When are the big Wisconsin events in 2027?

EAA lists AirVenture Oshkosh for July 26 to August 1, 2027. The Wisconsin State Fair's site shows August 5 to 15, 2027, and World Dairy Expo lists September 28 to October 1, 2027 in Madison. Check each organizer before you schedule an offer, because dates can change.

What is the sales tax rate in Wisconsin?

The Department of Revenue lists a 5 percent state rate and a 0.5 percent county tax adopted by seventy counties. Milwaukee County is at 0.9 percent and the City of Milwaukee adds 2 percent, both from January 1, 2024. Confirm the rate for an address with the Department; this is not tax advice.

When must an online store collect Wisconsin sales tax?

The Department's remote sellers FAQ says a remote seller must collect if its gross sales into Wisconsin exceed 100,000 dollars in the previous or current calendar year, and that the 200-transaction test was eliminated effective February 20, 2021. Confirm your own position with the Department; this is not tax advice.

Does Wisconsin have a back-to-school tax holiday?

None of the Department of Revenue pages used for this page announces one, so this page plans around event dates instead. Check the Department's site before you promote anything as tax free.

Wisconsin's late-summer event calendar and a plan for event-week offers

Wisconsin's selling calendar bunches up between late July and early October. EAA AirVenture Oshkosh is listed for July 26 to August 1, 2027, the Wisconsin State Fair for August 5 to 15, 2027, and World Dairy Expo in Madison for September 28 to October 1, 2027. A store that ships into the state can give each of those windows one short, dated offer with a clear end. The tax side is short for most orders: the Department of Revenue lists a 5 percent state rate, and a 0.5 percent county tax that seventy counties have adopted. Milwaukee County and the City of Milwaukee added their own taxes in 2024. This page sets the three event dates against those rates, then builds a plan that shows one live offer at a time on the storefront.

Updated October 10, 2026 · 10 sourced facts

Photo: Michael Barera, CC BY-SA via Wikimedia Commons

Dates to plan around

Jul 26, 2027 to Aug 1, 2027EAA AirVenture OshkoshEAA: EAA AirVenture Oshkosh
Aug 5, 2027 to Aug 15, 2027Wisconsin State FairWisconsin State Fair Park: Wisconsin State Fair
Sep 28, 2027 to Oct 1, 2027World Dairy Expo, MadisonWorld Dairy Expo

A today's offers plan for three Wisconsin event windows

Before July 26, 2027
Pick one offer for the AirVenture window and write its end date, August 1, into the banner. EAA lists AirVenture for July 26 to August 1, 2027 in Oshkosh, so a seven-day offer that starts on the opening Monday and ends on the closing Sunday has a natural start and stop.
Source: EAA: EAA AirVenture Oshkosh
Aug. 5 to 15, 2027
Schedule a second offer for the State Fair's eleven days. The fair's site lists August 5 to 15, 2027 in West Allis, so end the offer on the closing Sunday and do not extend it. An offer that quietly runs on teaches shoppers to wait for the next one.
Source: Wisconsin State Fair Park: Wisconsin State Fair
Sept. 28 to Oct. 1, 2027
Give World Dairy Expo's four days in Madison their own short offer. The Expo's site estimates 51,525 attendees for 2025, so a Madison-area shopper is a plausible reader of a banner that names the dates, while the offer stays open to every shopper.
Source: World Dairy Expo (2025 estimate)
Whenever the offer is live
Turn on the Today's offers widget so the launcher lists only the offer that is running now. One live offer at a time keeps the message clear and makes each window's orders easy to read afterward.
Source: World Dairy Expo
When you quote prices
State whether a banner price includes tax. A 100 dollar order carries 5.50 dollars of tax in a county with the 0.5 percent county tax and 7.90 dollars inside the City of Milwaukee, so say that tax is added at checkout instead of promising an all-in price (those figures leave out separately listed local taxes).
Source: Wisconsin Department of Revenue: Tax Rates (effective Jan. 1, 2024)
As Wisconsin sales grow
Count gross sales into Wisconsin by calendar year. The Department says a remote seller must collect once those sales exceed 100,000 dollars in the previous or current calendar year, and that the older 200-transaction test no longer applies.
Source: Wisconsin Department of Revenue: Remote Sellers Common Questions

