Residency Migration Reference
Moving from American Samoa to Montana: 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 5.65% in Montana. Establishing Montana residency correctly is what protects that benefit.
Residency Tests Side by Side
American Samoa's statutory residency test uses a 183-day threshold. Montana does not use a simple day-count threshold; it applies a facts-and-circumstances test instead.
| Factor | American Samoa | Montana |
|---|---|---|
| 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. | Under ARM 42.15.109, implementing Mont. Code Ann. §15-30-2101, an individual is a Montana resident for income tax purposes if domiciled in Montana or if the individual maintains a permanent place of abode in Montana. Unlike most states, Montana's rule does not pair the permanent-place-of-abode prong with a codified day-count threshold; residency for the abode prong is instead determined, per the regulation's own language, 'in light of all facts and circumstances.' |
| 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). | 'Domiciled' is defined by ARM 42.2.304 as having a residence in Montana as determined under Mont. Code Ann. §1-1-215, the state's general residence statute. That statute treats residence as the place a person returns to in seasons of repose when not called elsewhere for labor or a special or temporary purpose, holds that a person can have only one residence, that a residence cannot be lost until another is gained, and, notably, that if a person claims a Montana residence for any purpose, that location becomes the person's residence for all purposes absent a specific statutory exception. A change of residence requires the union of act and intent, not one alone. |
| Day Count Threshold | 183 days | No fixed threshold |
| 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. | Montana's regulations do not publish a specific any-part-of-a-day counting convention, because the permanent-place-of-abode prong of the residency test has no attached day-count threshold at all; the Department instead applies a facts-and-circumstances standard to the abode question. |
| Presumptions | None published | None published as a distinct numeric presumption. The general residence statute's 'claim a residence for any purpose, and it's your residence for all purposes' rule functions as Montana's closest analog to a presumption: registering to vote, obtaining a resident hunting or fishing license, or otherwise claiming Montana residency for an unrelated purpose can be used as evidence of Montana domicile for tax purposes. |
| 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 | None published |
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 Montana Residency
| Action | Agency | Deadline |
|---|---|---|
| Get a Montana driver's license | Montana Motor Vehicle Division | within 60 days of establishing residency |
| Title and register vehicles in Montana | Montana Motor Vehicle Division / county treasurer | within 60 days of establishing residency |
| Register to vote | Montana Secretary of State / county election office | regular registration closes 30 days before an election; late registration continues through Election Day (subject to a noon-to-5pm blackout the day before) |
Declaration of Domicile
Montana has no formal declaration-of-domicile filing comparable to Florida's for tax purposes. What Montana does have is a homestead declaration, a separate, unrelated legal mechanism (see Homestead below) that protects home equity from creditors, not a domicile filing, though a recorded homestead declaration is one more piece of paper trail pointing to where a person has claimed Montana as home.
Homestead
Montana's homestead exemption (Mont. Code Ann. §70-32-104) is not automatic: a person must execute, notarize, and record a written declaration of homestead with the county clerk and recorder (§70-32-105) to claim it. It protects home equity from most creditors up to a dollar cap that started at $350,000 in 2021 and adjusts upward roughly 4% a year. Because the declaration is a deliberate, dated, recorded filing rather than something automatic, it functions as unusually strong documentary evidence of when a person claimed a Montana home, useful for establishing residency, but also a loose end that should be released if the property stops being the primary home.
Voter Registration
Regular registration closes 30 days before an election; Montana also allows late registration in person through Election Day itself, though a court fight over Senate Bill 490 has centered on a proposed blackout period the day before Election Day, so voters moving close to an election should confirm current rules with their county election office. https://votemt.gov/voter-registration/
Vehicle Registration Deadline
60 days
New Resident Tax Traps
Montana taxes worldwide income from the date Montana domicile begins, requiring Montana Form 2's part-year apportionment for the year of the move. Because Montana's general residence statute treats a claim of Montana residency for any purpose as a claim for all purposes, a new arrival who registers to vote or gets a resident hunting license before formally establishing the rest of their domicile picture may find the state (or their old home state) pointing to that early claim as the actual date domicile began.
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
Montana Top Rate
5.65%
Moving from American Samoa to Montana drops the top marginal income tax rate from about 15% to about 5.65%, a reduction of roughly 9.35 percentage points.
Withholding Reciprocity
American Samoa and Montana 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 Montana 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.
Montana
Capital gains: Long-term capital gains are carved out of ordinary taxable income and taxed on their own, lower two-bracket schedule: 3.0% and 4.1% for 2026 and 2027, with the bracket break points tracking the ordinary-income bracket structure. Short-term gains are taxed as ordinary income at the regular 4.7%/5.65% rates.
Estate or inheritance tax: None. Montana has no estate tax and no inheritance tax.
Property tax: Effective rate is roughly 0.61% of value. Montana's homestead exemption is not a property-tax break at all but a creditor-protection filing (see Establish); property tax relief instead comes through separate, income-limited programs like the Property Tax Assistance Program and Elderly Homeowner/Renter Credit.
