Last updated: 2025 BLS data · Page refreshed:
How much does a Epidemiologists actually take home in Illinois?
5.0% flat rate — 26.7% effective total tax rateData: BLS OEWS 2025 + IRS/State Tax Brackets 2024 • Updated 2026-05-19
Detailed line-by-line tax calculation for a Epidemiologists earning $102,720 in Illinois (single filer, standard deduction).
| Tax Component | Annual Amount | Effective Rate |
|---|---|---|
| Gross Salary (Median) | $102,720 | — |
| Federal Income Tax | -$14,439 | 14.1% |
| Illinois State Income Tax | -$5,084 | 5.0% |
| Social Security (OASDI) | -$6,368 | 6.2% |
| Medicare | -$1,489 | 1.5% |
| Total Taxes | -$27,382 | 26.7% |
| Take-Home Pay | $75,337 | 73.3% |
Take-home pay varies significantly across experience levels. Here is the after-tax breakdown for each salary percentile of Epidemiologists in Illinois.
| Percentile | Gross Salary | Total Taxes | Take-Home Pay | Tax Rate |
|---|---|---|---|---|
| 10th Percentile (P10) | $65,570 | -$14,528 | $51,041 | 22.2% |
| 25th Percentile (P25) | $77,580 | -$18,683 | $58,896 | 24.1% |
| Median (P50) | $102,720 | -$27,382 | $75,337 | 26.7% |
| 75th Percentile (P75) | $106,230 | -$28,596 | $77,633 | 26.9% |
| 90th Percentile (P90) | $138,800 | -$40,339 | $98,460 | 29.1% |
After federal income tax ($14,439), state tax ($5,084), and FICA ($7,858), a Epidemiologists in Illinois takes home $75,337 per year — or $6,278 per month. The effective tax rate of 26.7% is moderate compared to the national range.
A Epidemiologists in Illinois loses 26.7% of gross pay to taxes — higher than the ~25% national midpoint. Of the $102,720 gross, $75,338 lands in the paycheck after federal ($14,439), state ($5,085), and FICA ($7,858) withholding.
Illinois applies a flat state income tax — every dollar of wage income is taxed at the same rate. For this Epidemiologists salary that contributes $5,085 to the 5.0% effective state-tax burden.
Federal tax on this Epidemiologists salary is $14,439 (53%), but combined state ($5,085, 19%) + FICA ($7,858, 29%) make up the other 47% of the bill.
Moving this same Epidemiologists salary to a zero-state-tax state would yield around $80,423 net — a gain of $5,085 (6.7%) per year versus Illinois.
For Epidemiologists after-tax pay, Illinois ranks #8 of 42 states — top quartile. High gross wages or low state-tax burden (or both) drive the strong ranking.
Translated into paycheck cadences, $75,338 net/year works out to $6,278/month or $2,898/bi-weekly for this Epidemiologists in Illinois — the numbers that actually hit a checking account after every deduction.
Where does a Epidemiologists keep the most of their paycheck? Top 10 states ranked by after-tax take-home pay.
Illinois ranks #8 out of 42 states for Epidemiologists after-tax take-home pay.
A Epidemiologists in Illinois earning a median salary of $102,720 will take home approximately $75,337 per year after federal income tax ($14,439), state income tax ($5,084), and FICA ($7,858). That is $6,278 per month or $2,897 per bi-weekly paycheck.
The effective total tax rate for a Epidemiologists in Illinois is 26.7%, broken down as: federal income tax 14.1%, 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 Epidemiologists's median salary of $102,720, the state income tax amounts to $5,084 per year, which is an effective state rate of 5.0%.
After all taxes, a Epidemiologists in Illinois takes home approximately $6,278 per month, or about $36.22 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 $102,720 for Epidemiologists 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 — $75,337/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