If you are working for a foreign entity and must visit the United States for business reasons, you are likely permitted to visit the U.S. with a B-1 visa. The B-1 visa is reserved for those foreign nationals who are not being paid by a U.S. company and will not receive payment by a U.S. company while visiting the United States. If you want to work for and receive payment from a U.S. company you must instead apply for a United States Work Visa (for example, H-1B or H-2B). The maximum length of stay for an individual admitted on a B-1 visa is six months.
A (B-1) visa is a requirement for those individuals wishing to travel to the United States for a number of business-related reasons. It is a nonimmigrant visitor visa granted on a temporary basis. If your purpose in travelling to the United States is for one of the following reasons, then a (B-1) visa is the right option for you:
If you are not sure if you qualify for application for a (B-1) visa, check the guidelines at the visa wait times.
You may qualify for the Visa Waiver Program if you are a citizen of a number of European and Pacific Rim countries. In these cases, you will not need to file for a B-1 visa, but you will have to go through a different, simpler process.
If you enter the U.S. on a B-1 visa you are normally eligible to obtain a Green Card and gain permanent residence. People using the Visa Waiver Program, however, are not eligible to change status. This is one major advantage of obtaining a B-1 visa .