26 U.S. Code Part VI - ITEMIZED DEDUCTIONS FOR INDIVIDUALS AND CORPORATIONS

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Sec. 161. Allowance of deductions. 162. Trade or business expenses. 163. Interest. 164. Taxes. 165. Losses. 166. Bad debts. 167. Depreciation. 168. Accelerated cost recovery system. 169. Amortization of pollution control facilities. 170. Charitable, etc., contributions and gifts. 171. Amortizable bond premium. 172. Net operating loss deduction. 173. Circulation expenditures. 174. Research and experimental expenditures. 175. Soil and water conservation expenditures; endangered species recovery expenditures. 176. Payments with respect to employees of certain foreign corporations. [177. Repealed.] 178. Amortization of cost of acquiring a lease. 179. Election to expense certain depreciable business assets. 179A. Deduction for clean-fuel vehicles and certain refueling property. 179B. Deduction for capital costs incurred in complying with Environmental Protection Agency sulfur regulations. 179C. Election to expense certain refineries. 179D. Energy efficient commercial buildings deduction. 179E. Election to expense advanced mine safety equipment. 180. Expenditures by farmers for fertilizer, etc. 181. Treatment of certain qualified film and television productions. [182. Repealed.] 183. Activities not engaged in for profit. [184, 185. Repealed.] 186. Recoveries of damages for antitrust violations, etc. [187 to 189. Repealed.] 190. Expenditures to remove architectural and transportation barriers to the handicapped and elderly. 191. Amortization of certain rehabilitation expenditures for certified historic structures. [1]    Section 191 was repealed by Pub. L. 97–34without corresponding amendment of part analysis. 192. Contributions to black lung benefit trust. 193. Tertiary injectants. 194. Treatment of reforestation expenditures. 194A. Contributions to employer liability trusts. 195. Start-up expenditures. 196. Deduction for certain unused business credits. 197. Amortization of goodwill and certain other intangibles. 198. Expensing of environmental remediation costs. 198A. Expensing of Qualified Disaster Expenses. [2] 199. Income attributable to domestic production activities.
Amendments

2008—Pub. L. 110–343, div. C, title VII, § 707(b),Oct. 3, 2008, 122 Stat. 3924, added item 198A.
Pub. L. 110–234, title XV, § 15303(a)(2)(C),May 22, 2008, 122 Stat. 1501, and Pub. L. 110–246, title XV, § 15303(a)(2)(C),June 18, 2008, 122 Stat. 2263, made identical amendments, inserting “; endangered species recovery expenditures” after “conservation expenditures” in item 175. The amendment by Pub. L. 110–234was repealed by Pub. L. 110–246, § 4(a),June 18, 2008, 122 Stat. 1664.
2006—Pub. L. 109–432, div. A, title IV, § 404(b)(4),Dec. 20, 2006, 120 Stat. 2956, added item 179E.
2005—Pub. L. 109–58, title XIII, §§ 1323(b)(4), 1331 (c),Aug. 8, 2005, 119 Stat. 1015, 1024, added items 179C and 179D.
2004—Pub. L. 108–357, title I, § 102(d)(8), title II, § 244(b), title III, §§ 322(c)(5), 338 (b)(6),Oct. 22, 2004, 118 Stat. 1429, 1446, 1475, 1481, added items 179B, 181, and 199, and substituted “Treatment” for “Amortization” in item 194.
1997—Pub. L. 105–34, title IX, § 941(b),Aug. 5, 1997, 111 Stat. 885, added item 198.
1993—Pub. L. 103–66, title XIII, § 13261(f)(6),Aug. 10, 1993, 107 Stat. 539, added item 197.
1992—Pub. L. 102–486, title XIX, § 1913(a)(3)(B),Oct. 24, 1992, 106 Stat. 3019, added item 179A.
1990—Pub. L. 101–508, title XI, § 11801(b)(3),Nov. 5, 1990, 104 Stat. 1388–522, struck out item 184 “Amortization of certain railroad rolling stock” and item 188 “Amortization of certain expenditures for child care facilities”.
1986—Pub. L. 99–514, title II, §§ 201(d)(2)(B), 241 (b)(3), 242 (b)(3), title IV, § 402(b)(3), title VIII, § 803(c)(2),Oct. 22, 1986, 100 Stat. 2139, 2181, 2221, 2356, substituted “Amortization of cost of acquiring a lease” for “Depreciation or amortization of improvements made by lessee on lessor’s property” in item 178, and struck out items 177 “Trademark and trade name expenditures”, 182 “Expenditures by farmers for clearing land”, 185 “Amortization of railroad grading and tunnel bores”, and 189 “Amortization of real property construction period interest and taxes”.
1984—Pub. L. 98–369, div. A, title I, § 94(b), title IV, § 474(r)(8)(B),July 18, 1984, 98 Stat. 615, 841, reenacted item 195 without change, and substituted “business credits” for “investment credits” in item 196.
1983—Pub. L. 97–448, title III, § 305(b)(2),Jan. 12, 1983, 96 Stat. 2399, redesignated item 194 (relating to contributions to employer liability trusts) as 194A.
1982—Pub. L. 97–248, title II, § 205(a)(5)(C),Sept. 3, 1982, 96 Stat. 430, added item 196.
1981—Pub. L. 97–34, title II, §§ 201(d), 202(d)(3),Aug. 13, 1981, 95 Stat. 219, 221, added item 168 and substituted “Election to expense certain depreciable business assets” for “Additional first-year depreciation allowance for small business” in item 179.
1980—Pub. L. 96–605, title I, § 102(b),Dec. 28, 1980, 94 Stat. 3522, added item 195.
Pub. L. 96–451, title III, § 301(c)(2),Oct. 14, 1980, 94 Stat. 1991, added item 194 relating to amortization of reforestation expenditures.
Pub. L. 96–364, title II, § 209(c)(2),Sept. 26, 1980, 94 Stat. 1291, added item 194 relating to contributions to employer liability trusts.
Pub. L. 96–223, title II, § 251(a)(2)(A),Apr. 2, 1980, 94 Stat. 287, added item 193.
1978—Pub. L. 95–227, § 4(b)(2),Feb. 10, 1978, 95 Stat. 17, added item 192.
1977—Pub. L. 95–30, title IV, § 402(a)(4),May 23, 1977, 91 Stat. 155, struck out “on-the-job training and” after “certain expenditures for” in item 188.
1976—Pub. L. 94–455, title II, § 201(b), title XIX, §§ 1901(b)(11)(B), 1951(c)(2)(D), title XXI, §§ 2122(b)(1), 2124(a)(3)(A),Oct. 4, 1976, 90 Stat. 1527, 1795, 1841, 1915, 1917, struck out item 168 “Amortization of emergency facilities” and item 187 “Amortization of certain coal mine safety equipment” and added items 189, 190, and 191.
1971—Pub. L. 92–178, title III, § 303(c)(6),Dec. 10, 1971, 85 Stat. 522, added item 188.
1969—Pub. L. 91–172, title II, § 213(c)(1), title VII, §§ 704(b)(1), 705 (b), 707 (b), title IX, § 904(b),Dec. 30, 1969, 83 Stat. 572, 669, 674, 675, 712, substituted reference to pollution control facilities for reference to grain storage facilities in item 169, and added items 183 to 187.
1964—Pub. L. 88–272, title II, § 203(a)(3)(D). Feb. 26, 1964, 78 Stat. 34, struck out item 181 “Deduction for certain unused investment credit”.
1962—Pub. L. 87–834, §§ 2(g)(3), 21 (c),Oct. 16, 1962, 76 Stat. 973, 1064, added items 181, 182.
1960—Pub. L. 86–779, § 6(b),Sept. 14, 1960, 74 Stat. 1001, added item 180.
1958—Pub. L. 85–866, title I, § 15(b), title II, § 204(b),Sept. 2, 1958, 72 Stat. 1613, 1680, added items 178 and 179.
1956—Act June 29, 1956, ch. 464, § 4(b),70 Stat. 406, added item 177.
1954—Act Sept. 1, 1954, ch. 1206, title II, § 210(b),68 Stat. 1097, added item 176.


