The majority of Costco locations are not unionized. The non-union locations have revisions to their Costco Employee Agreement every three years concurrent with union contract ratifications in locations with collective bargaining agreements. Similar to a union contract, the Employee Agreement sets forth such things as benefits, compensations, wages, disciplinary procedures, paid holidays, bonuses, and seniority. As of March 2008, non-supervisory hourly wages ranged from $11.00 to $20.50 in the United States, . In the US, eighty-five percent of Costco's workers have health insurance, compared with less than fifty percent at
Walmart and Target.