40 ILCS 5/14-131
For the purposes of this Section and Section 14-135.08, references to State contributions refer only to employer contributions and do not include employee contributions that are picked up or otherwise paid by the State or a department on behalf of the employee.
The Board shall also determine a State contribution rate for each fiscal year, expressed as a percentage of payroll, based on the total required State contribution for that fiscal year (less the amount received by the System from appropriations under Section 8.12 of the State Finance Act and Section 1 of the State Pension Funds Continuing Appropriation Act, if any, for the fiscal year ending on the June 30 immediately preceding the applicable November 15 certification deadline), the estimated payroll (including all forms of compensation) for personal services rendered by eligible employees, and the recommendations of the actuary.
For the purposes of this Section and Section 14.1 of the State Finance Act, the term "eligible employees" includes employees who participate in the System, persons who may elect to participate in the System but have not so elected, persons who are serving a qualifying period that is required for participation, and annuitants employed by a department as described in subdivision (a)(1) or (a)(2) of Section 14-111.
A change in an actuarial or investment assumption that increases or decreases the required State contribution and first applies in State fiscal year 2018 or thereafter shall be implemented in equal annual amounts over a 5-year period beginning in the State fiscal year in which the actuarial change first applies to the required State contribution.
A change in an actuarial or investment assumption that increases or decreases the required State contribution and first applied to the State contribution in fiscal year 2014, 2015, 2016, or 2017 shall be implemented:
For State fiscal years 1996 through 2005, the State contribution to the System, as a percentage of the applicable employee payroll, shall be increased in equal annual increments so that by State fiscal year 2011, the State is contributing at the rate required under this Section; except that (i) for State fiscal year 1998, for all purposes of this Code and any other law of this State, the certified percentage of the applicable employee payroll shall be 5.052% for employees earning eligible creditable service under Section 14-110 and 6.500% for all other employees, notwithstanding any contrary certification made under Section 14-135.08 before July 7, 1997 (the effective date of Public Act 90-65), and (ii) in the following specified State fiscal years, the State contribution to the System shall not be less than the following indicated percentages of the applicable employee payroll, even if the indicated percentage will produce a State contribution in excess of the amount otherwise required under this subsection and subsection (a): 9.8% in FY 1999; 10.0% in FY 2000; 10.2% in FY 2001; 10.4% in FY 2002; 10.6% in FY 2003; and 10.8% in FY 2004.
Beginning in State fiscal year 2046, the minimum State contribution for each fiscal year shall be the amount needed to maintain the total assets of the System at 90% of the total actuarial liabilities of the System.
Amounts received by the System pursuant to Section 25 of the Budget Stabilization Act or Section 8.12 of the State Finance Act in any fiscal year do not reduce and do not constitute payment of any portion of the minimum State contribution required under this Article in that fiscal year. Such amounts shall not reduce, and shall not be included in the calculation of, the required State contributions under this Article in any future year until the System has reached a funding ratio of at least 90%. A reference in this Article to the "required State contribution" or any substantially similar term does not include or apply to any amounts payable to the System under Section 25 of the Budget Stabilization Act.
Notwithstanding any other provision of this Section, the required State contribution for State fiscal year 2005 and for fiscal year 2008 and each fiscal year thereafter, as calculated under this Section and certified under Section 14-135.08, shall not exceed an amount equal to (i) the amount of the required State contribution that would have been calculated under this Section for that fiscal year if the System had not received any payments under subsection (d) of Section 7.2 of the General Obligation Bond Act, minus (ii) the portion of the State's total debt service payments for that fiscal year on the bonds issued in fiscal year 2003 for the purposes of that Section 7.2, as determined and certified by the Comptroller, that is the same as the System's portion of the total moneys distributed under subsection (d) of Section 7.2 of the General Obligation Bond Act.
As of June 30, 2008, the actuarial value of the System's assets shall be equal to the market value of the assets as of that date. In determining the actuarial value of the System's assets for fiscal years after June 30, 2008, any actuarial gains or losses from investment return incurred in a fiscal year shall be recognized in equal annual amounts over the 5-year period following that fiscal year.
40 ILCS 5/14-131