Illinois Sales Tax Rates Explained (State and Local Taxes)

State Sales Tax Rate

Illinois imposes a base state-level sales tax under the Retailers’ Occupation Tax (ROT) at a general rate of 6.25%. This rate applies to most tangible personal property sold at retail.

The state rate is composed of multiple components, including portions distributed to local governments. However, for compliance purposes, businesses should treat 6.25% as the base state rate unless a specific reduced rate applies.

Official rate information is published by the Illinois Department of Revenue.

Reduced Rates and Product-Specific Rules

Illinois does not apply a single uniform tax treatment to all retail sales. In addition to the general 6.25% state rate for general merchandise, certain categories such as qualifying drugs and medical appliances are subject to different rules. Businesses selling mixed inventories should review product classification carefully, particularly where food, medicine, and prepared items are involved.

Food for Human Consumption

Illinois distinguishes between qualifying grocery items and food taxed at the general rate. The distinction is not purely based on whether an item is edible. The tax treatment depends on how the item is classified under Illinois sales tax rules, including whether it is prepared for immediate consumption or falls into categories such as candy or soft drinks.

For current food and medicine rules, see PIO-115, Tax Rate Information for Retail Sales of Food and Medicine. For classification guidance on food items, see Illinois Department of Revenue food rate guidance.

Effective January 1, 2026, Illinois eliminated the 1% state sales and use tax on grocery sales. That change does not mean all grocery transactions are tax-free in every jurisdiction. Local grocery taxes may still apply depending on the location of the sale, so retailers should verify the current combined rate before invoicing customers.

For the 2026 grocery tax change, see FY 2026-03, Illinois Grocery Tax Changes Effective January 1, 2026.

Drugs and Medical Appliances

Qualifying drugs and medical appliances are generally taxed at a 1% state rate instead of the 6.25% general merchandise rate. Local taxes may still apply where applicable, so the effective combined rate may be higher than 1%.

Businesses should not assume that all health-related products qualify. Illinois applies a technical classification standard, and product treatment depends on whether the item falls within the statutory and administrative definition of qualifying drugs or medical appliances.

See Illinois Department of Revenue guidance on qualifying drugs and medical appliances and 86 Ill. Adm. Code 130.311 for the detailed rule.

Agricultural Products and Farm Use Purchases

Agricultural transactions in Illinois should be reviewed separately from general retail sales. Certain farm-related purchases may qualify for exemption or special treatment depending on the nature of the item, the purchaser, and the intended agricultural use. The analysis typically depends on product category and exemption documentation rather than a broad reduced-rate rule that applies to all farm items.

Where an exemption is claimed, businesses should maintain valid exemption documentation and verify that the transaction meets the applicable Illinois requirements. If the product classification is unclear, the safest approach is to confirm treatment through the Illinois Department of Revenue’s sales and use tax guidance before applying a reduced rate or exemption.

How to Verify the Correct Rate

Because Illinois combines state and local tax components, the correct rate should be verified at the transaction level. This is especially important for sellers of groceries, medicines, and mixed product catalogs.

Use the Illinois Tax Rate Database and the state’s official rate lookup tools to confirm the current combined rate for the relevant location. For a practical walkthrough, see our Illinois sales tax calculator.

 

Local or County Taxes

Illinois operates a destination-based system for most remote sellers and an origin-based system for certain in-state transactions, depending on the type of seller and tax structure.

Local jurisdictions may impose additional taxes, including:

• County Retailers’ Occupation Taxes
• Municipal Retailers’ Occupation Taxes
• Special district taxes (e.g., transit, business districts)

These local taxes are administered centrally by the state but vary significantly by location. As a result, total combined rates frequently exceed 8% and may exceed 10% in certain jurisdictions.

How Rates Are Calculated

The total sales tax rate in Illinois is the sum of:

• State ROT (6.25%)
• Applicable local ROT components
• Special district taxes (if applicable)

The applicable rate depends on:

• Location of the sale (origin vs. destination rules)
• Type of seller (in-state vs. remote)
• Product classification (general merchandise vs. qualifying items)

For remote sellers meeting economic nexus thresholds, destination-based sourcing generally applies, meaning the rate is determined by the customer’s delivery location.

How to Find the Correct Rate

Businesses must use location-specific rate lookup tools rather than relying on static tables.

The Illinois Department of Revenue provides an official rate database:

• Illinois Sales Tax Rate Lookup

This tool allows verification of current combined rates by address or ZIP code and should be used for transaction-level accuracy.

For internal calculation workflows, see the Illinois sales tax calculator.

Example Calculation

A retailer sells goods for $1,000 to a customer located in Chicago, where the combined sales tax rate is approximately 10.25%.

Calculation:

• Tax = $1,000 × 10.25% = $102.50
• Total invoice amount = $1,102.50

If the seller is required to apply destination-based sourcing (e.g., remote seller with nexus), the Chicago rate applies regardless of the seller’s physical location.

Final Notes

Illinois sales tax compliance requires careful handling of local rate variations and sourcing rules. Businesses should not rely on static rate charts, as local jurisdictions frequently update rates.

Key compliance considerations:

• Verify rates at the address level for each transaction
• Determine correct sourcing method (origin vs. destination)
• Monitor updates from the Illinois Department of Revenue

Failure to apply the correct combined rate may result in undercollection, audit exposure, and penalties.