EXHIBIT 12 INDIANA GAS COMPANY, INC. AND SUBSIDIARY COMPANIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (In Thousands, Except Ratios) Fiscal Year Ended September 30 -------------------------------------------------------- 1999 1998 1997(1) 1996 1995 ------- ------- ------- ------- ------- Earnings: Net income $31,377 $30,883 $13,478 $38,630 $32,109 Income taxes 16,967 17,510 7,147 22,568 18,630 Fixed charges (see below) 16,343 16,967 17,728 16,844 16,395 ------- ------- ------- ------- ------- Total adjusted earnings $64,687 $65,360 $38,353 $78,042 $67,134 ------- ------- ------- ------- ------- Fixed charges: Total interest expense $16,012 $16,234 $16,774 $15,907 $15,530 Interest component of rents 331 733 954 937 865 ------- ------- ------- ------- ------- Total fixed charges $16,343 $16,967 $17,728 $16,844 $16,395 ------- ------- ------- ------- ------- Ratio of earnings to fixed charges 4.0 3.9 2.2 4.6 4.1 ======= ======= ======= ======= ======= (1) Reflects the recording of restructuring costs in fiscal 1997 (see Item 8, Note 3). Indiana Gas' ratio of earnings to fixed charges for 1997 before restructuring costs was 4.4.