Residency Migration Reference
Moving from American Samoa to Missouri: Residency, Taxes, and What to Prove
The top income tax rate drops from Secondary sources cite individual rates ranging from roughly 4% to 15%; the American Samoa Government Tax Office administers the schedule directly and does not publish an English-language bracket table online, so a filer should confirm the current-year schedule directly with the Tax Office in American Samoa to 4.70% in Missouri. Establishing Missouri residency correctly is what protects that benefit.
Residency Tests Side by Side
American Samoa and Missouri both use a 183-day statutory residency threshold, so the day-count mechanics will feel familiar even though the underlying facts and enforcement differ.
| Factor | American Samoa | Missouri |
|---|---|---|
| Statutory Residency Test | American Samoa uses the same federal IRC section 937 bona fide residency test that applies to all five territories: the presence test, the tax home test, and the closer connection test, all of which must be met for the same tax year. This federal test determines whether someone's American Samoa-source income is exempt from U.S. tax; American Samoa's own independent tax code separately determines what is owed to the territory itself. | Missouri's residency test is set directly by statute, Mo. Rev. Stat. §143.101. A resident individual is either (1) a person domiciled in Missouri, unless they maintain no permanent Missouri residence, do maintain a permanent residence elsewhere, and spend no more than 30 days in Missouri during the tax year, or (2) a person not domiciled in Missouri who nonetheless maintains a permanent place of residence in Missouri and spends more than 183 days of the tax year in the state. This creates two independent paths into Missouri residency: domicile (with a narrow 30-day safe harbor for domiciliaries who've genuinely relocated), and a true statutory residency test for non-domiciliaries who keep a Missouri home and cross 183 days. |
| Domicile Test | Closer connection functions as the domicile test, weighing permanent home, family, personal belongings, social/cultural/religious affiliations (which in American Samoa often includes matai title and extended-family/aiga ties), banking, business activity, and the jurisdiction of a driver's license and voter registration, against the total of U.S. and foreign-country contacts under Treasury Regulation 1.937-1(c). | Missouri weighs the standard facts-and-circumstances domicile factors: where the taxpayer's permanent home is, driver's license and vehicle registration, voter registration, location of family and employment, and bank and financial ties. A Missouri domiciliary who wants to be treated as a nonresident under the statute's carve-out must both maintain no permanent Missouri residence and keep a permanent residence elsewhere, and spend 30 days or fewer in Missouri for the entire year, which is a materially tighter bar than most states' domicile exit tests. |
| Day Count Threshold | 183 days | 183 days |
| Any Part of a Day Rule | Any part of a day physically present in American Samoa counts as a full presence day, and a day spent in both American Samoa and the mainland U.S. counts toward American Samoa. Publication 570 includes an American Samoa-specific example involving a fishing-vessel worker: days spent on a vessel predominantly used in local and international waters do not count as a tax home outside the territory, a rule of particular relevance to American Samoa's tuna-fleet economy. | Missouri's statute does not define whether a partial day counts toward the 183-day count for non-domiciliaries who maintain a Missouri residence; the Department of Revenue has not published a bright-line partial-day rule comparable to New York's or California's any-part-of-a-day standard, so this is generally treated as a facts-and-circumstances presence question rather than a strict any-part-of-day trigger. |
| Presumptions | None published | The 30-day threshold functions as Missouri's exit safe harbor for domiciliaries: a Missouri domiciliary who maintains no permanent Missouri residence, does maintain one elsewhere, and spends 30 days or fewer in Missouri for the full year is treated as a nonresident despite retaining Missouri domicile. |
| Safe Harbors | 183-day presence test; 549-day / 3-year test; 90-day U.S. cap; Low U.S.-earned-income test; No significant U.S. connection | 30-day domiciliary safe harbor |
Leaving American Samoa
No widely published American Samoa-specific bona fide residency court case surfaced in research. Exit exposure runs through the same federal IRC section 937 framework used across the territories, but American Samoa's independent tax system and its status as one of the smaller, less economically active territories mean it has not attracted the concentrated IRS compliance-campaign attention that Puerto Rico's Act 60 program has.
