In this study, we take stock of fee-free secondary education (FSE) initiatives in sub-Saharan Africa and review their impact on equitable access and achievement, as well as their cost-effectiveness. We begin by discussing the theoretical arguments for and against the abolition of secondary school fees. Second, we examine aggregate statistics on enrollment and transition rates and find that primary school completion remains far from universal in most countries in the region, meaning that most low-income children are currently ineligible for fee-free secondary education. Third, we provide a comprehensive overview of the existing FSE policies in sub-Saharan Africa, showing that almost half of all countries in the region have abolished secondary school fees in the last 2 decades. Finally, we systematically review empirical evidence on the impact and effectiveness of recent FSE initiatives. Our review suggests four concrete recommendations for policymakers that are broadly aligned with the principle of "progressive universalism" in improving access to education.