How much does a Data Scientists actually take home in Illinois?
5.0% flat rate — 27.1% 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 Data Scientists earning $108,580 in Illinois (single filer, standard deduction).
| Tax Component | Annual Amount | Effective Rate |
|---|---|---|
| Gross Salary (Median) | $108,580 | — |
| Federal Income Tax | -$15,728 | 14.5% |
| Illinois State Income Tax | -$5,374 | 5.0% |
| Social Security (OASDI) | -$6,731 | 6.2% |
| Medicare | -$1,574 | 1.5% |
| Total Taxes | -$29,409 | 27.1% |
| Take-Home Pay | $79,170 | 72.9% |
Take-home pay varies significantly across experience levels. Here is the after-tax breakdown for each salary percentile of Data Scientists in Illinois.
| Percentile | Gross Salary | Total Taxes | Take-Home Pay | Tax Rate |
|---|---|---|---|---|
| 10th Percentile (P10) | $62,320 | -$13,403 | $48,916 | 21.5% |
| 25th Percentile (P25) | $82,000 | -$20,213 | $61,787 | 24.6% |
| Median (P50) | $108,580 | -$29,409 | $79,170 | 27.1% |
| 75th Percentile (P75) | $137,540 | -$39,878 | $97,661 | 29.0% |
| 90th Percentile (P90) | $170,570 | -$51,844 | $118,725 | 30.4% |
After federal income tax ($15,728), state tax ($5,374), and FICA ($8,306), a Data Scientists in Illinois takes home $79,170 per year — or $6,597 per month. The effective tax rate of 27.1% is moderate compared to the national range.
Where does a Data Scientists keep the most of their paycheck? Top 10 states ranked by after-tax take-home pay.
Illinois ranks #23 out of 51 states for Data Scientists after-tax take-home pay.
A Data Scientists in Illinois earning a median salary of $108,580 will take home approximately $79,170 per year after federal income tax ($15,728), state income tax ($5,374), and FICA ($8,306). That is $6,597 per month or $3,045 per bi-weekly paycheck.
The effective total tax rate for a Data Scientists in Illinois is 27.1%, broken down as: federal income tax 14.5%, 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 Data Scientists's median salary of $108,580, the state income tax amounts to $5,374 per year, which is an effective state rate of 5.0%.
After all taxes, a Data Scientists in Illinois takes home approximately $6,597 per month, or about $38.06 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 $108,580 for Data Scientists 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 — $79,170/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