REFERENCE: I.R.C. Subtitles A and C Statutory Capacities and Trigger Events
INTRODUCTION:
This table was generated with Microsoft Copilot on 8/14/26.
1. Columns:
1. Column 1: #
2. Column 2: Name
3. Column 3: Statute
4. Column 4: Classification:
a. PUB
b. PRI
c. Classification only
5. Trigger event
6. Column 5: Explanation.
2. Rows
✅ Current Table State — 76 Statutory Capacities
| Section | Rows | Badge |
|---|---|---|
| Foundational Definitions & Classifications (§7701) | 1–7 | 🔘 Classification Only (gray) |
| Subtitle A – Income Taxes (Ch. 1–6) | 8–39 | 🔵 PUB / 🟢 PRI |
| Subtitle C – Employment Taxes (Ch. 21–25) | 40–47 | 🔵 PUB / 🟢 PRI |
| Entity Elections & Special Classifications | 48-59 | 🔵 PUB / 🟢 PRI |
| Treaty-Based & International Capacities | 60-65 | 🔵 PUB / 🟢 PRI |
| Additional Penalty & Compliance Capacities | 66-71 | 🔵 PUB / 🟢 PRI |
| Enforcement & Liability Capacities | 72–76 | 🔵 PUB / 🟢 PRI |
3. Tabular List
| FOUNDATIONAL DEFINITIONS & CLASSIFICATIONS (§7701) | |||||
| 1 | Person | §7701(a)(1) | Classification Only | Being referenced anywhere in the IRC as a subject of any tax, duty, obligation, or penalty | The broadest definitional unit in the entire Code. “Person” includes an individual, a trust, an estate, a partnership, an association, a company, or a corporation. This is a pure classification — it does not itself impose tax but determines who can bear any IRC capacity. §6671(b) and §7343 do not simply “rely on” §7701(a)(1); they each define “person” independently for penalty/criminal purposes, narrowing it to those in a statutory duty‑bearing public capacity. |
| 2 | Taxpayer | §7701(a)(14) | Classification Only | Being subject to any internal revenue tax | Any person subject to any internal revenue tax. Narrower than “Person” — only those who owe or may owe a tax fall within this classification. Foundational for standing to petition the Tax Court (§7451), claim refunds (§6402), and receive statutory notices. |
| 3 | United States Person | §7701(a)(30) | Classification Only | Being a U.S. citizen or resident; a domestic partnership; a domestic corporation; a domestic estate; or a domestic trust | Defined class of persons treated as domestic for international tax purposes. A U.S. person is subject to worldwide income taxation, FBAR/FATCA reporting, and Subpart F/GILTI inclusion rules with respect to controlled foreign corporations. Classification determines which international anti-deferral regimes apply. |
| 4 | Non-United States Person | §7701(a)(31) (by exclusion); §1.1441-1(c) | Classification Only | Failing to qualify as a United States Person under §7701(a)(30) | Any person not meeting the definition of a U.S. person. Subject to withholding at source on U.S.-source income under Chapters 3 and 4 (FATCA). Classification triggers W-8 series certification requirements and Form 1042-S reporting by withholding agents. |
| 5 | Domestic (Entity) | §7701(a)(4) | Classification Only | Creation or organization under the laws of the United States or any State or Territory | Classification applied to a corporation or partnership created or organized in the United States or under U.S. or State law. A domestic corporation is subject to worldwide income tax under §11; a domestic partnership files under §701. The classification is determined at formation and cannot be changed without reorganization or termination. |
| 6 | Foreign (Entity) | §7701(a)(5) | Classification Only | Not being a domestic corporation or partnership | Classification applied to any corporation or partnership that is not domestic. Determines the applicable withholding regime (§881–882), treaty eligibility, branch profits tax exposure (§884), and FIRPTA obligations (§897). The classification arises automatically under the place-of-organization test. |
| 7 | Disregarded Entity | Reg. §301.7701-2(c); §301.7701-3 | Classification Only | Being a single-owner eligible entity that has not elected corporate classification; or being a single-member LLC with no corporate election | An eligible entity with a single owner that is disregarded as separate from its owner for all federal tax purposes. Its income, deductions, assets, and liabilities are treated as belonging directly to the owner. Cannot be a “taxpayer” in its own right (except for employment tax and certain excise tax purposes). Classification is the default for single-member LLCs and can be changed prospectively by election. |
| SUBTITLE A – INCOME TAXES (IRC Ch. 1–6) | |||||
| 8 | Individual | §1 | PRI | Filing an income tax return as a natural person | A natural person (human being) subject to graduated income tax rates under §1. The most fundamental taxpayer unit; all other individual classifications derive from this base capacity. |
| 9 | Married Individual – Filing Jointly | §1(a) | PRI | Marriage legally recognized + joint election made | Married couple who file a single combined return. Both spouses jointly and severally liable for the entire tax. Taxed at most favorable rate schedule under §1(a). |
