Chicago is a city where the tax line changes under a store's feet and the calendar is built around two street events. The Illinois Department of Revenue's worked example for a general merchandise sale in the city adds up to 10.25 percent, and its June 2026 bulletin raised the transit piece of that stack by a quarter point from Aug. 1, 2026. The events are the Wintrust Magnificent Mile Lights Festival, set for Nov. 21, 2026, and the Bank of America Chicago Marathon, listed for Sunday, Oct. 10, 2027. A Shopify store that sells to Chicago shoppers can tie a free-shipping landing page to each, give it an end time, and price it with the tax stack in view.
O'Hare's own year-end traffic summary for 2025 lists 2,125,628.1 metric tonnes of cargo, so a Chicago-area store that ships or receives by air works beside an airport moving more than two million metric tonnes a year, though service and prices are set carrier by carrier.
Build one landing page for the Lights Festival and set free shipping to apply only to shoppers who arrive from it. Give it a start and end time, and compare its orders with the same weekday the week before.
Source: The Magnificent Mile Association: Wintrust Magnificent Mile Lights Festival
Check it against a shopper's total with tax in Cook County. The Department's example stack was 10.25 percent and rose by 0.25 points from Aug. 1, 2026, so a threshold written as 75 dollars is a 75 dollar product total, not a 75 dollar charge.
Re-check the race date on the organizer's page first, then publish a second landing page for the week and end it on race day. Keep the same free shipping terms as the festival page so shoppers see one rule, not two.
Source: Bank of America Chicago Marathon: Future Event Dates
Turn the landing page off the day it ends and read the result: shipping you absorbed on the orders that came through it, as a share of the margin on those orders. Keep the offer only if that share is the one your plan allowed.
Source: Illinois Department of Revenue: How Sales and Use Taxes are Distributed (PIO-114), Example 1
Build it with the Landing page shipping template.
Requires: Growth plan or higher, A developer to set up the storefront side.
The marathon is listed for Sunday, Oct. 10, 2027. A landing page that offers free shipping only to shoppers who arrive from your marathon-week email or post starts and ends with the week, and its end time sits in the banner so it cannot drift into your regular shipping policy. The organizers say the date is subject to change, so build the page after you re-check theirs.
Source: Bank of America Chicago Marathon: Future Event Dates
The Lights Festival is set for Saturday, Nov. 21, 2026, and the Association has not published a 2027 date. Use the 2026 day as a rehearsal for the holiday season: a landing page that is live for the day of the parade, ends at midnight and reports its own orders tells you what a single-day free shipping offer costs before Black Friday.
Source: The Magnificent Mile Association: Wintrust Magnificent Mile Lights Festival
The Department's worked example for a Chicago general merchandise sale totals 10.25 percent with a 1.00 percent transit component. With the transit rate at 1.25 percent from Aug. 1, 2026 and the other pieces unchanged, the same stack adds up to 10.50 percent, so a 100 dollar basket carries 10.50 dollars of tax instead of 10.25. Write your threshold before tax and say so.
The Illinois Department of Revenue's distribution guide shows a worked example of a general merchandise sale in the City of Chicago in Cook County: the 6.25 percent state tax, a 1.00 percent RTA tax, a 1.25 percent Chicago Home Rule tax and a 1.75 percent Cook County Home Rule tax, totaling 10.25 percent.
Illinois Department of Revenue: How Sales and Use Taxes are Distributed (PIO-114), Example 1 (accessed October 10, 2026)
The Department's Informational Bulletin FY 2026-34 (June 2026) says that effective Aug. 1, 2026 the Northern Illinois Transit Authority (formerly the Regional Transportation Authority) occupation and use tax rate rises by 0.25 percent in Cook, DuPage, Kane, Lake, McHenry and Will counties, and that the new rate is 1.25 percent for general merchandise.
Illinois Department of Revenue: FY 2026-34, NITA Occupation and Use Tax Rate Change, Effective August 1, 2026 (accessed October 10, 2026)
Chicago O'Hare's year-to-date summary as of December 2025 lists total cargo tonnage of 2,125,628.1 metric tonnes, made up of 1,928,542.1 tonnes of freight, 148,250.0 of express and 48,836.0 of mail.
Chicago Department of Aviation: O'Hare Year-To-Date Operations, Passengers, Cargo Summary By Class (December 2025) (accessed October 10, 2026)
The Chicago Marathon's future event dates page lists Sunday, Oct. 10, 2027 for the next running after Sunday, Oct. 11, 2026, and notes that the dates are subject to change.
Bank of America Chicago Marathon: Future Event Dates (accessed October 10, 2026)
The Magnificent Mile's Lights Festival page lists the 2026 festival for Nov. 21, 2026, with the Grand Marshals stepping off at 5:30 p.m. from Oak Street and Michigan Avenue, and describes the parade as the largest nighttime parade in the United States; the page gives no 2027 date.
The Magnificent Mile Association: Wintrust Magnificent Mile Lights Festival (accessed October 10, 2026)
The Census Bureau's Vintage 2025 estimate for the city of Chicago is 2,731,585 people.
U.S. Census Bureau: Annual Estimates of the Resident Population for Incorporated Places (Vintage 2025, SUB-EST2025) (accessed October 10, 2026)
Not tax advice. Confirm current rules with the state revenue department before you rely on a date or an exemption.
Requires: Growth plan or higher, A developer to set up the storefront side.
