Illinois Local Sales Tax Calculator

Use this calculator to determine the sales tax you need to pay on purchases made in Illinois, considering the varying local tax rates.

Data Source and Methodology

All calculations are based on data from the Avalara.

The total tax is calculated using: Tax = Purchase Amount × (Tax Rate / 100)

The total cost is: Total Cost = Purchase Amount + Tax

Purchase Amount: The initial amount of the purchase before tax.
Tax Rate: The percentage of sales tax to be applied.
Total Tax: The total amount of tax applied to the purchase.
Total Cost: The total amount to be paid including the purchase amount and tax.

Example: For a purchase of $100 with a tax rate of 8%:

The tax is $100 × (8 / 100) = $8.

The total cost is $100 + $8 = $108.

The base state sales tax rate in Illinois is 6.25%, but local taxes can increase the total to 8.25% or more.

To calculate sales tax, multiply the purchase price by the tax rate. The result is the amount of tax.