Income Tax / 16th Amendment (1913)

Class card for the US federal income-tax machine ratified under the Sixteenth Amendment to the US Constitution (ratified 3 February 1913; proclaimed 25 February 1913 by Secretary Knox) and implemented immediately by the Revenue Act of October 1913 (Underwood Tariff Act). The Amendment reads: "The Congress shall have power to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several States, and without regard to any census or enumeration." This overrode Pollock v. Farmers' Loan & Trust Co. (1895), in which the Supreme Court struck down the 1894 income tax as a direct tax requiring apportionment under Article I §2. The 16th Amendment is the constitutional foundation of the 20th-century US federal fiscal state. Without it, neither the New Deal's expansive social insurance nor the wartime spending capacity of WWI/WWII is possible. Historical trajectory. Three pillars of the 1913 fiscal-monetary settlement: (1) 16th Amendment ratified Feb 1913; (2) Underwood Tariff / Revenue Act signed Oct 1913 — implements initial rates (1% normal on income >$3,000; 6% top surtax on income >$500,000) while cutting tariffs as revenue replacement; (3) Federal Reserve Act Dec 1913. The ratification campaign took four years (Taft proposed in 1909; 42 of 48 states ratified by 1913; Wilson signs Revenue Act). WWI war- finance ratchets: Revenue Act 1916 (2%/15%), War Revenue Act 1917 (top 67%), Revenue Act 1918 (top 77% effective 1918). The 1920s Mellon cuts: Revenue Acts 1921/1924/1926/1928 reduce top rate to 25% by 1925. New Deal re-expansion: Revenue Act 1935 (top 79%), WWII Revenue Act 1942 (top 88%), Revenue Act 1944 (top 94%); simultaneously the WWII broadening of the tax base via the Current Tax Payment Act 1943 (Beardsley Ruml withholding plan) expands filers from ~4 million (1939) to ~42 million (1945) — creating mass-fiscal-citizenship for the first time. Post-WWII plateau: top rates remain 70-91% through 1963 Kennedy tax cut (top 70%); Tax Reform Act 1986 (Reagan/Rostenkowski) reduces top to 28%. Since 1986: oscillation from 39.6% (Clinton) → 35% (Bush) → 39.6% (Obama) → 37% (Trump 2017 TCJA). As of 2026, the income-tax machine is a permanent fixture of the US fiscal apparatus — 112 years of continuous operation. Key structuring features. (1) Emergency ratchet: rates acquire and largely retain peaks set under wartime emergency (WWI 77% → maintained 1920s at 25% floor → WWII 94% → post-war 70-91% floor). This is the canonical mechanism by which MM-Day fiscal capacity is acquired. (2) Mass withholding: Ruml 1943 withholding plan creates automatic fiscal-citizenship — workers pay before they receive, insulating tax compliance from volition. (3) Capital-gains differential: created via Revenue Act 1921, initiating a tax-code feature that directly shapes 20th-c. capital allocation and eventually the modern asset-management industry (BlackRock/Vanguard cross-era coupling). (4) Progressivity architecture: graduated income brackets create the structural architecture within which US income redistribution, Social Security, Medicare are nested. 16A is this card's primary machine. The IRS (Bureau of Internal Revenue, renamed 1953) is its primary operational instance; it is not a separate card but a notable_instance of this machine. Progressive-era parallel: UK Income Tax Act 1842 (Peel's income tax, British precedent — machine:british-empire-state-machine-1815 lineage) and Bismarckian revenue reforms of the 1880s (machine:bismarckian-welfare-apparatus-1883) are proximate historical antecedents but are distinct machines; US 16A is a constitutional settlement not a statutory one, giving it structural rigidity no statutory tax can match.