How much does a Hydrologic Technicians actually take home in Illinois?
5.0% flat rate — 21.2% effective total tax rateData: BLS OEWS 2024 + IRS/State Tax Brackets 2024 • Updated 2026-04-02
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Detailed line-by-line tax calculation for a Hydrologic Technicians earning $58,870 in Illinois (single filer, standard deduction).
| Tax Component | Annual Amount | Effective Rate |
|---|---|---|
| Gross Salary (Median) | $58,870 | — |
| Federal Income Tax | -$5,080 | 8.6% |
| Illinois State Income Tax | -$2,914 | 5.0% |
| Social Security (OASDI) | -$3,649 | 6.2% |
| Medicare | -$853 | 1.5% |
| Total Taxes | -$12,498 | 21.2% |
| Take-Home Pay | $46,371 | 78.8% |
Take-home pay varies significantly across experience levels. Here is the after-tax breakdown for each salary percentile of Hydrologic Technicians in Illinois.
| Percentile | Gross Salary | Total Taxes | Take-Home Pay | Tax Rate |
|---|---|---|---|---|
| 10th Percentile (P10) | $42,020 | -$8,352 | $33,667 | 19.9% |
| 25th Percentile (P25) | $51,220 | -$10,616 | $40,603 | 20.7% |
| Median (P50) | $58,870 | -$12,498 | $46,371 | 21.2% |
| 75th Percentile (P75) | $67,080 | -$15,050 | $52,029 | 22.4% |
| 90th Percentile (P90) | $91,100 | -$23,361 | $67,738 | 25.6% |
After federal income tax ($5,080), state tax ($2,914), and FICA ($4,503), a Hydrologic Technicians in Illinois takes home $46,371 per year — or $3,864 per month. The effective tax rate of 21.2% is relatively low compared to the national range.
Where does a Hydrologic Technicians keep the most of their paycheck? Top 10 states ranked by after-tax take-home pay.
Illinois ranks #10 out of 29 states for Hydrologic Technicians after-tax take-home pay.
A Hydrologic Technicians in Illinois earning a median salary of $58,870 will take home approximately $46,371 per year after federal income tax ($5,080), state income tax ($2,914), and FICA ($4,503). That is $3,864 per month or $1,783 per bi-weekly paycheck.
The effective total tax rate for a Hydrologic Technicians in Illinois is 21.2%, broken down as: federal income tax 8.6%, Illinois state tax 5.0%, and FICA (Social Security + Medicare) 7.7%. This assumes a single filer with the standard deduction for 2024.
Illinois has a 5.0% flat rate. On a Hydrologic Technicians's median salary of $58,870, the state income tax amounts to $2,914 per year, which is an effective state rate of 5.0%.
After all taxes, a Hydrologic Technicians in Illinois takes home approximately $3,864 per month, or about $22.29 per hour (based on a standard 2,080-hour work year). These figures assume a single filer, standard deduction, and no additional pre-tax deductions.
We start with the 2024 BLS median salary of $58,870 for Hydrologic Technicians in Illinois, then subtract: federal income tax using 2024 IRS brackets ($14,600 standard deduction), Illinois state income tax (5.0% flat rate), Social Security (6.2% up to $168,600), and Medicare (1.45%). The result — $46,371/yr — does not include local taxes, pre-tax deductions (401k, HSA), or tax credits.
This estimate assumes a single filer using the 2024 standard deduction ($14,600), with W-2 employment income only. It does not account for: itemized deductions, tax credits (e.g. earned income credit, child tax credit), local/city taxes, pre-tax contributions (401k, HSA, FSA), self-employment tax, or additional income sources. Actual take-home pay may differ. Consult a tax professional for personalized advice.
Our Methodology · Data Sources · Salary: BLS OEWS · Tax: IRS + State DOR