BUSINESS VISITORS: B-1, B-2, AND ESTA (VISA WAIVER PROGRAM)

The B-1 visa allows temporary business travel to the United States, including meetings, contract negotiations, conferences and certain qualifying technical assignments.

B-1 Installation and After-Sales Service: Under 9 FAM 402.2-5(E), qualifying foreign technicians may install, service or repair commercial or industrial equipment purchased abroad or train U.S. workers to perform those services. The applicable requirements include contractual obligations, specialized knowledge and restrictions on U.S.-source compensatio

The B-2 visa permits temporary visits for tourism, family visits and medical treatment. Visitors are commonly admitted for up to 6 months and may qualify for extensions or changes of status. Unlike ESTA travelers, B-2 visitors do not waive most rights to challenge removal as a condition of admission, although expedited removal may still apply. 

Can ESTA be used for business travel?     

Yes. Eligible travelers may use ESTA for the same qualifying temporary business activities permitted under B-1, including certain technical assignments.   

ESTA is an electronic travel authorization, not a visa. It is generally valid for 2 years, with each admission limited to 90 days. Unlike a B-1 visa, ESTA involves no consular visa application or activity-specific visa annotation. VWP admission also provides less immigration flexibility and requires travelers to waive most rights to challenge removal.

The comparison below explains the advantages, eligibility requirements, permitted activities, restrictions and fees for each option.

DHS, DOJ, and DOL are increasing interagency coordination and enforcement scrutiny of foreign workers, including potential misuse of B-1 visas and ESTA. Large, high-profile U.S. projects involving foreign technical personnel face particularly significant consequences when immigration authorities question workers' activities or authorization.

Even when installation, servicing, or technical training is permitted under 9 FAM 402.2-5(E), companies may face investigations, worksite inspections, detention, and project disruption when:

• Purpose of entry: The proposed activities and legal basis for the visit are inadequately documented.
• Actual duties: Workers perform activities that differ from their stated purpose or exceed the scope of permitted business activities.
• ESTA documentation: Travelers lack the consular record or visa annotation potentially available through B-1, making independent documentation of their qualifying activities especially important.
• Project exposure: Large, high-profile, or politically sensitive projects attract scrutiny, potentially affecting hundreds of workers and substantial investments.

The critical distinction: Using ESTA instead of B-1 is not itself a violation. The risk arises when a company's documentation cannot adequately establish that its workers' actual activities comply with the applicable immigration requirements.

On September 4, 2025, federal agents conducted a major immigration enforcement operation at the Hyundai–LG battery plant construction site in Georgia. Approximately 475 workers were detained, including more than 300 South Korean nationals. Some had entered using B-1 visas or ESTA. The operation disrupted the project, resulted in approximately 1 week of detention for many South Korean workers and prompted diplomatic negotiations over the treatment of foreign technical personnel. 

The subsequent developments are particularly significant. At a September 30, 2025 bilateral meeting, the United States and South Korea reaffirmed that qualifying installation, servicing and repair of equipment purchased abroad may be permitted under B-1 classification and that eligible ESTA travelers may undertake the same activities. The governments also agreed to establish a dedicated business-visa assistance desk at the U.S. Embassy in Seoul. 

The Hyundai operation illustrates an important distinction: an enforcement action does not establish that every detained worker violated immigration law. Companies assigning foreign technical personnel to U.S. projects should evaluate each employee's actual duties, contractual obligations, compensation arrangements and immigration classification before travel.

Both routes can permit qualifying business activities. However, a B-1 application creates a consular record of the stated business purpose, and certain visas may receive activity-specific annotations. B-1 visitors may also qualify for extensions or changes of status unavailable to most Visa Waiver Program travelers. These advantages can be particularly valuable when documenting complex technical assignments, although neither classification guarantees admission or protection against enforcement. 

Both routes may permit qualifying business activities. However, a B-1 visa application creates a consular record of the stated business purpose, and certain visas may receive activity-specific annotations. Eligible B-1 visitors may also request extensions or changes of status, options generally unavailable to ESTA travelers.

For complex technical assignments, this additional documentation and immigration flexibility may be valuable. However, neither classification guarantees admission or protection against immigration enforcement.

🔷 Even when proposed activities qualify under the Foreign Affairs Manual, admission is never guaranteed. Consular officers evaluate visa eligibility, while CBP determines admissibility at the port of entry.

Companies should ensure that the employee's stated travel purpose, contractual obligations and supporting documentation accurately reflect the planned activities.