| 10 | Married Individual – Filing Separately | §1(d) | PRI | Marriage recognized + separate return filed | Married individual who files independently of spouse. Subject to highest-bracket phase-ins; certain deductions and credits are disallowed or phased out faster. |
| 11 | Head of Household | §1(b) | PRI | Unmarried status + maintaining household for qualifying person for >6 months | Unmarried individual (or certain married persons) who pays >50% of cost of maintaining home for a qualifying child or other dependent. Taxed at intermediate rates between Single and Married Filing Jointly. |
| 12 | Surviving Spouse | §1(a) | PRI | Death of spouse + qualifying dependent child in household + within 2 tax years after year of spouse’s death | Widow or widower maintaining household for dependent child. Entitled to joint return rates for up to 2 years following year of spouse’s death, providing transition tax relief. |
| 13 | Single | §1(c) | PRI | Unmarried status on last day of tax year; no other filing status qualifies | Default filing status for unmarried individuals not qualifying as Head of Household or Surviving Spouse. Subject to the narrowest tax brackets. |
| 14 | Corporation | §11 | PUB | Organization/formation under applicable state or federal law | Any entity classified as a corporation for federal tax purposes under §7701(a)(3). Subject to the flat 21% corporate income tax rate under §11(b) (post-TCJA). Includes C corporations, insurance companies, and certain foreign entities. |
| 15 | S Corporation | §1361–1362 | PUB | Valid S election filed + eligibility requirements continuously met (≤100 shareholders, 1 class of stock, eligible shareholders) | Small business corporation that has elected pass-through treatment under Subchapter S. Income, losses, deductions, and credits flow through to shareholders’ individual returns; the entity itself generally pays no income tax. |
| 16 | S Corporation Shareholder | §1366–1368 | PRI | Holding stock in a validly-elected S corporation | Individual or qualifying trust holding stock in an S corporation. Allocated a pro-rata share of the corporation’s income, loss, deductions, and credits; must report on personal return regardless of actual distributions. |
| 17 | Partnership | §701 | PUB | Two or more persons carrying on business or financial operation for profit + agreement (written or oral) | Pass-through entity that itself pays no income tax; files informational return (Form 1065). All income, gain, loss, deduction, and credit items are allocated to partners per their partnership agreement or §704 default rules. |
| 18 | Partner | §702–703 | PRI | Holding an interest (capital or profits) in a partnership | Any person who holds an interest in a partnership, whether as a general or limited partner. Recognizes distributive share of partnership items on their own return; basis and at-risk rules govern deductibility. |
| 19 | LLC Member (Default Classification) | §301.7701-2, -3 | Classification Only | Formation of LLC under state law; no corporate election made | A member of a limited liability company that has not elected to be treated as a corporation. Single-member LLCs are disregarded entities; multi-member LLCs are treated as partnerships by default. Classification is definitional, not a taxpayer status per se. |
| 20 | Trust | §641 | PUB | Valid trust instrument created + trustee accepts + trust corpus transferred | A legal arrangement in which a trustee holds title to property for the benefit of beneficiaries. A complex trust retains income; a simple trust must distribute all current income. The trust is a separate taxable entity filing Form 1041 unless grantor trust rules apply. |
| 21 | Estate | §641 | PUB | Death of an individual + administration of decedent’s property | The taxable entity created upon the death of an individual. The estate includes all income-producing property that passes through probate. Files Form 1041 for each taxable year until the estate is fully distributed and closed. |
| 22 | Grantor | §671–679 | PRI | Retaining certain powers or interests over a trust (e.g., power to revoke, income interest, administrative powers) | Person who is treated as the owner of a trust (or portion thereof) for income tax purposes because of retained powers or interests. All trust income, deductions, and credits are reported directly on the grantor’s own return; the trust is “see-through.” |
| 23 | Beneficiary | §652; §662 | PRI | Receiving a distribution or having a distribution made available from a trust or estate | Person entitled to receive income or principal from a trust or estate. Must include in gross income amounts distributed or required to be distributed (per Distributable Net Income limitations). Retains character of trust income items per §652(b)/§662(b). |
| 24 | Fiduciary | §641; §7701(a)(6) | PUB | Appointment/acceptance as trustee, executor, administrator, or guardian | Any person who acts in a trust capacity for another — trustee, executor, administrator, or guardian. Files returns and pays taxes on behalf of the trust or estate and may be personally liable for unpaid taxes of the entity if assets are distributed before tax obligations are satisfied (§3713, §6901). |
