Business travelers who are staying the U.S. for more than 90 days, or frequently visit the U.S. need a B-1 visa. It is possible for a B-1 visa to be issued with a validity ranging from one to ten years. It is important to note that all B-visas falls under the nonimmigrant category.
Business travelers intending to stay in the U.S. for less than 90 days can apply for the Visa Waiver Program (VWP). Since the same regulations apply to VWP travelers, it is important that they be informed about the B-1 visa process as well. Please note that travelers whose nationality is excluded from the VWP will always need a visa.