Top 10 Toughest Courses in the World (Updated 2026)

What is the Meaning of a Tough Course?

A tough course is a challenging one that is academically complex and involves a rigorous curriculum, extreme intellectual rigor, high-stakes examination structures, and intense, long-term workloads. The toughest courses in the world involve research-based courses, technical courses (STEM courses included) and courses related to CA or CFA which are ideally tough ones to crack in the first go.

Top 10 Hardest Course in World 2026

Any course at the college level studied whether abroad or locally is not a cakewalk. Courses at the college level are very different from school-level learning. There are some courses which are technical while some are non-technical; some are professional, and some are non-professional. Also, there are some courses abroad that are tough and there may be a few which may not be tough. Based on course load and how students find the course, followed by completion rate, we have compiled some of the most difficult courses in the world. The list of the 10 most difficult courses in the world is given below. 

The above-mentioned are by popular choice, the top 10 toughest course in world. Let us discuss these toughest courses in the world for international students in the following section. If you're curious about the easiest degrees, check out our article on the top 10 easiest courses to study.

Based on the list of toughest courses in the world, applicants who wish to take them up need to understand what these actually look like. Let us discuss in detail why the above-mentioned courses are the toughest in the world in the following sections:

1. Medicine Courses

Medicine courses are the toughest courses in the world. The reason why courses like MBBS, MD and MS are so difficult is because of the nature of the curriculum, which is vast and requires a lot from the students mentally and physically. These courses are challenging in their own ways and demand that students to think logically and find solutions to problems based on technicalities. A lot happens in a medical student's life - medicines, learning procedures, understanding what the right medicine is and what is not, practicals, watching live procedures, etc. These reasons make medicine courses the toughest of the lot, in turn making it to the top 10 toughest course in world.

Top Countries to Study Medicine Courses:

• MBBS or MD in USA
• UK
• Canada
• Australia
• Russia 

Top Universities for Medicine Courses:

• Harvard University
• University of Oxford
• Stanford University
• John Hopkins University
• University of Cambridge

Highest Paid Jobs After Medicine Abroad:

2. Engineering Courses

Engineering courses are the toughest in the world, too, irrespective of the degree level at which they are offered. Some of the toughest engineering courses include nuclear engineering, aerospace engineering, and biomedical engineering. The reason why engineering courses are the toughest in the world is because of their technicality and precision. Again, the engineering course curriculum is vast and is spread over four years with challenging projects and assignments. Practicals and, in some cases, on-field research also. From working with dangerous chemicals to finding environmental solutions, all come under engineering courses. Together, these parameters make engineering courses some of the hardest subjects in the world. Thus, making it to the top 10 toughest course in world. For those interested in pursuing Engineering courses, can check out the Top 5 Engineering Courses for Future with High Salaries. 

Top Countries to Study Engineering Courses:

• USA
• UK
• Germany
• Australia
• New Zealand

Top Universities for Engineering Courses:

• Massachusetts Institute of Technology (MIT)
• California Institute of Technology (Caltech)
• Purdue University
• University of Michigan
• Imperial College London

Highest Paid Jobs After Engineering:

3. Neuroscience Courses

Neuroscience courses are the toughest courses in the world. Neuroscience is all about the brain and its function. There are billions of aspects that one can learn about the brain; thus, this is why Neuroscience is the hardest course in the world. There are a lot of complex topics that form a part of neuroscience, which makes it even more challenging. Since many studies about the brain have been published, neuroscience has backed them all up. So if you are interested in learning about the human brain, its functions and applications and are ready for the challenge, then you can choose this toughest course. These reasons make Neuroscience one of the hardest subjects in the world, hence making its position in the list of the top 10 toughest course in world.

Top Countries to Study Neuroscience Courses:

• USA
• Canada
• UK
• Australia
• Germany

Top Universities for Neuroscience Courses:

• MIT
• University of Oxford
• ETH Zurich
• University of Toronto
• The University of Melbourne

Highest Paid Jobs After Neuroscience:

4. Quantum Physics Courses

A branch of Physics and one of the toughest ones in the world. Quantum Physics requires mathematical, computer science, and quantum lingo skills. It is about studying atoms and particles at the very basic level and applying the theories in the real world. Of all scientific courses, Quantum Physics has been credited as the toughest course in the world. Because of difficulty level, it makes it to the top 10 toughest course in world.

Top Countries to Study Quantum Physics Courses:

• USA
• Germany
• France
• Japan
• Australia

Top Universities for Quantum Physics Courses:

• California Institute of Technology (Caltech)
• MIT
• University of Cambridge
• ETH Zurich
• National University of Singapore

Highest Paid Jobs After Quantum Physics:

5. Chemistry Courses

Chemistry courses are tough because they have many abstract concepts like atoms, molecules and ions. Numerous chemical reactions can be studied practically. There is a lot of maths in Chemistry, which makes it even tougher. The Chemistry course is a blend of problem-solving skills and practicals that are essential for completing a course in Chemistry at the bachelor's or master's level. Thus, all of these factors together make Chemistry one of the hardest courses in the world, and thus making it into top 10 toughest course in world. 

Top Countries to Study Chemistry Courses:

• USA
• UK
• Germany
• Japan
• France

Top Universities for Chemistry Courses:

• MIT
• CalTech
• Heidelberg University
• University of Cambridge
• University of Tokyo

Highest Paid Jobs After Chemistry:

Wish to pursue an MS in Chemistry abroad? Check out the top universities and specialisations available for international students. 