| 25 | Nonresident Alien Individual | §871–879 | PRI | Failure to meet “green card” test or “substantial presence” test under §7701(b) | Foreign national who does not have lawful permanent resident status and does not meet the 183-day substantial presence threshold. Subject to 30% flat withholding (or treaty rate) on U.S.-source fixed/determinable/annual/periodical income and net-basis tax on income effectively connected with a U.S. trade or business. |
| 26 | Resident Alien Individual | §7701(b) | PRI | Meeting green card test OR substantial presence test (183-day formula) | Foreign national treated as a U.S. tax resident. Taxed on worldwide income identical to U.S. citizens; files Form 1040. Capacity arises automatically upon meeting either statutory test; no election required (though first-year election under §7701(b)(4) exists). |
| 27 | Dual-Status Alien | §7701(b)(2)(B) | PRI | Transitioning between resident and nonresident status within a single tax year | Individual who is both a resident alien and a nonresident alien during the same taxable year (typically the year of arrival or departure). Files a dual-status return combining two regimes: worldwide income for the resident period and U.S.-source income for the nonresident period. |
| 28 | Foreign Corporation | §881–882 | PUB | Incorporation or organization under the laws of a foreign jurisdiction | A corporation created under the laws of a country other than the United States. Subject to 30% withholding on U.S.-source FDAP income (§881) and net-basis tax on income effectively connected with U.S. business (§882). Must file Form 1120-F if engaged in U.S. trade or business. |
| 29 | Controlled Foreign Corporation (CFC) | §957 | PUB | More than 50% of total combined voting power or total value held by U.S. shareholders (each owning ≥10%) | Foreign corporation where U.S. shareholders collectively own more than 50% by vote or value. Triggers Subpart F income inclusion (§951) and GILTI (§951A) regime, causing U.S. shareholders to include CFC income currently regardless of actual distribution. |
| 30 | Passive Foreign Investment Company (PFIC) | §1297 | PUB | Foreign corporation with ≥75% passive income OR ≥50% passive assets | Foreign corporation primarily holding passive investments. U.S. shareholders face punitive interest charges on “excess distributions” and gains unless making a QEF or mark-to-market election. Designed to prevent deferral through offshore funds. |
| 31 | Regulated Investment Company (RIC) | §851–855 | PUB | Election + meeting income, asset, and distribution tests (≥90% qualifying income; ≥90% distribution; diversification requirements) | Investment company (mutual fund) that elects RIC status. Must distribute at least 90% of investment company taxable income annually. Distributions retain character to shareholders (capital gains, qualified dividends). Pays excise tax if distribution falls short of calendar-year minimum. |
| 32 | Real Estate Investment Trust (REIT) | §856–860 | PUB | Election + meeting income tests (≥75%/95% real estate income), asset tests (≥75% real estate assets), distribution test (≥90% REIT taxable income), organizational requirements | Entity organized to invest in real estate or mortgages. Distributes at least 90% of taxable income to shareholders; entity-level corporate tax applies only to retained income. Shareholders taxed on distributions at ordinary or capital gain rates. |
| 33 | Real Estate Mortgage Investment Conduit (REMIC) | §860A–860G | PUB | Election + issuance of regular and residual interests in a fixed pool of real estate mortgages | Special-purpose vehicle holding fixed pool of mortgages and issuing regular (debt-like) and residual interests. Generally not a taxable entity; income taxed only at investor level. Residual interest holders may have “phantom income” and negative tax basis issues. |
| 34 | Personal Holding Company (PHC) | §541–547 | PUB | ≥60% adjusted ordinary gross income is PHC income + more than 50% of stock owned by 5 or fewer individuals | Closely-held corporation that is primarily a conduit for passive income (dividends, rents, royalties, personal service contracts). Subject to 20% PHC penalty tax on undistributed PHC income, in addition to regular corporate income tax. |
| 35 | Accumulated Earnings | §531–537 | PUB | Accumulation of earnings beyond the reasonable needs of the business | Corporate taxpayer (typically closely held) that retains earnings beyond what is necessary for business needs, with intent to avoid shareholder-level dividend tax. Subject to 20% accumulated earnings tax on accumulated taxable income. |
| 36 | Exempt Organization | §501 | PUB | Meeting applicable organizational and operational tests + IRS recognition (or automatic qualification) | Organization that qualifies for federal income tax exemption. Categories include §501(c)(3) charities, §501(c)(4) social welfare orgs, §501(c)(6) trade associations, etc. Exempt from income tax on related income; subject to UBIT on unrelated business income (§511–514). |
