With one exception, travelers who have arrived in the United States can renew or extend their legal permission to stay by applying to the Immigration and Naturalization Service. The exception is that travelers admitted without a visa under the visa waiver pilot program cannot seek an extension of stay within the United States and must depart no later than 90 days after entry. Business visitors in the B-1 classification may be admitted for not more than 1 year and may be granted extensions of stay in increments of not more than 6 months each. In some cases, the original visa will still be valid, and can be used for re-entry. If the original visa has expired, the traveler will need to apply for a new visa at a U.S. embassy or consulate.
Some offices require payment by money order, or prior payment at a designated bank.
Travelers should contact the office where they intend to apply for more information. In addition, nationals of some economies may be charged a fee when the visa is issued. These fees vary according to nationality and classification of visa. They are based entirely on reciprocity, and are only charged to nationals of economies that charge U.S. citizens for visas. Regulations relating to accompanying dependants Family members must submit individual visa applications to accompany a business traveler.