The TN visa application process depends on your citizenship. Canadian citizens do not need a visa: they apply for TN status directly with U.S. Customs and Border Protection at a port of entry or a preclearance location, and the officer decides on the spot. Mexican citizens must first get a TN visa at a U.S. consulate, then present it at the border. Neither route needs a labor condition application, a lottery or a prior USCIS petition, which is why the TN is often the quickest work status for professionals from those two countries.

Before the TN application: the job and the letter

Every TN application starts with two facts. Your U.S. job must fall within one of the professions on the USMCA list, and you must meet that profession’s degree or license requirement. Our guide to which professions qualify for a TN visa lists them. The TN must also be for prearranged work for a U.S. employer or entity; self-employment is not allowed.

The core document is the employer’s support letter. It should name the TN profession, describe the duties in terms that match that profession, state the expected length of employment (up to three years), describe the pay arrangement, and list the educational qualifications or licenses the job requires and how you meet them. Our TN professional visa team drafts this letter to match the exact wording CBP and consular officers look for.

How Canadians apply

At a port of entry or preclearance

Most Canadians apply at a land border crossing or at a U.S. preclearance facility in a Canadian airport. You present your Canadian passport, the employer’s letter, your degree and transcripts (with a credential evaluation for degrees from other countries), any required license, and the CBP fee. The officer reviews the file, may ask questions about the job, and either admits you in TN status with an I-94 record for up to three years or refuses the application.

Apply well before your start date, at a time when the port is not busy, and bring originals as well as copies. A refusal at the border can usually be fixed, but it costs time and creates a record you will be asked about later.

Through a USCIS petition

Canadians may instead ask the employer to file Form I-129 with USCIS. An approved petition is then presented at the border. This route takes longer but gives the employer a decision in advance, which helps for roles likely to draw questions, such as management consultant or computer systems analyst. Premium processing is available; check the USCIS website for the current fee and timeframe.

How Mexicans apply

Mexican citizens need a TN visa stamp. You complete the DS-160 online application, pay the visa fee, book an interview at a U.S. embassy or consulate, and bring the employer’s letter, your degree and transcripts, any required license, and your passport. If the consular officer approves, you receive a TN visa and then present it at a port of entry, where CBP admits you in TN status for up to three years.

There is no USCIS petition requirement for a Mexican TN visa. The interview is the key step, so be ready to explain your job and how it fits the profession in plain words.

Changing status, extending and changing jobs

If you are already in the United States in another status, such as F-1 or H-1B, your employer can file Form I-129 to change your status to TN without leaving the country. Mexican citizens who change status inside the U.S. still need a TN visa for any later international travel.

TN status can be extended in increments of up to three years, with no fixed lifetime cap. The employer can file Form I-129 with USCIS for the extension, or you can travel and reapply at the border (Canadians) or the consulate (Mexicans). A timely filed extension with the same employer lets you keep working while USCIS decides it.

A TN is tied to a specific employer. To change jobs, the new employer must file a new I-129, or you must apply again at the border or consulate with the new employer’s letter, before you start working there. You may hold TN status with more than one employer at the same time if each one has a separate approval. If your job ends, you generally have a grace period of up to 60 days, or until your I-94 expires if that comes first, to find a new TN employer, change status or leave.

Bringing your family

Your spouse and unmarried children under 21 can join you in TD status. TD dependents may study, but they cannot work. Canadian TD dependents can apply at the border with you; Mexican and other non-Canadian dependents generally need a TD visa from a consulate. If your spouse wants to work, look at whether the spouse qualifies for TN or another status of their own.

The TN also has a long-term limit to consider: it requires temporary intent, which matters if you plan a green card later. Our post on green card options for TN holders explains how to manage that. For companies hiring across several categories, our business immigration practice can compare TN with H-1B and L-1 options for each role.

If you are a Canadian or Mexican professional with a U.S. job offer, Capitol Law Partners can prepare the employer letter and your application package so the first attempt is the only one. Schedule a consultation.

This article is for informational purposes only and does not constitute legal advice. No attorney-client relationship is formed by this communication.

Attorney Cagatay Ersoy. Practical strategy for founders, investors, and growing companies.

Need help with this topic? See our TN visa for USMCA professionals page or schedule a consultation.