Illinois Compiled Statutes
35 ILCS 735/3-5 (2026)
Penalty for negligence
✓ current as of May 2026
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(35 ILCS 735/3-5)
(from Ch. 120, par. 2603-5)
Sec. 3-5. Penalty for negligence.
(a) If any return or amended return is prepared negligently, but without
intent to defraud, and filed, in addition to any penalty imposed under
Section 3-3 of this Act, a penalty shall be imposed in an amount equal to
20% of any resulting deficiency.
(b) Negligence includes any failure to make a reasonable attempt to
comply with the provisions of any tax Act and includes careless, reckless,
or intentional disregard of the law or regulations.
(c) No penalty shall be imposed under this Section
if it is shown that failure to comply with the tax Act is due to reasonable
cause. A taxpayer is not negligent if the taxpayer shows substantial authority
to support the return as filed.
(d) If a taxpayer has a tax liability for the taxable period ending after June 30,
1983 and prior to July 1, 2002 that is eligible for amnesty under
the Tax Delinquency Amnesty Act and the taxpayer fails to satisfy the tax
liability during the amnesty period provided for in that Act for that taxable period, then the penalty
imposed by the Department shall be imposed in an amount
that is 200% of the amount that would otherwise be imposed in accordance with
this Section.
(e) If a taxpayer has a tax liability for the taxable period ending after June 30, 2002 and prior to July 1, 2009 that is eligible for amnesty under the
Tax Delinquency Amnesty Act, except for any tax liability reported pursuant to Section 506(b) of the Illinois Income Tax Act (35 ILCS 5/506(b)) that is not final, and the taxpayer fails to satisfy the tax liability
during the amnesty period provided for in that Act for that taxable period, then the penalty imposed by
the Department under this Section shall be imposed in an amount that is 200% of
the amount that would otherwise be imposed under this Section. (Source: P.A. 96-1435, eff. 8-16-10.)
Notes of Decisions
Cited in 2
cases (1 in the last 5 years), 2009–2023 · leading case: Midwest Med. Equip. Solutions, Inc. v. Illinois Dep't of Revenue, 2023 IL App (1st) 221518-U (Ill. App. Ct. 2023).
Midwest Med. Equip. Solutions, Inc. v. Illinois Dep't of Revenue, 2023 IL App (1st) 221518-U (Ill. App. Ct. 2023). “” 35 ILCS 735/3-5(a) (West 2022). In addition, “[n]egligence includes any failure to make a reasonable attempt to comply with the provisions of any tax Act and includes careless, reckless, or intentional disregard of the law or regulations.”
Am. Airlines, Inc. v. Dep't of Revenue (Ill. App. Ct. 2009). “The circuit court agreed with American and reversed the decision of the Department, ordering the Department to issue refunds of the use tax to American in the amount of $518,059 with applicable interest as required by the Uniform Penalty and Interest Act (35 ILCS 735/3-5 (West…”
— 35 ILCS 735/3-5(a) — 1 case
Midwest Med. Equip. Solutions, Inc. v. Illinois Dep't of Revenue, 2023 IL App (1st) 221518-U (Ill. App. Ct. 2023). “” 35 ILCS 735/3-5(a) (West 2022). In addition, “[n]egligence includes any failure to make a reasonable attempt to comply with the provisions of any tax Act and includes careless, reckless, or intentional disregard of the law or regulations.”
— 35 ILCS 735/3-5(c) — 1 case
Midwest Med. Equip. Solutions, Inc. v. Illinois Dep't of Revenue, 2023 IL App (1st) 221518-U (Ill. App. Ct. 2023). “” 35 ILCS 735/3-5(a) (West 2022). In addition, “[n]egligence includes any failure to make a reasonable attempt to comply with the provisions of any tax Act and includes careless, reckless, or intentional disregard of the law or regulations.”
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