If you have ever been on a bench call and heard someone say your visa type like it explains everything about you, you already know the problem. H-1B, L-1, TN, and E-3 are not interchangeable labels. They come from different parts of the law, they tie you to your employer differently, and they treat a third-party client placement very differently depending on which one you hold.
This matters for consultants more than almost anyone else, because consulting is built on moving between client sites. The visa category you are in changes how much documentation your employer needs to produce every time you move, how long you can stay, and whether your spouse can legally take a job while you work.
None of what follows is a recommendation for one category over another, and it is not a suggestion that any employer prefers one status to another. It is a map, so you can ask better questions of your attorney and your employer.
The Basics: What Each Visa Is Actually Built For
Each of these four categories exists to solve a different legal problem, and that origin shapes everything else about it.
- H-1B is for a specialty occupation role that normally requires at least a bachelor's degree in a specific field. It is subject to an annual numerical cap, with a lottery most years for new cap-subject petitions.
- L-1 is for intracompany transferees. It exists because a multinational company wants to move an employee from its foreign office into a US office, branch, parent, subsidiary, or affiliate of the same corporate family.
- TN comes from the USMCA (formerly NAFTA) trade agreement. It is limited to citizens of Canada and Mexico working in one of the specific professional occupations listed in the agreement.
- E-3 comes from a separate US-Australia trade agreement. It is limited to Australian citizens in a specialty occupation, and in most respects it functions like a close cousin of H-1B.
Eligibility and the Employer Tie
The eligibility test is where these categories diverge hardest, and it is the part people skip when comparing them casually.
H-1B and E-3 both require a specialty occupation and a labor condition application (LCA) filed with the Department of Labor. The employer must attest to the wage and working conditions. Neither one requires any prior relationship between a foreign and US company.
L-1 is the opposite. It requires a qualifying corporate relationship, meaning the US employer and the foreign employer must be the same company or part of the same corporate family, and the worker must have at least one continuous year of qualifying employment abroad with that related entity within the three years before the transfer. There is no LCA and no annual cap for L-1.
TN requires neither a corporate relationship nor an LCA, but it is narrowly limited by nationality (Canadian or Mexican citizen only) and by occupation. The job offered has to match one of the listed professional categories in the agreement, and the degree or credential has to line up with that category.
Duration, Extensions, and Dual Intent
How long you can stay, and whether you can simultaneously pursue a green card, varies a great deal.
| Category | Who qualifies | Initial period | Extension pattern | Dual intent |
|---|---|---|---|---|
| H-1B | Any nationality, specialty occupation, cap-subject unless cap-exempt employer | Up to 3 years | Extendable to 6 years total; beyond 6 years possible once PERM/I-140 is filed under AC21 | Yes, explicitly recognized in the statute |
| L-1A (managers/execs) | Qualifying corporate relationship, 1 year abroad | Up to 3 years (1 year for new offices) | 2-year increments up to 7 years total | Yes |
| L-1B (specialized knowledge) | Same as L-1A | Up to 3 years (1 year for new offices) | 2-year increments up to 5 years total | Yes |
| TN | Canadian or Mexican citizens, listed professions | Up to 3 years | 3-year increments, no stated maximum | No, must show nonimmigrant intent at each renewal |
| E-3 | Australian citizens, specialty occupation | Up to 2 years | 2-year increments, no stated maximum | No, treaty status requires intent to depart |
The practical consequence: TN and E-3 can, in theory, be renewed indefinitely, but because they are not dual-intent categories, pursuing an employment-based green card while holding one requires careful handling with your attorney. H-1B and L-1 were built with the expectation that some holders will eventually adjust status, so filing a PERM or I-140 does not by itself jeopardize the underlying visa.
Dependent Work Authorization
This is the detail that affects household income, and it differs sharply across categories.
- H-4 spouses can apply for an Employment Authorization Document (Form I-765) if the H-1B spouse has an approved I-140, or is in H-1B status beyond the sixth year under the AC21 provisions. The EAD is not automatic; it requires its own filing and approval.
- L-2 spouses currently receive work authorization tied to their status itself under USCIS policy, meaning many do not need to wait on a separate EAD approval before starting work. This policy has shifted before, so confirm the current rule before a spouse accepts an offer.
- E-3D spouses (regardless of the spouse's own nationality) are generally treated similarly to L-2 spouses under current policy, with work authorization available through their status or a straightforward EAD filing.
- TD dependents (the dependent category tied to TN) have no work authorization at all. A TD spouse cannot legally work in the United States in that status.
Third-Party Placement: Where USCIS Looks Hardest
If you are a consultant placed at a client site through a staffing or consulting firm, this section is the one to read twice.
H-1B petitions involving third-party placement face the most developed scrutiny framework. USCIS expects to see a clear employer-employee relationship, meaning your petitioning employer retains the right to control your work: assign you, supervise you, pay you, and terminate the assignment. For placements at client sites, employers are commonly expected to provide end-client letters, statements of work, and in some cases a detailed itinerary covering the period requested.
L-1B (specialized knowledge) placements at third-party worksites draw similar scrutiny, with adjudicators focused on whether the specialized knowledge is being used to serve the petitioning employer's own business rather than simply staffing out labor to an unrelated client. L-1A placements, since they involve managerial or executive capacity, face a parallel but distinct set of questions about who actually directs and controls the work.
TN and E-3 placements at client sites are also expected to involve a genuine employer-employee relationship, but the body of specific third-party placement guidance is less developed than for H-1B. That does not mean TN or E-3 placements are immune from scrutiny, particularly for long-term, single-client engagements; it means the documentation standard is less codified and should still be built carefully with legal guidance.
Quick Reference Checklist
- Confirm your nationality lines up with the category (TN: Canada/Mexico only; E-3: Australia only).
- Confirm whether a qualifying corporate relationship exists before assuming L-1 is on the table.
- Ask whether your category is dual intent before starting a PERM or I-140 process.
- Ask your employer what third-party documentation they maintain for your current placement.
- Check the current dependent work authorization rule before a spouse accepts a job offer, since policy on L-2 and E-3D has changed before.
This article is general information, not legal advice. Work authorization rules change, and your specific facts matter. Confirm your situation with a licensed immigration attorney before making any filing decision.
If you want to talk through how any of this applies to your own case or your next assignment, the team at Josh Pros LLC is happy to have that conversation. Reach out at contact@joshpros.com or visit https://joshpros.com.
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This is general information, not legal advice. Immigration rules change and outcomes depend on your individual circumstances. Confirm anything that affects your case with a licensed immigration attorney.
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