Major flexibility varies significantly by school and by program. Here is what you need to know before assuming you can easily switch.
The General Rule: Most Majors Are Flexible
At most liberal arts colleges and comprehensive universities, students are expected to explore their interests in the first one to two years and declare a major in their sophomore year. Changing your major before declaring is simple — you just register for different courses. Even changing after declaration is typically possible with advisor approval, as long as you can complete requirements within your remaining time at the school.
The Exception: Competitive Direct-Admit Programs
Some highly sought-after programs admit students directly from high school into a specific school or college within the university — and these programs have restricted internal transfer policies:
UC Berkeley Computer Science (College of Engineering): Students admitted to L&S (Letters and Sciences) cannot easily transfer into the Engineering CS program. Admission statistics for EECS (Electrical Engineering and Computer Science) are extremely competitive as an internal transfer.
University of Michigan Business (Ross School): Ross admissions happens during sophomore year through a separate application with GPA and essay requirements. Not guaranteed even for high-performing students.
Nursing programs: Many nursing programs are direct-admit with limited internal transfer capacity. Switching into nursing from another major can be very difficult or impossible at some schools.
Engineering programs: At some schools, internal transfer into engineering requires maintaining strong STEM grades and applying through a formal process.
The 'Apply Undecided, Switch In' Strategy
For programs where direct high school admission is highly competitive but internal transfer is also competitive, research whether applying to a related but less competitive program and switching in later is a viable path — or whether it simply delays the same gatekeeping. At some schools this works; at others, direct admission is the only realistic path.