In many African countries, official development assistance is still as high as 30% of national income. Reducing dependency on aid and increasing the domestic tax base is a national priority for a number of these countries. For a sustainable transition, governments need to spend external resources in the most efficient and effective manner, while strengthening country systems. Against this backdrop, the importance of using country systems lies on the fact that the lack of integration of aid in a country’s systems and procedures undermines key financial management principles: comprehensiveness, fiscal transparency, and accountability. CABRI seeks to support a country’s capability to better integrate aid into the budget process and to promote more effective use of country systems by development partners.