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Moving abroad, state taxes and treaties
A move abroad can affect state residency, filing dates, treaty questions and Social Security coverage without ending federal filing duties. State rules depend on domicile, days, an available home and continuing ties. Treaties often contain limits and saving clauses, while totalization agreements address Social Security coverage. This guide separates those questions and directs you to the official rule for the state or country involved.
Start with these checks
Do I still have state tax ties after moving abroad?
Organize the domicile, day-count, home, family, license and state-source income facts your former state may examine after you move abroad.
50-state domicile and ties checker
Organize the facts a state may use when reviewing whether you kept or changed your domicile.
What should I do before moving abroad?
Build a practical checklist for tax, travel, work, voting and records before your move.
How many days have I spent in my host country?
Count entered presence days for one country and keep tax-residence exceptions visible.
Is there a U.S. income tax treaty with my country?
Find official treaty materials and the articles most relevant to your question.
Find a U.S. Social Security agreement
Check whether your country appears on the current SSA agreement list and what coverage question comes next.
More tools in this topic
- Which U.S. tax dates apply in my moving year?: Put your move date beside the U.S. filing, residence and recordkeeping questions that need review.
- Multi-country presence tracker: Compare calendar-day totals for two countries without turning those totals into a residency verdict.
- What should I check before working remotely abroad?: Review immigration, employer, payroll, tax and Social Security questions before working from another country.
- What does a treaty saving clause mean for me?: Understand why a treaty benefit may be limited for a U.S. citizen or resident.
- What should I verify for my host-country tax calendar?: Build a source-led checklist of local and U.S. deadline categories, then verify the exact local dates with the official authority.
- Find official tax sources for my country: Go straight to the reviewed government source for your launch country and topic.
- Which U.S. and local filing duties should I compare?: Put two countries' residence, income, filing and treaty questions into one review list.
- Who should I tell when my address changes abroad?: Create a practical notification list for the IRS, state agencies, voting, benefits and travel services.
- What should I do before returning to the U.S.?: Organize your federal, state, work, health, address and foreign-record tasks before returning.
How to use this guide
Each tool gives a complete first-pass result from the facts you enter and keeps its official sources and review date visible. It is general information, not tax or legal advice. Check unusual facts with a qualified professional.
Guide updated .