Marrying an American as a Canadian: Should You Adjust in the U.S. or Process Through Montreal?

You married an American, or you are about to, and now you are trying to work out how a Canadian actually becomes a permanent resident of the United States without a costly mistake. It is a big decision, and the fact that you are researching it this carefully tells me you already grasp the stakes. Canadian law matters here more than people expect, because the recent passage of Bill C-3 changed what citizenship your future children can inherit, and that reaches straight into where you choose to live.

You are also in very common company. Immediate relatives of U.S. citizens consistently make up the single largest category of people who receive green cards each year, according to Migration Policy Institute analysis of federal data, with spouses forming the biggest portion of that group. Your real task is to pick the route that fits your life rather than the one that sounds fastest on a forum.

For a Canadian, the decision tree still looks different from what most immigration blogs describe. As a Canadian citizen, you can generally seek admission to the United States for a temporary visit without first obtaining a visitor visa, you have a consulate in Montreal that handles these cases, and you get a real choice between adjusting status inside the country or processing through Canada, and each of those advantages carries its own quiet trap.

Why Bill C-3 Belongs in Your U.S. Marriage Decision

It seems strange that a Canadian citizenship law would shape a United States green card plan, yet it does. Under recent changes to Canada’s Citizenship Act (enacted under Bill C-3 following court rulings challenging the old first-generation limit), the rules for passing citizenship to children born abroad have fundamentally shifted. It reworked the old first-generation limit that had blocked many Canadians born abroad from passing citizenship to their own children born outside Canada. The new framework establishes a substantial connection test rooted in the Canadian parent's physical presence in Canada.

That rule reaches your family plan directly if you were born or adopted outside Canada. If you move to the United States and raise children there, whether they can claim Canadian citizenship can depend on your own ties to Canada. Specifically, under Bill C-3, if you were yourself born or adopted outside Canada and your child is born or adopted outside Canada on or after December 15, 2025, you generally must demonstrate at least 1,095 cumulative days of physical presence in Canada before the child's birth or adoption. If you were born or naturalized in Canada, this particular substantial-connection requirement does not apply to your child. In the ordinary case, your child can acquire Canadian citizenship by descent, subject to the other rules of the Citizenship Act.

Adjusting Status Inside the U.S.: The Path That Feels Easy and Can Backfire

Because Canadian citizens can generally seek admission for temporary visits without first obtaining a visitor visa, adjusting status can appear like the obvious move. You enter, you file the marriage petition and the green card application together, and you wait for your card while living with your spouse, which is exactly what most newly married couples want.

The complication sits at the border crossing itself. If you enter as a visitor while you already intend to stay and file, an officer can later treat that entry as misrepresentation. The often-cited ninety-day rule is a Department of State framework, not an automatic USCIS rule that says marrying and filing for adjustment within ninety days is fraudulent. Timing can be relevant evidence of what you intended when you entered, but timing alone does not establish misrepresentation.

A second cost bites too, since once you file you generally should not leave the country without advance parole while your adjustment application is pending, because departing without it can result in abandonment of the application. And unless you already have independent U.S. work authorization, filing the adjustment application does not itself authorize you to work—though you can file for a temporary Employment Authorization Document (EAD) alongside your application to work while you wait—so you may sit idle initially while your American spouse carries the household.

Consular Processing Through Montreal: A Different Path with a Period of Separation

Consular processing runs the opposite way, and for some Canadians it may fit their circumstances better. You stay in Canada, your spouse files the marriage petition, the case moves to the National Visa Center, and eventually you attend an immigrant visa interview at the United States Consulate in Montreal. You keep your Canadian job and can generally continue living in Canada while you wait, while maintaining provincial benefits if you continue to meet the applicable requirements.

