Check a receipt subtotal
Work backward from the final Chicago total when the receipt shows tax but the original subtotal is unclear.
Tax included calculator
Chicago Reverse Sales Tax Calculator
For receipts associated with Cook County, start with Chicago's 10.25% reference rate. For the most accurate result, replace it with the exact combined rate shown on the transaction.
Reference location: Cook County. Confirm current address-level rates with Illinois Department of Revenue.
Calculate in seconds
Enter the total you paid and the tax rate
$
The final price you paid%
Chicago, IL combined rateReverse the included tax
Divide the total by 1.1025
The rate was added to the original price. Dividing by the tax multiplier reverses it correctly; subtracting 10.25% from the final total does not.
Chicago pre-tax formula= Total paid / 1.1025Included tax = Total paid - Original price
Use the calculator carefully
Three checks before reversing a total in Chicago
Local boundaries and product rules can matter more than small differences in the formula, so confirm the input before relying on the result.
Prepare an expense report
Separate the pre-tax business expense from the tax portion without estimating by subtraction.
Review a refund
Compare the returned subtotal and tax with the amount originally paid in Chicago.
State and local rate combined
Chicago rate breakdown
Chicago's reference rate combines a 6.25% state portion with 4% in local taxes. City, county, transit, and special-district boundaries can affect the exact local mix.
| Rate component | Reference rate | What it represents |
|---|---|---|
| Illinois state portion | 6.25% | State-level portion used by this city record |
| Local combined portion | 4% | City, county, transit, or district taxes combined |
| Chicago reference total | 10.25% | Cook County |
City boundaries and special districts can change the exact rate. Use the transaction rate or verify the address with Illinois Department of Revenue.
Worked with 10.25%
Chicago reverse-tax examples
Each amount below is treated as a final price that already includes the 10.25% reference rate. Results are rounded to the nearest cent.
| Total paid | Price before tax | Tax included |
|---|---|---|
| $35.00 | $31.75 | $3.25 |
| $90.00 | $81.63 | $8.37 |
| $200.00 | $181.41 | $18.59 |
| $1000.00 | $907.03 | $92.97 |
Local context
Chicago compared with the Illinois average
Chicago's 10.25% reference rate is 1.27 percentage points above Illinois's 8.98% average. A statewide average is useful for context, but the transaction location is more useful for checking a receipt.
Chicago ranks #1 by combined rate among the 3 supported Illinois city pages.
On a $100 tax-inclusive total$90.70estimated pre-tax price at 10.25%
Questions answered
Chicago Sales Tax Questions
What sales tax rate should I use for Chicago?
Start with the 10.25% combined reference rate shown here, but use the exact rate on the receipt or the official address lookup whenever it is available.
How do I remove Chicago sales tax from a total?
Divide the tax-inclusive total by 1.1025. For example, a total of $110.25 at 10.25% becomes $100.00 before tax.
How is the Chicago reference rate built?
It combines a 6.25% state portion with 4% in local taxes. The local total may include more than one taxing jurisdiction.
Why might a Chicago receipt show a different rate?
The purchase may fall outside city limits, use a different local district, involve an exempt or specially taxed item, or follow delivery and sourcing rules. The receipt and official address lookup are the best checks.
Can I use this Chicago calculator for refunds or expenses?
Yes. It can separate a final amount into the estimated pre-tax price and included tax. Keep the original receipt and official rate evidence when documentation is required.
Official rate check
Verify before filing or collecting tax
This page is for receipt checks and estimates. Use the official state authority for current address-level rates, exemptions, sourcing rules, and compliance decisions.
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