Many banks fill a significant portion of their full-time analyst classes by extending return offers to summer interns. The exact proportion varies by bank, office, group, and recruiting cycle, but the practical consequence is consistent: fewer seats may remain for students applying directly to full-time roles.
A banking internship also signals that a candidate has experienced demanding deadlines, financial analysis, and transaction-oriented work. Without that signal, you must answer two questions: why did you miss the usual path, and what other experience proves you are ready? A clear answer matters more than making excuses.