Illinois drivers will not face the scheduled 1.3-cent motor fuel tax increase in 2026. The Illinois gas tax will remain at 48.3 cents per gallon through Thursday, December 31, 2026, before rising to 49.6 cents on Friday, January 1, 2027. Illinois Gas Tax Increase Delayed for Six Months The scheduled increase was suspended beginning Wednesday, July 1, 2026. The temporary pause does not reduce the existing gasoline tax. It postpones only the inflation-link