Various stakeholders in science have put research integrity high on their agenda. Among them, research funders are prominently placed to foster research integrity by requiring that the organizations and individual researchers they support make an explicit commitment to research integrity. Moreover, funders need to adopt appropriate research integrity practices themselves. To facilitate this, the authors of this article recommend that funders develop and implement a Research Integrity Promotion Plan (RIPP). This Consensus View offers a range of examples of how funders are already promoting research integrity, distils 6 core topics that funders should cover in a RIPP, and provides guidelines on how to develop and implement a RIPP. The authors believe that the 6 core topics put forward will guide funders towards strengthening research integrity policy in their organization and guide the researchers and research organizations they fund.