Illinois has a flat state income tax. Here’s the take-home pay for a single filer at common salary levels in 2026 (federal income tax + FICA + state tax):
| Salary | Federal | FICA | State | Take-home | Effective rate |
|---|---|---|---|---|---|
| $40,000 | $2,620 | $3,060 | $1,980 | $32,340 | 19.1% |
| $60,000 | $5,020 | $4,590 | $2,970 | $47,420 | 21.0% |
| $80,000 | $8,770 | $6,120 | $3,960 | $61,150 | 23.6% |
| $100,000 | $13,170 | $7,650 | $4,950 | $74,230 | 25.8% |
| $150,000 | $24,734 | $11,475 | $7,425 | $106,366 | 29.1% |
Enter your own salary and 401(k) contributions below.