Exhibit 12.1
ALLIANT ENERGY CORPORATION
RATIO OF EARNINGS TO FIXED CHARGES
Nine Months Ended Sep. 30, | 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 | $ | 242.3 | $ | 57.9 | $ | 110.1 | $ | 279.4 | $ | 425.1 | $ | 337.8 | $ | 57.8 | ||||||||||||||
Income tax expense (benefit) (b) | 121.8 | (26.6 | ) | (9.3 | ) | 139.6 | 256.3 | 202.8 | (53.2 | ) | ||||||||||||||||||
Subtotal | 364.1 | 31.3 | 100.8 | 419.0 | 681.4 | 540.6 | 4.6 | |||||||||||||||||||||
Fixed charges as defined | 167.6 | 147.7 | 200.6 | 186.5 | 185.6 | 213.4 | 226.8 | |||||||||||||||||||||
Adjustment for undistributed equity earnings | (4.2 | ) | (4.9 | ) | (6.7 | ) | (6.1 | ) | (7.8 | ) | (16.6 | ) | (41.7 | ) | ||||||||||||||
Less: | ||||||||||||||||||||||||||||
Interest capitalized | — | — | — | — | — | — | 3.4 | |||||||||||||||||||||
Preferred dividend requirements of subsidiaries (pre-tax basis) (c) | 20.7 | 8.8 | 17.3 | 27.5 | 29.5 | 29.3 | 5.7 | |||||||||||||||||||||
Total earnings as defined | $ | 506.8 | $ | 165.3 | $ | 277.4 | $ | 571.9 | $ | 829.7 | $ | 708.1 | $ | 180.6 | ||||||||||||||
FIXED CHARGES: | ||||||||||||||||||||||||||||
Interest expense | $ | 122.2 | $ | 113.8 | $ | 154.9 | $ | 125.8 | $ | 116.7 | $ | 145.7 | $ | 175.8 | ||||||||||||||
Interest capitalized | — | — | — | — | — | — | 3.4 | |||||||||||||||||||||
Estimated interest component of rent expense | 24.7 | 25.1 | 28.4 | 33.2 | 39.4 | 38.4 | 41.9 | |||||||||||||||||||||
Preferred dividend requirements of subsidiaries (pre-tax basis) (c) | 20.7 | 8.8 | 17.3 | 27.5 | 29.5 | 29.3 | 5.7 | |||||||||||||||||||||
Total fixed charges as defined | $ | 167.6 | $ | 147.7 | $ | 200.6 | $ | 186.5 | $ | 185.6 | $ | 213.4 | $ | 226.8 | ||||||||||||||
Ratio of Earnings to Fixed Charges (d) | 3.02 | 1.12 | 1.38 | 3.07 | 4.47 | 3.32 | 0.80 | |||||||||||||||||||||
(a) | For the year ended Dec. 31, 2005, earnings as defined were inadequate to cover fixed charges as defined by $46.2 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. |