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Questions merchants ask

When are the big Wisconsin events in 2027?: EAA lists AirVenture Oshkosh for July 26 to August 1, 2027. The Wisconsin State Fair's site shows August 5 to 15, 2027, and World Dairy Expo lists September 28 to October 1, 2027 in Madison. Check each organizer before you schedule an offer, because dates can change.
What is the sales tax rate in Wisconsin?: The Department of Revenue lists a 5 percent state rate and a 0.5 percent county tax adopted by seventy counties. Milwaukee County is at 0.9 percent and the City of Milwaukee adds 2 percent, both from January 1, 2024. Confirm the rate for an address with the Department; this is not tax advice.
When must an online store collect Wisconsin sales tax?: The Department's remote sellers FAQ says a remote seller must collect if its gross sales into Wisconsin exceed 100,000 dollars in the previous or current calendar year, and that the 200-transaction test was eliminated effective February 20, 2021. Confirm your own position with the Department; this is not tax advice.
Does Wisconsin have a back-to-school tax holiday?: None of the Department of Revenue pages used for this page announces one, so this page plans around event dates instead. Check the Department's site before you promote anything as tax free.

The year at a glance

Shipping into the state

Wisconsin covers 54,158 square miles of land, and its sales tax is a short list of numbers. A 100 dollar order to an address in a county that has adopted the 0.5 percent county tax carries 5.50 dollars of state and county tax, and the same order inside the City of Milwaukee carries 7.90 dollars, because Milwaukee County and the city added their taxes on January 1, 2024. Both figures leave out the local exposition and premier resort area taxes that the Department lists on separate pages. Wisconsin is also the country's leading cheese state, with 3,643,832 thousand pounds in 2025, so food gifts are an obvious category here. This page verified no carrier rule for shipping perishables, so confirm packaging and cutoffs with your carrier before you promise a delivery date.

Source: U.S. Census Bureau: State Area Measurements (2010)

Source: Wisconsin Department of Revenue: Tax Rates

Source: Wisconsin Department of Revenue: Tax Rates (effective Jan. 1, 2024)

Source: USDA National Agricultural Statistics Service: Dairy Products 2025 Summary (April 2026)

Facts and sources

EAA's AirVenture page counts down to AirVenture 2027 and gives its dates as July 26 to August 1, 2027, in Oshkosh.
EAA: EAA AirVenture Oshkosh (accessed October 10, 2026)
The Wisconsin State Fair's home page carries a 2027 logo labeled with the dates August 5 to 15, 2027, and the site describes Wisconsin State Fair Park in West Allis as the home of the fair.
Wisconsin State Fair Park: Wisconsin State Fair (accessed October 10, 2026)
World Dairy Expo's site banner reads September 28 to October 1, 2027, and lists the Alliant Energy Center in Madison as the venue.
World Dairy Expo (accessed October 10, 2026)
The Expo's site gives an estimated attendance of 51,525 for the 2025 event.
World Dairy Expo (2025 estimate) (accessed October 10, 2026)
The Department of Revenue's tax rates page lists the state sales tax at 5 percent and a county tax of 0.5 percent that seventy counties have adopted.
Wisconsin Department of Revenue: Tax Rates (accessed October 10, 2026)
The same rates page shows Milwaukee County's tax at 0.9 percent, up from 0.5 percent, and a 2 percent City of Milwaukee tax, both effective January 1, 2024, so the state, county and city rates add up to 7.9 percent inside the city.
Wisconsin Department of Revenue: Tax Rates (effective Jan. 1, 2024) (accessed October 10, 2026)
The Department's remote sellers FAQ says that effective February 20, 2021 the 200-transaction threshold was eliminated, so a remote seller must collect only if its gross sales into Wisconsin exceed 100,000 dollars in the previous or current calendar year.
Wisconsin Department of Revenue: Remote Sellers Common Questions (accessed October 10, 2026)
USDA's annual dairy report lists Wisconsin's 2025 total cheese production, excluding cottage cheese, at 3,643,832 thousand pounds from 107 plants, and calls Wisconsin the leading state with 24.6 percent of the 14.8 billion pounds produced in the United States.
USDA National Agricultural Statistics Service: Dairy Products 2025 Summary (April 2026) (accessed October 10, 2026)
The same report says Wisconsin led the country in Italian cheese with 28.4 percent of production and in American-type cheese with 18.2 percent of production.
USDA National Agricultural Statistics Service: Dairy Products 2025 Summary (April 2026) (accessed October 10, 2026)
Wisconsin has 54,158 square miles of land area and 65,496 square miles in total.
U.S. Census Bureau: State Area Measurements (2010) (accessed October 10, 2026)

Cities in Wisconsin

MilwaukeeMilwaukee adds county and city sales taxes to Wisconsin's 5 percent. The address test, plus the 2027 lakefront festival dates and a festival-link code plan.

Not tax advice. Confirm current rules with the state revenue department before you rely on a date or an exemption.

Run the Wisconsin plan in Freebies Engine by Log Studio Lab.