Most of us when dealing with banks usually walk into the branch and get our work done we usually do not bother whether it is retail banking branch or a corporate banking branch. The difference between retail and corporate banking is that retail banking serves individuals and entities that are not corporates whereas corporate banking deals with large corporates who want to bank with that institution. The other end of the spectrum is the investment banking, which deals with high priced and low volumes deals like arranging for mergers and acquisitions, takeovers, and other deals aimed at the top notch of the management in the corporates. Further, it must be mentioned that whereas retail banking is volumes driven, corporate banking is a combination of volumes and size of the transactions, investment banking is purely driven by the size of the deals where volumes are usually low as the lack of it is made up by the fees earned by the investment bankers in individual deals. This means that the commissions on retail and corporate banking range from low to medium whereas for investment banking they range from high to very high.