IL SB1577

Amends the Illinois False Claims Act to update civil penalties from a fixed range of $5,500-$11,000 to align with federal False Claims Act penalties as adjusted annually under the Federal Civil Penalties Inflation Adjustment Act of 1990.

Establishes a minimum penalty of $5,500 and maximum of $11,000 for private whistleblower actions where the State does not intervene, the tax owed is $50,000 or less, and the violation involves a tax claim administered by the Department of Revenue (excluding property tax claims).

Applies penalties and treble damages to persons who knowingly present false claims, make false records, conspire to violate the Act, deliver less than full payment of State property, falsify receipts, unlawfully purchase State property, or conceal obligations to pay the State.

Defines "knowing" to include actual knowledge, deliberate ignorance, or reckless disregard of information truthfulness, without requiring proof of specific intent to defraud.

Excludes claims, records, or statements made under the Illinois Income Tax Act from the Act's application.