Dual citizens in Canada: what filing in two countries actually involves

Two returns, every year — that part never changes

Canada taxes you because you live here; the United States taxes you because you are a citizen. Hold both, and you file both: a T1 with the CRA by April 30, and a Form 1040 with the IRS — due June 15 for Americans abroad, with an extension to October 15 available. This applies even if you were born in Canada, have never worked a day in the US, and hold citizenship only through a parent. There is no income level below which the US side quietly disappears, and no number of years in Canada that ends it.

The treaty erases most tax — not the filing

The good news is genuine: because Canadian tax rates are generally higher than US rates, foreign tax credits usually reduce the US bill to zero. Salary, self-employment income, interest, most investment income — the Canadian tax you already paid becomes a credit on the 1040, and the foreign earned income exclusion offers a second route for wages. Most dual citizens we prepare owe the IRS nothing.

What the treaty does not do is switch off the obligation itself. Its "savings clause" lets the US tax its own citizens largely as if the treaty didn't exist, so the residency tie-breakers that rescue other cross-border taxpayers don't remove a citizen's filing duty. The real cost of dual citizenship is rarely tax — it is paperwork, and the penalty exposure for skipping it.

The accounts that cause the trouble

• TFSA: tax-free in Canada, taxable in the US. The treaty protects RRSPs, not TFSAs, so the growth is reported as income on the 1040 — often making a TFSA pointless or worse for a dual citizen.
• Canadian mutual funds and ETFs: the US treats them as PFICs (passive foreign investment companies), a punitive regime with its own form — 8621 — per fund, per year. US-listed ETFs held in the same account avoid the problem entirely.
• RESPs: not recognized by the US; growth is taxable there and extra information reporting can apply.
• Your home: Canada exempts a principal residence; the US only excludes a capped amount of gain (confirm the current figure). A long-held Canadian house can produce a real US tax bill in the year you sell.

An RRSP, by contrast, is treaty-protected and works well — it is usually the dual citizen's best savings vehicle.

The information returns behind the returns

Alongside the 1040 sits a stack of disclosures: the FBAR when non-US accounts exceed US$10,000 combined, Form 8938 at higher thresholds, and Form 5471 if you own a Canadian corporation. None of these calculate tax; all of them carry per-form penalties for silence. Our FBAR guide covers the biggest one. If you run a business through a Canadian corporation, say so early — the US rules for corporate owners reshape how the company should pay you.

Years behind? There is a clean way back

Most dual citizens who come to us are not evading anything — they simply never knew. The IRS built the streamlined program for exactly this: three years of returns, six years of FBARs, a non-willfulness certification, and, for people living outside the US, no penalty. We cover it fully in our streamlined filing guide. Coming forward before the IRS writes first is the whole game.

Renunciation, honestly

Some clients ask whether to give up US citizenship, and it deserves a straight answer: it is a real option and, for someone with no US future, sometimes a sensible one. But it is not a shortcut. You must generally certify five years of tax compliance and file Form 8854 on the way out; a State Department fee applies (confirm the current amount); and higher-net-worth expatriates can face an exit tax on unrealized gains. Renouncing does not erase past filing gaps — clean up first, then decide with full information. We handle the tax side of both steps.

Source: IRS — US citizens and resident aliens abroad.