What is the sales tax rate in Lake Forest, Illinois?

The combined sales tax rate in Lake Forest, Illinois is 8.100% as of 2026. This includes the Illinois state rate of 6.300% plus local jurisdiction taxes.

How is the Lake Forest sales tax calculated?

Multiply your purchase amount by 8.100% (or 0.00810) to get the tax owed. For example, a $100 purchase incurs $8.10 in sales tax.

What is the Illinois state sales tax rate?

The base Illinois state sales tax rate is 6.300%. Local jurisdictions may add additional taxes on top of this rate.

Does Lake Forest have a county sales tax?

Lake Forest does not levy an additional county-level sales tax beyond the state base rate.

When was the Lake Forest sales tax rate last updated?

The Lake Forest sales tax rate was last verified on March 27, 2026. We cross-reference all rates against the official State Department of Revenue data.

Live Data: April 2026

Lake Forest, IL Sales Tax Rate 2026

The combined sales tax rate in Lake Forest, Illinois is 8.100%.

Combined Rate 8.100%

State6.300% City1.000%

Lake Forest Sales Tax Breakdown

Jurisdiction	Rate
Illinois State Sales Tax	6.300%
City / Municipal Tax	1.000%
Special District Tax	0.800%
Total Combined Rate	8.100%

Which County Is Lake Forest In?

Lake Forest falls within Lake, Illinois. Lake imposes a 0.000% county-level sales tax in addition to the Illinois state base rate.

Lake Forest ZIP Codes

The following ZIP codes are mapped to Lake Forest for sales tax purposes. All listed codes apply the 8.100% combined rate.

60045

Nearby Tax Rates

Combined Rate

Combined Rate

Business Nexus in Illinois

Economic Nexus Threshold

Selling into Illinois from out of state? Once you exceed $100,000 in annual sales or 200 transactions, you must register and collect Illinois sales tax.

FAQ: Lake Forest Sales Tax

The combined sales tax rate in Lake Forest, Illinois is 8.100% as of 2026.

Multiply your purchase price by 8.100% to find the tax owed. A $500 purchase would include $40.50 in sales tax.

Groceries are generally taxable in Illinois. Check the official Department of Revenue for specific exemptions.

Vehicle purchases in Lake Forest are subject to the 8.100% combined rate, though some states apply different rules for vehicle sales. Verify with the Illinois Department of Revenue or DMV.

Register for a sales tax permit through the official Illinois Department of Revenue website. Registration is typically free and required before collecting any sales tax.

Sales Tax Calculator

Using 8.100% rate for Lake Forest, IL

Purchase Amount ($)

Tax Amount $0.00

Total with Tax $100.00

Rate applied: 8.100% combined

Official Tax Authority

Illinois Department of Revenue

Filing Deadline: Returns due the 20th of the month following the filing period. File via MyTax Illinois.

Visit Official Portal (217) 782-3336