General statewide reference
Free small-business tool
Illinois Sales Tax Calculator.
Choose a state to load its current statewide base rate, then add tax to a price or work backward from a tax-inclusive total.
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Tax inputs
Select a state and calculate.
RATE GUIDEChoose a state
Updated July 1, 2026State base—
Avg. local—
Avg. combined—
Select a state to load its statewide base rate. You can always enter an exact local rate below.
The rate remains editable because city, county, special-district, product, and service rules can change the amount that applies to a transaction.
Rate data: General sales-tax rates as of July 1, 2026. Local figures are population-weighted statewide averages, not the exact rate for a particular address.
View the 2026 source ↗This calculator performs arithmetic using the selected or manually entered rate. It does not determine nexus, taxability, sourcing, exemptions, filing obligations, or provide tax, accounting, or legal advice. Confirm the transaction's exact rate with the applicable state or local tax authority.
Illinois rate guide
Calculate Illinois sales tax with the right context.
Illinois has a 6.25% state rate, with local and special-district additions that can make the actual combined rate substantially different by location.
Population-weighted estimate
Statewide estimating average
2026 general-rate dataset
$6.25 tax → $106.25 total
Multiply $100 by 6.25% to calculate the general state portion.
$8.98 tax → $108.98 total
This is a statewide estimate, not the exact amount for a specific address.
Reverse tax from $100
At 6.25%, a $100 tax-inclusive total contains approximately $94.12 before tax and $5.88 in tax.
Verify before collecting
Illinois rate details can depend on the seller, delivery location, and applicable local taxes. Verify the transaction with the state's official tools.
Official Illinois source
Illinois Department of Revenue
Use the state authority to confirm current rates, taxable items, sourcing, exemptions, registration, and filing obligations.
Common questions
Illinois sales-tax answers.
What is the Illinois state sales-tax rate?
Illinois's general statewide base rate in this July 1, 2026 dataset is 6.25%. Local or category-specific rules may change the rate that applies.
How much is Illinois sales tax on $100?
At the 6.25% state base, the tax is $6.25 and the total is $106.25. At the 8.98% statewide average combined rate, the estimated tax is $8.98.
Can I use the average combined Illinois rate at checkout?
Not as a substitute for an exact rate lookup. The combined figure is a population-weighted estimate, while a real transaction can depend on location and taxability rules.
When was this Illinois rate page updated?
The general rate dataset is current as of July 1, 2026. Follow the official state link for later changes and transaction-specific guidance.
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