Presently, one of the fastest developing area of business activities is IT outsourcing. That term is widely recognized by all managers in most prominent organizations. A while ago it became rather obvious, that outsourcing may be one of the key factors to have extremely successful business. As a result of that, there are plenty of outsourcing firms present on the market these days. The competition is certainly high – there are plenty of already existing one, that have pretty big experience already, (for example widely known objectivity ltd), as well as a lot of freshly opened, which are doing their best to be successful on the market. As a result of such though competition, the standard of offered services is very high. However, it seems to be important to have a quick insight into reasons why outsourcing firms becoming so attractive. Because of that, it might be easier to either decide if it is useful to use these services in a firm.