What Is a Take-Home Paycheck Calculator?
This calculator estimates your net (take-home) pay per paycheck in Illinois after federal income tax, Illinois state income tax, Social Security, and Medicare withholdings — plus any pre-tax deductions like 401(k) contributions or health insurance premiums.
Illinois applies a flat 4.95% state income tax rate to virtually all taxable income, regardless of how much you earn. Illinois voters rejected a switch to a graduated ('fair tax') system in 2020, so the flat-rate structure remains in place for 2026.
How to Use the Take-Home Paycheck Calculator
- Enter your annual gross salary.
- Select your pay frequency.
- Illinois's state tax rules are already built in — no need to enter a rate.
- Enter any annual pre-tax deductions.
Paycheck Deduction Formula
FICA taxes include Social Security (6.2% up to an annual wage cap) and Medicare (1.45%, with an additional 0.9% on income above certain thresholds for high earners) — this calculator applies the standard 6.2% and 1.45% rates.
Worked Example
Pre-tax deductions: $3,000/year
Taxable income for federal: $75,000 − $3,000 − $16,100 = $55,900
Federal tax (2026 brackets): approximately $7,010
Illinois state tax: $3,564 on $72,000 taxable income, using Illinois's actual 2026 rules
Social Security: $75,000 × 6.2% = $4,650
Medicare: $75,000 × 1.45% = $1,088
Estimated take-home pay per bi-weekly check: roughly $2,142
Understanding Your Results
This breaks down where your gross pay goes before you receive your net paycheck. Pre-tax deductions (like 401k contributions) reduce your taxable income, which lowers your federal tax bill — one reason they're often recommended for reducing current tax liability.
Important Limitations
- Uses 2026 federal tax brackets and Illinois's actual 2026 state income tax rules — actual withholding still depends on your specific W-4 elections and any state-specific credits or deductions not modeled here.
- Doesn't account for local/city taxes, which apply in some areas.
- Doesn't include post-tax deductions (like Roth 401k or wage garnishments).
Frequently Asked Questions
Gross pay is your total earnings before any deductions. Net (take-home) pay is what you actually receive after taxes and other deductions are withheld.
Standard FICA withholding is 6.2% for Social Security (up to an annual wage cap) and 1.45% for Medicare, for a combined 7.65% for most employees.
Contributions like traditional 401(k) retirement savings or health insurance premiums that are deducted from your pay before taxes are calculated, reducing your taxable income.
Yes — this calculator uses Illinois's actual 2026 state income tax rules (Flat 4.95% on all taxable income) rather than a flat rate you have to guess.
Actual withholding depends on your specific W-4 elections, exact state and local tax rules, benefit elections, and other factors this simplified calculator doesn't fully replicate.
Not currently. Illinois voters rejected a 2020 ballot measure that would have replaced the flat tax with graduated brackets, so the 4.95% flat rate remains in effect for 2026.