Start with the L-1B eligibility and application overview
Describe expertise and supervision together
L-1B can involve special knowledge of company products or interests and international application, or advanced knowledge of processes and procedures; unique or proprietary knowledge is not universally required. Explain who directs and supervises the actual work and whether the arrangement is prohibited labour for hire at an unaffiliated employer’s site. Begin with concrete examples: internal procedures the employee has applied, training records, projects that required the knowledge, and an explanation of why the US assignment calls for it. Hypothetical example: a laboratory-information-system company plans to place an implementation specialist with a hospital customer. The employee knows the firm’s tested conversion sequence for legacy laboratory results, while the customer controls patient-care priorities. The company must decide whether it can show that it retains supervision over the specialist’s methods and deliverables and that the assignment is not labour for hire. The statement of work, supervisor reporting line, project plan, and customer access rules answer that question.
Complete the organizational case
Establish a parent, branch, subsidiary or affiliate relationship, one continuous year of qualifying employment abroad within the three years before the petition, and active U.S. and foreign entities. For the customer-site assignment, the petitioner must control the work and the arrangement cannot be labour-for-hire. A new office needs sufficient premises and capacity to commence business; initial approval is limited to one year. L-1B stay is capped at five years. The employee must have one continuous qualifying year of full-time employment abroad within the three years before the relevant filing or admission event. Reconcile the foreign payroll with any US travel and explain the relationship between the entities before relying on the customer contract. If the assignment changes, update the control and duty evidence instead of presenting the former arrangement as current.
Apply the offsite-control rules to the customer assignment
For this customer-site case, identify who assigns, directs and supervises each material duty. U.S. visits do not count toward the qualifying foreign-employment year, but the central issue here is whether the petitioner retains control and the arrangement supplies a service rather than labour for hire. Connect that control evidence to the employee’s company-specific knowledge. At a new office, premises and financial ability must be supported by the lease, bank evidence, budget, and a credible business-start plan. The initial approval is limited to one year, and L-1B stay is generally capped at five years. These limits make it important to measure the actual deployment period before promising a customer that the same individual can remain through every future phase.
Industry certification is general skill, not specialized knowledge
Placement at a third-party site is permitted only if the employee is not principally controlled and supervised by that site's operator and the placement is not essentially labour for hire. L-1B exists for a transferee whose knowledge is special to the petitioning organization — its own product, its own process, its own equipment or techniques, or an advanced level of knowledge of how that particular company does things. A widely held certification demonstrates general industry knowledge and does not, by itself, establish specialized knowledge. The regulation asks whether the knowledge is special to the organisation or advanced within its processes, and a reviewer will not accept staffing thinness as a substitute. A new title neither creates that knowledge automatically nor necessarily marks its beginning; uniqueness and proprietary status are not universal requirements.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.