From Green Card to Oath: US Citizenship for Canadians

You can roll up to the Peace Arch crossing with a driver’s licence, a trunk full of coffee, and no visa in sight. That’s the lovely lie of being Canadian in America. Visiting is almost frictionless. Staying is not. And turning a green card into a US passport is a completely separate journey – slower, paper-heavy, and governed by rules nobody mentions at the border booth.

So here’s the honest map. There’s no Canadian express lane. No trade-agreement clause that quietly hands out citizenship. No ‘we’ll just keep renewing the TN visa’ trick that ends in a navy-blue passport. What exists are four real doors, one finish line, and a handful of traps that catch Canadians specifically. Let’s walk through all of it.

Start Here: You Need a Green Card First

US citizenship for a foreign national almost always runs through a single gate: lawful permanent residence. Green card first, passport later. The only exception is people who were already citizens at birth without realising it, and we’ll get to that in a moment.

Every other path looks the same in outline:

• Get a green card through family, employment, investment, or a special category.
• Hold it long enough – usually five years, three if you’re married to a US citizen.
• Pass the naturalization interview and the civics test.
• Take the oath and apply for a US passport.

Canadians get no shortcut at any of those steps. What you do get is a chargeability advantage. US immigration caps green cards per country, and Canada sits in the ‘all other countries’ bucket, which is almost always current. If you were born in India or China, employment categories can mean a wait of a decade or more. As a Canadian, you’re mostly waiting on processing speed, not on quota.

The Four Doors Into Permanent Residence

Door 1: A US Citizen Parent (You May Already Be One)

Before anything else, check this. If you were born to at least one US citizen parent who met the physical presence requirements before your birth, you may already be an American. No green card, no test, no oath. The rules differ depending on whether you were born in or out of wedlock and whether one or both parents were citizens. The same logic applies if you were born abroad and became a citizen automatically when a parent naturalized while you were a minor.

The paperwork is Form N-600, Application for Certificate of Citizenship, or a US passport application if you can document the claim. Plenty of Canadians in their forties stumble across this while cleaning out a filing cabinet. It’s worth a twenty-minute check before you spend years chasing a green card you never needed.

Door 2: Marriage to an American

The most common route, and often the fastest. Spouses of US citizens are ‘immediate relatives,’ which means no annual cap and no queue. A Canadian married to an American can typically land a green card in roughly 12 to 20 months through consular processing – faster if you’re already living in the US and file for adjustment of status.

Then comes the bonus. Once you’ve held that green card for three years while living in genuine marital union with your spouse the entire time, you can naturalize instead of waiting five. Three years, not five. Marriages entered into suspiciously close to a filing date get extra scrutiny, so keep your lease agreements, joint accounts, photos, and travel records. USCIS is not naive.

Door 3: Employer Sponsorship (And the TN Trap)

This is where Canadians get clever and then get stuck. TN status under the US-Mexico-Canada Agreement is wonderfully easy – show up at the border with a job offer letter and a degree, get three years. But TN is a nonimmigrant status. It presumes you’ll go home. Filing for a green card while on TN can raise intent questions, and the standard fix is to switch to H-1B first, which does allow dual intent.

The real sponsorship route runs: employer files PERM labour certification (currently a year or more), then an I-140 immigrant petition, then either adjustment of status or consular processing. For a Canadian born in Canada, the visa bulletin is usually current, so the bottleneck is bureaucracy rather than backlog. Budget two to four years from start to green card, sometimes longer.

Door 4: Extraordinary Ability or Investment

Two faster but narrower lanes. EB-1A is for people at the top of their field – you’ll need to prove sustained national or international acclaim through evidence like major awards, press coverage, judging the work of others, or a notably high salary. No employer required, and you can self-petition.

EB-5 is the money route: invest at the required threshold in a US business that creates at least ten full-time jobs for US workers, often through a regional centre. Expect a multi-year wait and heavy source-of-funds documentation. Neither is a shortcut for the average person, but both genuinely exist.

One option Canadians should cross off entirely: the Diversity Visa lottery. Canada is on the list of countries whose natives are not eligible, precisely because so many Canadians have historically immigrated to the US. No DV entries for you.

Side by Side: Which Path Actually Fits You

The Finish Line: What Naturalization Actually Asks

Once you’ve held a green card for five years – or three, if you’re married to and living with a US citizen – you file Form N-400. The requirements are less about paperwork and more about behaviour:

• Continuous residence. Long trips matter. Absences of six months or more can break your continuous residence, and a single absence of a year or more breaks it outright unless you filed for a re-entry permit or qualify for an exception.
• Physical presence. You must actually be inside the US for at least 30 months of those five years, or 18 months of the three. Snowbirds who winter in Arizona and summer in Ontario sometimes fail this by accident.
• Good moral character. No serious crimes, no lying to immigration, no unpaid taxes, and no skipping Selective Service registration if you were a male between 18 and 26 living in the US.
• English and civics. A speaking, reading, and writing test plus a civics exam. Exemptions exist: at 50+ with 20 years as a permanent resident, or 55+ with 15 years, you skip the English test. At 65+ with 20 years, you get a shorter civics list and can test in your native language. The civics test itself was updated in late 2025 with a larger question bank, so study the current version rather than a decade-old flashcard set.
• Attachment to the Constitution. Essentially: are you willing to support the United States and its laws.

What It Costs and How Long It Takes

The N-400 filing fee runs about $710 online or $760 on paper, including biometrics. Add the cost of the entire green card journey before it, which can range from a few thousand dollars in government fees to tens of thousands once you layer in lawyers, medical exams, and years of waiting.

From filing N-400 to the oath ceremony, plan on roughly six to twelve months in normal conditions, longer if your field office is backlogged or your case gets flagged. Then you’re sworn in, you hand back your green card, and you can apply for a US passport within days.

Three Things Canadians Always Get Wrong

You don’t lose your Canadian citizenship

Canada permits dual citizenship, and so does the United States. Naturalizing in the US does not strip your Canadian passport. You can hold both, travel on either, and live in either – though entering the US as a citizen requires a US passport, not your Canadian one.

US citizens file US taxes forever

This is the part nobody warns you about. Once you’re a US citizen, you file US tax returns on your worldwide income for life, no matter where you live. Yes, even if you move back to Toronto. You may owe nothing thanks to foreign tax credits and the foreign earned income exclusion, but you still file. FATCA and FBAR reporting on foreign accounts adds another layer. Some dual citizens eventually ren