Exhibit 12.1
ALLIANT ENERGY CORPORATION
RATIO OF EARNINGS TO FIXED CHARGES
Three Months Ended March 31, | Years Ended Dec. 31, | |||||||||||||||||||
2010 | 2009 | 2009 | 2008 | 2007 | 2006 | 2005 (a) | ||||||||||||||
(dollars in millions) | ||||||||||||||||||||
EARNINGS: | ||||||||||||||||||||
Net income from continuing operations attributable to Alliant Energy Corporation common shareowners | $43.4 | $72.6 | $110.7 | $280.0 | $424.7 | $338.3 | $56.4 | |||||||||||||
Income tax expense (benefit) (b) | 34.9 | (18.9 | ) | (9.2 | ) | 140.2 | 255.8 | 203.0 | (52.9) | |||||||||||
Subtotal | 78.3 | 53.7 | 101.5 | 420.2 | 680.5 | 541.3 | 3.5 | |||||||||||||
Fixed charges as defined | 52.0 | 44.1 | 200.7 | 186.5 | 185.6 | 213.4 | 226.7 | |||||||||||||
Adjustment for undistributed equity earnings | (1.3 | ) | (2.2 | ) | (6.7 | ) | (6.1 | ) | (7.8 | ) | (16.6 | ) | (41.7) | |||||||
Less: | ||||||||||||||||||||
Interest capitalized | - | - | - | - | - | - | 3.4 | |||||||||||||
Preferred dividend requirements of subsidiaries (pre-tax basis) (c) | 8.1 | 3.6 | 17.4 | 27.5 | 29.5 | 29.3 | 5.5 | |||||||||||||
Total earnings as defined | $120.9 | $92.0 | $278.1 | $573.1 | $828.8 | $708.8 | $179.6 | |||||||||||||
FIXED CHARGES: | ||||||||||||||||||||
Interest expense | $40.7 | $35.7 | $154.9 | $125.8 | $116.7 | $145.7 | $175.8 | |||||||||||||
Interest capitalized | - | - | - | - | - | - | 3.4 | |||||||||||||
Estimated interest component of rent expense | 3.2 | 4.8 | 28.4 | 33.2 | 39.4 | 38.4 | 42.0 | |||||||||||||
Preferred dividend requirements of subsidiaries (pre-tax basis) (c) | 8.1 | 3.6 | 17.4 | 27.5 | 29.5 | 29.3 | 5.5 | |||||||||||||
Total fixed charges as defined | $52.0 | $44.1 | $200.7 | $186.5 | $185.6 | $213.4 | $226.7 | |||||||||||||
Ratio of Earnings to Fixed Charges (d) | 2.33 | 2.09 | 1.39 | 3.07 | 4.47 | 3.32 | 0.79 | |||||||||||||
(a) For the year ended Dec. 31, 2005, earnings as defined were inadequate to cover fixed charges as defined by $47.1 million.
(b) Includes net interest related to unrecognized tax benefits.
(c) Preferred dividend requirements of subsidiaries (pre-tax basis) are computed by dividing the preferred dividend requirements of subsidiaries by one hundred percent minus the respective year-to-date effective income tax rate.
(d) The ratio calculation in the above table relates to Alliant Energy Corporation’s continuing operations.