Trailing Income
Bona fide residents of American Samoa may not exclude gain from the disposition of certain U.S.-connected property (stock in a U.S. corporation, U.S. real estate, and similar assets) held in the 10 years before becoming a bona fide resident; that gain remains U.S.-source and subject to U.S. tax under the special rules in Publication 570. This 10-year lookback applies the same way to Puerto Rico. For the mirror-code territories (CNMI, Guam, and the USVI), Publication 570 frames the same 10-year-lookback property differently: that gain simply will not qualify for the local tax-reduction or rebate mechanisms those territories otherwise offer bona fide residents on territory-source income.
Part-Year Filing
Form 390 is American Samoa's individual tax return. A bona fide resident generally files an American Samoa return reporting gross income from worldwide sources and files a U.S. return only if required, excluding American Samoa-source income using Form 4563 attached to Form 1040 or 1040-SR. A U.S. citizen who was a bona fide American Samoa resident for at least two years before the move can qualify as a bona fide resident for the part of the tax year before the move, under the same year-of-move framework Publication 570 applies across the territories.
Enforcement Methods
Common Exit Mistakes
Establishing Missouri Residency
| Action | Agency | Deadline |
|---|---|---|
| Title and register vehicles in Missouri | Missouri Department of Revenue, Motor Vehicle Bureau | within 30 days of becoming a Missouri resident |
| Obtain a Missouri driver's license | Missouri Department of Revenue | within 30 days of establishing residency |
| Register to vote | Missouri Secretary of State | postmarked by the 4th Wednesday before an election |
| File a Property Tax Credit claim if income-eligible | Missouri Department of Revenue | with the annual return, generally by April 15 |
Declaration of Domicile
Missouri has no formal declaration-of-domicile filing comparable to Florida's county-recorded declaration. Missouri domicile is established through conduct: home purchase or lease, driver's license, vehicle titling, voter registration, and the pattern of actual presence, weighed against the statute's 30-day and 183-day thresholds depending on which side of the domicile question the taxpayer sits on.
Homestead
Missouri's Property Tax Credit ("circuit breaker") is income-capped and limited to homeowners and renters who are seniors (65+) or 100% disabled; it is not a general homestead exemption available to all homeowners the way Florida's or Texas's are. It reimburses a portion of real estate taxes or rent paid, up to $1,100 for homeowners and $750 for renters, and is claimed annually rather than filed once as a standing declaration.
Voter Registration
Your voter registration form must be postmarked by the 4th Wednesday before the election. Register online, by mail, or in person through the Missouri Secretary of State. https://www.sos.mo.gov/elections/goVoteMissouri/register
Vehicle Registration Deadline
30 days
New Resident Tax Traps
Missouri taxes worldwide income from the date Missouri residency begins, reported on the full-year Form MO-1040 or as a part-year filer using Form MO-NRI to allocate income. New residents moving from a no-tax state should note Missouri's deduction for federal income tax paid is a genuine offset most other states don't offer, but it phases out at higher income and does not eliminate the need to plan for both Missouri income tax and the state's above-average combined sales tax in the St. Louis and Kansas City metros.
What Changes on Tax
American Samoa Top Rate
Secondary sources cite individual rates ranging from roughly 4% to 15%; the American Samoa Government Tax Office administers the schedule directly and does not publish an English-language bracket table online, so a filer should confirm the current-year schedule directly with the Tax Office
Missouri Top Rate
4.70%
Moving from American Samoa to Missouri drops the top marginal income tax rate from about 15% to about 4.7%, a reduction of roughly 10.3 percentage points.
Withholding Reciprocity
American Samoa and Missouri do not have a wage-withholding reciprocity agreement with each other, so this move follows ordinary source-state and resident-state filing rules rather than a reciprocity exception.
Community Property Transition
American Samoa and Missouri both use common law, equitable-distribution marital property rules, so no community property transition applies to this move.
Beyond Income Tax
American Samoa
Capital gains: American Samoa taxes capital gains under its own code, modeled on but not identical to the federal framework; no separate 0%-style preferential regime comparable to Puerto Rico's Act 60 has surfaced in research, and bona fide residents should confirm current treatment directly with the ASG Tax Office.
