The increased access of African countries to external capital markets has rekindled interest in growing external borrowing and placed debt sustainability at the forefront of the continent's policy agenda. In this article, we discuss the conceptual link between external loans and debt challenges. In this article, the analysis is cast in the context of new sources of loans triggered by Sino–African co‐operation. The article examines the main sectors targeted for financing in Kenya, how the Chinese‐funded projects have been structured, the financial models adopted to deliver on the projects, and the overall gains from such projects. Ultimately, the article examines the external debt situation in Kenya and how Chinese loans are likely to precipitate a crisis of sustainability. The analysis shows that, although the external financial support plays a critical role in addressing the gap in Kenya's infrastructure development, the loans also pose risks of debt sustainability in the longer term, Chinese loans particularly are tied and lack transparency. The emerging debt challenges point to the need for policy reforms in favour of enhancing loans transparency and the beneficial impacts. This would enhance the repayment capacity of borrowing countries.