One indication that it may be time to change your major is low grades. If you're struggling to get passing grades in classes related to your major, maybe you should pick a field that feels easier to learn and better complements your talents. For example, if you're an artistic, creative type of person, majoring in biochemistry might not be the best option. While bad grades aren't always a sign you should switch directions, it may be a warning sign that your skill set doesn't match your current major.
While your major doesn't have to reflect your deepest passions, it should be a subject you're interested in. If your major doesn't relate to the field of work you see yourself entering after college, it's probably time to change it. As you progress into your junior and senior year, taking courses in a major that doesn't interest you will only become more difficult. If you're not entirely sure what you want to do after college, pick a major that encompasses a broad range of subjects and disciplines, such as communications or business.
If you're concerned about the job prospects in your chosen major's field, it may also be a sign you should reconsider what you're studying. For example, if you're studying theater but don't see how you can earn a living as an actress, you might want to consider a related major in the arts that could help you get a better job. While college is a time to learn and explore who you are, it is also an opportunity to give yourself an advantage when it comes to developing your career. It may be possible to find a major that encompasses your passion while also giving you post-college job options.
If you're entering into your second or third year of college, you might want to consider changing your major while you still have time. It can be hard to change majors in your senior year, and it could require you stay in school much longer. Before you register for classes, consider where you are in your college career. Talk to your guidance counselor about what a major change would require. If you think you might want to take a different direction, it could be better to switch gears now in order to graduate on time.