Estate or inheritance tax: No separate American Samoa territorial estate or inheritance tax was identified in research; because most land is communally held rather than individually owned and cannot pass through ordinary inheritance to non-Samoans, estate planning in American Samoa is governed as much by customary land law (matai/family succession) as by tax law.
Property tax: Effective property tax rates are described by secondary sources as very low, well under 1% of property value annually, but the more important fact for most people is that over 90% of American Samoa's land is communal land held by extended families under the matai (chief) system and generally cannot be purchased outright by non-natives, so 'property tax' is a minor issue for most newcomers compared to the land-access question itself.
Sales tax: American Samoa has no general state-level sales tax comparable to a mainland state; secondary sources describe local excise-style and business taxes rather than a broad retail sales tax, and current details should be confirmed with the ASG Tax Office.
Missouri
Capital gains: Missouri has no separate capital gains rate; gains are included in Missouri adjusted gross income and taxed at the same graduated rates as ordinary income. Missouri does allow a partial subtraction for certain capital gains reinvested through Missouri's income-tax deduction for the sale of low-income housing tax credits and some qualified small-business stock gains, which is narrower than a general exclusion.
Estate or inheritance tax: None. Missouri has no estate tax and no inheritance tax; only the federal estate tax can reach a Missouri decedent's estate.
Property tax: Effective property tax rate on owner-occupied housing runs about 0.89%, below the national average. Missouri does not use a Florida-style homestead exemption; instead it runs the Property Tax Credit ("circuit breaker"), an income-capped rebate of up to $1,100 for qualifying senior or disabled homeowners, and up to $750 for qualifying renters.
Sales tax: State rate is 4.225%, with a statewide average combined rate (state plus local) of about 8.44%, since Missouri allows extensive city, county, and special-district sales tax layering, particularly in the St. Louis and Kansas City metro areas.
Who This Move Applies To
Travel Nurses
In American Samoa
American Samoa has essentially no travel-nurse assignment market comparable to the 50 states or even Guam; the territory's single hospital system (LBJ Tropical Medical Center) is not a typical travel-nursing agency placement, so this persona is largely not applicable here. The underlying federal tax-home principles would apply identically if it ever were.
In Missouri
Missouri has no statutory carve-out for travel nurses distinct from its general residency test; the federal tax-home question under IRS Publication 463 governs stipend treatment, and Missouri residency then follows the statutory domicile/183-day framework like any other taxpayer. Missouri's major hospital systems in St. Louis, Kansas City, and Springfield draw a steady stream of travel nursing assignments, and a nurse who claims an out-of-state tax home while actually renting and living in Missouri most of the year risks the same tax-home disallowance pattern documented nationally on travel-nurse forums, which would also expose them to Missouri's statutory 183-day resident test if they maintain a Missouri residence.
Professional Athletes
In American Samoa
No major U.S. professional sports franchise is based in American Samoa, and there is no jock-tax apportionment regime. American Samoa is, however, well known as an outsized per-capita source of NFL and college football talent; players who grew up there and later earn NFL income are taxed on that income under the ordinary duty-day rules of whatever states and teams they play for, not under any American Samoa-specific regime.
In Missouri
Missouri is home to the Chiefs (whose stadium sits in Missouri just across the state line from Kansas), Royals, Cardinals, and Blues. Missouri applies duty-day apportionment to nonresident professional athletes' income earned from games and team activities in Missouri, consistent with how most income-tax states administer the jock tax, and Missouri-domiciled players on these teams owe Missouri tax on their full income before credits for tax paid to other states where they play road games.
Snowbirds, Long Visitors, and RVers
In American Samoa
Long-term visitors face the same closer-connection analysis as anywhere else, complicated by the land-tenure system: without the ability to buy communal land outright, a snowbird-style arrangement in American Samoa typically means a long-term lease rather than home ownership, which changes the kind of documentary evidence (lease agreements, utility bills in the resident's name) that would need to substitute for a deed or homestead filing in a residency dispute.