When your interview succeeds, you enter the United States on a spousal immigrant visa, known as the CR1 or IR1 category, and you become a permanent resident when you are admitted. CR1 generally applies when the marriage is less than two years old at the time of admission, while IR1 applies when the marriage is at least two years old. You can work as a permanent resident without waiting for a separate employment authorization document, you generally do not need advance parole, and you complete the medical exam with a panel physician right here in Canada. One of the major tradeoffs is the possibility of separation while the immigrant-visa process is pending.

The Danger of Entering as a Visitor to Stay

The most damaging mistakes rarely come from picking the wrong route, but from entering as a visitor, quietly deciding to stay, and filing to adjust without thinking about how that entry will read to an officer later.

Picture a Canadian who flies to visit her fiancé in Michigan, marries during the trip, and files to adjust three weeks afterward. The marriage is real and the love is obvious, yet the timing can draw scrutiny about what she intended when she entered. That can lead to additional questions, requests for evidence, additional legal work, or, if there is a genuine inadmissibility issue, more serious consequences.

Now picture a couple who plan ahead. She keeps living in Windsor, he files the petition, and they treat the Montreal route as a project with a clear finish line. They see each other on weekends because the border sits right there, she keeps earning income throughout, and she arrives in the United States already cleared to work. Their case may take a different amount of calendar time, but the couple can plan around a more clearly defined immigration process while the Canadian spouse remains in Canada.

How a Cross Border Firm Reads This Differently

A United States only lawyer maps your green card and stops there. A Canada only lawyer will not touch your American filing at all. A firm licensed in both countries looks at the whole picture, including what leaving Canada does to your taxes, your registered accounts, and your children's future citizenship under Bill C-3.

That combined view changes real decisions. Whether you keep enough physical presence in Canada to protect your children's citizenship, when you might trigger potential Canadian departure-tax consequences, and how you time your move around your work permit all sit on the border between two legal systems, which is exactly where the Bill C-3 changes and your U.S. immigration plan finally connect.

Questions Canadians Often Ask Us

Can I just move in with my spouse in the U.S. and file from there? 

You can file to adjust status if you were lawfully admitted and otherwise qualify, though the safer question is whether you truly should. If you entered as a visitor while already planning to stay, that entry can be challenged later as misrepresentation, so get advice before you cross rather than after you file.

What is an A number and do I even have one yet? 

Your A-number is your Alien Registration Number, a unique identifier used for your U.S. immigration records. You may not have one before your immigration case begins. Depending on the type and stage of your case, it can appear on USCIS correspondence or, in an immigrant-visa case, on documents provided during visa processing.

Does it matter whether my spouse is a U.S. citizen or a green card holder? 

Yes. A U.S. citizen can petition for a spouse as an immediate relative, a category not subject to annual visa limits. A green card holder's spouse falls into the F2A family-preference category, which is subject to annual limits and can involve a wait for an immigrant visa number. That difference can significantly affect your timeline.

Will Bill C-3 make my future children Canadian if we live in the U.S.? 

It can, depending on your circumstances. If you are a Canadian citizen who was yourself born or adopted abroad and your child is born or adopted outside Canada on or after December 15, 2025, the new rules generally require you to demonstrate at least 1,095 cumulative days of physical presence in Canada before the child's birth or adoption. If you were born or naturalized in Canada, this particular Bill C-3 substantial-connection requirement does not apply to your child. In the ordinary case, your child can acquire Canadian citizenship by descent, subject to the other rules of the Citizenship Act.

You Do Not Have to Guess Your Way Through This

Feeling nervous about all of this is completely reasonable, because you are weighing a decision that touches your marriage, your money, and your ability to be near the person you love. The reassuring part is that this process is well mapped, and the gap between a stressful case and a smooth one usually comes down to planning the entry and the route before you act.

You do not have to figure out alone whether to adjust inside the United States or process through Montreal. If you want a clear read on the right path for your marriage, and on how Bill C-3 fits your family plan, book a consultation with attorney Emilia Coto at Sisu Legal at https://sisulegal.com/pages/booking-immigration-law-windsor-troy. We practice law on both sides of the border, so you get one team seeing the entire picture instead of two lawyers who each see only half of your life.