Business calculator

Illinois Sales Tax Calculator

Preloaded with the 6.25% Illinois state base rate. Adjust the rate for your local jurisdiction and estimate tax and totals in your browser — no signup, no data stored.

Estimate Illinois sales tax and final total

The tax rate field starts at the Illinois state base rate of 6.25%. If you know your combined state-plus-local rate, enter that instead — the Illinois Department of Revenue publishes current local rates.

Taxable / Before-Tax Amount

Tax rate %

Discount Amount (Optional)

Currency prefix/code

Used for display only. No currency conversion is performed.

Taxable Amount0.00

Estimated Tax0.00

Total After Tax & Discount0.00

How this is calculated: Taxable Amount = Before-Tax Amount. Estimated Tax = Taxable Amount × Tax Rate ÷ 100. Total After Tax & Discount = Taxable Amount + Estimated Tax - Discount Amount.

Note: This calculator is for planning only. Illinois rates change and local rates vary by jurisdiction, product, service type, and exemption status. Confirm the current rate with the Illinois Department of Revenue before sending documents.

Illinois Sales Tax Rates At A Glance

Illinois charges a state base rate of 6.25%. Illinois starts at 6.25% and stacks home-rule city, county, and transit district taxes on top. Chicago's combined general merchandise rate reaches 10.25%, among the highest big-city rates in the country. Groceries and qualifying drugs are taxed at a reduced state rate.

Component	Rate
Illinois state base rate	6.25%
Typical local additions	0% – ~4.75%
Combined rate reach	10.25% in Chicago

Rates as commonly published; local rates change. Verify current rates with the Illinois Department of Revenue.

How Illinois sourcing works

Illinois retailers' occupation tax is generally origin-based for in-state sellers, with separate rules for remote sellers, which are destination-based.

Using the calculator with Illinois rates

Start with the preloaded 6.25% state rate, then replace it with your full combined rate when you know it.
Use the invoice generator when you need taxable and non-taxable line items on the same document.
Apply discounts consistently according to the rules that apply to your transaction.
Keep the calculation with the related invoice or receipt for your records.

Illinois Sales Tax FAQ

What is the Illinois sales tax rate?

The state base rate is 6.25%. Local home-rule and district taxes stack on top, and Chicago's combined general merchandise rate is 10.25%.

Why is Chicago's rate so high?

Chicago layers the state rate, Cook County's rate, the city's home-rule rate, and the regional transportation authority rate. The layers combine to 10.25% on general merchandise.

Do groceries get the full Illinois rate?

Qualifying groceries and drugs have historically been taxed at a reduced state rate rather than the full 6.25%, with local taxes varying. Grocery treatment has changed in recent years, so confirm current rules with the Illinois DOR.

Is this calculator tax advice?

No. It is a math helper only. Confirm the correct combined rate and category rules with the Illinois Department of Revenue or a qualified professional.

Useful next steps

Create an invoiceAdd your IL tax rate directly inside the document generator.Ohio Sales Tax CalculatorPreloaded with the 5.75% OH state base rate.Texas Sales Tax CalculatorPreloaded with the 6.25% TX state base rate.

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