Exhibit 12.01
PSCo
STATEMENT OF COMPUTATION OF
RATIO OF EARNINGS TO FIXED CHARGES
Thousands of Dollars
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| Six |
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| Months Ended |
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| June 30, |
| Year Ended December 31, |
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| 2007 |
| 2006 |
| 2005 |
| 2004 |
| 2003 |
| 2002 |
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Earnings as defined: |
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Pretax income from continuing operations |
| $ | 230,747 |
| $ | 346,938 |
| $ | 302,104 |
| $ | 307,869 |
| $ | 329,347 |
| $ | 404,729 |
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Add: |
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Fixed charges |
| 71,410 |
| 147,061 |
| 155,731 |
| 168,115 |
| 180,700 |
| 162,982 |
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Earnings as defined |
| 302,157 |
| 493,999 |
| 457,835 |
| 475,984 |
| 510,047 |
| 567,711 |
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Fixed charges: |
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Interest charges |
| 71,410 |
| 147,061 |
| 155,731 |
| 168,115 |
| 173,328 |
| 148,238 |
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Preference security dividend requirements of consolidated subsidiaries |
| — |
| — |
| — |
| — |
| 7,372 |
| 14,744 |
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Total fixed charges |
| $ | 71,410 |
| $ | 147,061 |
| $ | 155,731 |
| $ | 168,115 |
| $ | 180,700 |
| $ | 162,982 |
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Ratio of earnings to fixed charges |
| 4.2 |
| 3.4 |
| 2.9 |
| 2.8 |
| 2.8 |
| 3.5 |
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