Illinois Felony Sentencing Ranges & Classifications
Under the Illinois Unified Code of Corrections (730 ILCS 5/5-4.5), criminal offenses are divided into specific felony classes. Each class sets the statutory prison range, extended-term maximums, probation eligibility, and Mandatory Supervised Release (MSR) period.
Illinois Felony Sentencing Chart
| Offense Class | Standard Prison Range | Extended Term Range | Probation Eligible? | Mandatory Supervised Release (MSR) |
|---|---|---|---|---|
| First-Degree Murder (730 ILCS 5/5-4.5-20) |
20 to 60 years (+25 yrs to life if firearm discharged causing injury/death) |
60 to 100 years or Natural Life | No | 3 years |
| Class X Felony (730 ILCS 5/5-4.5-25) |
6 to 30 years | 30 to 60 years | No | 3 years (or 18 mos for certain non-violent offenses) |
| Class 1 Felony (730 ILCS 5/5-4.5-30) |
4 to 15 years | 15 to 30 years | Yes (except statutory exclusions like Criminal Sexual Assault) | 2 years (or 1 year depending on offense) |
| Class 2 Felony (730 ILCS 5/5-4.5-35) |
3 to 7 years | 7 to 14 years | Yes (unless statutorily excluded) | 2 years (or 1 year depending on offense) |
| Class 3 Felony (730 ILCS 5/5-4.5-40) |
2 to 5 years | 5 to 10 years | Yes | 1 year |
| Class 4 Felony (730 ILCS 5/5-4.5-45) |
1 to 3 years | 3 to 6 years | Yes | 1 year |
Truth-in-Sentencing: How Much Time Is Actually Served?
Under 730 ILCS 5/3-6-3, the percentage of a prison sentence a person actually serves depends on the specific offense:
- 100% of Sentence (No Good-Time Credit): First-Degree Murder, Terrorism, and certain repeat offenses.
- 85% of Sentence: Attempted First-Degree Murder, Aggravated Criminal Sexual Assault, Predatory Criminal Sexual Assault, Armed Habitual Criminal, and forcible felonies involving great bodily harm.
- 75% of Sentence: Certain aggravated firearm and felony drug trafficking offenses.
- 50% of Sentence (Day-for-Day Credit): Standard felonies not restricted by Truth-in-Sentencing earn one day of sentence credit for each day served in custody.
Mandatory Class X Sentencing by Background (730 ILCS 5/5-4.5-95)
Even when an individual is convicted of a Class 1 or Class 2 felony, Illinois law requires mandatory Class X sentencing (6 to 30 years, non-probationable) if the defendant is over 21 and has been separately convicted of two prior Class 2 or greater forcible felonies arising out of separate acts.
