Moving from Montreal to Miami: Taxes, Three Authorities, and the Biggest Drop

Montreal to Miami is the corridor with the biggest single number attached to it: no province-to-state pairing drops further than Quebec’s combined top rate to Florida’s zero. It is also the only city corridor where the departure year runs through three separate tax authorities before Florida enters the picture at all, because Quebec is the one province that runs its own income tax agency, its own return, and its own clock. The rate drop is real. Getting there cleanly means closing out with Revenu Quebec and the CRA separately, not just once.

What actually changes when you leave Montreal for Miami?

Two things, on two different calendars. Going forward, Quebec and federal Canadian income tax stop applying once residency has genuinely ended, and Florida has no state income tax to replace it with. On the way out, Canada deems a sale of most of what you own at fair market value on your departure date, and Quebec assesses that gain at its own top bracket, separately from the federal side.

The ongoing savings are the number people focus on. The one-time exit bill, taxed at the country’s highest provincial rate, is the one that gets underestimated. The federal mechanics of that exit are in Form T1161 and T1243 and the full sequence is in the leaving-Canada checklist.

Why does Montreal drop further than Toronto?

Because Quebec’s top bracket is steeper going in, which makes the fall further coming out. Quebec’s provincial top rate is 25.75%, combined with federal tax to roughly 53.31%. Ontario’s combined top rate sits closer to 53.5%, technically a hair higher, but Ontario’s departure tax is computed without a second provincial return and a second set of slips sitting on top of the federal one. Quebec adds Revenu Quebec to every step: a separate TP-1, a separate notice of assessment, and a departure-year abatement calculation that Ontario filers never see at all.

	Montreal / Quebec	Miami / Florida
Income tax authorities on departure	CRA and Revenu Quebec, two returns	None, Florida has no state income tax
Combined top marginal rate	~53.31%	0% state, federal only
Sales tax	QST 9.975% plus GST 5%, ~14.975% combined	~7% in Miami-Dade (6% state plus 1% surtax)
Property transfer tax	Droits de mutation (“welcome tax”) on purchase	Documentary stamp tax on deeds at closing
Property tax	Municipal tax roll, no statutory cap	Ad valorem tax with homestead exemption and 3% Save Our Homes cap
Estate tax	No Quebec estate tax; federal deemed disposition on death	No Florida estate tax; US federal estate tax applies above the non-resident exemption

Do you file with Revenu Quebec as well as the CRA?

Yes, and this has no equivalent in a Toronto or Vancouver file. Every other province has its income tax calculated entirely on the federal T1. Quebec is the exception: it issues its own slips, Releve 1 for employment and Releve 3 for investment income, in place of T4 and T5, and requires a final TP-1 to your departure date. The CRA and Revenu Quebec assess independently, so a clean federal notice of assessment does not close the provincial file, and the Quebec abatement (a 16.5% cut to federal tax) is prorated to the part of the year you were still a Quebec resident.

What happens to QST once you’re in Florida?

It stops applying to you the day Quebec residency ends, and nothing replaces it at the same rate. QST runs 9.975%, stacked with 5% GST to a combined rate near 14.975%, one of the higher consumption tax burdens in North America. Miami-Dade’s sales tax runs about 7%, the 6% Florida state rate plus a 1% county surtax, so this corridor carries the largest sales-tax drop of any pairing in this series, roughly seven points, on top of the income tax drop. A business still registered for QST needs its own deregistration with Revenu Quebec, separate from the personal departure filings.

Have your winters in Hallandale already started the clock?

For a lot of Montreal families, this is not a fresh decision, it is a pattern that has quietly become the real answer already. Hallandale Beach, Hollywood, and Sunny Isles have carried francophone Quebec communities for decades, long enough that French-language services, from real estate agents to medical clinics, are a normal part of the landscape rather than a novelty.

Years of long winters in these towns push directly against the substantial presence test, and Quebec snowbirds have historically pushed those winters longer than most other provinces’ retirees, which makes the day count worth checking before anyone assumes the “official” move is what starts the US tax story.

Is the presence test the same trap Toronto snowbirds face?

Same formula, often a longer track record behind it. The test counts the current year’s US days in full, one-third of the prior year’s days, and one-sixth of the days from two years before, and 183 weighted days makes you a US resident alien for tax purposes regardless of intent or ownership.

Montreal’s snowbird pipeline to South Florida is one of the oldest and largest from any Canadian city, which means more files where the weighted count is already close to the line by the time anyone calls to plan a permanent move. Form 8840, the closer-connection exception, can preserve non-resident status for a year that’s still open, but it has to be filed on time and it has a hard day-count ceiling of its own.

What happens to RAMQ and the Quebec abatement?

Both wind down, on different clocks. RAMQ, Quebec’s health insurance board, runs its own residency rules, distinct from Ontario’s OHIP, and typically carries a reciprocal-coverage tail of roughly three months after Revenu Quebec is notified of departure, after which Florida or private coverage has to be in place. The Quebec abatement is a federal-tax mechanic, not a health one: once there is no Quebec return left to file, it simply stops applying to your federal calculation going forward.

What replaces the welcome tax on a Florida purchase?

A one-time closing cost far lower than what a Montreal buyer pays going in. Quebec’s droits de mutation, the “welcome tax” on most property purchases, disappears once you are buying in Florida instead of Quebec. In its place, a Florida purchase carries a documentary stamp tax on the deed at closing, a smaller one-time cost on the sale price rather than Quebec’s tiered formula. The property tax picture shifts too: Florida’s ad valorem tax has a homestead exemption (Form DR-501, due March 1) and a 3% Save Our Homes cap starting in year two, protections a Montreal tax roll has no equivalent of.

What should you do before you set a departure date?

Pin the date first, since it decides which tax year the deemed disposition lands in for both the CRA and Revenu Quebec. Then pull the actual day count for the last three winters in Florida and run the presence test on real numbers, not a guess based on Quebec’s own residency threshold. Confirm which slips are coming from Quebec payers (Releve, not T4 or T5), and line up the first US filing using the new-immigrant filing guide. Only then does the Florida side, homestead timing and the choice of town, become the easier decision it looks like.

• Moving from Quebec to Florida, the province-level version of this same corridor
• Moving from Canada to Florida, the generic corridor from any province
• Moving from Quebec to the US, the general Quebec departure, Florida-specific pieces stripped out
• Moving from Quebec to Texas, another no-income-tax destination with the same three-authority exit
• Moving from Toronto to Miami, the sibling city corridor from Ontario
• Moving from Montreal to New York, the sibling city corridor where the rate gap is much smaller
• Moving from Montreal to Boston, the biotech and academic corridor
• The Canadian departure tax, T1161 and T1243
• The leaving-Canada permanent checklist
• RRSPs and TFSAs when moving to the US
• The US-Canada tax treaty explained
• Your first US tax return as a new Canadian immigrant
• Provincial health insurance when leaving Canada
• Bought a Florida condo as a snowbird
• The US estate tax and the $60,000 exemption
• Cross-border tax help in Florida
• Montreal to Chicago, the flat-tax Midwest corridor from Quebec
• Montreal to Los Angeles, the VFX and entertainment corridor

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.