Exhibit 12.2
INTERSTATE POWER AND LIGHT COMPANY
RATIO OF EARNINGS TO FIXED CHARGES AND RATIO OF EARNINGS TO COMBINED FIXED CHARGES
AND PREFERRED DIVIDEND REQUIREMENTS
Six Months | |||||||||
Ended June 30, | Years Ended December 31, | ||||||||
2006 | 2005 | 2005 | 2004 | 2003 | 2002 | 2001 | |||
(dollars in millions) | |||||||||
EARNINGS: | |||||||||
Net income | $65.7 | $46.2 | $165.1 | $125.7 | $100.7 | $90.9 | $98.1 | ||
Income taxes | 25.3 | 31.5 | 80.8 | 61.7 | 71.3 | 62.3 | 53.0 | ||
Income before income taxes | 91.0 | 77.7 | 245.9 | 187.4 | 172.0 | 153.2 | 151.1 | ||
Fixed charges as defined | 35.9 | 37.5 | 72.5 | 72.3 | 69.4 | 68.1 | 69.6 | ||
Total earnings as defined | $126.9 | $115.2 | $318.4 | $259.7 | $241.4 | $221.3 | $220.7 | ||
FIXED CHARGES: | |||||||||
Interest expense | $35.1 | $35.3 | $67.7 | $67.9 | $65.4 | $63.7 | $64.6 | ||
Estimated interest component of rent expense | 0.8 | 2.2 | 4.8 | 4.4 | 4.0 | 4.4 | 5.0 | ||
Total fixed charges as defined | $35.9 | $37.5 | $72.5 | $72.3 | $69.4 | $68.1 | $69.6 | ||
Ratio of Earnings to Fixed Charges (Unaudited) | 3.53 | 3.07 | 4.39 | 3.59 | 3.48 | 3.25 | 3.17 | ||
Preferred dividend requirements (pre-tax basis) * | $10.7 | $13.0 | $22.9 | $23.0 | $23.2 | $4.9 | $5.2 | ||
Fixed charges and preferred dividend requirements | $46.6 | $50.5 | $95.4 | $95.3 | $92.6 | $73.0 | $74.8 | ||
Ratio of Earnings to Combined Fixed Charges and | |||||||||
Preferred Dividend Requirements (Unaudited) | 2.72 | 2.28 | 3.34 | 2.73 | 2.61 | 3.03 | 2.95 | ||
* Preferred dividend requirements (pre-tax basis) are computed by dividing the preferred dividend requirements by one hundred percent minus the respective year-to-date effective income tax rate.