Globalization and economic growth have driven inter-company transactions to new heights. It’s estimated that more than 2/3 of all business transactions worldwide occur within groups. In particular, developing countries are observing immense growth in intra-group transactions because their economies are still in the process of opening up and attracting large amounts of FDI. So, it’s of immense importance to halt challenges posed to both national & world economies through controlled transactions. In this article, I briefly discussed the conceptual introduction of transfer pricing, the arm’s length principle, transfer pricing methods recognized under OECD & UN transfer pricing guidelines, and Ethiopian tax law. Finally, I tried to address whether the Ethiopian Transfer pricing law & regulation accords or contradicts with OECD & UN transfer pricing manual.