Illinois Sales Tax Calculator 2026
Work out the sales tax and total on any purchase in Illinois for the 2026 tax year.
How sales tax works in Illinois
Illinois (IL) applies a statewide base sales-tax rate of 6.25%. Most cities and counties add a local sales tax on top, so the combined rate you actually pay is usually higher than the state base — enter your local rate in the calculator above for an exact figure. Categories such as groceries, prescription drugs, and clothing are treated differently from state to state; this estimate assumes a fully taxable purchase.
What to know about Illinois sales tax
- Illinois’ constitution requires a single flat income-tax rate; a 2020 ballot measure to allow graduated rates was rejected.
- Retirement income — including pensions, 401(k) and IRA distributions, and Social Security — is generally exempt from Illinois income tax.
- Combined state-plus-local sales tax is high, especially in the Chicago area, despite the moderate 6.25% state base.
Frequently Asked Questions
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Calculate →Disclaimer
This calculator provides estimates for informational and educational purposes only. SmartTaxCalcs does not provide tax advice. Your actual tax liability may differ based on your specific situation, recent law changes, and circumstances not modeled here (e.g., AMT, NIIT, special credits). We strongly recommend consulting a qualified tax professional (CPA, Enrolled Agent, or tax attorney) before filing or making financial decisions.
Data source: IRS Revenue Procedure / state Departments of Revenue. Last data update: May 19, 2026.