If you’ve ever wondered how your presence—or absence—in a country, state, or even your own home office affects your tax bill, you’re in the right place. By the end of this article, you’ll understand the tests that determine residency in the US and Canada, how dual-status aliens file, what happens when you give up a green card, why your “tax home” matters, how states decide who owes what, and special rules for digital nomads.

Defining Tax Residency in the US

The IRS uses two main hurdles to decide if you’re a US tax resident: the Green Card Test and the Substantial Presence Test. If you clear either, you’re taxed on worldwide income.

Green Card Test

You’re a US tax resident if you’re a lawful permanent resident at any point in the year. That means you hold a green card—even if you live mostly abroad.

Substantial Presence Test

You meet this test if you’re physically in the US:
– At least 31 days in the current year, and
– 183 days over a three-year window (all days this year + 1/3 of days last year + 1/6 of days the year before).

People like certain students, teachers, and diplomats are exempt individuals, so their days don’t count. If you don’t hit 183 but feel more connected abroad, you can file Form 8840 for the Closer Connection Exception to avoid residency status. See the IRS’s Substantial Presence Test guidelines for details on counting days and exclusions.

First-Year Choice

If you arrive mid-year, you can choose to be treated as a resident starting the day you meet the substantial presence test rather than January 1. That can help you claim deductions sooner and potentially lower your overall tax burden for that year.

Canadian Residency Rules

Canada looks at your residential ties to decide your status. There are three categories:

• Factual Resident: You maintain significant ties like a home or family.
• Deemed Resident: You spend 183+ days in Canada but lack major ties.
• Non-Resident: Your ties and days in Canada are limited.

Residents pay tax on global income; non-residents only on Canadian-source income. Those leaving face a “departure tax,” which treats property as sold at fair market value on the day you exit. Check out the Canada Revenue Agency’s departure tax rules for all the details on reporting and valuation.

Dual-Status Aliens: Splitting Your Tax Year

If you move into or out of the US mid-year, you might be both a nonresident and a resident in the same tax year. You’ll file a dual-status return:

1. Nonresident Portion: Report US-source income earned before residency.
2. Resident Portion: Include worldwide income after becoming a resident.

You can find step-by-step guidance in the TurboTax guide on dual-status aliens which explains how to pro-rate deductions and credits for each part of the year.

Expatriation Tax: Giving Up Your Green Card

If you’ve held a green card at least 8 of the last 15 years and decide to relinquish it, you may be a “covered expatriate” and owe an exit tax on unrealized gains above the exclusion amount (about $821,000 in 2022). For a clear breakdown of how that number is calculated and what counts as a taxable gain, see Investopedia’s guide to the US expatriation tax. According to IRS data, 2,369 individuals triggered these rules in 2019 alone.

Tax Home and Its Impact on Benefits

Your tax home is the location of your main business, job, or post of duty—even if you live somewhere else.

“Your tax home is the general area of your main place of business or work,” says IRS Publication 463.

Why it matters:
– Only expenses incurred away from your tax home qualify for deductions.
– To claim the Foreign Earned Income Exclusion (up to $112,000 in 2022), you must have a tax home in a foreign country and meet the bona fide residence or physical presence test. You can read more in H&R Block’s overview of the Foreign Earned Income Exclusion.

For a deeper dive into what counts as your tax home and how to document it properly, check out Nolo’s explanation of tax home.

State-Level Residency: Juggling Multiple Jurisdictions

States have their own rules. Most consider you a resident if you’re domiciled there or spend a certain number of days within state lines.

Common tests:
– Domicile: Your permanent home or “nexus.”
– Physical Presence: 183-day rule or similar.

If you move from California to Florida but keep a California lease, you might owe California tax—and lose no-tax Florida’s perks.

Tax Foundation’s analysis of state residency rules is a great resource for seeing how different states approach domicile and day-count tests.

Tips for establishing or abandoning residency
– Close local bank accounts and cancel in-state licenses to show abandonment of domicile.
– Track days in each state with a digital diary or dedicated app.
– Consult an expert if you spend significant time in two states—small nuances can lead to unexpected tax bills.

Special Considerations for Digital Nomads

Whether you’re hopping between Bali, Berlin, and Boston, or working from a beach, tax rules can catch you by surprise:

• No fixed abode can complicate your tax home, making it tricky to claim travel deductions.
• You may inadvertently meet the IRS Substantial Presence Test if you spend too many days in the US.
• Host countries often have their own 183-day tests for tax residency, which could trigger local filing obligations.

According to MBO Partners’ 2020 State of Independence Report, 10.9 million Americans identified as digital nomads in 2020—a growing group facing complex multi-jurisdictional tax landscapes.

Nomad tips
1. Keep meticulous travel logs to prove days in and out of each country or state.
2. Use statutory residency calculators for both home and host countries.
3. Seek a tax professional familiar with remote-worker rules—every country’s laws can differ wildly.

Putting It All on the Table

Taxes linked to residency can feel like a maze, but you don’t have to wander lost. Whether you’re claiming the Closer Connection Exception, planning an exit tax strategy, or figuring out which state or country gets your dollars, a clear record, the right forms, and timely advice can keep your tax picture sharp. Now you know the tests, the traps, and the workarounds—so you can focus on wherever “home” takes you next.