Yes, you can be both a Canadian and a U.S. citizen at the same time. Both countries permit dual citizenship, and neither requires you to give up one when you acquire the other. The status is common, legal, and often automatic at birth — but it comes with a tax and reporting load on the U.S. side that catches many people off guard, so it pays to understand what you are signing up for before you assume the arrangement is purely upside.
How People End Up Holding Both
Three routes lead to dual U.S.-Canadian citizenship: being born on one country’s soil, inheriting citizenship from a parent, or naturalizing later in life.
Birth is the simplest. The Fourteenth Amendment makes almost anyone born on U.S. soil a U.S. citizen, with narrow exceptions for children of foreign diplomats.1Constitution Annotated. Amdt14.S1.1.2 Citizenship Clause Doctrine Canada applies the same principle to almost anyone born on Canadian soil. A child born in the U.S. to Canadian parents picks up both citizenships automatically, and the reverse is equally true.
Citizenship by descent is more complicated. A child born outside the United States to a U.S. citizen parent can acquire American citizenship at birth if the citizen parent lived in the U.S. long enough beforehand. Where both parents are citizens, one must have resided in the U.S. at some point before the birth. Where only one is a citizen, that parent must have been physically present in the U.S. for at least five years, with at least two of those years after age 14.2U.S. Citizenship and Immigration Services. U.S. Citizenship at Birth for Children of U.S. Citizens Born Outside the United States
Canada’s descent rule changed recently. Citizenship by descent used to stop at the first generation born outside Canada. On December 15, 2025, Bill C-3 took effect and relaxed that limit: a child born abroad on or after that date to a Canadian parent who was also born abroad can now be Canadian, provided the Canadian parent spent at least 1,095 days physically in Canada before the child was born.3Government of Canada. Change to Citizenship Rules in 2025 For children born before that date, the old first-generation limit still generally applies.4Government of Canada. Check if You May Be a Citizen
Naturalization is the third route. A Canadian who wants U.S. citizenship must first hold a green card, then apply on Form N-400 after five years as a permanent resident (three if married to a U.S. citizen). The filing fee is $760 by paper or $710 online.5U.S. Citizenship and Immigration Services. Application for Naturalization6Government of Canada. Canadian Citizenship for Adults and Minor Children – Who Can Apply7Immigration, Refugees and Citizenship Canada. Requirements for Becoming a Canadian Citizen Neither country requires you to surrender your existing citizenship as part of the process.8Immigration, Refugees and Citizenship Canada. Will I Lose My Other Citizenship if I Become Canadian
What the U.S. Oath Says vs. What It Means
The U.S. Oath of Allegiance contains striking language about renouncing “all allegiance and fidelity to any foreign prince, potentate, state, or sovereignty.”9U.S. Citizenship and Immigration Services. Chapter 2 – The Oath of Allegiance Read literally, that sounds like it forces you to give up your Canadian citizenship at the naturalization ceremony. In practice, the U.S. government does not enforce it as an actual requirement to renounce, and Canada does not treat taking the U.S. oath as a voluntary renunciation of Canadian citizenship. You keep both. Canada’s own oath of citizenship contains no comparable language about foreign allegiance.
The Tax Catch Most Dual Citizens Miss
This is where dual citizenship gets genuinely complicated. The United States is one of only two countries in the world that taxes its citizens on worldwide income regardless of where they live. Canada taxes based on residency. If you hold both citizenships and live in Canada, you have reporting obligations to both governments — even if you have not set foot in the U.S. in decades, and even if you owe no U.S. tax after credits and exclusions.10Internal Revenue Service. U.S. Citizens and Residents Abroad Filing Requirements11Internal Revenue Service. U.S. Citizens and Resident Aliens Abroad
Two mechanisms keep you from being taxed in full twice. The Foreign Tax Credit gives you a dollar-for-dollar U.S. credit for income tax paid to Canada, claimed on Form 1116.12Internal Revenue Service. Foreign Tax Credit13Internal Revenue Service. Figuring the Foreign Earned Income Exclusion14Internal Revenue Service. Foreign Earned Income Exclusion – Bona Fide Residence Test You can use the exclusion and the Foreign Tax Credit in the same return, but not on the same dollars of income.
The reporting obligation itself is the trap. Missing it can trigger penalties, complicate any future attempt to renounce U.S. citizenship, and interfere with Social Security applications, all separately from whether you actually owed tax.