| 37 | Private Foundation | §509 | PUB | 501(c)(3) status + failure to qualify as a public charity (no broad public support or qualifying public support test) | A 501(c)(3) organization that is not a publicly supported charity. Subject to excise taxes on self-dealing (§4941), failure to distribute income (§4942), excess business holdings (§4943), jeopardizing investments (§4944), and taxable expenditures (§4945). |
| 38 | Disqualified Person | §4946 | PRI | Relationship to a private foundation as substantial contributor, foundation manager, 20%+ owner of donor, or certain family members | Person who bears a defined relationship to a private foundation that makes them subject to self-dealing prohibitions under §4941. Self-dealing transactions between the foundation and a disqualified person trigger excise taxes even if the transaction is commercially reasonable. |
| 39 | Self-Employed Individual | §1401; Ch. 2 (§1401–1403) | PRI | Net earnings from self-employment exceeding $400 in the taxable year | Individual with net earnings from self-employment (trade or business income not as an employee). Subject to self-employment tax (SECA) at 15.3% on earnings up to Social Security wage base and 2.9% (plus 0.9% NIIT surtax above threshold) thereafter. May deduct half of SE tax from gross income. |
| SUBTITLE C – EMPLOYMENT TAXES (IRC Ch. 21–25) | |||||
| 40 | Employee (FICA – Chapter 21) | §3121(d); §3101 | PRI | Performing services for an employer with behavioral and financial control elements present (common-law test); or statutory employee under §3121(d)(3) | Person whose wages are subject to FICA withholding. Employee’s share of FICA: 6.2% Social Security (up to wage base) + 1.45% Medicare (+ 0.9% Additional Medicare Tax above threshold). Employer must withhold and remit. Statutory employees (e.g., certain commission drivers, traveling salespeople) are classified by statute regardless of common-law factors. |
| 41 | Employer (FICA – Chapter 21) | §3111; §3121(d)(1) | PUB | Paying wages to an employee; having the right to control the manner and means of service | Entity or person who employs workers subject to FICA. Must match employee FICA contributions dollar-for-dollar: 6.2% Social Security + 1.45% Medicare per employee. Responsible for depositing taxes via EFTPS on prescribed schedule. Failure to deposit triggers the Trust Fund Recovery Penalty (§6672). |
| 42 | Employee (RRTA – Chapter 22) | §3231(b) | PRI | Employment by a rail carrier or its subsidiary as defined under the Railroad Retirement Act | Person employed by a railroad employer subject to the Railroad Retirement Tax Act. RRTA taxes (Tier I, Tier II, and Medicare) are collected in lieu of FICA for railroad workers. Tier I mirrors FICA rates; Tier II provides supplemental railroad retirement benefits. |
| 43 | Employer (RRTA – Chapter 22) | §3231(a) | PUB | Qualifying as a rail carrier, express carrier, sleeping car company, or related entity under the RRTA | Railroad carrier or related company subject to RRTA payroll tax obligations. Must match Tier I and Tier II contributions and file Form CT-1 instead of Form 941 used by FICA employers. |
| 44 | Employer (FUTA – Chapter 23) | §3301–3311 | PUB | Paying wages of $1,500+ in any calendar quarter OR having at least one employee on any day in each of 20 weeks in current or preceding calendar year | Employer liable for Federal Unemployment Tax Act contributions. 6.0% FUTA rate on first $7,000 of each employee’s wages, reduced by up to 5.4% state unemployment tax credit, yielding effective net federal rate of 0.6%. Funds administered through the joint federal-state unemployment insurance system. |
| 45 | Employee (Income Tax Withholding – Chapter 24) | §3401(c) | PRI | Performing services as an officer, employee, or elected official; or designated by statute as an employee for withholding purposes | Person from whose wages income tax must be withheld at source. Statutory definition under §3401(c) may include persons who are independent contractors for other purposes (e.g., corporate officers). Provides a “pay-as-you-go” system aligned with actual tax liability. |
| 46 | Employer (Income Tax Withholding – Chapter 24) | §3401(d); §3402 | PUB | Controlling the payment of wages, whether or not the formal common-law employer | Person or entity who controls the payment of wages and is therefore obligated to withhold and remit income taxes. When the common-law employer does not control payment (e.g., staffing intermediary), the payor becomes the statutory employer for withholding. Responsible for accuracy of Form W-2. |
| 47 | Withholding Agent | §1441–1446; §7701(a)(16) | PUB | Having control, receipt, custody, disposal, or payment of income of a foreign person subject to withholding | Any U.S. or foreign person who has control over income paid to a foreign person subject to U.S. withholding tax. Responsible for withholding 30% (or treaty rate) on FDAP income and 10–15% on FIRPTA dispositions. Personally liable for failure to withhold even if tax could have been collected from the payee. Files Forms 1042 and 1042-S. |
