American Samoa Tax System: How Territorial Taxation Works

American Samoa operates under a distinct territorial tax framework that diverges significantly from the federal Internal Revenue Code applied across the fifty states and most other U.S. territories. The territory administers its own mirror tax system, collects revenues independently, and maintains a separate relationship with federal tax law that affects businesses, residents, and qualifying corporations differently than standard U.S. jurisdictions. This page provides reference-grade detail on the structure, mechanics, classifications, and common points of confusion within the American Samoa tax system.

• Definition and scope
• Core mechanics or structure
• Causal relationships or drivers
• Classification boundaries
• Tradeoffs and tensions
• Common misconceptions
• Checklist or steps (non-advisory)
• Reference table or matrix

Definition and scope

American Samoa's tax system is classified as a mirror tax system — a framework in which territorial tax law substantially replicates the U.S. Internal Revenue Code (IRC) but is administered and collected by the territorial government rather than the U.S. Internal Revenue Service. The legal basis derives from Section 931 and related provisions of the IRC, as well as the American Samoa Revised Code (ASCA Title 11), which codifies territorial tax obligations locally.

The territorial government collects income taxes, business privilege taxes, excise taxes, and property taxes. Federal tax revenues collected from American Samoa residents do not flow to the U.S. Treasury in the same manner as from the fifty states — instead, the American Samoa Treasury retains most of those proceeds. This arrangement is established under 48 U.S.C. § 1661, which governs the financial relationship between the territory and the federal government.

The American Samoa Government Budget and Finance framework depends substantially on this locally retained revenue stream, alongside federal grants and appropriations.

Core mechanics or structure

Income Tax Administration

The American Samoa Tax Office, operating under the Department of the Treasury, administers individual and corporate income taxes. The tax rates mirror those of the federal IRC but are applied through territorial filings. Residents file with the American Samoa Tax Office rather than with the IRS — with a limited exception for individuals who have both U.S. source income and American Samoa source income, who may face split filing obligations.

Individual income tax rates in American Samoa track the federal rate schedule, which as of the 2017 Tax Cuts and Jobs Act (Pub. L. 115-97) ranges from 10% to 37% for ordinary income. Because American Samoa adopts these brackets via its mirror code, the territory's individual rates reflect the same graduated structure.

Business Privilege Tax

American Samoa levies a Business Privilege Tax (BPT) on gross revenues of businesses operating within the territory. The BPT functions as an alternative to a corporate income tax for certain qualifying entities. The rate structure and exemption thresholds are set under ASCA Title 11, and businesses are required to register with the American Samoa Department of Commerce before BPT obligations are assessed.

Excise and Import Taxes

Excise taxes apply to goods imported into American Samoa, reflecting the territory's geographic isolation and reliance on imported commodities. These taxes apply at the point of entry and constitute a material share of territorial revenue. Rates vary by commodity category and are established through the legislative process of the American Samoa Legislative Branch — Fono.

Section 936 / Economic Development Credits

Historically, Section 936 of the IRC provided tax incentives to U.S. corporations operating in American Samoa, particularly in the tuna cannery sector. Congress repealed Section 936 as applied to Puerto Rico in 1996 but extended an analogous credit for American Samoa under Section 119 of Pub. L. 109-432 (the Tax Relief and Health Care Act of 2006). This credit was periodically renewed through subsequent legislation, though its long-term status has been subject to congressional reauthorization rather than permanent codification.

Causal relationships or drivers

American Samoa's distinct tax structure is driven by three intersecting factors: its unincorporated territory status, its economic development imperatives, and its historically limited integration into the federal tax apparatus.

As an unincorporated territory under U.S. constitutional doctrine (established through the Insular Cases series, 1901–1922), American Samoa is subject to federal law only where Congress expressly extends it. The IRC applies in a modified form rather than wholesale, giving the territorial legislature authority to shape its own tax code within those parameters. The American Samoa Territorial Status and its Federal Relationship directly determine which federal revenue statutes apply.

The tuna processing industry, historically anchored by two major canneries in Pago Pago, served as the primary driver behind federal tax incentives targeting the territory. At peak operation, the canneries employed approximately 5,000 workers and represented the dominant private-sector employer. Tax credits structured under Section 936 and its successors were explicitly tied to maintaining that employment base and stabilizing the territorial economy.

Local revenue sufficiency also drives the structure. Because American Samoa does not participate in federal Medicaid at standard match rates — receiving a fixed annual Medicaid ceiling rather than an open-ended match — and because American Samoa Federal Funding and Grants do not fully substitute for locally generated revenue, the territorial tax system bears significant responsibility for funding public services.

Classification boundaries

The American Samoa tax system draws classification lines that differ from standard U.S. tax classification in four key dimensions:

Residency classification: A "bona fide resident" of American Samoa, as defined under IRC § 937, satisfies a presence test (generally 183 days in a taxable year) and an absence-of-tax-avoidance test. Bona fide residents file with the American Samoa Tax Office and report worldwide income to the territory rather than to the IRS. Non-residents with American Samoa source income face withholding obligations.

Source rules: Income is classified as "American Samoa source" or "non-American Samoa source" under regulations paralleling IRC § 861–865. The distinction determines which taxing authority has primary jurisdiction.

Entity classification: Corporations incorporated in American Samoa, S-corporations, partnerships, and sole proprietorships each face different BPT and income tax treatment under ASCA Title 11. Foreign corporations with nexus in American Samoa must register and comply separately from domestically incorporated entities.

