Button-down shirt with slacks for most companies. That way you're unlikely to be penalized before being over or under-dressed. When going for a leadership level

Button-down shirt with slacks for most companies. That way you're unlikely to be penalized before being over or under-dressed. When going for a leadership level position, add a blazer or sport coat. For C-level positions or if you are interviewing in the finance industry, wear a suit.