This thesis discusses tariff regulations and legal views on business competition regarding tariff Limit in Islamic perspective, tas'ir (pricing) is one practice that is not permitted by Islamic Sharia. Al- Quran and Hadith are guidelines and legal umbrella for the Muslim community in the world. This study aims to discuss the Islamic view of the rules and tariff restrictions in competition in the business world. In this study, the authors conducted a normative study using the perspective approach and the statute approach analysis. A good transaction in Islam is based on willingness between the seller and the buyer, including in terms of pricing. The Islamic Business Competition System recognizes the freedom of every individual to carry out economic activities without harming others, where each individual is instructed to use his property to meet his needs and improve his life in a way that does not conflict with the benefit of society. Because the main goal of the Islamic economy is that human economic relations stand on the foundation of mutual cooperation, mutual love, honesty, and justice.