{"id":45,"date":"2026-03-22T21:14:18","date_gmt":"2026-03-22T21:14:18","guid":{"rendered":"https:\/\/startupdb.net\/il\/state-law\/il-corporate-income-tax\/"},"modified":"2026-03-22T21:14:18","modified_gmt":"2026-03-22T21:14:18","slug":"il-corporate-income-tax","status":"publish","type":"law_entry","link":"https:\/\/startupdb.net\/il\/state-law\/il-corporate-income-tax\/","title":{"rendered":"IL Corporate Income Tax"},"content":{"rendered":"","protected":false},"template":"","meta":{"_acf_changed":false,"footnotes":""},"topic_category":[],"us_state":[],"class_list":["post-45","law_entry","type-law_entry","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>IL Corporate Income Tax - StartupDB \u2014 Illinois<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/startupdb.net\/il\/state-law\/il-corporate-income-tax\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"IL Corporate Income Tax - StartupDB \u2014 Illinois\" \/>\n<meta property=\"og:description\" content=\"Illinois imposes a flat 9.5% total corporate income tax rate, comprising a 7% income tax and a 2.5% personal property replacement tax, on net income attributable to Illinois. 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