Your wife will need to pay the Green Card fee to USCIS before she comes to the U.S. This fee is charged by USCIS to create the actual green card. The fee is $165 and is paid online at: http://www.uscis.gov/forms/uscis-immigrant-fee.
Gardner and Taylor is a boutique business and family immigration law firm located in Salt Lake City, Utah. We focus solely on United States immigration matters and provide a variety of comprehensive legal services for businesses, families, and individuals.