| ENTITY ELECTIONS & SPECIAL CLASSIFICATIONS | |||||
| 48 | Qualified Subchapter S Subsidiary (QSub) | §1361(b)(3) | PUB | Valid S corporation election on parent + 100% ownership of subsidiary corporation + QSub election filed with IRS | A wholly-owned subsidiary of an S corporation for which a QSub election has been made. The subsidiary is disregarded as a separate entity; all of its assets, liabilities, income, and deductions are treated as belonging directly to the parent S corporation. Simplifies multi-tier S corporation structures and eliminates intercompany eliminations. Termination of the QSub election generally triggers deemed liquidation. |
| 49 | Qualified Subchapter S Trust (QSST) | §1361(d) | PRI | Trust holding S corporation stock + income beneficiary making QSST election + trust required to distribute all income currently to one individual U.S. citizen or resident beneficiary | A trust that holds S corporation stock and whose income beneficiary has elected QSST treatment, allowing the trust to qualify as an eligible S corporation shareholder. The income beneficiary is treated as the deemed owner of the S corporation stock for income tax purposes and must report S corporation pass-through income directly on their individual return. Only one current income beneficiary is permitted. |
| 50 | Electing Small Business Trust (ESBT) | §1361(e) | PRI | Trust holding S corporation stock + ESBT election filed + all potential current beneficiaries are individuals, estates, or certain charitable organizations | A trust that elects ESBT status to qualify as an S corporation shareholder. Unlike a QSST, an ESBT may have multiple current and future beneficiaries. The S portion of the trust (attributable to S corporation stock) is taxed as a separate hypothetical taxpayer at the highest individual income tax rate (37%), not passed through to beneficiaries. Charitable deductions are disallowed for the S portion. |
| 51 | Affiliated Group (Consolidated Return) | §1501; §1504 | PUB | Common parent corporation owning ≥80% of voting power AND ≥80% of total value of stock of each includible subsidiary corporation | A group of includible domestic corporations connected through ≥80% stock ownership with a single common parent that elects to file a consolidated federal income tax return. The entire group is treated as a single taxpayer; intercompany transactions are deferred or eliminated, and losses of one member can offset income of another. The election is binding for subsequent years unless revoked with IRS consent. |
| 52 | Common Parent Corporation | §1504(a)(1) | PUB | Being the top-tier includible corporation of an affiliated group that has made or is making a consolidated return election | The corporation at the apex of an affiliated group that executes the consolidated return election and acts as agent for all group members in dealings with the IRS. Bears primary filing responsibility (Form 1120) and primary liability for the group’s consolidated tax. Each subsidiary also remains jointly and severally liable for the group’s tax per Reg. §1.1502-6. |
| 53 | Partnership Electing Out of Subchapter K | §761(a) | Classification Only | All members being organizations exempt from federal income tax, or investment organizations meeting statutory requirements + IRS consent or automatic qualification + valid election filed | A partnership (or deemed partnership) that elects exclusion from all or part of Subchapter K. Each member directly reports their proportionate share of income, gain, loss, and deduction without applying partnership basis, allocation, or distribution rules. Available only to investment partnerships or tax-exempt organizations where the principal purpose is not tax avoidance and interests are fixed and determinable. Once made, the election cannot be revoked without IRS consent. |
| 54 | Qualified Opportunity Fund (QOF) | §1400Z-2(d) | PUB | Self-certification on Form 8996 + organization as a corporation or partnership + holding ≥90% of assets in qualified opportunity zone property (tested semi-annually) | An investment vehicle organized to hold qualified opportunity zone business property in designated low-income census tracts. Investors may defer recognized capital gain by investing eligible gain within 180 days. Gain invested before 2022 and held ≥10 years receives full exclusion on post-investment appreciation. A monthly penalty applies for each month the fund fails the 90% asset test. |
| 55 | U.S. Shareholder (of CFC) | §951(b) | PRI | Owning (directly, indirectly, or constructively under §958) ≥10% of total combined voting power OR ≥10% of total value of all classes of stock of a foreign corporation that is a CFC | A U.S. person owning ≥10% of a controlled foreign corporation. Must include in gross income their pro-rata share of the CFC’s Subpart F income (§951), global intangible low-taxed income (§951A/GILTI), and previously taxed earnings distributed. The expansion of the ≥10% test to include value (not just voting) was enacted by TCJA 2017. Also subject to §956 inclusions when the CFC invests in U.S. property. |
