CHICAGO–The Illinois corporate income tax rate is not 4.8% as some politicians and media writers have erroneously reported, but actually 7.3%. While the base rate is 4.8%, a constitutional amendment passed in 1980 added another 2.5%. This additional tax was named the “personal property replacement tax,” but no matter what they call it, it’s still a statewide corporate income tax.
“Senate President John Cullerton (D) is now saying that he wants to raise the state corporate income tax rate from 4.8% to 8.4%,” said Jim Tobin, President of National Taxpayers United of Illinois (NTUI). “What Cullerton fails to mention is the added 2.5% personal property replacement tax, which would actually make the state corporate tax 10.9%.”