| Taxation in the United States |
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The Internal Revenue Code (or IRC; more formally, the Internal Revenue Code of 1986, as amended) is the main body of domestic statutory tax law of the United States organized topically, including laws covering the income tax (see Income tax in the United States), payroll taxes, gift taxes, estate taxes and statutory excise taxes. The Internal Revenue Code is published as Title 26 of the United States Code (USC), and is also known as the internal revenue title. Its implementing agency is the Internal Revenue Service.
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Prior to 1874, U.S. statutes (whether in tax law or other subjects) were not codified. That is, they were not set forth in one comprehensive subject matter title, but were instead contained in the various acts passed by Congress. Codifications of statutes, including tax statutes, undertaken in 1873 resulted in the Revised Statutes of the United States, approved June 22, 1874, effective for the laws in force as of December 1, 1873. Title 35 of the Revised Statutes was the internal revenue title. Another codification was undertaken in 1878.
In 1919, a committee of the U.S. House of Representatives began a project to recodify U.S. statutes which eventually resulted in a new United States Code in 1926 (including tax statutes).
The tax statutes were re-codified by an Act of Congress on February 10, 1939 as the "Internal Revenue Code" (later known as the "Internal Revenue Code of 1939"). The 1939 Code was published as volume 53, Part I, of the United States Statutes at Large and as title 26 of the United States Code. Subsequent permanent tax laws enacted by the United States Congress updated and amended the 1939 Code.
On August 16, 1954, in connection with a general overhaul of the Internal Revenue Service, the IRC was greatly reorganized by Congress and expanded. Ward M. Hussey was the principal drafter of the Internal Revenue Code of 1954. The code was published in volume 68A of the United States Statutes at Large. To prevent confusion with the 1939 Code, the new version was thereafter referred to as the Internal Revenue Code of 1954 and the prior version as the Internal Revenue Code of 1939. The lettering and numbering of subtitles, sections, etc., was completely changed. For example, section 22 of the 1939 Code (defining gross income) was roughly analogous to section 61 of the 1954 Code. The 1954 Code replaced the 1939 Code as title 26 of the United States Code.
Section 2 of the Tax Reform Act of 1986 provides (in part):
In effect, the 1954 Code was renamed the Internal Revenue Code of 1986 by section 2 of the Tax Reform Act of 1986. The 1986 Act contained substantial amendments, but no formal re-codification. That is, the 1986 Code retained most of the same lettering and numbering of subtitles, chapters, subchapters, parts, subparts, sections, etc. The 1986 Code, as amended from time to time (and still published as title 26 of the United States Code), retains the basic structure of the 1954 Code.
The Internal Revenue Code includes most but not all Federal tax statutes. Some tax statutes are found in other provisions of the United States Code including title 11 (related to bankruptcy) and title 28 (related to the judiciary). Further, some tax statutes are not codified at all (for example, the provisions of tax statutes that list the effective dates of Internal Revenue Code amendments).
Section 1 of the Internal Revenue Code imposes the Federal income tax on the taxable income of U.S. citizens and residents, and of estates and trusts. The corporate income tax is imposed by Internal Revenue Code section 11.
Since the IRC is a part of the USC, the organization of the IRC is identical. See United States Code#Organization.
As an example, section 162(e)(2)(B)(ii) (26 U.S.C. § 162(e)(2)(B)(ii)) would be as follows:
Title 26: Internal Revenue Code
Key Parts of IRC The Internal Revenue Code is topically organized and generally referred to by section number (sections 1 through 9834). Some topics are short (e.g., tax rates) and some quite long (e.g., pension & benefit plans). The following describes the key topics, by section number:
| Sections | Function |
|---|---|
| 1-15 | Tax rates |
| 21-54 | Credits (refundable and nonrefundable) |
| 55-59A | Alternative Minimum Tax & environmental tax |
| 61-90 | Definition of gross income (before deductions), including items specifically taxable |
| 101-140 | Specific exclusions from gross income |
| 141-149 | Private activity bonds |
| 151-153 | Personal exemptions; dependent defined |
| 161-199 | Deductions, including interest, taxes, losses, and business related items |
| 211-224 | Itemized deductions for individuals |
| 241-250 | Deductions unique to corporations |
| 261-291 | Nondeductible items, including special rules limiting or deferring deductions |
| 301-386 | Corporate transactions, including formation, distributions, reorganizations, liquidations (Subchapter C) |
| 401-436 | Pension and benefit plans: treatment of plans, employers, & beneficiaries |
| 441-483 | Accounting methods & tax years |
| 501-530 | Exempt organizations (charitable and other) |
| 531-565 | Accumulated earnings tax and personal holding companies |
| 581-597 | Banks: special rules for certain items |
| 611-638 | Natural resources provisions: depletion, etc. |
| 641-692 | Trusts & estates: definitions, income tax on same & beneficiaries |
| 701-777 | Partnerships: definitions, treatment of entities and members, special rules (Subchapter K) |
| 801-858 | Insurance companies: special rules, definitions |
| 851-860 | Regulated investment companies (mutual funds) |
| 861-865 | Source of income (for international tax) |
| 871-898 | Tax on foreign persons/corporations; inbound international rules |
| 901-908 | Foreign tax credit |
| 911-943 | Exclusions of foreign income (mostly repealed) |
| 951-965 | Taxation of U.S. shareholders of controlled foreign corporations (Subpart F) |
| 971-999 | Other international tax provisions |
| 1001-1092 | Gains: definitions, characterization, and recognition; special rules |
| 1201-1298 | Capital gains: separate taxation and special rules |
| 1301-1359 | Interperiod adjustments; certain special rules |
| 1361-1388 | S Corporations and cooperative associations: flow-through rules |
| 1391-1400T | Empowerment, enterprise, and other special zones |
| 1401-1403 | Self employment tax (like social security, below) |
| 1441-1465 | Withholding of tax on nonresidents |
| 1501-1564 | Consolidated returns and affiliated groups (corporations) |
| 2001-2210 | Estate tax on transfers at death |
| 2501-2704 | Gift tax and tax on generation skipping transfers |
| 3101-3241 | Social security and railroad retirement taxes |
| 3301-3322 | Unemployment taxes |
| 3401-3510 | Income tax withholding; payment of employment taxes |
| 4001-5000 | Excise taxes on specific goods, transactions, and industries |
| 5001-5891 | Alcohol, tobacco and firearms taxes and special excise tax rules |
| 6001-6167 | Tax returns: requirements, procedural rules, payments, settlements, extensions |
| 6201-6533 | Assessment, collection, and abatement; limitations on collection & refund |
| 6601-6751 | Interest and non-criminal penalties on underpayments or failures |
| 6801-7124 | Other procedural rules |
| 7201-7344 | Crimes, other offences, forfeitures, tax evasion |
| 7401-7493 | Judicial proceedings |
| 7501-8023 | Miscellaneous rules |
| 9001-9833 | Special taxes & funds (presidential election, highway, black lung, etc.) |
All of these examples are from Chapter 1 (Normal Taxes and Surtaxes) of Subtitle A (Income Taxes)
(key: §="section", §§="sections")
Title 26 - Internal Revenue Code
| ←←Title 25. Indians | United States
Code Title 26. Internal Revenue Code |
Title 27. Intoxicating Liquors→→ |
| See U.S. House of Representatives, and Cornell Law School. |
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