| 56 | Covered Expatriate | §877A(g)(1) | PRI | Relinquishing U.S. citizenship or terminating long-term residency (≥8 of last 15 years as a lawful permanent resident) + meeting net worth threshold (≥$2M), average annual net income tax threshold (indexed), or failure to certify 5-year tax compliance | An individual subject to the expatriation exit tax regime. Treated as having sold all worldwide assets at fair market value on the day before expatriation, recognizing gain (with a $821,000 indexed exclusion for 2024). Deferred compensation items and specified tax-deferred accounts are separately taxed. Gifts and bequests to U.S. persons are subject to a 40% tax under §2801. |
| 57 | Political Organization | §527 | PUB | Organization organized and operated primarily to influence the selection, nomination, election, or appointment of individuals to federal, state, or local public office + meeting registration requirements | A party committee, campaign committee, PAC, or similar entity qualifying under §527. Exempt from income tax on exempt function income (contributions, membership dues, political fundraising proceeds). Subject to tax at the highest corporate rate (21%) on investment income and non-exempt-function income. Must file Form 8871 (registration) and Form 8872 (periodic disclosure of contributions and expenditures). |
| 58 | Cooperative (Subchapter T) | §1381–1388 | PUB | Organization operating on a cooperative basis for the mutual benefit of its members + distributing patronage dividends based on the volume of business conducted with or for each patron | A cooperative association subject to Subchapter T. May deduct patronage dividends paid to patrons within 8.5 months of year-end, reducing entity-level taxable income. Patrons include patronage dividends in income (ordinary). Farmers’ cooperatives may also qualify for §199A deductions. Non-patronage income is fully subject to corporate income tax at 21%. Per-unit retain allocations provide an alternative to cash patronage. |
| 59 | Homeowners Association (HOA) | §528 | PUB | Qualifying as a condominium management, residential real estate management, or timeshare association + annual §528 election + ≥60% of gross income from member assessments + ≥90% of expenditures for association property management | A residential association that annually elects §528 treatment on Form 1120-H. Member assessments (exempt function income) are excluded from gross income. Non-exempt function income (e.g., interest, rental income from non-members) is taxed at a flat 30% rate (32% for timeshare associations). The annual election can be revoked and reinstated; once revoked, the association files Form 1120 as a regular corporation for that year. |
| TREATY-BASED & INTERNATIONAL CAPACITIES | |||||
| 60 | Treaty Resident | §894; Treaty Art. 4 (OECD Model) | Classification Only | Being a person subject to tax as a resident under the laws of a treaty country by reason of domicile, residence, place of management, or similar criterion, and claiming benefits under an applicable U.S. income tax treaty | A person recognized as a resident of a treaty country for purposes of a specific U.S. income tax treaty. Treaty residence may reduce or eliminate U.S. withholding on dividends, interest, and royalties; provide access to business profits, capital gains, and other treaty articles. Benefits are claimed via W-8BEN, W-8BEN-E, or Form 8833 (treaty-based return position). Limitation on benefits (LOB) or principal purpose test (PPT) provisions may restrict access. |
| 61 | Permanent Establishment | Treaty; §864(b); OECD Model Art. 5 | Classification Only | Maintaining a fixed place of business (office, factory, workshop, mine, drilling rig, etc.) or a dependent agent habitually exercising authority to conclude contracts in the source country | A treaty concept that determines whether a foreign enterprise’s business profits are taxable in the United States. If a nonresident alien or foreign corporation has a PE in the U.S., profits attributable to that PE are taxable as effectively connected income under §882. Without a PE, business profits are generally exempt from U.S. tax under applicable treaties. The PE threshold is the cornerstone of source-country business profit taxation under all U.S. income tax treaties. |
| 62 | Dual Resident Corporation | §1503(d); Reg. §1.1503(d)-1 | PUB | Being treated as a domestic corporation for U.S. tax purposes AND simultaneously treated as a tax resident of a foreign country under that country’s domestic laws | A corporation that is a tax resident of both the United States and a foreign jurisdiction concurrently. Subject to the dual consolidated loss (DCL) rules under §1503(d), which generally prohibit use of a dual resident corporation’s net operating loss against income of a domestic affiliate in a consolidated return, preventing the same loss from sheltering income in two countries. Agreements with foreign tax authorities may be required for relief. |
