EX-12 3 sdc435a.txt RATIO COMPUTATION STATEMENT Exhibit 12 INTERSTATE POWER AND LIGHT COMPANY RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED DIVIDEND REQUIREMENTS
Three Months Ended Years Ended December 31, March 31, ------------------------------------------------------ 2003 2002 2001 2000 1999 1998 ----------- ------------------------------------------------------ (Dollars in thousands) Net income $24,957 $ 90,877 $ 98,066 $103,127 $ 97,292 $ 80,667 Income taxes 16,089 62,294 52,967 65,020 69,291 52,587 ----------- ------------------------------------------------------ Income before income taxes 41,046 153,171 151,033 168,147 166,583 133,254 ----------- ------------------------------------------------------ Interest expense 17,044 67,458 68,149 67,234 66,973 67,180 Estimated interest component of rent expense 933 4,394 4,923 5,530 4,539 4,588 ----------- ------------------------------------------------------ Fixed charges as defined 17,977 71,852 73,072 72,764 71,512 71,768 Preferred dividend requirements (pre-tax basis) 5,477 4,824 5,252 5,549 5,815 5,598 ----------- ------------------------------------------------------ Fixed charges and preferred dividend requirements 23,454 76,676 78,324 78,313 77,327 77,366 ----------- ------------------------------------------------------ Earnings as defined $59,023 $225,023 $224,105 $240,911 $238,095 $205,022 =========== ====================================================== Ratio of Earnings to Combined Fixed Charges and Preferred Dividend Requirements (Unaudited) 2.52 2.93 2.86 3.08 3.08 2.65 =========== ======================================================