Last updated: 2025 BLS data · Page refreshed:
How much does a Data Scientists actually take home in Illinois?
5.0% flat rate — 26.9% effective total tax rateData: BLS OEWS 2025 + IRS/State Tax Brackets 2024 • Updated 2026-05-19
Detailed line-by-line tax calculation for a Data Scientists earning $106,560 in Illinois (single filer, standard deduction).
| Tax Component | Annual Amount | Effective Rate |
|---|---|---|
| Gross Salary (Median) | $106,560 | — |
| Federal Income Tax | -$15,284 | 14.3% |
| Illinois State Income Tax | -$5,274 | 5.0% |
| Social Security (OASDI) | -$6,606 | 6.2% |
| Medicare | -$1,545 | 1.4% |
| Total Taxes | -$28,710 | 26.9% |
| Take-Home Pay | $77,849 | 73.1% |
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) | $68,810 | -$15,649 | $53,160 | 22.7% |
| 25th Percentile (P25) | $84,610 | -$21,116 | $63,493 | 25.0% |
| Median (P50) | $106,560 | -$28,710 | $77,849 | 26.9% |
| 75th Percentile (P75) | $137,290 | -$39,786 | $97,503 | 29.0% |
| 90th Percentile (P90) | $168,880 | -$51,331 | $117,548 | 30.4% |
After federal income tax ($15,284), state tax ($5,274), and FICA ($8,151), a Data Scientists in Illinois takes home $77,849 per year — or $6,487 per month. The effective tax rate of 26.9% is moderate compared to the national range.
A Data Scientists in Illinois loses 26.9% of gross pay to taxes — higher than the ~25% national midpoint. Of the $106,560 gross, $77,849 lands in the paycheck after federal ($15,284), state ($5,275), and FICA ($8,152) withholding.
Illinois applies a flat state income tax — every dollar of wage income is taxed at the same rate. For this Data Scientists salary that contributes $5,275 to the 5.0% effective state-tax burden.
Federal tax on this Data Scientists salary is $15,284 (53%), but combined state ($5,275, 18%) + FICA ($8,152, 28%) make up the other 47% of the bill.
Moving this same Data Scientists salary to a zero-state-tax state would yield around $83,124 net — a gain of $5,275 (6.8%) per year versus Illinois.
Illinois ranks #25 of 49 states for Data Scientists 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, $77,849 net/year works out to $6,487/month or $2,994/bi-weekly for this Data Scientists in Illinois — the numbers that actually hit a checking account after every deduction.
Where does a Data Scientists keep the most of their paycheck? Top 10 states ranked by after-tax take-home pay.
Illinois ranks #25 out of 49 states for Data Scientists after-tax take-home pay.
A Data Scientists in Illinois earning a median salary of $106,560 will take home approximately $77,849 per year after federal income tax ($15,284), state income tax ($5,274), and FICA ($8,151). That is $6,487 per month or $2,994 per bi-weekly paycheck.
The effective total tax rate for a Data Scientists in Illinois is 26.9%, broken down as: federal income tax 14.3%, 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 Data Scientists's median salary of $106,560, the state income tax amounts to $5,274 per year, which is an effective state rate of 5.0%.
After all taxes, a Data Scientists in Illinois takes home approximately $6,487 per month, or about $37.43 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 $106,560 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 — $77,849/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