TN visa: the three-year route for Canadian and Mexican engineers, and where it stops

Who can get a TN, and who cannot?

The TN is narrow by design. It wants two nationalities, a profession on a fixed list and a job already waiting. If any one of those is missing the category is closed, and no amount of experience reopens it.

Start with citizenship, because it is the one test nothing else can repair. Only citizens of Canada and Mexico qualify, so a permanent resident of either country does not. That is worth checking before you read further.

A Canadian permanent resident who has not naturalised sits in the same position as anyone else outside the two countries. The passport decides the question, not the address on your driving licence or the length of your career.

Next is the profession. The role has to be on the USMCA professions list, which is specific rather than general, and being a professional is not the same as being named on it. The list is short and it is published.

Then the job. You need a prearranged full-time or part-time position with a United States employer, which means an offer in hand rather than a plan to look once you arrive. The offer is what the file hangs from.

Then the qualification attached to that profession. Each entry on the list carries its own requirement, and an engineer needs a bachelor's degree in the field rather than adjacent experience. A degree is evidence, and experience is argument.

That is the whole gate. Four tests, all documentary, and none of them about how impressive your career has been or how badly a company wants to hire you. The officer applies them in that order.

There is no annual numerical cap, so the category does not run out of numbers partway through a year. That absence of a limit is the main reason people reach for the TN before anything else.

The trade you are making is duration and intent. You get a category that is quick to use and awkward to keep, because it was built for temporary entry rather than for settlement. That trade runs through everything below.

Which professions are on the USMCA list?

The list is the part people skim, and it is where most hopeful applications end. It is a schedule of named occupations, and the officer checks your role against that schedule rather than against your CV.

It is not a test of whether the work is professional. A role can be skilled, well paid and obviously professional in the ordinary sense and still not appear anywhere on the list. That is where experienced people get caught.

It is also not a test of your employer's industry. The question is what you will actually do, described in the vocabulary the schedule uses, not what the company sells. Write the duties plainly and let the title follow them.

Engineers appear on the list with a specific requirement attached. A bachelor's degree in the field is what the entry asks for, and years of relevant experience are not a substitute for it. The degree has to be in the field.

That is why the job description carries so much weight. Two people at the same company can end up on opposite sides of the line depending on how their duties are written and titled. The duties decide the category.

Write the description in the schedule's words, but only where those words are true. An inflated title that the duties do not support is the easiest thing in the file to test, and it is tested often.

The degree has to match the work as well as the list. An engineering degree attached to a role that is mostly sales raises a question, and the file has to answer it rather than hope the officer skips it.

If your occupation is not on the list, the TN is not a stretch or a matter of judgement. It is simply unavailable to you, and the useful move is to look at a category that fits the work you actually do.

That is a hard sentence for people who have spent a decade in a role the schedule never contemplated. It is also why testing the question early is cheaper than building a file first and finding out at the window.

How does a Canadian apply at the border?

A Canadian citizen can apply directly at a port of entry, and no petition is filed with USCIS beforehand. That single feature is what makes the category fast enough to be useful for a job starting next month.

You arrive with the offer letter, the degree evidence and the supporting documents, and an officer decides there and then. There is no waiting room between the application and the answer, and no chance to add a missing page.

Because the decision happens at the border, the file has to be complete on the day you travel. There is no round of written correspondence to repair a missing transcript afterwards, which is the difference from a consular case.

Take the originals and a copy of each document. Officers read paper, and a folder that takes five minutes to assemble sets the tone for everything that follows. Bring the transcript, not only the certificate.

The employer letter does the most work. It should describe the duties, the salary, the location and the dates, in language that matches the profession as it appears on the list. Vague letters invite questions you cannot answer.

Expect questions about intent, because that is what the category turns on. The interview is short, and the officer is deciding whether you are coming temporarily for a specific job rather than moving for good.

You can be refused at the port, and the refusal is recorded. That is not the end of the world, but it is a strong reason to prepare properly rather than improvise at the booth with a folder assembled in the car.

The status you receive is recorded on your I-94 arrival record, and the date on it governs everything that follows. Check it before you leave the airport rather than a month later, when the mistake is harder to fix.

That date is also when your renewal planning begins, because the three-year clock runs from the day you were admitted and not from the day you signed the offer letter. Two dates, and only one of them matters.

