Last updated: 2025 BLS data · Page refreshed:
How much does a Geological Technicians, Except Hydrologic Technicians actually take home in Illinois?
5.0% flat rate — 20.9% effective total tax rateData: BLS OEWS 2025 + IRS/State Tax Brackets 2024 • Updated 2026-05-19
Detailed line-by-line tax calculation for a Geological Technicians, Except Hydrologic Technicians earning $53,280 in Illinois (single filer, standard deduction).
| Tax Component | Annual Amount | Effective Rate |
|---|---|---|
| Gross Salary (Median) | $53,280 | — |
| Federal Income Tax | -$4,409 | 8.3% |
| Illinois State Income Tax | -$2,637 | 5.0% |
| Social Security (OASDI) | -$3,303 | 6.2% |
| Medicare | -$772 | 1.4% |
| Total Taxes | -$11,122 | 20.9% |
| Take-Home Pay | $42,157 | 79.1% |
Take-home pay varies significantly across experience levels. Here is the after-tax breakdown for each salary percentile of Geological Technicians, Except Hydrologic Technicians in Illinois.
| Percentile | Gross Salary | Total Taxes | Take-Home Pay | Tax Rate |
|---|---|---|---|---|
| 10th Percentile (P10) | $39,810 | -$7,809 | $32,000 | 19.6% |
| 25th Percentile (P25) | $42,950 | -$8,581 | $34,368 | 20.0% |
| Median (P50) | $53,280 | -$11,122 | $42,157 | 20.9% |
| 75th Percentile (P75) | $64,420 | -$14,130 | $50,289 | 21.9% |
| 90th Percentile (P90) | $75,230 | -$17,870 | $57,359 | 23.8% |
After federal income tax ($4,409), state tax ($2,637), and FICA ($4,075), a Geological Technicians, Except Hydrologic Technicians in Illinois takes home $42,157 per year — or $3,513 per month. The effective tax rate of 20.9% is relatively low compared to the national range.
With an effective total rate of 20.9%, a Geological Technicians, Except Hydrologic Technicians in Illinois keeps $42,157 of $53,280 gross — roughly typical for U.S. middle-income earners once federal, FICA and state taxes are combined.
Illinois applies a flat state income tax — every dollar of wage income is taxed at the same rate. For this Geological Technicians, Except Hydrologic Technicians salary that contributes $2,637 to the 5.0% effective state-tax burden.
Federal tax on this Geological Technicians, Except Hydrologic Technicians salary is $4,410 (40%), but combined state ($2,637, 24%) + FICA ($4,076, 37%) make up the other 60% of the bill.
Moving this same Geological Technicians, Except Hydrologic Technicians salary to a zero-state-tax state would yield around $44,794 net — a gain of $2,637 (6.3%) per year versus Illinois.
Illinois ranks #20 of 35 states for Geological Technicians, Except Hydrologic Technicians after-tax pay — lower half of the national distribution. Either gross wages trail the national median, state tax is elevated, or both.
Translated into paycheck cadences, $42,157 net/year works out to $3,513/month or $1,621/bi-weekly for this Geological Technicians, Except Hydrologic Technicians in Illinois — the numbers that actually hit a checking account after every deduction.
Where does a Geological Technicians, Except Hydrologic Technicians keep the most of their paycheck? Top 10 states ranked by after-tax take-home pay.
Illinois ranks #20 out of 35 states for Geological Technicians, Except Hydrologic Technicians after-tax take-home pay.
A Geological Technicians, Except Hydrologic Technicians in Illinois earning a median salary of $53,280 will take home approximately $42,157 per year after federal income tax ($4,409), state income tax ($2,637), and FICA ($4,075). That is $3,513 per month or $1,621 per bi-weekly paycheck.
The effective total tax rate for a Geological Technicians, Except Hydrologic Technicians in Illinois is 20.9%, broken down as: federal income tax 8.3%, Illinois state tax 5.0%, and FICA (Social Security + Medicare) 7.6%. This assumes a single filer with the standard deduction for 2024.
Illinois has a 5.0% flat rate. On a Geological Technicians, Except Hydrologic Technicians's median salary of $53,280, the state income tax amounts to $2,637 per year, which is an effective state rate of 5.0%.
After all taxes, a Geological Technicians, Except Hydrologic Technicians in Illinois takes home approximately $3,513 per month, or about $20.27 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 2025 BLS median salary of $53,280 for Geological Technicians, Except 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 — $42,157/yr — does not include local taxes, pre-tax deductions (401k, HSA), or tax credits.
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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