<p>That would be very difficult. You need to be accepted to the college of business as a double major. For that, if you are in another college when you begin, the best time to apply for the second major is for beginning of junior year. However, to be accepted to the business college, which seldom accepts anyone as a double major from another college, you need to complete, during your first two years, the course load requirements that a normal business student completes in the first two years in a particular business major that you might want to pursue. That is difficult to do if you are in engineering because the course load requirements you have for engineering basically fill your entire schedule. Note UIUC has General Engineering as one of its engineering majors which has to it a business administration bent. It is easier to apply and be accepted for a minor in business but even that is difficult to do if you are in engineering because the engineering curriculum doesn’t give many spots to put courses for an unrelated minor in your schedule.</p>