ALLIANT ENERGY CORPORATION Exhibit 12
RATIO OF EARNINGS TO FIXED CHARGES
Years Ended December 31,
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2002 2001 2000 1999 1998
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(Dollars in thousands)
Income from continuing operations $76,269 $126,245 $330,915 $154,334 $95,437
Income taxes 36,108 50,767 226,180 109,337 71,537
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Income from continuing operations before income taxes 112,377 177,012 557,095 263,671 166,974
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Interest expense 186,538 185,604 168,149 131,608 123,769
Preferred dividend requirements of consolidated
subsidiaries (pre-tax basis) 8,875 9,286 11,210 11,259 11,391
Estimated interest component of rent expense 12,391 11,379 12,135 11,212 8,781
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Fixed charges as defined 207,804 206,269 191,494 154,079 143,941
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Adjustment for undistributed equity earnings (3,731) (8,684) (14,397) (475) (756)
Adjustment for preferred dividend requirements of consolidated
subsidiaries (pre-tax basis) (8,875) (9,286) (11,210) (11,259) (11,391)
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Earnings as defined $307,575 $365,311 $722,982 $406,016 $298,768
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Ratio of Earnings to Fixed Charges (Unaudited) * 1.48 1.77 3.78 2.64 2.08
* The ratio of earnings to fixed charges calculation in the above table relates to Alliant Energy Corporation's continuing
operations. Refer to Note 16 of Alliant Energy Corporation's "Notes to Consolidated Financial Statements" in Alliant Energy
Corporation's Form 10-K for the annual period ended December 31, 2002 for information related to Alliant Energy Corporation's
discontinued operations.