the threshold confidently rather than perfection.
Deadlines and how to apply
Deadlines are where most students come unstuck. For deferred exams, the clock starts at the missed exam, and the special consideration window is short. For supplementary exams, the clock starts at results release, and acceptance windows can be even shorter. Diarise both the moment you realise you might need them.
Apply through your university’s official student portal or special consideration system, not by emailing a lecturer directly, although it is courteous to let your unit coordinator know. Keep copies of your evidence and the confirmation reference. If you also need more time on a non-exam assessment that is due around the same period, our template-driven guide to writing an assignment extension email shows how to request that professionally.
How to prepare in a short window
Both deferred and supplementary exams often arrive with little notice, so structured revision matters more than volume. A short, focused plan beats cramming.
- Get the format in writing. Confirm the date, duration, location or online setup, and whether it is open or closed book. Deferred exams mirror the original; supps may differ slightly.
- Work backwards from the rubric. Identify the topics that carry the most marks and revise those first.
- Practise under timed conditions. Sit at least one past paper or sample to rebuild exam stamina, especially if illness kept you out.
- For a supp, aim for the threshold. You only need a Pass, so secure the marks you can reliably earn rather than chasing hard, high-risk questions.
- Protect your wellbeing. If the original miss was due to illness, do not over-train. Sleep and recovery improve recall more than a fifth re-read.
If revising for the exam means an assignment in another unit will slip, it can be smarter to delegate that writing than to fail two things at once. A borderline supp result also nudges your overall standing, so it is worth modelling the difference between metrics with our explainer on WAM versus GPA in Australia before you decide which units to protect.
What happens if you fail the supplementary exam
If you fail a supplementary exam, you generally fail the unit. The supp was the additional opportunity, so there is rarely a further sitting for the same attempt. In practice this means you will usually need to repeat the unit, which can affect your progression, your timetable, and, for international students, your enrolment load.
A failed supp can also push you toward your university’s academic progression rules. If you have now failed the same unit more than once, or failed multiple units, you may be asked to “show cause” for why you should be allowed to continue. We cover that process in detail in our guide to what happens when you have failed a unit in Australia and need to show cause. The earlier you engage with your faculty and student support, the more options you tend to have.
Frequently asked questions
What is the difference between a deferred exam and a supplementary exam?
The difference between a deferred exam and a supplementary exam is whether you sat the original. A deferred exam replaces an exam you could not attend and is marked with no cap, while a supplementary exam is a second chance after a borderline fail and is usually capped at a Pass.
Is a supplementary exam mark capped at a Pass?
A supplementary exam mark is usually capped at a Pass, most commonly 50 (P), at Australian universities. No matter how well you perform on the supp, your recorded unit result becomes the capped Pass, because the supp is a remedial second attempt rather than a fresh first sitting.
Who is eligible for a deferred exam in Australia?
Eligibility for a deferred exam in Australia rests on approved special consideration, such as illness, hospitalisation, bereavement, or serious unexpected hardship on the exam day. You lodge the application with supporting evidence like a medical certificate, and if it is accepted the university schedules a deferred sitting.
How do I apply for a supplementary exam?
You apply for a supplementary exam by accepting the offer your faculty makes after results are released, usually through the student portal by the stated deadline. Many supps are offered automatically based on your borderline mark, so the main task is to confirm acceptance and note the sitting date quickly.
What happens if I fail my supplementary exam?
If you fail your supplementary exam, you generally fail the unit and will usually need to repeat it. A failed supp can also trigger academic progression review, and if you have failed the same unit more than once you may be asked to show cause to continue.
How long do I have to apply for a deferred exam?
You usually have a short window to apply for a deferred exam, commonly within 3 to 5 working days of the missed exam through the special consideration process. Many universities prefer that you apply before the exam if you already know you cannot attend, so lodge as early as you can with your evidence.
Can I get a High Distinction on a deferred exam?
Yes, you can get a High Distinction on a deferred exam because it counts as your first attempt and carries no mark cap. Unlike a supplementary exam, a deferred exam is treated exactly like the original sitting, so the full grade range remains available to you.
Do I need a medical certificate for a supplementary exam?
You do not usually need a medical certificate for a supplementary exam, because eligibility is decided from your marks rather than your circumstances. Evidence such as a medical certificate is required for a deferred exam, which is the route for students who could not sit the original at all.