Guides
Practical explanations of how tax residency, state residency, and travel rules actually work. Short, useful, and paired with tools that check your situation.
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International Tax Residency — How It Actually Works
The 183-day rule is only part of it. Domicile, center of vital interests, and permanent home often matter more in international tax residency cases.
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Moving to Another State
How to actually leave a state — and why the first few years after the move are what decide the tax outcome.
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New York Statutory Residency
184 days plus a permanent place of abode makes you a New York resident — even if you're domiciled elsewhere. The audit rules are strict.
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Proving Where You've Been
A clear record of days, borders, and locations — the kind residency audits, tax filings, and visa checks ask for. Reconstruction is where cases break down.
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Schengen Area: The 90/180 Rule, Explained
The Schengen 90/180 rule limits non-visa visitors to 90 days in any rolling 180 across 29 European countries. Here's how to count it correctly and avoid overstay bans.
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The Jock Tax
Professional athletes owe state income tax in every state they play in. The bill depends on how many days they spent there — and whether they kept a record.
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US State Tax Residency
Two independent tests can pull you in — domicile and statutory residency. Either one can trigger state tax on worldwide income.
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