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Computer Crime Laws in Illinois

How Illinois law treats computer hacking and cybercrime: what is illegal, whether it is a misdemeanor or felony, and the penalties, from the state code.

Short answer: Computer tampering (accessing a computer, network, program or data without authorization or beyond authorization) is a Class B misdemeanor (up to 6 months); 720 ILCS 5/17-50, 5/17-51, 5/17-52; 730 ILCS 5/5-4.5-25 to -65

Computer hacking and cybercrimeComputer tampering (accessing a computer, network, program or data without authorization or beyond authorization) is a Class B misdemeanor (up to 6 months); doing so and obtaining data or services is a Class A misdemeanor (Class 4 felony for a repeat); and accessing and damaging, deleting or altering programs or data, or inserting a harmful program such as a virus, is a Class 4 felony (Class 3 for a repeat). Aggravated computer tampering that disrupts vital government or public utility services is a Class 3 felony, or a Class 2 felony if it creates a strong probability of death or great bodily harm. Computer fraud (accessing a computer to carry out a scheme to defraud) is a Class 4 felony; damaging a computer or data as part of a fraud is a Class 3 felony; and obtaining money, property or services is a Class 4 felony up to $1,000, a Class 3 felony up to $50,000, and a Class 2 felony at $50,000 or more, with property forfeiture.
Computer fraud: https://www.ilga.gov/Documents/legislation/ilcs/documents/072000050K17-50.htm ; aggravated computer tampering: https://www.ilga.gov/Documents/legislation/ilcs/documents/072000050K17-52.htm . Class 1 felony 4 to 15 years; Class 2 felony 3 to 7 years; Class 3 felony 2 to 5 years; Class 4 felony 1 to 3 years; felony fines up to $25,000; Class A misdemeanor less than 1 year and up to $2,500; Class B misdemeanor up to 6 months and $1,500; Class C misdemeanor up to 30 days and $1,500. Read on ilga.gov in the browser 2026-10-27.

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FAQ

Is hacking a crime in Illinois?
Computer tampering (accessing a computer, network, program or data without authorization or beyond authorization) is a Class B misdemeanor (up to 6 months); doing so and obtaining data or services is a Class A misdemeanor (Class 4 felony for a repeat); and accessing and damaging, deleting or altering programs or data, or inserting a harmful program such as a virus, is a Class 4 felony (Class 3 for a repeat). Aggravated computer tampering that disrupts vital government or public utility services is a Class 3 felony, or a Class 2 felony if it creates a strong probability of death or great bodily harm. Computer fraud (accessing a computer to carry out a scheme to defraud) is a Class 4 felony; damaging a computer or data as part of a fraud is a Class 3 felony; and obtaining money, property or services is a Class 4 felony up to $1,000, a Class 3 felony up to $50,000, and a Class 2 felony at $50,000 or more, with property forfeiture.
Can I get a court-appointed lawyer for computer hacking and cybercrime in Illinois?
Illinois's rule on court-appointed lawyers: Under Illinois Supreme Court Rule 401(a), an indigent defendant has the right to appointed counsel whenever the charge is punishable by imprisonment. The trial judge appoints the county Office of the Public Defender, which assigns the individual assistant public defender. Whether a person is indigent is left to the trial court's discretion based on as complete a financial picture as possible; a person need not be entirely without funds to be found indigent, and a court may not refuse appointment solely because the defendant posted bail. The Office of the State Appellate Defender handles appeals for indigent defendants. Ill. S. Ct. R. 401(a); People v. Campbell, 224 Ill. 2d 80 (2007); Burnette v. Terrell, 232 Ill. 2d 522 (2009); People v. Ellis, 309 Ill. App. 3d 443 (1999); People ex rel. Baker v. Power, 60 Ill. 2d 151 (1975)
How much does a lawyer for computer hacking and cybercrime cost in Illinois?
Lawyers set their own fees, and Illinois has rules on how they may charge. See hiring a criminal defense lawyer in Illinois for fee rules, how to check a lawyer's license and free help.
What happens after an arrest for computer hacking and cybercrime in Illinois?
How release before trial works in Illinois: Illinois abolished cash (monetary) bail under the Pretrial Fairness Act (part of the SAFE-T Act); cash bail ended in Illinois courts on September 18, 2023, after the Illinois Supreme Court upheld the law in Rowe v. Raoul, 2023 IL 129248. The default is pretrial release on personal recognizance, with conditions. The State may seek detention only in specified cases by filing a petition; at the first detention hearing the State must prove by clear and convincing evidence that the proof is evident or the presumption great that the defendant committed a detainable offense, that the defendant poses a real and present threat to any person or the community or a high likelihood of willful flight, and that no conditions could mitigate that threat or risk. The court must revisit continued detention at later hearings. 725 ILCS 5/110-6.1 (P.A. 101-652, 102-1104); Rowe v. Raoul, 2023 IL 129248 What happens after an arrest.
Can a conviction for computer hacking and cybercrime be removed from my record in Illinois?
Each state sets its own rules for sealing or expunging records. See Illinois expungement and record sealing rules.

General legal information, not legal advice. Laws change and local rules can differ; check the linked official source or talk to a lawyer about your situation.