Moving from Montreal to San Antonio: Taxes and the Defence-Cyber Corridor

San Antonio doesn’t look like a typical Montreal-to-Texas destination until you notice what sits at Joint Base San Antonio. Lackland’s 16th Air Force runs the Air Force’s information warfare and cyber mission, and the contractor ecosystem around it, SAIC, Booz Allen Hamilton, and a growing bench of smaller cybersecurity firms, hires directly against the same skill set Montreal has spent a decade building through its AI and security research base. Add USAA’s headquarters, Rackspace’s cloud business, and Valero’s energy operations, and the pull goes well beyond one industry. None of that changes what happens on the way out of Quebec. The combined top rate runs near 53.31%, the steepest in the country, and it applies in full on a departure return before Texas’s zero ever shows up on a paycheck.

Why is San Antonio pulling Montreal cyber talent?

Because the mission at Lackland needs exactly the skill set Montreal has been producing for years. The 16th Air Force runs the Air Force’s information warfare and cyber operations out of JBSA, and the contractor ecosystem that supports it, led by SAIC, Booz Allen Hamilton, and Southwest Research Institute, hires cybersecurity engineers, AI/ML specialists, and cleared analysts at a pace the local labor market alone can’t fill.

• USAA’s roughly 35,000-person headquarters and Rackspace Technology’s cloud and managed-services base add a second, non-defence tech lane into the same metro.
• JBSA itself, combining Lackland, Fort Sam Houston, and Randolph, runs close to 80,000 military, civilian, and contractor personnel, making it one of the largest single employment bases in the corridor.

How much does Quebec’s rate drop in Texas?

By roughly sixteen points at the top bracket, since Texas’s constitution bars a state income tax outright and no Texas city, San Antonio included, can layer one on top. Quebec’s five brackets top out at 25.75% provincially, combined with federal tax to a rate near 53.31%. Texas charges nothing at the state or municipal level, so the entire provincial layer disappears going forward, for salary, bonus, or any defence-contractor equity alike.

	Montreal / Quebec	San Antonio / Texas
Provincial / state income tax	Up to 25.75%	None
City income tax	None	None (barred statewide)
Combined top marginal rate	About 53.31%	About 37% (federal only)
Sales tax	QST 9.975% + GST 5%, about 14.975%	6.25% state + 2% city, about 8.25%
Property tax (effective rate)	Roughly 0.7% to 1.0%, plus a welcome tax on purchase	Roughly 1.8% to 2.4% in Bexar County
Health insurance	RAMQ, ends at month-end of departure	No state program; employer plan or ACA marketplace
RRSP treatment	Separate provincial withholding while resident	Treaty deferral, no state addback once non-resident

Which authorities close the Quebec departure file?

Three Canadian-side authorities, before the IRS ever enters the picture. The CRA takes the final federal T1, covering worldwide income through the departure date. Revenu Québec takes the parallel TP-1, and issues Relevé 1 and Relevé 3 slips in place of the T4 and T5 every other province uses.

• Anyone who has been billing consulting or contract income through a Quebec-incorporated company also carries a Health Services Fund (QHSF) account, the employer-side payroll contribution funding the province’s health system, and that account needs its own wind-down on its own schedule.
• A cybersecurity analyst moving on a straight offer letter from SAIC or Booz Allen usually only closes the first two; anyone who ran side consulting through a QC corporation needs all three shut before the file is done.
• The federal mechanics, including Form T1161 and T1243, apply the same way regardless of destination; the full sequence sits in the leaving-Canada checklist.

What happens to the RRSP and TFSA before you leave?

The RRSP carries forward cleanly under the treaty; the TFSA does not. Quebec is the one province where an RRSP withdrawal while still resident carries two separate withholding lines, a lower federal rate plus a Quebec provincial layer, since Quebec collects its own tax instead of letting the CRA remit a combined amount. Once residency ends, a withdrawal becomes a non-resident withdrawal taxed only under the treaty’s 25% lump-sum or 15% periodic rate, with no state addback competing for the credit in Texas.

