The Base Erosion and Profit Shifting (BEPS) Project of the Organisation for Economic Co-operation and Development (OECD) and the G20 aims to reduce harmful tax avoidance and evasion by multinational enterprises (MNEs), which creates large losses in governments’ revenues. In times of multiple crises, many governments urgently seek additional revenue sources to finance public expenditures for sustainable development. In particular, many low- and lower-middle-income countries have tax-to-GDP ratios of less than 15 per cent, which is insufficient to provide basic public goods such as health, education and infrastructure for their populations. This policy brief evaluates the achievements and remaining challenges of the BEPS Project to mobilise more domestic revenues, in particular in low- and middle-income countries (LMICs).