For most colleges, choosing “undecided” as your major will not affect your chances of getting accepted. Admissions officers understand that some students won’t be ready to commit to a degree path right out of high school. However, selecting “undecided” could be harmful if you’re choosing a major that requires you to be admitted as a freshman. It may also be a bad look if you submit college essay that focuses on your love for a certain area of study. In these cases, it’s better to select the major that's most closely aligned with what you're passionate about instead of choosing undecided. If you discover that you're ultimately a better fit in another area of study, you can change your major later on.