Fiscal federalism – the fiscal implications of a decentralized system of multi-level government – is an important component of governance in a federal or a decentralized system. Among the aspects of fiscal federalism to be assessed are the constitutional and political context, the allocation and the scope of federal, state and local revenues and expenditures, the nature and scope of intergovernmental transfers, equalization arrangements and institutional architecture for the participation of constituent units at the federal/national level. This study of fiscal federalism in the IGAD region focuses on the four member countries – Ethiopia, Kenya, South Sudan and Somalia. Although these countries have incorporated some or all principles of fiscal federalism in their federal or devolved constitution, obviously each country is unique in its own way. This study pulls together the four countries to identify the opportunities and the challenges for successful fiscal arrangements. The available theoretical and empirical literature on fiscal federalism will be assessed to identify lessons that may be drawn. In considering the lessons that may be learned, attention will be given to the criteria of equity, autonomy, accountability, political stability and intergovernmental relations between the levels of government.