Footnotes
[1]  Section 191 was repealed by Pub. L. 97–34without corresponding amendment of part analysis.

[2]  So in original. The words “Qualified Disaster Expenses” probably should not be capitalized.

The table below lists the classification updates, since Jan. 3, 2012, for the contained sections. If there are multiple sections, they are presented in section number order (original document order).

The most recent Classification Table update that we have noticed was Tuesday, August 13, 2013

An empty table indicates that we see no relevant changes listed in the classification tables. If you suspect that our system may be missing something, please double-check with the Office of the Law Revision Counsel.

26 USCDescription of ChangeSession YearPublic LawStatutes at Large
§ 1632012112-240 [Sec.] 204(a), (b)126 Stat. 2323
§ 163nt new2012112-240 [Sec.] 204(c)126 Stat. 2323
§ 1642012112-240 [Sec.] 205(a)126 Stat. 2323
§ 164nt new2012112-240 [Sec.] 205(b)126 Stat. 2323
§ 1682012112-240 [Sec.] 410(b)(1), (2)126 Stat. 2342, 2343
§ 1682012112-240 [Sec.] 331(c)-(e)(3)126 Stat. 2336, 2337
§ 168nt new2012112-240 [Sec.] 410(b)(3)126 Stat. 2343
§ 1682012112-240 [Sec.] 410(a)(1)126 Stat. 2342
§ 168nt new2012112-240 [Sec.] 410(a)(2)126 Stat. 2342
§ 168nt new2012112-240 [Sec.] 331(f)126 Stat. 2337
§ 1682012112-240 [Sec.] 331(a)126 Stat. 2335
§ 1682012112-240 [Sec.] 311(a)126 Stat. 2330
§ 1682012112-240 [Sec.] 312(a)126 Stat. 2330
§ 1682012112-240 [Sec.] 313(a)126 Stat. 2330
§ 168nt new2012112-240 [Sec.] 311(b)126 Stat. 2330
§ 168nt new2012112-240 [Sec.] 312(b)126 Stat. 2330
§ 168nt new2012112-240 [Sec.] 313(b)126 Stat. 2330
§ 1702012112-240 [Sec.] 314(a)126 Stat. 2330
§ 170nt new2012112-240 [Sec.] 314(b)126 Stat. 2330
§ 1702012112-240 [Sec.] 206(a), (b)126 Stat. 2324
§ 170nt new2012112-240 [Sec.] 206(c)126 Stat. 2324
§ 1792012112-240 [Sec.] 315(a)-(d)126 Stat. 2330, 2331
§ 179nt new2012112-240 [Sec.] 315(e)126 Stat. 2331
§ 179E2012112-240 [Sec.] 316(a)126 Stat. 2331
§ 179Ent new2012112-240 [Sec.] 316(b)126 Stat. 2331
§ 1812012112-240 [Sec.] 317(a)126 Stat. 2331
§ 181nt new2012112-240 [Sec.] 317(b)126 Stat. 2331
§ 1992012112-240 [Sec.] 318(a)126 Stat. 2331
§ 199nt new2012112-240 [Sec.] 318(b)126 Stat. 2331

 

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