McMaster acceptance rate and admission averages

Somewhere between your Grade 12 midterm marks and the first OUAC reminder from your guidance counsellor, McMaster stops being just a name on a list and becomes a real question. Are your marks close enough, or is it a long shot?

This guide walks through the numbers that matter for your program, the courses and deadlines to plan around, what supplementary applications involve and what your options look like if your marks land a little short.

McMaster's acceptance rate and admission averages at a glance

McMaster University made 21,072 offers to 34,082 Ontario high school applicants in 2024, an acceptance rate of about 62%, according to McMaster's Fact Book. In the same year, 61% of new McMaster students arrived with an admission average of 90% or higher.

McMaster shares its enrolment and admissions data through its institutional research office's Quick Facts page. So what does the overall rate tell you? It's a helpful starting point. However, it blends every program together, and some McMaster programs are far more competitive than one university-wide number suggests.

Why McMaster doesn't publish one acceptance rate

Here's something that surprises a lot of families: McMaster doesn't advertise an acceptance rate as a headline number, and neither does the University of Toronto.

The rate you see quoted online is usually calculated by dividing the number of offers by the number of applicants.

Since each website does its own math, the numbers don't always match. For example, UniAcco's third-party guide, McMaster University Acceptance Rate 2025, reports 20,079 acceptances from 33,195 applications in 2021, or 60.4%.

A difference of a point or two usually comes down to a different year or a different way of counting. It isn't a sign that anyone is hiding anything.

Acceptance rate versus the average you actually need

Think of the overall rate as a blend of very different programs, from highly competitive ones to more flexible ones. On its own, it can't tell you whether McMaster is a reach or a safer choice for you.

Program-by-program acceptance rates aren't part of McMaster's published data. Instead, two other things matter most:

• Your program's admission average: the range of Grade 12 marks that admitted students typically bring.
• The supplementary application: an extra application, separate from your main one, that some programs require. Both are covered below.

Why the 3.9% medical school figure doesn't apply to high school applicants

You might have come across a much smaller number, and it tends to cause a lot of worry. UniAcco reports that McMaster's medical (MD) program received 5,228 applicants in 2022, which is where the medical school figure comes from.

The MD program, though, is a completely separate admission. Students apply to it after finishing an undergraduate degree, so it has nothing to do with your Grade 12 application.

AdmissionPrep's McMaster admissions guide makes a related point. Getting into an undergraduate health program, such as Health Sciences, is not the same as being admitted to medical school.

McMaster admission requirements by program

Each McMaster program sets its own admission range and its own list of required Grade 12 courses. The official versions are on McMaster's admission requirements page. The research behind this article didn't include every program's official range, so that page is the best place to check yours.

So far, the clearest official numbers come from the Faculty of Engineering FAQs, which list Free Choice cut-offs for the Fall 2026 intake. A Free Choice cut-off (explained in the next section) is the mark for a guaranteed specialty, not the 87% minimum average to be considered.

• Engineering 1: 97% Free Choice cut-off, with a required supplementary application.
• iBioMed (Integrated Biomedical Engineering & Health Sciences): 98.7% Free Choice cut-off, with a required supplementary application.

Computer Science and the Bachelor of Technology (BTech) don't have a published cut-off on the same page. Even so, both use the same mandatory supplementary application as Engineering and iBioMed.

Self-reported applicant data, not official:

• Life Sciences: Students posting in Reddit's r/McMaster 2025 Admissions Megathread describe a typical cut-off of around 93%, with self-reported averages from 89% to 96% for the 2025 cycle. Treat the Reddit numbers as rough signals from individual applicants rather than McMaster data.

Keep in mind that every figure in this section applies to Ontario Grade 12 applicants. Averages shift each year depending on who applies, and reaching a range or cut-off doesn't guarantee an offer.

How Free Choice works in McMaster Engineering and iBioMed

What exactly is Free Choice? In McMaster Engineering and iBioMed, it's a guaranteed choice of discipline (your specialty, such as mechanical or electrical engineering) starting in second year. The faculty bases it on your Grade 12 admission average, and it depends on successfully finishing first year.

• Cut-offs move each year: They depend on who applies and typically land in the mid to high 90s.
• Some options are excluded: Free Choice can't be used for Chemical & Bioengineering, the & Management programs or the & Society programs.
• You'll likely still get your pick: McMaster says the majority of students are placed in their preferred discipline, even without Free Choice.

Getting in is only the first step, though. To move into Level II (McMaster's term for second year), Engineering 1 and iBioMed 1 students are expected to keep a 4.0 GPA.

That 4.0 is on McMaster's own 12-point university scale, where it works out to about 60% to 62%. It isn't a high school measure at all, since Ontario high schools report marks as percentages.

Prerequisite courses explained

A prerequisite is a Grade 12 course a program requires before it will consider your application. Each McMaster program has its own list, and the course names depend on the province where you finish high school.

Ontario Grade 12 courses McMaster programs commonly require

In Ontario, McMaster's requirement lists use Grade 12 university-preparation (4U) course codes. Common codes on the lists include:

• ENG4U (English)
• MHF4U (Advanced Functions)
• MCV4U (Calculus and Vectors)
• SBI4U (Biology)
• SCH4U (Chemistry)
• SPH4U (Physics)

Which ones apply depends entirely on your program. Two similar-sounding programs can ask for different courses, so your program's entry on McMaster's admission requirements page is the place to confirm your list.