Federal vs. territorial jurisdiction line: Wages paid by the U.S. federal government to federal employees stationed in American Samoa are subject to federal (not territorial) income tax withholding, creating a bifurcated payroll tax environment for mixed federal-territorial workplaces.

The full scope of government employment categories and their tax treatment intersects with classifications described at American Samoa Government Employment.

Tradeoffs and tensions

The mirror tax system creates structural tensions that have generated ongoing policy debate at both the territorial and congressional levels.

Revenue adequacy vs. investor incentive: The BPT gross-revenue base provides a stable, predictable revenue stream but imposes costs on businesses regardless of profitability. Startup enterprises and thin-margin importers bear a proportionally higher burden than profitable, capital-intensive operations, distorting the investment environment.

Federal credit dependency vs. local autonomy: The periodic nature of congressional reauthorization for the Section 119 credit (successor to Section 936) creates multi-year uncertainty for employers dependent on those incentives. Each reauthorization cycle requires lobbying through the American Samoa Delegate to Congress, who holds non-voting status, limiting the territory's legislative leverage.

Population outmigration and base erosion: American Samoa's population, estimated at approximately 55,000 by the U.S. Census Bureau, has experienced net outmigration to Hawaii and the continental United States. As the taxable resident base contracts, per-capita tax burden on remaining residents increases unless expenditures contract proportionally or federal transfers expand.

Nationality without citizenship: Because American Samoa residents are U.S. nationals but not automatically U.S. citizens (per American Samoa Nationality and Citizenship Law), the political pathway for federal tax reform that benefits the territory runs through a non-voting delegate — structurally limiting formal influence over the IRC provisions that the mirror system tracks.

Common misconceptions

Misconception: American Samoa residents pay no U.S. federal taxes.
Correction: Bona fide residents of American Samoa file income taxes with the territorial government under a mirror code that tracks federal rates. They do not file a separate federal return for American Samoa source income, but federal law still defines their obligations through the IRC framework. Residents with income from U.S. sources outside the territory face IRS filing requirements.

Misconception: The Section 936 credit still operates as originally enacted.
Correction: IRC § 936 was phased out between 1996 and 2006 for all territories. American Samoa's successor credit under Section 119 of Pub. L. 109-432 is a distinct, narrower provision subject to periodic reauthorization — not a continuation of the original § 936 regime.

Misconception: American Samoa corporations are automatically treated as foreign corporations for U.S. tax purposes.
Correction: Under IRC § 937 and associated regulations, American Samoa is treated as a possession of the United States. Corporations incorporated there are not classified as foreign corporations; they are subject to possession-specific rules under Subpart D of the IRC.

Misconception: The territorial tax system is governed entirely by local law with no federal oversight.
Correction: The mirror system is structurally tied to the IRC. When Congress amends the federal rate schedule, deduction rules, or entity classifications, those changes propagate into American Samoa's code to the extent the territory has incorporated them. The American Samoa Constitution governs the internal structure of territorial government, but federal revenue statutes set the outer framework.

Checklist or steps (non-advisory)

The following sequence reflects the standard compliance pathway for a new business entity establishing tax presence in American Samoa:

1. Determine entity type — corporation, LLC, partnership, or sole proprietorship — under ASCA Title 30 (Corporations) and Title 11 (Revenue and Taxation).
2. Register with the Department of Commerce — obtain a business license, which activates BPT registration requirements.
3. Register with the American Samoa Tax Office — file for a Taxpayer Identification Number with the territorial Treasury division.
4. Classify income sources — identify the proportion of revenues derived from American Samoa sources vs. non-territorial sources under IRC § 861–865 parallel rules.
5. Determine BPT applicability — confirm whether the entity is subject to BPT gross-revenue tax, income tax, or both, based on entity classification.
6. Establish payroll withholding — apply territorial withholding tables for employees who are bona fide residents; apply federal withholding tables for federal employees on dual payrolls.
7. File quarterly estimated payments — submit to the American Samoa Tax Office on the same quarterly schedule as federal estimated tax payments (April 15, June 15, September 15, January 15).
8. File annual territorial return — due date mirrors the federal April 15 deadline, with available extensions tracked to the territorial code.
9. Document Section 119 credit eligibility (if applicable) — maintain employment records required to substantiate possession tax credit claims under the applicable reauthorization statute.

Reference table or matrix

American Samoa Tax System: Key Structural Comparisons

Sources: IRC §§ 931–937; 48 U.S.C. § 1421i (Guam); 48 U.S.C. § 1397 (USVI); Pub. L. 109-432 (American Samoa Section 119 credit).

The American Samoa Government Authority reference index provides structured navigation to related territorial administration topics, including legislative, judicial, and executive branch functions that interact with the tax and revenue system described here.

References

• Internal Revenue Code §§ 931–937 — Possessions of the United States (Cornell Legal Information Institute / U.S. Code)
• American Samoa Revised Code, Title 11 — Revenue and Taxation (American Samoa Bar Association / ASCA)
• Pub. L. 109-432, Tax Relief and Health Care Act of 2006, Section 119 (U.S. Congress)
• Pub. L. 115-97, Tax Cuts and Jobs Act of 2017 (U.S. Congress)
• 48 U.S.C. § 1661 — Revenues and expenditures, American Samoa (U.S. House Office of the Law Revision Counsel)
• U.S. Census Bureau — American Samoa (U.S. Census Bureau, 2020 Decennial Census)
• IRS Publication 570 — Tax Guide for Individuals With Income From U.S. Possessions (Internal Revenue Service)
• Treasury Inspector General for Tax Administration — Possession Tax Credit Reviews (U.S. Department of the Treasury)