Illinois Code § 20-121
Illinois Code § 20-121. Reproduced from the official Illinois Compiled Statutes, with a citation summary, verification link, and related provisions.
§ 20-121.
Calculation of proportional retirement annuities. (a) Upon retirement of the employee, a proportional retirement annuity shall be computed by each participating system in which pension credit has been established on the basis of pension credits under each system. The computation shall be in accordance with the formula or method prescribed by each participating system which is in effect at the date of the employee's latest withdrawal from service covered by any of the systems in which he has pension credits which he elects to have considered under this Article. However, the amount of any retirement annuity payable under the self-managed plan established under Section 15-158.2 of this Code or under the defined contribution plan established under Article 2, 14, 15, or 16 of this Code depends solely on the value of the participant's vested account balances and is not subject to any proportional adjustment under this Section. (a-5) For persons who participate in a defined contribution plan established under Article 2, 14, 15, or 16 of this Code to whom the provisions of this Article apply, the pension credits established under the defined contribution plan may be considered in determining eligibility for or the amount of the defined benefit retirement annuity that is payable by any other participating system. (b) Combined pension credit under all retirement systems subject to this Article shall be considered in determining whether the minimum qualification has been met and the formula or method of computation which shall be applied, except as may be otherwise provided with respect to vesting in State or employer contributions in a defined contribution plan. If a system has a step-rate formula for calculation of the retirement annuity, pension credits covering previous service which have been established under another system shall be considered in determining which range or ranges of the step-rate formula are to be applicable to the employee. (c) Interest on pension credit shall continue to accumulate in accordance with the provisions of the law governing the retirement system in which the same has been established during the time an employee is in the service of another employer, on the assumption such employee, for interest purposes for pension credit, is continuing in the service covered by such retirement system. (Source: P.A. 98-599, eff. 6-1-14.) (Text of Section WITHOUT the changes made by P.A. 98-599, which has been held unconstitutional) Sec. 20-121. Calculation of proportional retirement annuities. Upon retirement of the employee, a proportional retirement annuity shall be computed by each participating system in which pension credit has been established on the basis of pension credits under each system. The computation shall be in accordance with the formula or method prescribed by each participating system which is in effect at the date of the employee's latest withdrawal from service covered by any of the systems in which he has pension credits which he elects to have considered under this Article. However, the amount of any retirement annuity payable under the self-managed plan established under Section 15-158.2 of this Code depends solely on the value of the participant's vested account balances and is not subject to any proportional adjustment under this Section. Combined pension credit under all retirement systems subject to this Article shall be considered in determining whether the minimum qualification has been met and the formula or method of computation which shall be applied. If a system has a step-rate formula for calculation of the retirement annuity, pension credits covering previous service which have been established under another system shall be considered in determining which range or ranges of the step-rate formula are to be applicable to the employee. Interest on pension credit shall continue to accumulate in accordance with the provisions of the law governing the retirement system in which the same has been established during the time an employee is in the service of another employer, on the assumption such employee, for interest purposes for pension credit, is continuing in the service covered by such retirement system. (Source: P.A. 91-887, eff. 7-6-00.)
Source: official Illinois text · Last verified 2026-08-27
At a glance
- Citation: Illinois Compiled Statutes § 20-121
- Jurisdiction: Illinois
- Code: Illinois Compiled Statutes
- Text: transcribed from the official source (verify below)
Verify the text
Statute text is transcribed from the official Illinois Compiled Statutes. Confirm it against the primary source before relying on it:
Not legal advice. Verify against the official source and consult a licensed Illinois attorney.
Common questions
What is the source of Illinois Compiled Statutes § 20-121?
The text above is transcribed from the Illinois Compiled Statutes, the codified statutes of Illinois. The official publisher link appears under "Verify the text" on this page.
What subject does Illinois Compiled Statutes § 20-121 address?
It addresses the rule set out in the section text. Read the section together with the surrounding provisions listed under "Nearby provisions" for the full picture.
Is Illinois Compiled Statutes § 20-121 still in force?
Statutes are amended, repealed, and renumbered every session. Confirm the current version at the official Illinois source before relying on this text.
Can this page be used as legal advice?
No. This is a reference transcription for research. Applying Illinois law to your facts requires a licensed Illinois attorney who can review the specifics.