A document prepared for the September meeting of UNESCO's Executive Board states:
Since 80% of the total of contributions assessed for 2009 was payable by the 12 largest contributor Member States, the dates when these major contributions are received are of crucial importance for the Organization’s cash situation. The first table gives summarized information on the contributions of these 12 Member States as at 30 June 2009:
The assessed contributions for 2009 are $316 million, and were due in January. Thus the U.S. arrears represent a considerable portion of the funding of the organization, and must been seen as causing considerable difficulties in management and performance.