Last updated: 2025 BLS data · Page refreshed:
How much does a Aerospace Engineers actually take home in Illinois?
5.0% flat rate — 27.1% effective total tax rateData: BLS OEWS 2025 + IRS/State Tax Brackets 2024 • Updated 2026-05-19
Detailed line-by-line tax calculation for a Aerospace Engineers earning $108,940 in Illinois (single filer, standard deduction).
| Tax Component | Annual Amount | Effective Rate |
|---|---|---|
| Gross Salary (Median) | $108,940 | — |
| Federal Income Tax | -$15,807 | 14.5% |
| Illinois State Income Tax | -$5,392 | 5.0% |
| Social Security (OASDI) | -$6,754 | 6.2% |
| Medicare | -$1,579 | 1.5% |
| Total Taxes | -$29,534 | 27.1% |
| Take-Home Pay | $79,405 | 72.9% |
Take-home pay varies significantly across experience levels. Here is the after-tax breakdown for each salary percentile of Aerospace Engineers in Illinois.
| Percentile | Gross Salary | Total Taxes | Take-Home Pay | Tax Rate |
|---|---|---|---|---|
| 10th Percentile (P10) | $78,170 | -$18,887 | $59,282 | 24.2% |
| 25th Percentile (P25) | $98,300 | -$25,852 | $72,447 | 26.3% |
| Median (P50) | $108,940 | -$29,534 | $79,405 | 27.1% |
| 75th Percentile (P75) | $153,800 | -$45,829 | $107,970 | 29.8% |
| 90th Percentile (P90) | $184,520 | -$56,085 | $128,434 | 30.4% |
After federal income tax ($15,807), state tax ($5,392), and FICA ($8,333), a Aerospace Engineers in Illinois takes home $79,405 per year — or $6,617 per month. The effective tax rate of 27.1% is moderate compared to the national range.
A Aerospace Engineers in Illinois loses 27.1% of gross pay to taxes — higher than the ~25% national midpoint. Of the $108,940 gross, $79,406 lands in the paycheck after federal ($15,808), state ($5,393), and FICA ($8,334) withholding.
Illinois applies a flat state income tax — every dollar of wage income is taxed at the same rate. For this Aerospace Engineers salary that contributes $5,393 to the 5.0% effective state-tax burden.
Federal tax on this Aerospace Engineers salary is $15,808 (54%), but combined state ($5,393, 18%) + FICA ($8,334, 28%) make up the other 46% of the bill.
Moving this same Aerospace Engineers salary to a zero-state-tax state would yield around $84,798 net — a gain of $5,393 (6.8%) per year versus Illinois.
Illinois sits near the bottom (#37 of 41) for Aerospace Engineers after-tax earnings. Relocation, negotiation, or credential stacking typically show the clearest ROI in bottom-quartile states.
Translated into paycheck cadences, $79,406 net/year works out to $6,617/month or $3,054/bi-weekly for this Aerospace Engineers in Illinois — the numbers that actually hit a checking account after every deduction.
Where does a Aerospace Engineers keep the most of their paycheck? Top 10 states ranked by after-tax take-home pay.
Illinois ranks #37 out of 41 states for Aerospace Engineers after-tax take-home pay.
A Aerospace Engineers in Illinois earning a median salary of $108,940 will take home approximately $79,405 per year after federal income tax ($15,807), state income tax ($5,392), and FICA ($8,333). That is $6,617 per month or $3,054 per bi-weekly paycheck.
The effective total tax rate for a Aerospace Engineers in Illinois is 27.1%, broken down as: federal income tax 14.5%, 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 Aerospace Engineers's median salary of $108,940, the state income tax amounts to $5,392 per year, which is an effective state rate of 5.0%.
After all taxes, a Aerospace Engineers in Illinois takes home approximately $6,617 per month, or about $38.18 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 $108,940 for Aerospace Engineers 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 — $79,405/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