Sticky States, Explained

~7 min read·Updated September 2026

Calculator:Sticky-State Residency Checker: run your own answers.

Becoming a Canadian tax resident doesn't automatically end your US state's claim on you. Most states let go easily once you've genuinely moved. Five don't: California, New York, Virginia, New Mexico, and South Carolina apply aggressive domicile or statutory-residency rules that can keep taxing you as a resident years after you've left, if you haven't closed the right ties. Tax practitioners call these the "sticky states."

Two different tests, and why the distinction matters

Every state runs some version of a domicile test: your one true, permanent home, the place you intend to return to, which persists until you deliberately establish a new one. Simply leaving isn't automatically enough; the state wants to see you've actually replaced it. Some states also run a second, independent statutory residency test: cross a day-count threshold while keeping a place of abode in the state, and you're a resident regardless of where you're domiciled. The two tests matter separately: on states that run both, losing either one alone is enough to keep you on the hook, even if you'd win the other.

The five states, one at a time

California

California's Franchise Tax Board uses a "closest connections" test (Publication 1031): roughly 19 facts-and-circumstances factors, from where your family lives to where your driver's license and bank accounts are, with no single factor decisive on its own. Separately, spending more than nine months (roughly 274 days) in California in a year creates a rebuttable presumption of residency under Cal. Rev. & Tax Code §17016. California also offers a safe harbor: an uninterrupted 546+ days outside the state under a genuine employment contract can create a presumption of nonresidency, but that protection disappears if you have more than $200,000 of intangible income (interest, dividends, capital gains) in a year, or if avoiding California tax looks like a principal purpose of the move.

New York

New York runs domicile and statutory residency as two fully separate tests (NY Tax Law §605(b)). The statutory test requires both: 184 or more days physically present in New York in the tax year (any part of a day counts as a full day), and a "permanent place of abode" maintained for substantially all of the year. Note the number: New York's rule is popularly nicknamed the "183-day rule," but the actual statutory line is 184 days; exactly 183 does not trigger it. New York's "convenience of the employer" rule can also treat income from a remote job with a New York-based employer as New York-source income, independent of your own residency status.

Virginia

Virginia Code §58.1-302 defines an "actual resident" as anyone who, for more than 183 days in the tax year, maintains a place of abode in Virginia, regardless of domicile. Beyond the day count, Virginia is also notably skeptical of an ambiguous departure: without clear, contemporaneous evidence that a move is permanent rather than a temporary posting, Virginia tends to keep treating a departing taxpayer as still domiciled there.

New Mexico

New Mexico Administrative Code §3.3.1.9 sets its own bright line: 185 or more days physically present in New Mexico in a tax year makes you a resident regardless of domicile. Like New York, New Mexico also runs a fully separate domicile test, so falling under the day count doesn't settle the domicile question by itself.

South Carolina

The strictest of the five, and the one with no day-count escape hatch at all. South Carolina follows a domicile-of-origin rule (detailed in the Department of Revenue's own "Guide to Determining a Taxpayer's Domicile"): once established, your South Carolina domicile persists until you affirmatively establish a new one elsewhere, whether that's another state or another country, and simply moving away isn't enough on its own. South Carolina's Department of Revenue is known for scrutinizing that evidence closely, so a move straight to Canada needs the same kind of documented, deliberate proof of a new domicile as a move to another state would.

Worked example

Someone who left New York for Toronto 14 months ago, spent 40 days back in New York visiting family and for work, but never got around to updating their driver's license.

40 days is well under New York's 184-day statutory threshold, so the statutory residency test isn't triggered. But the domicile question is separate: an active New York driver's license is exactly the kind of retained tie an auditor checks first, and on its own it won't settle the question either way. The safer move is closing it out along with every other administrative tie, rather than assuming falling under the day count is enough by itself.

What actually moves the needle

ℹ️Change the paper trail the same month you move

Driver's license, vehicle registration, voter registration, and your primary bank and doctor are all things an auditor can check quickly and objectively. Updating each one right away is far stronger evidence than doing it later, or not at all.

📋Keep contemporaneous proof

A dated moving contract, a one-way flight, a lease termination, and a Canadian address on file with each institution above are the kind of evidence that holds up years later in an audit, when memory alone won't.

Where this comes from

New York's statutory residency test: NY Tax Law §605(b). Virginia's "actual resident" rule: Va. Code §58.1-302. New Mexico's physical-presence rule: N.M. Admin. Code §3.3.1.9. California's closest-connections factors and nine-month presumption: FTB Publication 1031 and Cal. Rev. & Tax Code §17016. Match the citation style in Methodology & Sources for the full list, including South Carolina's domicile-of-origin authority.

Run your own situation through the Sticky-State Residency Checker, and see the federal side of leaving the US at the US Exit Tax Estimator if you're also giving up a Green Card or citizenship (read the full guide for the covered-expatriate tests), or check Moving Back to Canada for what happens to your accounts once you're settled.