Investment in all the drivers and facilitators of hand hygiene action in health care to ensure that it occurs at the point of care and other critical moments requires a multidisciplinary, multifaceted approach. WHO describes such an approach as a “multimodal improvement strategy” (MMIS) which is at the core of its implementation models for hand hygiene and infection prevention and control (IPC) programmes. The focus of this document is on the resource considerations for investing in hand hygiene improvement in health care (primary, secondary and tertiary) using the MMIS approach.