In Missouri
A Missouri snowbird who is Missouri-domiciled and winters in Florida or Arizona only escapes Missouri tax as a nonresident if they maintain no permanent Missouri residence, keep a permanent residence in the destination state, and spend 30 days or fewer in Missouri for the entire year, which is a much tighter safe harbor than most states offer. A non-domiciled owner of a Missouri vacation or second home faces the opposite risk: maintaining a permanent Missouri residence and crossing 183 days in the state during the year makes them a Missouri statutory resident regardless of where they consider their true domicile.
Remote Workers
In American Samoa
American Samoa has no convenience-of-the-employer rule, and because it runs a separate tax code rather than a mirror code, a mainland employer's payroll system is even less likely to be set up to handle American Samoa withholding correctly than for Guam or the USVI. A remote worker relocating to American Samoa should expect to actively manage employer withholding and filing status rather than assume standard mainland payroll processes will translate correctly.
In Missouri
Missouri has no convenience-of-the-employer rule, so a genuine Missouri resident working remotely for an out-of-state employer is taxed as a Missouri resident regardless of employer location, and a nonresident working remotely for a Missouri employer generally is not pulled into Missouri tax solely because the employer is headquartered there. The recurring Missouri-specific version of this is Kansas City and St. Louis metro commuters whose employer sits on the other side of a state line; because Missouri applies its statutory 183-day and permanent-residence test rather than a convenience rule, actual physical work location and Missouri presence both matter for anyone with ties on both sides.
Military
In American Samoa
American Samoa follows the federal Servicemembers Civil Relief Act (SCRA) and Military Spouses Residency Relief Act (MSRRA), and Publication 570 specifically addresses active-duty members whose state of legal residence is American Samoa: their military pay is American Samoa-source income and follows the U.S. Government employee wage rules described above regardless of duty station, meaning it is taxable on the U.S. return even though they are American Samoa residents.
In Missouri
Missouri follows the federal Servicemembers Civil Relief Act and Military Spouses Residency Relief Act. A servicemember whose home of record is Missouri remains a Missouri domiciliary and taxpayer regardless of duty station, and Missouri does not tax a nonresident servicemember's military pay solely because they are stationed in Missouri under orders. Fort Leonard Wood and Whiteman Air Force Base are the state's major installations, and a nonmilitary spouse residing in Missouri solely due to military orders can elect the servicemember's state of legal residence under MSRRA.
Airline Crew
In American Samoa
Pago Pago International Airport has limited scheduled service compared to Guam or the mainland, and American Samoa is not a significant airline crew base; the federal carve-out at 49 U.S.C. section 40116 for air carrier employees would apply the same way it does elsewhere if it became relevant, but this is a marginal persona for American Samoa specifically.
In Missouri
Federal law (49 U.S.C. §40116) limits any state's ability to tax an air carrier employee's pay to the employee's state of residence and any state where more than 50% of pay is earned. Kansas City International and St. Louis Lambert are both significant airports, and Southwest and other carriers maintain crew presence in the Kansas City metro; crew based there who are domiciled elsewhere are protected by the federal carve-out from full Missouri taxation solely because Missouri is their duty station.
Tools for This Move
American Samoa to Missouri FAQ
Is American Samoa's tax system the same as Guam's or the US Virgin Islands'?+
No. Guam, the USVI, and the CNMI use a 'mirror code' that applies the U.S. Internal Revenue Code word for word with the territory's name substituted in. American Samoa has its own separate and independent tax system: A.S.C.A. section 11.0403 incorporates much of the Internal Revenue Code by reference, so the law is modeled on federal law, but rates and specific rules are set independently by the American Samoa Government, not automatically updated when Congress changes the federal code.
How many days can I spend in Missouri before I owe Missouri tax as a resident?+
It depends on whether you're Missouri-domiciled or not. A Missouri domiciliary only escapes Missouri residency by maintaining no permanent Missouri home, keeping a permanent home elsewhere, and spending 30 days or fewer in Missouri for the whole year, a tight safe harbor. Someone who is not Missouri-domiciled but keeps a permanent Missouri residence becomes a Missouri statutory resident if they spend more than 183 days in the state during the year.
Can I buy a house in American Samoa the way I would in any other U.S. territory?+
Generally, no. Over 90% of American Samoa's land is communally owned by extended families under the matai (chief) system, and non-natives cannot acquire that land outright; transferring communal land to individual ownership requires Land Commission recommendation and Governor approval, or 30 years of adverse possession. Most non-native residents live under a long-term lease rather than owning a home, which changes what proof-of-residence documentation looks like compared to anywhere else in this guide.
