9.75% retail sales tax Rob McColley October 28, 2011 - 9:05amJanuary 27, 2022 - 11:09pm If you’re shopping in Champaign or Urbana, you’re now paying a tithe. The county schools tax bumped our rate to 8.75%, by referendum in April 2009. I don’t know where the additional percent came from, but at this point it hardly matters, right?