Under the latest changes to Canadian citizenship law, anyone with Canadian ancestry can now automatically qualify for Canadian citizenship—regardless of where they were born or whether their parents or grandparents ever lived in Canada or held Canadian passports.
If you were born before December 15, 2025, and can prove lineage back to a Canadian ancestor, you’re eligible under the new citizenship‑by‑descent rules and can apply for proof of Canadian citizenship. Once that proof is granted, you can then apply for a Canadian passport, giving you the rights and travel benefits of Canadian citizenship.
The rules apply equally to biological and adopted children, and they are especially relevant for Americans across the United States, including the large population in New England where roughly three million people may qualify due to historical Canadian migration between 1870 and 1930.
Obtaining dual citizenship with Canada lets you enjoy the rights of both countries, including the ability to enter, live, and settle in Canada permanently. Dual‑citizen Canadians who also hold a Canadian passport can gain even greater global mobility compared with the US passport alone.
To apply for proof of Canadian citizenship, you’ll need to submit documents tracing your ancestry—such as birth certificates, baptismal records, and proof of your Canadian ancestor’s status. At the time of writing, processing for these applications typically takes about 11 months.
An important benefit: acquiring Canadian citizenship does not automatically create any Canadian income tax obligations. Unlike the United States, which taxes its citizens worldwide, Canada taxes people based on residency, not citizenship. So if you’re an American‑born dual citizen who never relocates to Canada or owns property or businesses there, you generally won’t owe Canadian income tax or need to file a Canadian tax return.
If you choose to settle in Canada permanently as a dual citizen, Canada’s tax treaty with the United States helps prevent double taxation, allowing you to offset some taxes paid to one country against those owed to the other.
Citizenship by descent applies only to people born outside Canada. Children born in Canada or in Canadian airspace are generally automatically Canadian citizens by birth, unless they fall into rare exceptions such as children of foreign diplomats.
The overhaul comes from Bill C‑3, “An Act to Amend the Citizenship Act,” which took effect on December 15, 2025. Before this law, Canadian citizenship by descent was restricted to only one generation born abroad, known as the first‑generation limit (FGL).
That former FGL, introduced in 2009, was declared unconstitutional by the Ontario Superior Court of Justice in December 2023. In response, the government passed Bill C‑3, which retroactively removes the FGL for everyone born before December 15, 2025, and—going forward—creates an exception for children born on or after that date if their Canadian parent meets a “substantial connection to Canada” test: living in Canada for at least three years before the child’s birth or adoption.
