To calculate sales tax in Wisconsin, find the combined state and local rate that applies to the sale’s location, multiply it by the taxable price, and round to the nearest cent. The state rate is 5%, and most counties add 0.5%, so the typical combined rate is 5.5%. In the City of Milwaukee it climbs to 7.9%, and ten tourism-dependent municipalities add a premier resort area tax on top of the state and county rates.
The Three Steps
Say you’re buying a $250 item in a county with the standard 0.5% local tax.
- Add the rates: 5.0% state + 0.5% county = 5.5%. As a decimal, that’s 0.055.
- Multiply by the taxable price: $250.00 × 0.055 = $13.75.
- Round to the nearest cent. Fractions below half a cent round down; half a cent or more rounds up.1Wisconsin State Legislature. Wisconsin Administrative Code Tax 11.32
The buyer pays $263.75 total. Rounding matters most on small tickets: a $1.50 purchase at 5.5% works out to $0.0825, which rounds up to $0.08.1Wisconsin State Legislature. Wisconsin Administrative Code Tax 11.32
Run the same $250 purchase inside the City of Milwaukee at 7.9%: $250.00 × 0.079 = $19.75 in tax, for a total of $269.75. Six dollars of the difference comes down to location alone.
Finding the Rate for Your Address
The state rate of 5% applies everywhere.2Wisconsin Department of Revenue. Sales and Use Tax Information for Wisconsin Counties and Municipalities, Pub 209 Seventy of Wisconsin’s 72 counties add a 0.5% county tax, so 5.5% is the usual combined rate.3Department Of Revenue. Tax Rates Two counties have not adopted the local tax, so purchases there are taxed at 5% flat.
Milwaukee is the big exception. Milwaukee County’s rate is 0.9% rather than 0.5%, and the City of Milwaukee layers on its own 2% city tax. Inside city limits the combined rate is 7.9%: 5% state, 0.9% county, 2% city.4Department Of Revenue. City of Milwaukee Sales and Use Taxes
Ten tourism municipalities add a premier resort area tax. Most charge 0.5%; the City of Wisconsin Dells and Village of Lake Delton charge 1.25%, which puts the combined rate in the Dells at 6.75% (5% + 0.5% + 1.25%). The other premier resort municipalities are the City of Bayfield, City of Eagle River, Village of Sister Bay, Village of Ephraim, Village of Stockholm, and the City of Rhinelander. The City of Sturgeon Bay and the Town of Minocqua join the list effective July 1, 2026.5Department Of Revenue. Premier Resort Area Tax
Rather than guess, use the Wisconsin Department of Revenue’s rate lookup tool. Enter a street address with a five-digit zip, or just the nine-digit zip, and it returns the combined rate for that location.6Department Of Revenue. Wisconsin State and Local Sales Tax Rate Lookup Sellers are required to collect at the rate for the sale’s location, even if they have no presence in that county or city.2Wisconsin Department of Revenue. Sales and Use Tax Information for Wisconsin Counties and Municipalities, Pub 209
What Counts as the Taxable Price
Tax applies to the total the seller receives, not just the sticker price. Some charges buyers expect to be separate are actually part of the taxable base.
- Delivery charges on taxable goods are taxable, even when listed as a separate line on the invoice.7Cornell Law Institute. Wisconsin Administrative Code Tax 11.94
- Installation fees for a taxable product are generally folded into the taxable amount.
- Manufacturer coupons don’t reduce the taxable amount, because the retailer is reimbursed for the full price. Store coupons do reduce it.
There’s one notable deduction for vehicle buyers. When you trade in a motor vehicle on the purchase of another vehicle in the same transaction, the trade-in value is subtracted from the price before tax is calculated.8Wisconsin State Legislature. Wisconsin Administrative Code Tax 11.83(2)(a)
What’s Exempt So You Don’t Tax It
Before you calculate, make sure the item is actually taxable. Several everyday categories are not.
- Most unprepared grocery food and food ingredients are exempt. Candy, soft drinks, dietary supplements, and prepared food are taxable.9Wisconsin State Legislature. Wisconsin Administrative Code Tax 11.87
- Drugs prescribed by a licensed physician and dispensed by a registered pharmacist are exempt. Over-the-counter medications are taxable.10Wisconsin State Legislature. Wisconsin Administrative Code Tax 11.45
- Prosthetic devices, mobility-enhancing equipment, and durable medical equipment used in the home by a human being are exempt.10Wisconsin State Legislature. Wisconsin Administrative Code Tax 11.45
Other exemptions cover qualifying nonprofits and certain agricultural goods. For any exempt sale, the seller must collect a completed exemption certificate (Form S-211) from the buyer, either before the sale or within 90 days afterward. Without it, the seller stays on the hook for the tax.11Wisconsin State Legislature. Wisconsin Administrative Code Tax 11.14
If the Seller Didn’t Charge Tax
Buying a taxable item without being charged Wisconsin sales tax doesn’t make the purchase tax-free. You owe use tax at the same combined rate that would have applied if the seller had collected it. The common situations are online orders from out-of-state retailers who aren’t registered in Wisconsin, items bought during out-of-state travel and brought home, and goods ordered from sellers outside the United States.12Wisconsin State Legislature. Wisconsin Use Tax Fact Sheet 2104 Individuals report use tax on their Wisconsin income tax return. The calculation is the same: taxable price times the combined rate for your location, rounded to the nearest cent.