HUPO membership is based on the calendar year (January 1 to December 31). If you join or renew mid-year, benefits begin with date of dues payment until the end of the same year.
All membership rates are established in a 3-tier sliding scale directly tied to the yearly classification of the World Bank Economies of countries (i.e. High Income countries, Middle Income countries and Low Income countries). See the World Bank 2015 List of Economies for detailed information.