The strategic leveraging of multiple financial flows is an important piece of the puzzle when it comes to implementing the Agenda 2030 and its Sustainable Development Goals (SDGs). The funding model, largely dominated by hard earmarking — funds channelled through projects — cannot fully deliver the SDGs. The short-term and sectoral nature of earmarked project funding weakens opportunity for building long-term, sustained and strategic partnerships that can drive transformative change. Flexible investment, when available in the right balance, quality and scale, can help reduce transaction costs, reduce fragmentation, create synergies and coherence. This article highlights some results from a successful flexible multi-partner mechanism (FMM) towards achieving transformative change.