Illinois sales tax calculator
Calculate accurate Illinois sales tax in seconds with our free online tool. Simply enter your sale amount and location to get instant, precise tax calculations for any transaction in Illinois.
- Instantly calculate sales tax for any amount
- Determine the correct tax to add to your prices
- Avoid costly errors by calculating the exact amount
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Illinois sales tax rates
Understanding Illinois's sales tax structure helps you price correctly and stay compliant. Here's what you need to know:
- State Sales Tax Rate: 6.25%
- Average Local Tax Rate: 2.67%
- Maximum Local Tax Rate: 4.75%
- Average Combined Rate: 8.92%
Important note:
The combined rate ranges from 6.25% to 11% depending on your specific location, with additional district taxes possible in some areas.
How to register for sales tax in Illinois
Register online with MyTax Illinois (Form REG-1); processing usually takes 1–2 business days. Illinois Department of Revenue Registration.
Choose your registration method
The fastest option is online via MyTax Illinois; mail takes 4–6 weeks, or visit an IDOR office.
Complete form REG-1
Select "Register a New Business" and complete it before starting business in Illinois.
Receive certificate of registration
Once processed, access your Certificate of Registration through your MyTax Illinois account.
Illinois sales tax filing due dates
Stay compliant with these filing deadlines. Your specific frequency is assigned by the Illinois Department of Revenue (IDOR) based on your tax liability.
- Monthly: Due by the 20th of the following month (standard for most businesses).
- Quarterly: Due April 20, July 20, October 20, and January 20.
- Annual: Due January 20 of the following year.
- Accelerated: High-volume sellers ($20k+ monthly) have payments due on the 7th, 15th, 22nd, and last day.
Important note:
Confirm your specific schedule via MyTax Illinois. Accelerated filers follow a strict quarter-monthly payment schedule.
Simplify Illinois sales tax with Xero
Xero helps you through your entire Illinois sales tax process. It automatically applies correct tax rates to every invoice and generates compliant reports for filing. Eliminate spreadsheet errors, ensure accuracy, and spend more time focusing on growing your business instead of on tax compliance.
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FAQs about Illinois sales tax
Common exemptions include groceries, prescription medications, and certain medical equipment. Manufacturing equipment and agricultural inputs may also qualify for exemptions.
Common exemptions include groceries, prescription medications, and certain medical equipment. Manufacturing equipment and agricultural inputs may also qualify for exemptions.
Yes, if you have economic nexus in Illinois – either $100,000 in sales or 200 transactions annually to Illinois customers.
Yes, if you have economic nexus in Illinois – either $100,000 in sales or 200 transactions annually to Illinois customers.
IDOR assigns your filing frequency based on your average monthly tax liability. Check your assignment letter or log into MyTax Illinois to confirm.
IDOR assigns your filing frequency based on your average monthly tax liability. Check your assignment letter or log into MyTax Illinois to confirm.
Late filing results in penalties of 2-10% of tax due plus interest. File as soon as possible to minimize penalties and maintain good standing with IDOR.
Late filing results in penalties of 2-10% of tax due plus interest. File as soon as possible to minimize penalties and maintain good standing with IDOR.
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Disclaimer
Xero does not provide accounting, tax, business or legal advice. This calculator has been provided for information purposes only. You should consult your own professional advisors for advice directly relating to your business.