August Illinois Flash Index increased modestly
The Illinois Flash Index posted a modest but unexpected gain in August 2026, rising to 101.5 from 101.2 in July.
“The increase was driven by strong state tax revenue growth and a decline in Illinois’ unemployment rate,” said Fred Giertz, Professor Emeritus at the Institute of Government and Public Affairs, University of Illinois Urbana-Champaign.
Even so, the Index remains within the relatively narrow range it has occupied for more than a year, signaling continued but measured economic expansion. The latest reading also aligns with the national outlook of slow and steady growth, a pace one observer described as simply “chugging along.”
That stability, however, may not fully capture the uncertainty created by recent turmoil in bond markets and the prospect of rising interest rates, developments that could weigh on economic activity in the months ahead.
A key contributor to August’s increase was the strength of Illinois tax revenues. After adjusting for inflation, income tax, sales tax, and corporate tax receipts all rose by more than 5 percent compared with a year earlier. Labor market conditions also improved, with the state’s unemployment rate falling to 4.9 percent in August from 5.1 percent in July.
Together, these indicators point to an Illinois economy that continues to expand, albeit at a gradual pace, despite growing headwinds in the broader financial environment.
The Flash Index is the weighted average of Illinois growth rates in corporate earnings, consumer spending, and personal income as estimated from receipts for corporate income, individual income, and retail sales taxes. These revenues are adjusted for inflation before growth rates are calculated. The growth rate for each component is calculated for the 12-month period using data through August 31, 2026.
