{"state":"IL","retrieved":"October 12, 2026","kind":"estimate","local_avg":2.71,"effective":"January 1, 2026 (average)","notes":["Illinois local taxes on dealer sales depend on the dealer's location (and Chicago/Cook add their own); private-party sales use a separate flat Private Party Vehicle Use Tax (RUT-50) by price/age. Why still an estimate: the rate follows the seller's location, not yours, so a home-county picker would be wrong.","This is a population-weighted average of local rates for general sales, not your exact rate. Enter your own local rate if you know it."],"sources":[{"t":"Tax Foundation, Facts & Figures 2026, Table 18 (average local sales tax rate, as of January 1, 2026)","u":"https://taxfoundation.org/wp-content/uploads/2026/05/TaxFoundation_FactsFigures26-5-28.pdf"}]}