Mauritania is working to improve its public investment management framework to boost the efficiency of public investment and to make it more adaptable to climate change. support future economic growth and improvements in wellbeing. This assessment applies the IMF Climate Public Investment Management Assessment (CPIMA) framework and updates an earlier Public Investment Management Assessment (PIMA) undertaken in 2020. It finds that there have been improvements in Mauritania’s public investment management institutions since 2020, while room remains for further improvement. Like most other countries, Mauritania is at an early stage of incorporating climate aspects into public investment management. Nevertheless, some good progress has been made, notably on the planning side. This assessment provides a progressive timetable for reforms, based on international good practice, striking a balance between the stated objectives of the authorities and the existing capacities within the public administration.