I moved from Kansas City, Missouri to the Kansas side of the metro but I still cross the state line to visit family and shop constantly. Am I still a Missouri resident?+
Not automatically, but you need to actually meet Missouri's 30-day safe harbor if you're still Missouri-domiciled: no permanent Missouri residence maintained, a real permanent residence on the Kansas side, and 30 days or fewer physically in Missouri for the full year. Frequent short visits to family or for shopping count toward that 30-day total, so a Kansas City metro mover who crosses the state line often should track those days carefully.
Do I pay U.S. federal income tax on income I earn in American Samoa?+
If you're a bona fide American Samoa resident under the federal presence, tax home, and closer connection tests, your American Samoa-source income is generally exempt from U.S. federal tax. You do need to report worldwide income on your American Samoa return, and if you have non-American Samoa-source income above the filing threshold, you'll still need to file a U.S. return excluding the American Samoa income using Form 4563.
What form do I file if I lived in Missouri for only part of the year?+
Part-year residents and nonresidents file Form MO-1040 together with Form MO-NRI, the Nonresident/Part-Year Resident Income Percentage schedule, which calculates what share of your income is taxable by Missouri based on the ratio of Missouri-source income to total income.
I work for the U.S. Government in American Samoa. Is my pay exempt like other residents' income?+
No, and this is a common and costly misunderstanding. Publication 570 specifically requires that wages and cost-of-living allowances paid by the U.S. Government for services performed in American Samoa be included in gross income on both your U.S. and American Samoa income tax returns, regardless of whether you are a bona fide American Samoa resident. A foreign tax credit is available for the American Samoa tax paid on the same income to avoid double taxation, but the U.S. filing obligation itself does not go away.
Does Missouri tax Social Security benefits?+
No, Missouri exempts Social Security and Social Security Disability benefits from state income tax for most filers, and separately provides a public pension exemption and a private pension deduction that phases out at higher income.
What if I'm not a U.S. citizen born in American Samoa? Can I still vote?+
People born in American Samoa are U.S. nationals, not automatically U.S. citizens, unless a parent was a U.S. citizen or they separately naturalize. This status allows a U.S. passport and mainland residency rights, but American Samoa residents, whether national or citizen, do not vote in U.S. presidential elections, and the territory's Congressional delegate is non-voting. Local territorial elections are separately administered by the American Samoa Election Office.
Is Missouri an aggressive state for residency audits?+
No, Missouri is not on the short list of states practitioners and taxpayer forums consistently flag as aggressive on residency, a list dominated by New York, California, New Jersey, Connecticut, Maryland, and Minnesota. That said, Missouri's statutory 183-day test for non-domiciliaries who keep a Missouri residence is a real, enforceable trigger, unlike states that rely purely on subjective domicile factors.
How many days do I need to be in American Samoa to count as a bona fide resident?+
183 days in the tax year is the cleanest path under the federal presence test, but there are four alternatives, including 549 days across the current and two prior years with at least 60 days each year. Meeting a presence prong alone is not enough; you also need to pass the tax home test and the closer connection test, which for American Samoa often weighs matai title, extended-family (aiga) ties, and lease-based home arrangements rather than conventional homeownership.
What is Missouri's Property Tax Credit and do I qualify?+
It's Missouri's "circuit breaker" program, an income-capped rebate of up to $1,100 for qualifying senior (65+) or disabled homeowners and up to $750 for qualifying renters, based on real estate taxes or rent paid. It is not a general homestead exemption available to every homeowner; eligibility is limited by age or disability status and household income.
Considering the reverse move?
Missouri to American Samoa
Moving the other direction is a different fact pattern, not a mirror image: exit risk and establishment mechanics both flip.
View the Missouri to American Samoa guideAlso Consider, Leaving American Samoa
American Samoa to Missouri Reading
Reviewed Against 12 Primary Sources
ResidencyIQ organizes public residency research into a reviewable reference. It does not provide legal or tax advice. Consult a qualified professional before making a residency decision.
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