Yes, you can extend your stay in the USA with the business visa. Your business visa enables you to lengthen your duration of stay inside the United States. Obtaining an extension for your American business visa remains achievable. The B-1 visa holders within United States territory must submit Form I-539 to request an extension prior to their visa expiration date. The U.S. Citizenship and Immigration Services (USCIS) examines your extension request through a process that evaluates your business activities along with your eligibility for the extension. The extension approval process requires you to demonstrate valid reasons for an extended stay because approvals are not automatic.