Microinsurance can be an effective complement to existing menus of social protection programs. A flexible and powerful instrument, microinsurance (MI) reduces vulnerability and mitigates the negative effects of external shocks on poor households. However, microinsurance programs require well-developed institutional arrangements in order to run in an efficient and effective manner. Such conditions can be difficult to find in low-income countries. Social Funds can help bridge this gap, standing as a platform to organize and deliver microinsurance products. This Social Funds Innovations Note introduces some of the primary design principles behind microinsurance program development, highlighting cases of best practice, and suggests how Social Funds can be used to deliver microinsurance services more effectively to poor households.