Foreign Account Reporting
Two additional filings apply on top of the tax return. The FBAR (FinCEN Form 114) is due when the combined value of your foreign financial accounts exceeds $10,000 at any point in the year.15Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR) That threshold is low enough that an ordinary Canadian checking account can trigger it. FATCA reporting on Form 8938 kicks in at higher thresholds: $200,000 at year-end or $300,000 at any time for unmarried filers living abroad, and $400,000 year-end or $600,000 at any time for married couples filing jointly.16Internal Revenue Service. Instructions for Form 8938 The two overlap heavily but are filed separately and carry independent penalties, so many dual citizens have to submit both.
Which Passport at the Border
Dual citizens have to use the right passport for the right country, and this is not a matter of preference. U.S. law makes it illegal for a U.S. citizen to enter or leave the country without a valid U.S. passport, with limited exceptions for certain land and sea crossings.17eCFR. 22 CFR Part 53 – Passport Requirement and Exceptions At an airport, a U.S. citizen needs a U.S. passport to board an international flight to the United States.18U.S. Customs and Border Protection. U.S. Citizens – Documents Needed to Enter the United States and/or to Travel Internationally Canada has the mirror rule: a dual Canadian citizen must present a valid Canadian passport to board any flight to or through Canada.19Government of Canada. Return or Travel to Canada Carry both when you travel between the two countries and use each one at the appropriate border.
Social Security and CPP
The U.S.-Canada Totalization Agreement keeps you from paying into both countries’ social security systems on the same earnings. Live in the U.S. and you pay into U.S. Social Security; live in Canada and you pay into the Canada Pension Plan (or the Quebec Pension Plan in Quebec). To claim the exemption from the other country’s system, you request a certificate of coverage.20Social Security Administration. Totalization Agreement with Canada
The same agreement lets you combine work credits from both countries to qualify for benefits you would not have earned in either alone. In 2026, you earn one U.S. Social Security credit for every $1,890 in covered earnings, up to four credits per year.21Social Security Administration. Social Security Credits and Benefit Eligibility If a split career left you short in one country, credits from the other can fill the gap.
What You Gain
The practical benefits are real. You can live and work in either country without a visa or work permit. You can vote in elections in both, subject to specific residency rules. You hold two passports, which simplifies travel and gives you access to consular assistance from either country when you are somewhere else. You can own property freely in both, access provincial healthcare in Canada where you meet residency rules, and draw Social Security in the U.S. where you have enough work credits. You are also subject to the laws of both countries, including jury duty when you are resident in either.
Giving Up One Citizenship
Some dual citizens eventually renounce, most often on the U.S. side because of the filing burden. To renounce U.S. citizenship you must appear in person at a U.S. embassy or consulate abroad and formally declare your intent to a consular officer. As of April 13, 2026, the administrative fee is $450, down from $2,350.22Federal Register. Schedule of Fees for Consular Services – Fee for Administrative Processing of Request for Certificate of Loss of Nationality of the United States
The bigger cost can be the exit tax under 26 U.S.C. 877A. If you qualify as a “covered expatriate,” the IRS treats your assets as sold the day before renunciation and taxes unrealized gains above an inflation-adjusted exclusion (base amount of $600,000 in 2008 dollars).23Office of the Law Revision Counsel. 26 USC 877A – Tax Responsibilities of Expatriation You are a covered expatriate if your net worth is $2 million or more, if your average annual net income tax for the five preceding years exceeds an inflation-adjusted threshold, or if you cannot certify five years of full tax compliance.
There is an important carve-out for people who were dual citizens from birth. If you became a U.S. citizen at birth and were also a citizen of another country at birth, you continue to be a citizen and tax resident of that other country, and you have not been a U.S. resident for more than 10 of the 15 tax years before renouncing, you are not treated as a covered expatriate. The exit tax does not apply.23Office of the Law Revision Counsel. 26 USC 877A – Tax Responsibilities of Expatriation That exception matters most for people who were born in Canada to an American parent, grew up in Canada, and never really lived in the U.S.
Renouncing Canadian citizenship is simpler. You apply through Immigration, Refugees and Citizenship Canada, no exit tax applies under Canadian law, and the process is administrative rather than a consular ceremony. You must already be a citizen of another country, or about to become one, since Canada will not leave you stateless.