Yes, you can keep both. American dual citizenship with Canada is legal in both countries, and the US State Department says a US citizen can become a citizen of another country without losing US citizenship. Canada does not make you give up another nationality either, so a descent claim does not put your US passport at risk.
This guide uses what Immigration, Refugees and Citizenship Canada (IRCC) published in 2026, plus State Department, Elections Canada and Canada Revenue Agency guidance. It is for Americans whose parent or grandparent was Canadian.
Will claiming Canadian citizenship make you lose US citizenship?
No. The State Department says a US citizen can become a citizen of another country without losing US citizenship, and a descent claim is not even a naturalization. You are only asking Canada to confirm a status the law already gives you, so your US passport, Social Security number and US vote stay where they are.
Losing US citizenship takes a voluntary act done with the intent to give it up, such as formally renouncing at a US embassy. A Canadian proof of citizenship application is not that.
Am I a Canadian citizen by descent?
Trace your family line one generation at a time. Each link is tested against the law in force when that person was born, so you see exactly where your chain holds and where it breaks. About three minutes, and no account needed.
Check my family lineIs American dual citizenship with Canada recognised by both governments?
Yes. IRCC says Canadians may hold another country’s citizenship while keeping Canadian citizenship, and the State Department says the same from the US side. Each country simply treats you as its own citizen while you deal with it, and that has a few practical effects.
The State Department notes that dual nationals owe allegiance to both countries and must follow the laws of both. Canada will not treat you as an American visitor. The United States will not treat you as a Canadian one.
Which passport do you use at the border?
Use your US passport to leave and enter the United States, because the State Department says every US dual national must.
Going into Canada, IRCC gives Americans an exception: Canadian and US dual citizens can fly in with a valid Canadian or US passport, while every other dual citizen needs a Canadian passport. If you travel on your US passport only, IRCC advises carrying proof of your Canadian citizenship, and an officer may screen you. IRCC recommends carrying both passports.
That exception helps while your Canadian passport is still being processed. As a US citizen with a valid US passport, you also do not need an electronic travel authorization (eTA), which is the online entry approval many other visitors need.
We cover the passport and SIN steps in our guide to what your citizenship certificate does and does not give you.
Can you vote in Canada as an American dual citizen?
Only if you have lived in Canada at some point. Canadians abroad can vote by special ballot through the International Register of Electors, but you must be 18 or older and have lived in Canada at some point in your life. Many people who claim by descent have never lived there, so they cannot vote yet.
That changes if you move. Once you live in Canada, you register to vote like any other citizen.
Does American dual citizenship with Canada mean Canadian taxes?
Not on its own. The Canada Revenue Agency decides tax residency by your residential ties to Canada. A home, a spouse or common-law partner, or dependants there are significant ties. A Canadian passport is only a secondary tie, so a certificate alone does not make you a Canadian tax resident.
The US side works differently. The IRS says US citizens abroad are taxed on worldwide income, wherever they live, and becoming Canadian does not change that.
If you plan to move north, speak to a cross-border accountant before you go. We do not give tax advice, and your own accounts, pensions and filing dates matter here.
What actually changes once you are a dual citizen?
What Changes in Canada:
- Mobility Rights: You can live, work, and study in Canada without needing permits or facing time limits.
- Travel Documents: You are eligible to apply for a Canadian passport.
- Future Benefits: Upon establishing residency in Canada, you become eligible for provincial health coverage and a Social Insurance Number (SIN), subject to each program’s specific requirements.
What Remains the Same in the US:
Documentation: You continue to renew and use your US passport.
Tax Obligations: You must continue to file US taxes based on worldwide income.
Civic Duties: You retain the right to vote in US elections.
What should you check before you apply?
Check that you are actually a citizen first. Following amendments to the Citizenship Act, IRCC put Bill C-3 into effect on 15 December 2025 , and many people born abroad before that date are now Canadian and can apply for proof. It depends on when each person in your line was born, so trace your family line before you order records.
Start with our citizenship by descent guide, then work through the eligibility checklist for Americans. If you worry the law could be undone, our note on Bill C-3 reversal risk explains what would and would not change.
Frequently asked questions about American dual citizenship with Canada
These are short answers to the questions Americans ask us most once they learn they may already be Canadian. Each one rests on the IRCC, State Department and Elections Canada guidance named above. If your family line has a gap, a name change or an adoption in it, the general answer may not fit you.
Do I need a Canadian passport to fly to Canada?
No. IRCC says American Canadians can travel to Canada with a valid Canadian or US passport, so you can fly in on your US passport while a Canadian one is still in process. You still need your US passport to leave and come back into the United States.
Can I lose my Canadian citizenship by living in the US?
No. Canada does not take citizenship away from people because they live abroad. The old rule that made some people born abroad apply by age 28 to keep their citizenship was repealed on April 17, 2009. Bill C-3 gave citizenship back to many who lost it under that rule.
Will my children get dual citizenship too?
It depends on when they were born. If you were born or adopted outside Canada, IRCC says your child born or adopted abroad on or after 15 December 2025 is Canadian only if you spent at least 1,095 days (3 years) in Canada before the birth or adoption. Children born earlier may already be Canadian.
The law here is simple and the paperwork is not. If you want a straight answer on your own family line before you spend money on records, speak with Amir Ismail, RCIC #R412319, and Book Your Strategy Consultation.
