Low Income, Lower-Middle Income, Upper-Middle Income Economy Countries - Full membership is available for a reduced fee of $70 (US) per year for individuals residing in low, lower-middle and upper-middle economy countries. For the current 2025 fiscal year, low-income economies are defined as those with a GNI per capita, calculated using the World Bank Atlas method, of $1,145 or less in 2023; lower middle-income economies are those with a GNI per capita between $1,146 and $4,515; upper middle-income economies are those with a GNI per capita between $4,516 and $14,005; high-income economies are those with more than a GNI per capita of $14,005.
Low Income, Lower-Middle Income, Upper-Middle Income Economy Countries - Supporting membership is available for a reduced fee of $70 (US) per year for individuals residing in least developed countries. For the current 2025 fiscal year, low-income economies are defined as those with a GNI per capita, calculated using the World Bank Atlas method, of $1,145 or less in 2023; lower middle-income economies are those with a GNI per capita between $1,146 and $4,515; upper middle-income economies are those with a GNI per capita between $4,516 and $14,005; high-income economies are those with more than a GNI per capita of $14,005.
Low Income, Lower-Middle Income, Upper-Middle Income Economy Countries – Student membership is available for a reduced fee of $15 (US) per year for individuals residing in least developed countries. For the current 2025 fiscal year, low-income economies are defined as those with a GNI per capita, calculated using the World Bank Atlas method, of $1,145 or less in 2023; lower middle-income economies are those with a GNI per capita between $1,146 and $4,515; upper middle-income economies are those with a GNI per capita between $4,516 and $14,005; high-income economies are those with more than a GNI per capita of $14,005.
APPROVED BY THE BOARD OF DIRECTORS ON JUNE 16, 2016