Last updated: 2025 BLS data · Page refreshed:
How much does a Biological Technicians actually take home in Illinois?
5.0% flat rate — 21.0% effective total tax rateData: BLS OEWS 2025 + IRS/State Tax Brackets 2024 • Updated 2026-05-19
Detailed line-by-line tax calculation for a Biological Technicians earning $55,790 in Illinois (single filer, standard deduction).
| Tax Component | Annual Amount | Effective Rate |
|---|---|---|
| Gross Salary (Median) | $55,790 | — |
| Federal Income Tax | -$4,710 | 8.4% |
| Illinois State Income Tax | -$2,761 | 5.0% |
| Social Security (OASDI) | -$3,458 | 6.2% |
| Medicare | -$808 | 1.5% |
| Total Taxes | -$11,740 | 21.0% |
| Take-Home Pay | $44,049 | 79.0% |
Take-home pay varies significantly across experience levels. Here is the after-tax breakdown for each salary percentile of Biological Technicians in Illinois.
| Percentile | Gross Salary | Total Taxes | Take-Home Pay | Tax Rate |
|---|---|---|---|---|
| 10th Percentile (P10) | $36,230 | -$6,928 | $29,301 | 19.1% |
| 25th Percentile (P25) | $39,940 | -$7,841 | $32,098 | 19.6% |
| Median (P50) | $55,790 | -$11,740 | $44,049 | 21.0% |
| 75th Percentile (P75) | $70,060 | -$16,081 | $53,978 | 23.0% |
| 90th Percentile (P90) | $79,440 | -$19,327 | $60,112 | 24.3% |
After federal income tax ($4,710), state tax ($2,761), and FICA ($4,267), a Biological Technicians in Illinois takes home $44,049 per year — or $3,670 per month. The effective tax rate of 21.0% is relatively low compared to the national range.
With an effective total rate of 21.0%, a Biological Technicians in Illinois keeps $44,050 of $55,790 gross — roughly typical for U.S. middle-income earners once federal, FICA and state taxes are combined.
Illinois applies a flat state income tax — every dollar of wage income is taxed at the same rate. For this Biological Technicians salary that contributes $2,762 to the 5.0% effective state-tax burden.
Federal tax on this Biological Technicians salary is $4,711 (40%), but combined state ($2,762, 24%) + FICA ($4,268, 36%) make up the other 60% of the bill.
Moving this same Biological Technicians salary to a zero-state-tax state would yield around $46,811 net — a gain of $2,762 (6.3%) per year versus Illinois.
Illinois ranks #18 of 51 states for Biological Technicians after-tax pay — comfortably in the upper half.
Translated into paycheck cadences, $44,050 net/year works out to $3,671/month or $1,694/bi-weekly for this Biological Technicians in Illinois — the numbers that actually hit a checking account after every deduction.
Where does a Biological Technicians keep the most of their paycheck? Top 10 states ranked by after-tax take-home pay.
Illinois ranks #18 out of 51 states for Biological Technicians after-tax take-home pay.
A Biological Technicians in Illinois earning a median salary of $55,790 will take home approximately $44,049 per year after federal income tax ($4,710), state income tax ($2,761), and FICA ($4,267). That is $3,670 per month or $1,694 per bi-weekly paycheck.
The effective total tax rate for a Biological Technicians in Illinois is 21.0%, broken down as: federal income tax 8.4%, 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 Biological Technicians's median salary of $55,790, the state income tax amounts to $2,761 per year, which is an effective state rate of 5.0%.
After all taxes, a Biological Technicians in Illinois takes home approximately $3,670 per month, or about $21.18 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 $55,790 for Biological Technicians 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 — $44,049/yr — does not include local taxes, pre-tax deductions (401k, HSA), or tax credits.
Some links are affiliate links. See our disclosure.
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