6. CA Courses

Pursuing a course in CA is itself very challenging. CA degree is considered one of the hardest degrees in the world. CA as a course is tough because it always keeps its students on the go. There are so many exams, and lots of literature and the nature of qualifying for a CA course is based on a lot of parameters. If you cannot qualify for even one exam, all your effort will go to waste. Along with the exams is articleship, similar to an internship, which is equally essential to fulfil. These reasons make the CA course one of the hardest subjects in the world, and also among the top 10 toughest course in world. 

Top Countries to Study CA Courses:

• USA
• Australia
• Canada
• UK
• New Zealand

7. Pharmacy Courses

A pharmacy course is one of the hardest courses in the world. It includes areas of Science, from Chemistry to Pharmaceutical Inorganic Chemistry, Pharmaceutical Organic Chemistry, Pharmaceutical Analysis, Human Anatomy and Physiology, and Pharmacology are all a part of the pharmacy courses curriculum. Thus, all these topics are very tough in their own terms, which further makes pharmacy courses some of the toughest ones in the world. This is the reason why Pharmacy courses make it to the top 10 toughest courses in the world.

Top Countries to Study Pharmacy Courses:

• USA
• UK
• Canada
• Germany
• Australia

Top Universities for Pharmacy Courses:

• UCLA
• University of Wisconsin-Madison
• University of London Pharmacy School
• University of Sydney
• University of Toronto

Highest Paid Jobs After Pharmacy Courses:

8. Data Science Courses

With a lot of technical skills, lots of data and an understanding of the science behind the data, this is the data science course abroad, another of the toughest courses on the list! There is a lot of programming; students have to learn different types of programming languages and put them into practical use. Since data scientists are in high demand, more and more students opt for this course, which is very challenging to complete and qualify for. For these reasons, Data Science is one of the hardest subjects in the world to study and, in turn, also makes it to top 10 most difficult courses in the world.

Top Countries to Study Data Science Courses:

• USA
• Germany
• UK
• France
• Australia

Top Universities for Data Science Courses:

• MIT USA
• Carnegie Mellon University
• University of California, Berkeley
• University of Oxford
• Harvard University

Highest Paid Jobs After Data Science:

9. Architecture Courses

Architecture courses are difficult because of their technical aspect. The precision required for an architect to qualify for the course is based on how well he/she performs in exams and practicals and possesses the know-how of the subject. Architecture universities abroad offer Architecture as a technical subject; the higher the level of study, the more difficult it gets for students. Understanding complex structures and being able to understand how is what the course demands. Thus, it makes it one of the top 10 toughest course in world.

Top Countries to Study Architecture Courses:

• USA
• UK
• Italy
• Germany
• Australia

Top Universities for Architecture Courses:

• MIT
• ETH Zurich
• Delft University of Technology
• University of Copenhagen
• University College London

Highest Paid Jobs After Architecture:

10. Law Courses

Law courses are the hardest courses in the world. There is a plethora of literature available for students to study and pursue these courses. Students pursuing an LLB or LLM abroad will have to have proper knowledge of the laws, the sections and how and when to apply the correct law. Though jobs are limited for law grads, whatever is available are usually high-paid ones abroad. Thus, law courses are also the hardest courses in the world, and making lots way into the top 10 toughest course in world.

Top Countries to Study Law Courses:

• USA
• Australia
• UK
• Canada
• New Zealand

Top Universities for Law Courses:

• Harvard University
• Yale Law School 
• University of Cambridge
• National University of Singapore
• University of Melbourne

Highest Paid Jobs After Law:

There are a couple of ways which suggest how tough a course can be in the long run. Though tough or difficult is subjective, based on some of the common parameters, applicants can know if the course will be difficult or not. The factors that help pick out the most difficult courses in the world are listed below.

• Challenging Course Load: Stress and the need to cope with the speed of covering the exhaustive course modules. The syllabus is also challenging plus higher course credits are needed. 
• High Dropout Rates: Students often drop out because they cannot cope with tough courses. The time taken to complete courses is more than usual. Plus, financial burden.
• Backlog/Gap Years: Many complain that they could not cope and end up having a backlog. Some of them also have a gap year to clear their unfinished backlogs. This also makes courses tougher.
• Higher Acceptance Rates: For courses like MBBS (MD) in Harvard, acceptance rates are high, and only a handful get through. So this is another aspect. 
• Competitive Job Roles: Based on the tough course completed, students may have to take licensing exams to practice. Getting through these will get them a job, which is again a tough step.
• Global Recognition for Toughness: Many ranking agencies or educational websites explicitly claim if a course is tough or not. So they can be relied upon for the same.

These factors together help applicants understand the hardest course in the world and how they should ideally plan and if they really want to pursue these hardest subjects in the world or not.

Most Difficult Courses in the World - By Specialisations

Since each of the courses above is very broad in its approach, each of them has certain areas of study in which specialising can be even tougher for study. Let's discuss each of these most difficult courses in the world in detail below, along with the options that make these courses the world's toughest degrees. 

The list just does not end here; many more specialisations and courses are deemed as tough which may change over time based on the student’s experiences.  

How to Choose the Right Toughest Course for Studying Abroad?

Multiple parameters will have to be taken care of when choosing any of the above-mentioned toughest courses in the world. These not only include a specific specialisation but also the choice of college as well. Here are a few tips:

• Research the course and understand if you have any interest.
• If you develop any interest towards these courses, understand if you can sustain them for the long term.
• Make sure you are interested because, in the long term, having a gap year can be problematic.
• Also, check if there is any further scope for high-paying jobs or for higher education after this. 
• Understand everything about the course - its curriculum, research- or non-research-based course option, available specialisations and other details. 

This was all about some of the most difficult courses in the world, the difficult deciding factors and the world's toughest courses' specialisations. If you wish to study abroad, then you can get assistance from Shiksha Counselling Services for free. You can also drop your queries in the comments section below.