Business Louisiana’s corporate income tax highest in region By Deanna B. Narveson - January 27, 2023 The Baton Rouge skyline (iStock) FacebookXLinkedinEmailPrint Louisiana’s corporate income tax rate is the 15th highest in the nation, according to an analysis released this week by The Tax Foundation. Vance Ginn, chief economist at the right-leaning … Already an INSIDER? Sign in.