| 63 | Hybrid Entity | §894(c); Reg. §1.894-1(d) | Classification Only | Being an entity that is treated as fiscally transparent (pass-through) in its country of organization but as an opaque separate taxpayer (corporation) in the country of the recipient of income | An entity whose tax classification differs between jurisdictions. Under §894(c), a hybrid entity cannot claim treaty benefits on U.S.-source income on behalf of its members unless those members are themselves residents of the treaty country who would have qualified independently. Central to BEPS Action 2, OECD hybrid mismatch rules, and Pillar Two analysis. U.S. check-the-box regulations are a primary source of hybrid entities in cross-border structures. |
| 64 | Fiscally Transparent Entity | §894(c); Reg. §1.894-1(d)(3); OECD Model Commentary Art. 1 | Classification Only | Being an entity whose income is attributed directly to its owners (rather than the entity itself) for tax purposes in its country of organization | An entity — such as a partnership, LLC, S corporation, or grantor trust — through which income is derived by the owners for treaty purposes. Treaty benefits flow through to owners who are themselves treaty residents, not to the entity. Contrast with opaque entities (e.g., C corporations) that are the beneficial owner of income. The fiscally transparent analysis is done separately under U.S. law and the law of the entity’s organizing jurisdiction. |
| 65 | Foreign Disregarded Entity (FDE) | Reg. §301.7701-2(b)(8)(ii); §6038; Form 8858 | Classification Only | Being a foreign eligible entity with a single owner that has not elected corporate classification under the check-the-box regulations | A foreign entity treated as a branch or division of its single owner for U.S. federal tax purposes. The owner reports the FDE’s income, deductions, and assets directly on its own return. U.S. persons owning FDEs must file Form 8858 annually to disclose FDE activities (§6038). FDEs may be treated as separate legal entities under foreign law, creating hybrid mismatches relevant to §267A, BEAT (§59A), and GILTI computations. |
| ADDITIONAL PENALTY & COMPLIANCE CAPACITIES | |||||
| 66 | Tax Return Preparer | §7701(a)(36); §6694–6695 | PUB | Preparing, or employing one or more persons to prepare, all or substantially all of a federal tax return or refund claim for compensation | Any compensated person who prepares (or employs preparers to prepare) federal returns or refund claims. Must obtain and use a valid PTIN. Signing preparers face penalties for unreasonable positions (§6694(a), $1,000 or 50% of income from return) and willful/reckless conduct (§6694(b), $5,000 or 75% of income from return). Non-signing preparers who provide substantial preparation advice are also subject to §6694. The §6695 regime separately penalizes procedural violations (failure to sign, provide copy, retain records, include PTIN). |
| 67 | Material Advisor | §6111; §6112 | PUB | Providing material aid, assistance, or advice with respect to organizing, managing, promoting, selling, implementing, or carrying out a reportable transaction + receiving (or expecting) fees of ≥$50,000 (non-listed) or ≥$10,000 (listed transaction) from U.S. persons | A person who both provides material assistance in a reportable transaction AND receives threshold compensation. Must disclose the transaction to the IRS on Form 8918 within 60 days of becoming a material advisor (§6111) and maintain a list of all advisees available for IRS inspection (§6112). Failure to disclose incurs a $50,000 penalty (non-listed) or $200,000 (listed transaction) per §6708. Both the disclosure obligation and list maintenance obligation are independent; both can be separately violated. |
| 68 | Promoter / Organizer (Abusive Shelter) | §6700 | PUB | Organizing, assisting in organizing, or participating in the sale of an interest in any partnership, entity, plan, or arrangement + making or furnishing (or causing another to make or furnish) a gross valuation overstatement or other false or fraudulent statement regarding tax benefits | A person who promotes or sells an abusive tax shelter and makes or causes false statements about the tax consequences to investors. Subject to a civil penalty equal to the greater of $1,000 or 100% of the gross income derived from the activity (§6700(a)). The IRS may also seek a permanent injunction barring further promotion under §7408. Distinct from §6707 (failure to register a listed or reportable transaction) and §6708 (failure to maintain investor lists). |
| 69 | Aider and Abettor (Understatement) | §6701 | PUB | Aiding, assisting, procuring, or advising with respect to preparation or presentation of any portion of a return, affidavit, claim, or other document + knowing that document will be used in connection with any material tax matter + knowing it will result in an understatement of another person’s tax liability | Any person who knowingly assists in the preparation of a document that results in an understatement of another taxpayer’s liability. The penalty is $1,000 per taxpayer per tax period ($10,000 if the document relates to a corporation’s tax). Unlike §6694, §6701 applies to any person — not just paid preparers — and reaches attorneys, accountants, consultants, and corporate officers who draft supporting documents. Only one §6701 penalty may be imposed per taxpayer per period, regardless of how many aiders are involved. |
