Federal + State + FICA
Illinois Income Tax Calculator – Estimate IL State Tax
Estimate federal, state, and local income tax for any US location. Enter a ZIP code to see your state on the map and get accurate state and local tax (e.g. NYC).
Your financial details
Enter a ZIP code to highlight your state
Tax estimate
Your results will appear here after you run the calculator.
What is the Illinois Income Tax Calculator?
A specialized engine for calculating the Prairie State’s unique flat-tax obligations.
4.95% Flat Tax
Unlike federal brackets, Illinois applies a constant flat rate to all taxable income levels.
Personal Exemptions
Includes the standard Illinois exemption ($2,775 per person) which is indexed for inflation.
FICA Compliance
Calculates federal Social Security and Medicare taxes alongside your Illinois state liability.
Federal Interplay
Reconciles your Adjusted Gross Income (AGI) with Illinois-specific additions and subtractions.
Local Tax Rules
Accounts for the fact that Illinois does not permit local municipalities to levy additional income taxes.
1099 Contractor Tax
Calculates the self-employment tax obligations for Illinois freelancers and gig workers.
2024/2025 Rates
Updated with the latest Department of Revenue adjustments for the current tax filing season.
Effective Rate
Visualizes your total tax burden as a percentage of your gross Illinois salary.
Why Use Our Illinois Tax Planning Tool?
Ensuring financial predictability in a state with unique exemption rules.
Net Pay Clarity
Know exactly what your paycheck will look like after the 4.95% state tax and federal deductions.
Predictability
The flat tax makes budgeting easier; our tool shows you exactly how much to set aside for the state.
Property Tax Prep
Illinois has high property taxes; use our tool to see if your net income supports your housing costs.
Instant Estimates
Skip the manual Form IL-1040 worksheets and get an accurate tax projection in milliseconds.
Privacy Guaranteed
Your data stays on your device. We never store or track the financial information you enter.
Retirement Friendly
Illinois doesn't tax most retirement income; model your savings to see the long-term benefit.
State Comparisons
Compare your take-home pay in Illinois versus neighboring states like Indiana or Wisconsin.
Audit Your Withholding
Ensure your employer is withholding the correct flat amount to avoid a surprise bill in April.
How to Maximize Your Illinois Tax Credits?
Strategic ways to lower your liability using specific state incentives.
Bright Start 529
Deduct up to $10,000 ($20,000 for couples) in contributions to an Illinois 529 college savings plan.
Education Credit
Claim a credit for 25% of qualified K-12 education expenses that exceed $250 annually.
Property Tax Credit
Illinois allows a credit of 5% of the property tax paid on your principal residence.
IL EIC Credit
The Illinois Earned Income Credit provides a refundable credit to lower-income working families.
HSA Contributions
Reduce both your federal AGI and your Illinois taxable income by maximizing your HSA.
401(k) Pre-Tax
Contributing to a 401(k) lowers your initial AGI, which is the starting point for Illinois taxation.
Charitable Giving
While IL doesn't have a specific deduction, it lowers your federal burden if you itemize.
Professional Advice
Use our report to have an informed discussion with an Illinois-licensed tax professional.
