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Ohio introduced a flat tax, joining 14 other flat-tax states, another trend.—Daniel De Visé, USA Today, 6 Apr. 2026 Horner explains that the country offers a seven percent flat tax rate on all foreign retirement income, including Social Security, pensions, and IRAs, for up to 15 years.—Patricia Doherty, Travel + Leisure, 1 Apr. 2026 In fact, it wasn’t even introduced as a concept until about 100 years into the country’s history after President Abraham Lincoln signed the very first federal income tax—a 3% flat tax on incomes exceeding $800—to fund the Civil War.—Jake Angelo, Fortune, 13 Mar. 2026 In Michigan, a ballot measure endorsed by the state’s board of education called Invest in MI Kids would scrap its flat tax and include an additional 5% tax on those claiming over $500,000 (or $1 million for joint filers) in income to fund public education.—Gordon Ebanks, CNN Money, 17 Feb. 2026 See All Example Sentences for flat tax