Moving from Ottawa to Seattle: Taxes, Cloud Security, and the Defence-to-Tech Pipeline

Ottawa’s move to Seattle doesn’t run through Bay Street finance the way Toronto’s does. It runs through cyber and IT staff leaving DND and the Canadian Armed Forces for security roles at Amazon Web Services and Microsoft, Shopify’s Ottawa engineering base feeding the broader tech scene, and a smaller thread of defence-policy people landing at Boeing and the Seattle-area contractor corridor. The rate drop is real and large. The planning that actually matters sits in the capital gains excise, the departure-year return, and what happens to a TFSA once it crosses the border.

How different are the two tax systems?

The headline is the income tax disappearing entirely. That’s accurate, but the full comparison needs the capital gains excise, the sales tax, and the property tax sitting next to it before the picture is complete.

Tax	Ottawa / Ontario	Seattle / Washington
Personal income tax	Combined federal + Ontario top rate ~53.53%	None
Capital gains	Included in income at 50%/66.67% inclusion	7% excise above $270,000/year on long-term gains
Sales tax	HST 13%	~10.25% combined state and local
Property tax	Roughly 1.0% to 1.2% of assessed value	King County averages close to 1%
City income tax	None	None
Estate tax	Ontario Estate Administration Tax, roughly 1.5% above the first tier	Washington estate tax above $2.193 million

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

Leaving triggers the same deemed disposition every Ontario departure runs into regardless of destination. Canada treats most worldwide property as sold at fair market value the day residency ends, and the resulting gain lands on the final Ontario return at the full surtax-augmented rate. Ontario’s top provincial bracket of 13.16% gets a 20% surtax on basic Ontario tax above roughly $4,991, then a further 36% above roughly $6,387, which is how the combined figure reaches 53.53%.

• The departure tax mechanics and the full exit checklist cover the T1161, the T1243, and the elections available to manage the timing of that bill.

Why does the government-to-tech pipeline matter here?

Because it produces a specific, recurring fact pattern: a federal employee with a security clearance, a defined-benefit pension entitlement, and often a modest but real brokerage or RRSP position, moving into a private-sector comp structure for the first time. DND and CAF cyber and IT staff are the largest single group, landing in security and cloud-infrastructure roles at Amazon Web Services (frequently AWS GovCloud, given the clearance background) and Microsoft’s government cloud division. Shopify’s Ottawa engineering roots feed a second, smaller stream into the broader Seattle tech scene.

• A third group carries defence-policy experience into Boeing and the wider Seattle-area defence-contractor corridor, where a federal pension buyout or commutation decision often lands in the same tax year as the departure return.

What happens to OHIP after I leave Ottawa?

It doesn’t end the day you land in Seattle. OHIP coverage typically runs about three more months past the date Ontario residency ends, and the Ontario Health Premium built into the Ontario tax bill stops accruing the year after departure rather than immediately. A move from Canada also qualifies as a Special Enrollment Period event on the US federal marketplace, giving 60 days to enroll in an employer plan or healthcare.gov coverage before that OHIP tail closes. The provincial health insurance guide walks through the full wind-down.

How does the capital gains excise actually work?

It taxes the gain realized on sale, not the value at vesting or grant, and only above the $270,000 annual threshold for a single filer. Sell-to-cover at RSU vest generally stays under it. The exposure shows up when someone holds shares past vesting, watches them appreciate, and then sells a large block in one year, which is a common pattern for tech and clearance-driven hires who get equity as part of the offer. Spreading a large sale across two calendar years, when the timeline allows it, keeps each year further from the threshold.

What happens to RRSPs and TFSAs in Washington?

The RRSP carries forward cleanly. The treaty defers US federal tax on RRSP growth automatically, and Washington has no state income tax return to layer an addback onto in the first place, unlike California. The TFSA gets none of that protection: its income is taxed federally as ordinary investment income from day one, with reporting exposure under forms like 3520 and 3520-A, and possible PFIC treatment if it holds Canadian mutual funds. The RRSP and TFSA guide covers closing a TFSA before departure, usually the simpler path.

What about sales tax and property tax?

Sales tax moves against the direction most people expect. Seattle’s combined rate runs close to 10.25%, below Ontario’s flat 13% HST, but it applies to a narrower base in some categories, so the practical gap on everyday spending is smaller than the headline numbers suggest. Property tax lands close to even: King County averages near 1% of assessed value, in the same range as Ottawa’s roughly 1.0% to 1.2%, though Washington’s lack of a homestead-style cap means a fast-appreciating property can see its bill climb faster year over year than an equivalent Ottawa home would.

What about the Washington estate tax?

It applies at a threshold well below the federal exemption, and it’s a state-level layer most Ontario arrivals haven’t planned around before. Washington taxes estates above $2.193 million, separate from federal estate tax exposure that already applies to non-resident and resident aliens under different rules. A Seattle-area home purchase combined with a growing 401(k) or brokerage account can approach that threshold well before the federal number becomes the binding constraint, which makes it worth a real conversation rather than an assumption that only the federal exemption matters.

Where do Ottawa arrivals usually land in Seattle?

It splits by pipeline. AWS and Microsoft hires cluster in Bellevue and Redmond, both a short commute to campus and close to a growing cluster of other government-cloud staff who made the same move. The Boeing and defence-contractor group tends toward Renton and the Kent Valley instead, nearer the plants than downtown. None of it changes the state-level tax analysis above, though property tax rates and school district levies do vary by city within King County.

What should I do before the move?

Get the Ontario departure return scoped before you leave, especially if a pension commutation decision falls in the same tax year, so the two don’t compound unexpectedly. Decide on the TFSA before departure rather than after. And if equity compensation is part of the offer, map the vest and likely sale timing against the $270,000 excise threshold before the first shares land, not after a large block has already appreciated.

• Ottawa to New York, the sibling government corridor with a near-lateral rate
• Ottawa to Washington DC, the federal-to-federal policy corridor
• Ottawa to Boston, the government-to-research corridor into Massachusetts
• Ottawa to Chicago, the defence and consulting corridor into Illinois
• Vancouver to Seattle, the tech-heavy sibling corridor from BC
• Toronto to Seattle, the finance-to-tech sibling corridor
• Calgary to Seattle, the energy-to-tech sibling corridor
• Montreal to Seattle, the three-authority departure from Quebec
• Canada to Washington, the province-agnostic version of this destination
• Canada’s departure tax, T1161 and T1243
• Leaving Canada permanently, the full checklist
• RRSPs and TFSAs on a move 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
• State income tax on a cross-border move
• Ottawa to Miami, the government retirement corridor into Florida
• Ottawa to Austin, the government-to-tech corridor into Texas
• Ottawa to Denver, the defence-to-aerospace corridor into Colorado
• Ottawa to Houston, the government-to-energy corridor into Texas
• Ottawa to Los Angeles, the aerospace corridor into California
• Ottawa to San Francisco, the government-to-tech corridor into California
• Ottawa to Portland, the government-to-clean-energy corridor into Oregon

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