Sales tax: Montana has no general state or local sales tax, one of only five states without one. This is also why out-of-state buyers sometimes register high-value vehicles and RVs through Montana LLCs to avoid their home state's sales tax, a business-registration workaround that has no bearing on personal tax domicile.
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 Montana
Billings, Missoula, and Montana's regional hospital systems generate real but modest travel-nurse demand given the state's population. A nurse genuinely domiciled in Montana who takes Montana contracts is taxed as an ordinary resident. A nurse claiming a Montana tax home while working elsewhere needs a real, regularly used, duplicated-expense Montana residence, since Montana's facts-and-circumstances domicile standard applies the same evidentiary weight to a claimed tax home as it does to any other domicile dispute.
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 Montana
Montana has no major professional franchise in the four big US leagues, so jock-tax exposure runs primarily one direction: Montana-domiciled athletes playing professionally elsewhere are taxed by those other states under their own apportionment rules, while nonresident athletes competing in occasional Montana events (college sports revenue aside) owe Montana tax on Montana-source income under standard nonresident sourcing.
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 Montana
Because Montana's permanent-place-of-abode test has no codified day-count threshold, a long-term visitor or second-home owner in a resort area like Whitefish, Big Sky, or the Flathead Valley cannot rely on staying under a specific number of days the way they could in a state with a 183-day rule; the Department instead weighs the full facts and circumstances of how the home is used and how much time is actually spent there. Montana's own domiciliaries who winter in Arizona or elsewhere remain presumed Montana residents under the 'residence cannot be lost until another is gained' rule unless they affirmatively establish a new 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 Montana
Montana has no convenience-of-employer rule: a nonresident performing all work physically outside Montana for a Montana-based employer is not Montana-taxed on those wages. Montana, particularly Bozeman, Missoula, and the Flathead Valley around Whitefish and Kalispell, has drawn a wave of remote workers relocating from higher-cost states since 2020, and the lack of a sales tax is a frequently cited draw alongside the income tax simplification.
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 Montana
Montana follows the federal Servicemembers Civil Relief Act and Military Spouses Residency Relief Act. A service member stationed in Montana under orders (Malmstrom Air Force Base near Great Falls is the state's major installation) does not become Montana-domiciled from the posting alone. Montana's 2024 tax simplification added a subtraction for certain resident working military retirees and military survivor-benefit recipients, on top of the general federal SCRA/MSRRA protections.
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 Montana
Montana's airports (Bozeman Yellowstone International being the busiest) are not major airline crew bases, so the more relevant federal carve-out for Montana residents working in transportation is the interstate rail and motor carrier employee rule: federal law limits taxation of such employees with regularly assigned duties in more than one state to their state of residence.
Tools for This Move
American Samoa to Montana 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.
Does Montana use the 183-day rule?+
No. Montana's residency test is domicile or maintaining a permanent place of abode in the state, but unlike most states, the permanent-place-of-abode prong has no codified day-count number at all. The Department looks at all the facts and circumstances of how the home is used rather than counting to a specific threshold like 183 days.
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.
If I get a Montana hunting license or in-state tuition after I've moved away, does that make me a Montana resident again?+
It can be used against you. Montana's general residence statute says that if you claim Montana residence for any purpose, that becomes your residence for all purposes unless a specific statutory exception applies. Claiming a resident hunting license or resident tuition after claiming to have left is exactly the kind of inconsistent claim the Department, or your new home state, could point to.
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.
Does registering my RV or truck through a Montana LLC make me a Montana resident?+
No. Registering a vehicle through a Montana-formed LLC is a business registration, not a personal residency claim, and by itself has no bearing on your individual tax domicile. It doesn't make you a Montana resident, and it doesn't get you out of your actual home state's residency test either.
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.
What form do I file if I only lived in Montana part of the year?+
Montana Form 2, the Individual Income Tax Return, filed with the part-year/nonresident schedule, which apportions your income between the period you were a Montana resident and the period you were not.
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.
Does Montana tax Social Security?+
Yes, but only to the extent it's included in your federal taxable income, following a 2024 simplification that ended Montana's older, separate and more restrictive Social Security worksheet. Taxpayers 65 and older also get a flat $5,500 subtraction from federal taxable income ($11,000 for a joint return where both spouses are 65+).
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.
Does Montana tax capital gains differently from ordinary income?+
Yes. Long-term capital gains are pulled out of ordinary taxable income and taxed on their own lower two-bracket schedule, 3.0% and 4.1% for tax years 2026 and 2027, well below the 4.7%/5.65% rates on ordinary income. Short-term gains are taxed as ordinary income at the regular rates.
Considering the reverse move?
Montana 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 Montana to American Samoa guideAlso Consider, Leaving American Samoa
American Samoa to Montana Reading
Reviewed Against 19 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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