Ethics is nowadays an inevitable term, thus there are new terms defined in the fields of work like business ethics, moral, social sesposibility and achieving competitive advantages which are being gained by implementing ethics into the system of an organisation. Business ethics has become a irreplacable part of business and an obligatory condition of doing long term business activity. Only Organisations that don't separate profitability from ethical values but bring them into accordance will become successful. Practising unethical behaviour can damage the reputation of an organisation what can cause negative consequences for its future image as well as weaker financial results. Theoretically speaking there are important features mentioned in order to implement ethics in undertakings such as setting clear ethical codes, implementation of a set code, regular supervision of the implementated rules as well as defining certain penalization in cases of unwanted behaviours. Supervision of business ethics demands introducing and developing a number of measures in organization and programmes focused upon ensuring the ethical behaviour of the management but also of all other employees on all organisational levels. Some of those measures and tools used in organisation activities are: leadership by example, ethical codes, ethical board, ethical representative, ethical hot line, ethical training, whistleblowers. This paper explains the benefits which organisations enjoy after having introduced ethics into their businesses and how there is a higher level of satisfaction among all participants achieved, that finally affects a better financial result. Nowadays the customers pay attention to the ethical features of their business partners which is visible from the fact that a customer will prefer to buy a product from a company known for its ethically run business. The final part of this project refers to a research undertaken in order to find out how ethical the companies are and how many unethical behaviour is there both in Croatia and worldwide.