Moving from Ontario to Michigan: State Tax, Auto Corridor, and Cross-Border Planning

Michigan charges a flat 4.25% state income tax on all taxable income. It’s the most geographically natural US destination for people in southwestern Ontario, where Detroit and Windsor share a border crossing and the auto industry operates on both sides. The corridor produces a specific set of cross-border scenarios: commuters, corporate transfers, retirees pulling pensions from both countries, and business owners with operations in both jurisdictions. The federal cross-border obligations are the same as any province-to-state move, and other guides cover those. This page covers what makes the Michigan layer different.

How does Michigan’s tax compare to Ontario?

Michigan’s flat 4.25% is significantly lower than Ontario’s progressive provincial rates.

Jurisdiction	Top rate	Lowest bracket rate
Ontario	~20.5% (with surtax)	5.05%
Michigan	4.25% flat	4.25% (same)
Detroit city tax (resident)	2.4%	Added on top of state
Detroit city tax (non-resident)	1.2%	Applies to Detroit-source income

On $150,000 of employment income, Michigan’s state tax is approximately $6,375. Ontario’s provincial tax on the same income would be roughly $10,000 to $12,000 CAD. Even adding the Detroit city tax (if applicable), the combined Michigan rate is lower than Ontario’s provincial layer alone.

Does Michigan have a city income tax?

Yes, and this is the Michigan-specific wrinkle that other flat-tax states don’t have. Twenty-four Michigan cities impose their own income tax, with Detroit being the most significant:

City	Resident rate	Non-resident rate
Detroit	2.4%	1.2%
Grand Rapids	1.5%	0.75%
Flint	1.0%	0.5%
Lansing	1.0%	0.5%
All other cities with income tax	1.0%	0.5%

If you live in Detroit, you pay the 2.4% on all income, on top of the state’s 4.25%, for a combined state+city rate of 6.65%. If you live outside Detroit but work in Detroit, you pay the 1.2% non-resident rate on your Detroit-source wages. If you live and work in a suburb like Troy, Ann Arbor, or Dearborn (none of which have city income taxes), you pay only the 4.25% state rate.

For a Canadian commuter crossing the border daily, the city tax adds a layer: if the workplace is in Detroit, the non-resident city tax applies to the wages earned there, even if the commuter lives in Windsor.

How does Michigan treat the RRSP?

Michigan starts from federal adjusted gross income. The RRSP treaty deferral under Article XVIII keeps the plan’s growth out of federal AGI, so Michigan doesn’t tax it during the deferral period.

When you take RRSP withdrawals, the distribution is included in federal AGI and flows through to Michigan taxable income. However, Michigan’s pension and retirement income exemption may reduce or eliminate the state tax on the withdrawal, depending on your age and birth year:

• Born before 1946: pension and retirement income (including IRA/401(k) distributions) is exempt up to $61,518 (single) / $123,036 (joint) for 2025. RRSP withdrawals reported as pension income on the federal return should qualify for this exemption.
• Born 1946-1952: smaller exemptions apply, and they were phased in over time. The amounts are lower, and some income types that qualify federally don’t qualify for the Michigan exemption.
• Born 1953 or later: the standard exemption is $20,000 (single) / $40,000 (joint) against all income, not just retirement income, and it phases in at age 67.

This matters for Canadian retirees drawing RRSP/RRIF income in Michigan. At the older end, the exemption can eliminate most or all of the Michigan tax on retirement distributions. At the younger end, the full 4.25% applies.

What about the Windsor-Detroit corridor?

The Windsor-Detroit corridor creates the densest cross-border commuter zone in Canada-US relations. Common patterns:

Ontario resident commuting to Detroit. If you live in Windsor and work in Detroit, you’re a Canadian commuter taxed on US-source employment income. You file a 1040-NR (or 1040 if you’re a US citizen/green card holder), a Michigan non-resident return, and a Detroit non-resident city return. The Michigan tax is 4.25% and the Detroit non-resident tax is 1.2%, for a combined 5.45% on the Detroit-source wages. The Canadian return includes the worldwide income with an FTC for the US tax paid.

Moving from Windsor to metro Detroit. This converts you from a commuter to a US resident. The Canadian departure tax applies, the day-count resets, and you file as a Michigan resident going forward. If you were previously relying on the treaty tie-breaker to stay a Canadian resident despite significant US presence, the move eliminates that option.

Auto industry transfers. The Big Three (and their Canadian operations, Stellantis in particular) regularly transfer employees between Ontario and Michigan plants. These transfers may be permanent relocations or multi-year assignments. The tax treatment depends on whether the assignment severs Canadian residency (permanent relocation triggers departure tax) or maintains it (temporary assignment with no departure tax, but dual filing on both sides).

What happens on the Ontario side when I leave?

The standard departure sequence:

• Deemed disposition at fair market value of worldwide assets
• Final Canadian return covering January 1 to departure date, with Ontario provincial tax
• Ontario’s top provincial rate of about 20.5% (with surtax) applies if income exceeds $220,000
• T1161 and T1243 if applicable
• OHIP coverage continues until the end of the third month after you leave Ontario
• RRSP left open, TFSA closed

What other taxes does Michigan have?

Sales tax. Michigan’s sales tax is 6% with no local additions (one of few states with a uniform rate statewide). This is lower than Ontario’s 13% HST and simpler because there are no city or county add-ons.

Property tax. Michigan property taxes are assessed at 50% of true cash value (the “taxable value” is capped at inflation adjustments until a sale, when it resets to 50% of the sale price). Effective rates vary: Wayne County (Detroit suburbs) runs about 2.5% to 3.5% of market value, Oakland County (Troy, Birmingham) runs about 1.5% to 2.0%, and Washtenaw County (Ann Arbor) about 1.8% to 2.2%. These are among the highest property tax rates in the country and significantly higher than most Ontario municipalities.

Estate and inheritance tax. Michigan has no state estate tax and no inheritance tax. Only the federal estate tax applies ($13.61 million exemption for US citizens and residents).

What should I do next?

The Canadian exit follows the standard departure checklist. On the Michigan side, the main planning items are the city income tax (check whether your city imposes one), the pension exemption eligibility (birth year and income type), and the property tax reset on purchase (the Proposal A cap resets to 50% of the new sale price).

• Departure tax checklist, the full Canadian exit sequence
• Windsor-Detroit commuter tax residency, the corridor-specific commuter guide
• RRSP and TFSA on a US move, federal treatment and reporting
• First US tax return after moving from Canada, the arrival-year mechanics
• State income tax for cross-border filers, comparing Michigan to other states
• Moving from Ontario to Florida, the no-income-tax corridor from the same province
• Moving from Canada to Ohio, the neighboring state with municipal income taxes on top of a low state rate
• Moving from Canada to Indiana, the nearby flat-rate state with county income taxes and a constitutional property tax cap

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