Illinois Sales Tax Rates: 2026 County Guide
Complete sales tax breakdown for all 93 counties in Illinois. Select a county to see city-level rates and How-To guides.
Illinois Base State Tax Rate
| Jurisdiction | Rate |
|---|---|
| Illinois State Sales Tax | 6.300% |
| Total Combined Rate | 9.000% |
Illinois Sales Tax Rules, Local Rates and Nexus Notes
Data-rich guideStatewide retail transactions in Illinois are subject to base tax laws, which are further modified by local city and county jurisdictions. Understanding these statewide rules helps remote sellers and local retailers avoid audit penalties.
For local transactions, the combined rate of 9.000% consists of a 6.300% state rate. This rate matches the estimated state average combined rate of 9.000% across local jurisdictions.
In a market of 12,812,508 people, local surtaxes are closely monitored. Point-of-sale software must distinguish between city limits and unincorporated adjacent territories. Checking local tax boundary maps is highly recommended to resolve potential address validation conflicts.
Registration obligations depend on Illinois state economic nexus criteria. Shippers must evaluate their total sales within the state to verify if collection is required. Ensuring compliance involves monitoring economic nexus parameters: Remote sellers meet economic nexus rules in IL if they reach $100,000 in gross sales or 200 separate transactions within a calendar year. Always verify specific product taxability rules through official department of revenue channels. Confirm all specific taxability rules and deadlines directly with Illinois officials to prevent audit issues.
Rate data last checked in the database: March 2026
Economic Nexus Threshold
Avg Local Tax Rate
State Nexus Checker
Use current state threshold data before you register or start collecting.
Nexus estimate
State Exemption Finder
Guide buyers and sellers toward the right official exemption paperwork path.
State Product Taxability Checker
Version 1 covers the tax categories already modeled in the current database.
State-aware estimate
Verify with official sourceAll 93 Illinois Counties
Adams
Alexander
Bond
Boone
Brown
Bureau
Calhoun
Carroll
Cass
Champaign
Christian
Clark
Clay
Clinton
Coles
Cook
Crawford
Cumberland
De Witt
DeKalb
Douglas
DuPage
Edgar
Edwards
Effingham
Fayette
Ford
Franklin
Gallatin
Greene
Grundy
Hancock
Hardin
Henderson
Iroquois
Jackson
Jasper
Jefferson
Jersey
Jo Daviess
Johnson
Kane
Kankakee
Kendall
Knox
Lake
LaSalle
Lawrence
Lee
Livingston
Logan
Macoupin
Marion
Mason
Massac
McDonough
McHenry
McLean
Menard
Mercer
Monroe
Montgomery
Morgan
Moultrie
Ogle
Peoria
Perry
Piatt
Pike
Pope
Pulaski
Putnam
Randolph
Richland
Rock Island
Saline
Sangamon
Schuyler
Scott
Shelby
St. Clair
Stark
Stephenson
Tazewell
Union
Vermilion
Wabash
Washington
White
Whiteside
Will
Williamson
Woodford
Largest Cities in Illinois
These major city pages usually attract the strongest commercial intent and create more downstream tool usage.
Highest Tax Cities in Illinois
Comparison links like these help users move from broad state intent into more specific local rate pages.
Sales Tax Calculator
Using the current combined rate for Illinois.
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Effective rate:
Rounded to the nearest cent. Tax treatment of shipping and discounts can vary by state.
Sitewide Helper
Sales Tax Calculator & Compliance Helper
One compact utility block for tax calculation, reverse calculation, ZIP lookup, nexus checks, exemption guidance, and product taxability.
Advanced Sales Tax Calculator
Estimate tax with shipping, discounts, and exempt subtotal support.
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Selected location
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Taxable base:
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Effective rate:
Rounded to the nearest cent. Tax treatment of shipping and discounts can vary by state.
Reverse Sales Tax Calculator
Work backward from the total paid to estimate the pre-tax price and tax amount.
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ZIP / City Sales Tax Lookup
Search by ZIP code, city, county, or state to find current combined rates and local breakdowns.
Economic Nexus Checker
Compare your state-specific sales activity against current nexus thresholds using existing site data.
Nexus estimate
Should I Collect Sales Tax?
A fast intent-matching decision tree for businesses, marketplace sellers, and remote sellers.
Do you sell taxable goods or taxable services?
Do you sell into states outside your home state?
Have you crossed a nexus threshold in a destination state?
Do marketplaces handle most of your sales?
Do you have physical presence in the state?
Decision
Exemption Certificate Finder
Point buyers and sellers toward the right official portal and documentation checklist.
Product Taxability Checker
Version 1 uses the categories already modeled in the current database and always links back to official verification.
State-aware estimate
Verify with official source