Annual Membership Fees 

Low-income economies — Gross National Income per Capita of $1,135 or less in 2022

Lower middle-income economies — Gross National Income per Capita between $1,136 and $4,465

Upper middle-income economies — Gross National Income per Capita between $4,466 and $13,845

High-income economies — Gross National Income per Capita of $13,846 or more