Yesterday afternoon, after months of wrangling and a marathon 4th of July weekend session, the Illinois House of Representatives voted to override Governor Bruce Rauner’s veto of Senate Bill (SB) 9, the revenue bill supporting the State’s Fiscal Year (FY) 2017-2018 Budget. The vote ended Illinois’ two year budget impasse and may avoid a threatened downgrade of Illinois bonds to junk status. The key tax components of the bill as enacted Public Act 100-0022 (Act) are as follows:

Income Tax

Rate increase. Income tax rates are increased, effective July 1, 2017, to 4.95 percent for individuals, trusts and estates, and 7 percent for corporations.

Income allocation. The Act contains a number of provisions intended to resolve questions regarding how income should be allocated between the two rates in effect for 2017.

• Illinois Income Tax Act (IITA) 5/202.5(a) provides a default rule, a proration based on the days in each period (181/184), for purposes of allocating income between pre-July 1 segments and periods after the end of June when rates increase. Alternatively, IITA 5/202.5(b) provides that a taxpayer may elect to determine net income on a specific accounting basis for the two portions of their taxable year, from the beginning of the taxable year through the last day of the apportionment period, and from the first day of the next apportionment period through the end of the taxable year.

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