Tanzania boasts one of the highest rates of economic growth in Sub-Saharan Africa. In the last decades it also established one of the most harmonised donors frameworks. However, the relationship between Tanzania and its donors has deteriorated significantly in recent years following several high-level corruption cases and slow progress on more complex governance reform. In response, the EU has reformed the composition of its development assistance modalities, which predominantly entailed a reduction in Budget Support, and has stopped committing further aid to Tanzania for the time being. These events indicate considerable limitations to the effectiveness of the EUs (and other donors’) measures to induce good governance through existing modi of development cooperation.