| 70 | Qualified Appraiser | §6695A; §170(f)(11)(E); Reg. §1.170A-17 | PUB | Holding a professional appraisal designation or having verifiable education and experience in valuing the type of property being appraised + not being the donor, donee, party to the transaction, or a person whose fee is contingent on the appraised value + appraisal conducted for a tax-related purpose | A person who meets IRS standards for preparing a “qualified appraisal” supporting non-cash charitable contribution deductions exceeding $5,000 (or $500,000 for certain property types) or estate and gift tax valuations. A penalty of 10% of the underpayment attributable to the appraisal (minimum $1,000; maximum 125% of the appraiser’s gross income from the appraisal) applies when a substantial or gross valuation misstatement results from the appraisal under §6695A. |
| 71 | Reportable Transaction Participant | §6011; §6707A; Reg. §1.6011-4 | PRI | Participating in a listed transaction, confidential transaction, transaction with contractual protection, loss transaction meeting threshold, or transaction of interest identified in published IRS guidance | Any person who participates in a reportable transaction must attach Form 8886 (Reportable Transaction Disclosure Statement) to their return for the year of participation and any affected year. Penalty for failure to disclose: $10,000 per transaction (individuals) or $50,000 (other persons). For listed transactions: $100,000 (individuals) or $200,000 (other persons) per §6707A. Rescission authority exists for non-listed transactions but not listed transactions. Penalty applies regardless of whether the transaction produces any tax benefit. |
| ENFORCEMENT & LIABILITY CAPACITIES | |||||
| 72 | Person (Trust Fund – §6671(b) & §7343) | §6671(b); §7343 | PUB | Holding position as officer, employee, or member of the board of directors or trustees of a corporation or other entity + being required to collect, account for, or pay over any tax | The broadest enforcement capacity in the IRC. §7343 defines “person” to include any officer or employee of a corporation, or member of a partnership, who is under a duty to collect, account for, and pay over any tax. §6671(b) cross-references §7343 for penalty chapter purposes. This capacity is not self-selected — it is assigned by law based on role and duty, regardless of title. It is the foundational capacity upon which the Trust Fund Recovery Penalty (§6672) and numerous other penalties operate. |
| 73 | Responsible Person (Trust Fund Recovery Penalty) | §6672 | PUB | Being a “person” under §6671(b)/§7343 + willful failure to collect, account for, or pay over trust fund taxes (income tax withheld + employee FICA share) | Any person required to collect, truthfully account for, and pay over payroll trust fund taxes who willfully fails to do so. Personal liability equals 100% of the unpaid trust fund taxes — the “100% penalty.” The IRS may assert this penalty against multiple responsible persons simultaneously, with joint and several liability, but may collect only once. Willfulness requires intentional, conscious disregard — not necessarily bad motive. |
| 74 | Transferee | §6901 | PRI | Receiving assets from a transferor (by gift, devise, or in any other manner) who had an existing or subsequently arising federal tax liability | Person who received assets from a tax-indebted transferor. The IRS may assess and collect the transferor’s taxes directly against the transferee to the extent of the value of assets received, without first reducing the judgment against the transferor. Based on state fraudulent transfer or successor liability law incorporated by federal reference. |
| 75 | Fiduciary (Liability – Priority of Claims) | §3713; 31 U.S.C. §3713 | PUB | Distributing assets of an estate, trust, or insolvent person when federal taxes are owed, prior to satisfying the federal tax lien | Fiduciary (executor, trustee, administrator) who pays other creditors or distributes assets before satisfying outstanding federal tax obligations when the estate is insolvent. Personally liable to the United States to the extent of the distribution made in violation of the federal priority statute. Distinct from the general fiduciary capacity under §641. |
| 76 | Nominee / Alter Ego | §6323; Common Law | PRI | Holding legal title to property as a mere conduit for the actual owner who has a federal tax liability | Person who holds title to property on behalf of another taxpayer, or whose assets are so intermingled with a taxpayer’s as to constitute an alter ego. The IRS may levy on nominee-held or alter-ego property to satisfy the real owner’s tax liability. Capacity is established through common law factors (consideration paid, dominion and control, use of property) rather than a specific IRC definition. |