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Illinois Compiled Statutes

220 ILCS 5/9-101 (2026)

All rates or other charges made, demanded or received by any product or commodity furnished or to be furnished or for any service rendered or to be rendered shall be just and reasonable

✓ current as of May 2026
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(220 ILCS 5/9-101) (from Ch. 111 2/3, par. 9-101)
    Sec. 9-101. All rates or other charges made, demanded or received by any product or commodity furnished or to be furnished or for any service rendered or to be rendered shall be just and reasonable. Every unjust or unreasonable charge made, demanded or received for such product or commodity or service is hereby prohibited and declared unlawful. All rules and regulations made by a public utility affecting or pertaining to its charges to the public shall be just and reasonable.
(Source: P.A. 84-617.)

    
Notes of Decisions
Cited in 16 cases (5 in the last 5 years), 1996–2026 · leading case: Ill. Bell Tel. v. Ill. Comm. Com'n, 669 N.E.2d 919 (Ill. App. Ct. 1996).
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Ill. Bell Tel. v. Ill. Comm. Com'n, 669 N.E.2d 919 (Ill. App. Ct. 1996). “I); see generally 220 ILCS 5/9-101 through 9-252 (West 1994).”
People ex rel. Madigan v. Illinois Com. Comm'n, 2013 IL App (2d) 120243 (Ill. App. Ct. 2013). · cites it 2× “220 ILCS 5/9-101 (West 2010). In so doing, the Commission must also ensure that all of its rules and regulations affecting or pertaining to its rates are “just and reasonable.”
N. Illinois Gas Co. v. The Illinois Com. Comm'n, 2025 IL App (3d) 240093 (Ill. App. Ct. 2025). · cites it 2× “” 220 ILCS 5/9-101 (West 2022). Relatedly, section 9-201(c) of 24 the Act states that, “[i]f the Commission enters upon a hearing concerning the propriety of any proposed rate or other charge, *** [then] the Commission shall establish the rates or other charges *** which it…”
People v. Illinois Com. Comm'n, 2015 IL 116005 (Ill. 2015). “” 220 ILCS 5/9-101 (West 2010). A public utility may not alter its rates and charges, unless it provides notice to the Commission and the public by, inter alia, filing with the Commission a new “schedule” describing any proposed changes.”
Ameren Illinois Co. v. Illinois Com. Comm'n, 2013 IL App (4th) 121008 (Ill. App. Ct. 2014). “As a public utility, Ameren’s rates are subject to regulation by the State of Illinois pursuant to the Utilities Act (220 ILCS 5/9-101 to 22-503 (West 2012)), through which the General Assembly has delegated to the Commission the authority to review the rates suggested by public…”
Citizens Util. Bd. v. Illinois Com. Comm'n, 2018 IL App (1st) 170527 (Ill. App. Ct. 2018). “" 220 ILCS 5/9-101 (West 2016). Section 9-201(c) further states that "[i]f the Commission enters upon a hearing concerning the propriety of any proposed rate or other charge * * *, the Commission shall establish the rates or other charges * * * proposed, in whole or in part, or…”
MacLeod v. Commonwealth Edison, 2024 IL App (2d) 230237-U (Ill. App. Ct. 2024). “See 220 ILCS 5/8-101, 8-401 (West 2022) (addressing duties of public utilities); see also 220 ILCS 5/9-101 (West 2022) (rates and charges must be just and reasonable).”
Ameren Illinois Co. v. Illinois Com. Comm'n, 2013 IL App (4th) 121008 (Ill. App. Ct. 2014). “As a public utility, Ameren's rates are subject to regulation by the State of Illinois pursuant to the Utilities Act (220 ILCS 5/9-101 to 22-503 (West 2012)), through which the -2- General Assembly has delegated to the Commission the authority to review the rates suggested by…”
Citizens Util. Bd. v. Illinois Com. Comm'n, 2018 IL App (1st) 170527 (Ill. App. Ct. 2019). “” 220 ILCS 5/9-101 (West 2016). Section 9-201(c) further states that “[i]f the Commission enters upon a hearing concerning the propriety of any 6 The rider and adjustment are not the subjects of this appeal.”
N. Illinois Gas Co. v. Illinois Com. Comm'n, 2024 IL App (3d) 230388-U (Ill. App. Ct. 2024). “The Public Utilities Act and Qualified Investment Plant Costs ¶5 Under the Public Utilities Act (Act) (220 ILCS 5/9-101 et seq. (West 2022)), the Commission reviews rates proposed by public utilities to ensure that they are “just and reasonable.”
North Shore Gas Co. v. Illinois Com. Comm'n ex rel Raoul, 2026 IL App (2d) 240350-U (Ill. App. Ct. 2026). “” 220 ILCS 5/9-101, 9-201 (West 2022). In ratemaking-related proceedings, “the burden of proof to establish the justness and reasonableness of the proposed rates or other charges *** shall be upon the utility.”
People ex rel. Raoul v. Illinois Com. Comm'n, 2024 IL App (2d) 230020 (Ill. App. Ct. 2025). “” See 220 ILCS 5/9-101 (West 2022) (“All rates or other charges made, demanded or received by any product or commodity furnished or to be furnished or for any service rendered or to be rendered shall be just and reasonable.”
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