• The TFSA has no US equivalent and no treaty protection; the IRS treats it as a foreign trust with its own reporting burden, so the standard move is closing it out before departure rather than carrying it across the border.

Why does the QST drop matter so much here?

Because it’s one of the largest single-line drops in this whole corridor set, and it applies to every purchase from day one of Texas residency. QST runs 9.975%, stacked with 5% GST to about 14.975% combined. San Antonio’s rate lands at 8.25%, the 6.25% state rate plus a 2% city add-on, a drop of roughly six and a half points on everyday spending before the income tax side is even counted.

• A Quebec-incorporated business still registered for QST needs a formal deregistration with Revenu Québec, filed separately from the personal TP-1 and any QHSF closeout.

What happens to RAMQ coverage after the move?

It ends on a fixed date rather than trailing off. RAMQ coverage generally runs through the end of the month in which you depart, not a rolling reciprocal period, so the gap to fill on the US side is shorter and sharper than movers sometimes expect. Texas has no state health program to replace it; the move qualifies as a Special Enrollment Period event on the federal marketplace, giving 60 days from the move date to enroll in an employer plan or healthcare.gov coverage.

• Defence contractors typically start benefits on day one or after a short waiting period; confirm the exact start date before relying on it to bridge the RAMQ cutoff.

How does Bexar County property tax compare?

Higher on an ongoing basis, with no Quebec-style transfer tax at closing. Bexar County, plus whichever school district and city levy applies, typically brings the effective combined property tax rate to somewhere between 1.8% and 2.4% of assessed value, well above the roughly 0.7% to 1.0% common across Quebec municipalities.

• There is no equivalent to Quebec’s welcome tax on the buy side; the closing cost that replaces it is a small documentary recording fee, and a Texas homestead exemption can reduce the ongoing bill on a primary residence once a Texas ID and proof of occupancy are in place.

Where do defence-corridor movers settle in San Antonio?

Mostly around JBSA’s three installations and each person’s household stage, not around a single tech-hub neighborhood. Contractors working near Lackland tend to land in Alamo Heights, Stone Oak, or the near North Side for the commute; those tied to Fort Sam Houston or Randolph often prefer the Northeast Side or Converse. Families weigh school districts alongside commute time, and San Antonio’s home prices stay noticeably lower than Austin or Dallas for a comparable house.

• None of it changes the tax analysis; the property tax rate runs with the taxing jurisdiction, not the neighborhood’s reputation.

What should I do next?

Pin the departure date first, since it fixes the deemed-disposition rate and the RAMQ end-of-month cutoff. Close the TFSA before that date, pull a full year of RRSP statements, and if any consulting income runs through a Quebec corporation, get its QST and QHSF accounts ready to close alongside the personal TP-1 and T1. Then line up the Texas side: a part-year federal return, US health coverage inside the 60-day marketplace window, and a homestead application once the new home is bought.

• Moving from Canada to Texas, the national version of this corridor
• Moving from Quebec to Texas, the province-level version
• Moving from Montreal to Austin, the AI and gaming corridor into Texas
• Moving from Montreal to Houston, the aerospace and energy corridor into Texas
• Moving from Montreal to Dallas, the AI and aerospace corridor into Texas
• Canada’s departure tax, T1161 and T1243
• Leaving Canada permanently: the checklist
• RRSP and TFSA after moving to the US
• The US-Canada tax treaty explained
• Your first US tax return as a Canadian immigrant
• Provincial health insurance when leaving Canada
• State income tax for cross-border filers
• Toronto to San Antonio, the USAA and military-tech corridor
• Vancouver to San Antonio, the real estate arbitrage corridor from BC
• Calgary to San Antonio, the energy corridor from Alberta
• Ottawa to San Antonio, the JBSA defence corridor

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