Nowadays, one of the fastest developing field of business activities is IT outsourcing. That term is widely knowns between all managers in most prominent organizations. Not long ago it became rather clear, that outsourcing might be one of the key factors to develop extremely successful business. Because of that, there are a lot of outsourcing firms present on the market those days. The competition is really high – there are many already existing one, which have rather big experience already, (for example widely known objectivity ltd), as well as a lot of freshly opened, which are trying to do their best to be successful on the market. Thanks to such hard competition, the level of offered services is extremely high. Nevertheless, it seems to be important to have a quick look at reasons why outsourcing companies becoming so fashionable. Thanks to this, it might be easier to either make a decision if it is worth to use those services in a firm.