Applying from BC, Alberta or another province

If you're finishing high school outside Ontario, course names won't line up one-to-one. Grade 12 chemistry, for example, is SCH4U in Ontario, Chemistry 12 in BC and Chemistry 30 in Alberta.

McMaster's admission requirements page is the place to see which courses from your province count. AdmissionPrep also suggests building a program-specific checklist, which comes in especially handy when you're applying from another province.

What happens if a prerequisite is missing or weak

Missing a required course right now isn't automatically a problem, as long as you finish it in time. However, Engineering's FAQ page notes that courses completed after the deadline in step 5 below, just before the Fall start, won't count toward your admission average.

A weak mark in one prerequisite will pull your average down. Still, it's rarely the end of the road, and the gap section further down walks through your options.

Deadlines and how to apply to McMaster through OUAC

Every applicant to McMaster applies through the Ontario Universities' Application Centre (OUAC), the online system that handles applications for Ontario universities. Here's the order most first-time applicants follow.

1. Submit your OUAC application

First, Ontario high school students fill out the OUAC 101 application, while students from other provinces use the OUAC 105. Current dates for both are posted on the Ontario Universities' Application Centre website.

2. Activate your McMaster account

Next, an email arrives with your Mac ID, which is your McMaster login. If it hasn't shown up, McMaster Engineering suggests waiting 10 business days after applying on OUAC before reaching out.

3. Complete any supplementary application

Then comes the supplementary application, if your program has one. The deadlines below come from AdmissionPrep's guide, which checked them against McMaster's overview on October 10, 2026. You can confirm each one on McMaster's supplementary application overview.

4. Watch for offers in March and May

After that, it's mostly waiting. The engineering faculty's FAQ says offers for BTech, Computer Science, Engineering and iBioMed go out in two main rounds: early to mid-March and early to mid-May. There are no early offers before March.

Other faculties may follow a different schedule, and some by-selection programs make offers in late April to early May. Your program's own page is the best guide for its timing.

5. Finish your required courses by June 30

Finally, an offer from McMaster is conditional, which means it depends on what happens next. To keep it, you'll finish your high school diploma and all required courses by June 30, as the Engineering FAQs explain.

How to close the gap if your average is below the range

Let's be honest: in a competitive program, a gap of a few points does matter. Even so, there are real, legitimate routes forward, and you have more than one to choose from.

Some students also get focused help in one weak prerequisite, such as MCV4U or SCH4U, alongside the routes below.

Retaking a course to raise your mark

Retaking a course is one of the most direct options. McMaster Engineering states that if you've repeated up to two courses, McMaster uses your highest mark.

Repeating more than two courses, or taking one course three or more times, may mean writing a letter of explanation. (A letter of explanation is a short note telling the admissions team why you retook the courses.)

Taking a prerequisite in summer, night or online school

Taking a required course outside the regular school day is another option. According to the same faculty page, you're not at a disadvantage for completing it in summer, night or online school, as long as it's finished before the step 5 deadline.

Applying to a related program with a different average

Sometimes a related program covers similar subjects but has a different admission range. Comparing programs side by side on McMaster's admission requirements page can turn up options you hadn't thought about.

Transferring after first year somewhere else

Some students start at another university, or in a different McMaster program, and then apply to transfer later. Transfer rules depend on the program, so McMaster's admissions office is the most reliable place to ask.

Taking a gap year and reapplying

A gap year (a year off between high school and university) can give you time to upgrade marks or strengthen a supplementary application. It's a personal choice, and it tends to work best with a clear plan for how you'll spend the year.

What McMaster supplementary applications actually ask for

Why do some programs ask for more than marks? A supplementary application gives McMaster a fuller picture of who you are, beyond your average. Each program runs its own version, and the deadlines sit in the table in step 3.

Engineering, Computer Science, BTech and iBioMed

Engineering, Computer Science, BTech and iBioMed share one mandatory supplementary application. It also applies to second-degree applicants (students who already hold a university degree), and even if you apply to several of the four programs, you only submit it once.

McMaster weighs your supplementary alongside your admission average. The application runs on KIRA, an online platform, as AdmissionPrep describes, and consists of three video responses and one written response. For technical problems, KIRA support is available at support@kiratalent.com.

Honours Health Sciences

For Honours Health Sciences, AdmissionPrep reports that the questions are released on December 1, 2026. That's the date you can first see them, not the due date.

The same guide adds that past questions aren't this year's questions, and McMaster hasn't published a scoring formula. In other words, honest reflection on your own experiences tends to serve you better than memorized answers.

Arts and Science, Integrated Science and other programs

Arts & Science, Integrated Science and several other programs each use their own format. AdmissionPrep's list also includes separate entries for Leadership & Civic Studies, Midwifery and optional Business submissions.

Each program's current requirements are posted on McMaster's supplementary application overview.

Taking your next step with McMaster at your own pace

Averages shift from year to year, and your mark is only part of the picture, since supplementary applications count too. It's okay to take your time and build a balanced OUAC list with a mix of reach, target and safer choices. You don't have to have every answer figured out today.

If you'd like support with a Grade 12 prerequisite before your applications are due, you can browse vetted tutors on TutorLyft's find a tutor page.