Moving from Toronto to Seattle: Taxes, Fintech, and the No-Income-Tax Pull

Toronto sends a steady stream of engineers and data scientists into the Puget Sound tech scene, Shopify alumni, RBC and TD’s technology divisions, and the city’s fintech startup cluster all feeding into Amazon, Microsoft, Boeing, T-Mobile, Expedia, Zillow, and Redfin. Ontario’s combined top rate runs near 53.53%. Washington charges no state income tax at all, just the federal rate on top, roughly 37% at the highest bracket. That’s the largest single-line rate drop in this entire content set. This is the city-level companion to the broader Ontario-to-Washington guide, with the numbers specific to this exact move.

How different are the two tax systems?

The income tax gap is real and it’s the headline, but Washington runs its own quieter tax structure underneath the zero. Between the capital gains excise, sales tax, and a state estate tax with a low threshold, the comparison needs the full table, not just the top line.

Tax	Toronto / Ontario	Seattle / Washington
Personal income tax	Combined federal + Ontario top rate ~53.53%	None, federal only (~37% top)
Capital gains	50% inclusion, taxed at ordinary rates	7% excise above $270,000/year on long-term gains
Sales tax	13% HST	About 10.25% combined state and local in Seattle
Property tax	Roughly 0.6% to 1%, plus Toronto’s land transfer tax	About 1.0% in King County
Estate tax	None (deemed disposition at death instead)	Graduated 10% to 20% above a $2.193 million threshold
Health premium	Ontario Health Premium, up to $900/year	None

What happens to my Ontario tax bill on the way out?

Leaving Ontario triggers the standard departure tax: a deemed disposition of your worldwide property at fair market value on your departure date, reported on the final T1. Because the residency test keys off your last day in Ontario, the whole departure-year gain typically lands at Ontario’s rates, surtax included once the basic tax on it clears the threshold. That final return is entirely a Canadian-side event; Washington has no matching credit or offset for it on the other side.

Is this a tech corridor or a fintech corridor?

Both, and increasingly the same thing. The obvious flow is Shopify engineers, RBC and TD’s technology arms, and Toronto’s AI research talent landing directly at Amazon Web Services and Microsoft Azure, the two Puget Sound employers doing the most cloud-infrastructure hiring anywhere in North America.

• The newer piece is the bank-tech to fintech overlap: people who spent years building payment rails or trading systems inside a Canadian bank’s tech division now show up at Expedia, Zillow, and Redfin building consumer-facing products, a crossover that barely existed a decade ago and now runs steadily in both directions.

How does Washington’s capital gains excise tax work?

It reaches only long-term capital gains, assets held over a year, above $270,000 in a single tax year, not ordinary income, and not real estate or retirement account gains, both of which are carved out entirely. The Washington Supreme Court upheld it in March 2023 on that basis. For someone selling a concentrated Amazon or Microsoft stock position, or liquidating a non-registered Canadian brokerage account after arrival, that threshold is easy to clear in one strong year and easy to stay under with a plan.

• Short-term gains, held under a year, aren’t reached by this tax at all.
• A W-2 paycheck at either company owes zero Washington state tax; the excise only shows up on the sale, not the vest.

What happens to RSUs and stock at Amazon and Microsoft?

A vest itself is ordinary wage income the moment shares land in your account, taxed federally with no state layer and no excise exposure. The excise only applies if you hold vested shares past that point and they appreciate before you sell, which is common at both companies given multi-year vesting and Amazon’s well-known culture of holding concentrated positions.

• A grant that started vesting while you were still in Toronto carries cross-border sourcing on top of that: the portion vesting after you become a US resident gets allocated between Canadian and US tax based on days worked in each country during the vesting period, so a straddling grant needs that split done deliberately.

Why does sales tax barely change but property tax does?

Ontario’s 13% HST and Seattle’s roughly 10.25% combined rate land close enough that sales tax isn’t a real factor in this corridor, unlike the Alberta and BC routes where it swings hard in one direction. Property tax moves a little, not a lot: Toronto runs roughly 0.6% to 1% of assessed value plus a land transfer tax due at purchase, while King County runs closer to 1.0%, without the transfer-tax hit on the way in. Neither number should move the decision on its own; both belong in the household budget regardless.

What happens to my RRSP, TFSA, and OHIP?

Washington has no state income tax return, so there’s no state-level addback on RRSP growth the way California imposes one. The federal treaty deferral already keeps that growth off the 1040, and with no state return to reconcile it against, that’s the entire state-side story. The TFSA is still a foreign trust for US purposes federally, so the standard recommendation to collapse it before departure applies here as everywhere.

• OHIP continues for up to three months after you stop being an Ontario resident, and that gap needs a US-side plan lined up before it lapses, which Amazon and Microsoft both offer from day one.

What about Washington’s estate tax threshold?

Ontario has no estate tax; it relies on the deemed-disposition rule at death instead, taxing accrued gains on the final return rather than the estate itself. Washington does have its own estate tax, graduated from 10% to 20% on estates above a $2.193 million threshold, far below the federal exemption of $13.61 million. A Canadian who becomes a Washington domiciliary with a combined estate above that state line is planning around three separate layers: the Canadian deemed disposition at death, US federal estate tax if the federal exemption is exceeded, and Washington’s own tax on top of both.

Where do Toronto tech movers actually land?

Capitol Hill and the Central District pull the younger, single crowd who want walkability and nightlife close to Amazon’s South Lake Union offices. Bellevue and Kirkland are the default for families and anyone on a Microsoft-East assignment, close to the Redmond campus with strong school districts; Redmond itself suits people who want to live where they work. Queen Anne, Fremont, and Ballard offer a quieter, more residential feel without leaving city limits.

• Mercer Island and Sammamish/Issaquah sit at the higher end, larger lots and higher price points, popular with senior engineers and anyone coming off a strong Toronto home sale with cash to deploy.

What should I do before the move?

Get the Ontario departure return scoped before you leave, so any brokerage gains and unvested equity are handled deliberately instead of discovered at filing time. If a grant straddles your move date, get the cross-border vesting allocation done before the first post-move vest, not after. Line up US health coverage for the OHIP gap, and if RSUs are likely to produce a large single-year gain in your first couple of years, map the sale timing against the $270,000 excise threshold before the shares are even sitting in your account.

• Ontario to Washington state taxes, the province-level version of this corridor
• Canada to Washington, the province-agnostic parent guide
• Calgary to Seattle, the same destination from Alberta
• Vancouver to Seattle, the same destination from BC
• Toronto to San Francisco, the RRSP-addback comparison corridor
• Toronto to Los Angeles, the entertainment-industry version of a California move
• Toronto to New York, the other state-plus-city coastal corridor
• Toronto to Austin, the no-state-tax Texas comparison
• Toronto to Denver, the outdoor-tech corridor
• Canadian departure tax basics, the T1161/T1243 filing mechanics
• Leaving Canada permanently: tax checklist, the full departure sequence
• RRSP and TFSA on a TN move, what to do with Canadian accounts before you go
• The US-Canada tax treaty explained, the framework behind the deferral and sourcing rules above
• Your first US tax return, what filing looks like in year one
• Provincial health insurance timing, the OHIP coverage tail
• State income tax for cross-border filers, the general state-by-state picture
• Alberta to Washington state taxes, the energy-to-tech version of this same destination
• Toronto to Philadelphia, the pharma and finance corridor
• Toronto to Detroit, the auto and EV corridor into Michigan
• Toronto to Minneapolis, the med-tech and corporate HQ corridor

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