Increasing access to basicinfrastructure services is critical to reducing poverty andenabling poor and marginalized people to participate in andbenefit from economic development. Too often, however, thegap between the cost of the initial service connection and auser’s ability to pay for that connection prevents the poorfrom availing of basic services. Output-based aid (OBA), aform of results-based financing (RBF), addresses this gap,supporting poor people in accessing services such ashousehold connections to the water supply or electricitygrid, renewable energy systems, or solid waste management.By promoting the inclusion of people who may otherwise beleft out of development gains, as well as encouragingutility sector reform, OBA supports the goal of universalaccess to basic services, one of the aims of the SustainableDevelopment Goals. This paper highlights the BA experiencein infrastructure so far and the results achieved.