Hydrologists take-home pay in Illinois
The median hydrologists in Illinois earns $83,720. After taxes that leaves about $63,583 a year, or $5,299 a month. Your effective tax rate is about 24.1%.
$63,583 take-home a year
| Gross pay | $83,720 |
| Federal income tax | −$9,588 |
| Social Security + Medicare | −$6,405 |
| Illinois income tax (approx.) | −$4,144 |
| Monthly take-home | $5,299 |
| Every two weeks | $2,445 |
Estimate for a single filer taking the standard deduction, 2026 federal rules. State tax uses an approximate effective rate; local taxes and pre-tax deductions are not included.