Why is the Mexican route different?

A Mexican citizen needs a TN visa before travelling, and that visa is issued at a consulate. You cannot simply present yourself at the border and be admitted into the classification, however strong the offer letter is.

The underlying test is identical. The list is the same, the qualification is the same and the periods run to 3 years in both routes; what changes is the building where the decision gets made, and how long it takes.

The consular process has its own steps. A DS-160, the visa fee, an interview where one is required, and then either issuance of the visa or a refusal on the day. Book the appointment before you agree a start date.

That sequence adds time and adds a record. A refusal at a consulate is a decision that may follow you into later applications, which is a different cost from a simple delay of a few weeks.

It also gives you something a border refusal does not. A consular officer who wants more information can refuse under INA 221(g), which is not a final decision on the case. It is a pause, and it is meant to be temporary.

A 221(g) refusal means the case is pending further information or administrative processing. There is no fixed deadline attached to that, and the uncertainty is the frustrating part. Ask the consulate what is outstanding, then wait.

A port of entry does not offer the same pause. A Canadian refused at the border usually has to leave, rebuild the file and try again on another day, which is harder to plan around when a job is waiting.

Practically, Mexican applicants should assume weeks rather than hours, and should agree a realistic start date with the employer before the consulate appointment is booked. An offer letter with a fixed start date is a trap.

The employer letter does the same work in both routes, so the drafting effort is not wasted if circumstances push you from one route to the other. The words rarely need rewriting, only redating.

How do you renew, and how long can this run?

Admission is granted in increments of up to 3 years. The category never hands you an open-ended stay, and the end date is written on your arrival record from the first day you use it.

The regulation provides for applying for a new three-year period of admission at a designated port of entry before the current period expires. That is the renewal mechanism, and it is deliberately simple. The simplicity is also the trap.

The emphasis is on before. Turning up after the end date is a different conversation with different consequences, and usually a worse one than a renewal filed a month early. A late renewal is a new application in substance.

The renewal is not automatic. You are asking for the category again, which means the offer, the duties and the qualifications all have to be current rather than historical documents from the first filing.

Some things will have changed. Your role may have grown, your employer may have been acquired, and the description that worked three years ago may no longer describe what you do. Say what changed and attach the evidence.

Update the letter rather than resubmitting it. An officer who sees a document dated three years ago will ask what has happened since, and the answer should already be in the file rather than improvised at the window.

Nothing in the structure caps the number of successive periods you can request. In that narrow sense the category can run for as long as the job lasts and the intent holds up under questioning.

In practice the limit is intent, not arithmetic. Each renewal is a fresh statement that you are coming temporarily, and a file that reads as a permanent life invites a question that no letter can answer.

For a Mexican applicant the renewal starts at the consulate, because the visa has to be valid to seek admission. The three-year period is the status, and the visa in the passport is a separate document with its own dates.

Why is immigrant intent a problem on a TN?

The TN is a temporary entry category, and immigrant intent is inconsistent with it. That sentence is short, and it decides a large share of the difficult cases that end in a refusal. Everything else here follows from it.

At every application you are representing that you are coming for a temporary period to do a specific job. A pending green card application says something different about your plans, and the officer is entitled to notice the difference.

The refusal that usually appears is under INA 214(b), which is a failure to establish entitlement to nonimmigrant status. It applies to some categories far more sharply than others, and the TN is one of the sharper ones.

The TN is one of the places where it bites hardest, because the whole category rests on temporary entry. An officer has to be satisfied about intent, and cannot set the question aside because the job offer is genuine.

None of this means a green card is impossible. It means the two cases have to be sequenced, and the sequence is a legal question rather than a matter of personal preference. Get that advice before the first filing.

The common mistake is filing for permanent residence and then applying for a TN at a port of entry a few months later, without thinking about how the two look side by side to the officer reading them.

A refusal under 214(b) is not a ban. It is a decision that on that day, with that file, you did not establish entitlement to the status you were asking for at the window. The next application starts from nothing.

It still costs you something real. You lose the trip, you may lose the start date, and the next application has to answer the same question with a visibly better answer than the last one.

If your long-term plan is a green card, say so to whoever advises you before the TN is filed. The order of the filings is often the strategy, and it is much harder to fix once the first one is on record.

Questions this raises