Last updated: 2025 BLS data · Page refreshed:
How much does a Stationary Engineers and Boiler Operators actually take home in Illinois?
5.0% flat rate — 27.6% effective total tax rateData: BLS OEWS 2025 + IRS/State Tax Brackets 2024 • Updated 2026-05-19
Detailed line-by-line tax calculation for a Stationary Engineers and Boiler Operators earning $115,780 in Illinois (single filer, standard deduction).
| Tax Component | Annual Amount | Effective Rate |
|---|---|---|
| Gross Salary (Median) | $115,780 | — |
| Federal Income Tax | -$17,325 | 15.0% |
| Illinois State Income Tax | -$5,731 | 5.0% |
| Social Security (OASDI) | -$7,178 | 6.2% |
| Medicare | -$1,678 | 1.4% |
| Total Taxes | -$31,913 | 27.6% |
| Take-Home Pay | $83,866 | 72.4% |
Take-home pay varies significantly across experience levels. Here is the after-tax breakdown for each salary percentile of Stationary Engineers and Boiler Operators in Illinois.
| Percentile | Gross Salary | Total Taxes | Take-Home Pay | Tax Rate |
|---|---|---|---|---|
| 10th Percentile (P10) | $72,270 | -$16,846 | $55,423 | 23.3% |
| 25th Percentile (P25) | $86,750 | -$21,856 | $64,893 | 25.2% |
| Median (P50) | $115,780 | -$31,913 | $83,866 | 27.6% |
| 75th Percentile (P75) | $123,780 | -$34,841 | $88,938 | 28.1% |
| 90th Percentile (P90) | $125,260 | -$35,383 | $89,876 | 28.2% |
After federal income tax ($17,325), state tax ($5,731), and FICA ($8,857), a Stationary Engineers and Boiler Operators in Illinois takes home $83,866 per year — or $6,988 per month. The effective tax rate of 27.6% is moderate compared to the national range.
A Stationary Engineers and Boiler Operators in Illinois loses 27.6% of gross pay to taxes — higher than the ~25% national midpoint. Of the $115,780 gross, $83,866 lands in the paycheck after federal ($17,326), state ($5,731), and FICA ($8,857) withholding.
Illinois applies a flat state income tax — every dollar of wage income is taxed at the same rate. For this Stationary Engineers and Boiler Operators salary that contributes $5,731 to the 5.0% effective state-tax burden.
Federal tax on this Stationary Engineers and Boiler Operators salary is $17,326 (54%), but combined state ($5,731, 18%) + FICA ($8,857, 28%) make up the other 46% of the bill.
Moving this same Stationary Engineers and Boiler Operators salary to a zero-state-tax state would yield around $89,597 net — a gain of $5,731 (6.8%) per year versus Illinois.
For Stationary Engineers and Boiler Operators after-tax pay, Illinois ranks #2 of 51 states — top quartile. High gross wages or low state-tax burden (or both) drive the strong ranking.
Translated into paycheck cadences, $83,866 net/year works out to $6,989/month or $3,226/bi-weekly for this Stationary Engineers and Boiler Operators in Illinois — the numbers that actually hit a checking account after every deduction.
Where does a Stationary Engineers and Boiler Operators keep the most of their paycheck? Top 10 states ranked by after-tax take-home pay.
Illinois ranks #2 out of 51 states for Stationary Engineers and Boiler Operators after-tax take-home pay.
A Stationary Engineers and Boiler Operators in Illinois earning a median salary of $115,780 will take home approximately $83,866 per year after federal income tax ($17,325), state income tax ($5,731), and FICA ($8,857). That is $6,988 per month or $3,225 per bi-weekly paycheck.
The effective total tax rate for a Stationary Engineers and Boiler Operators in Illinois is 27.6%, broken down as: federal income tax 15.0%, 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 Stationary Engineers and Boiler Operators's median salary of $115,780, the state income tax amounts to $5,731 per year, which is an effective state rate of 5.0%.
After all taxes, a Stationary Engineers and Boiler Operators in Illinois takes home approximately $6,988 per month, or about $40.32 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 $115,780 for Stationary Engineers and Boiler Operators 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 — $83,866/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