Exhibit 12.01
PUBLIC SERVICE CO. OF COLORADO AND SUBSIDIARIES
STATEMENT OF COMPUTATION OF
RATIO OF EARNINGS TO FIXED CHARGES
(amounts in thousands, except ratio)
| | | Year Ended Dec. 31 | |
| | | 2012 | | | 2011 | | | 2010 | | | 2009 | | | 2008 | |
| Earnings, as defined: | | | | | | | | | | | | | | | |
| Pretax income from operations | | $ | 690,620 | | | $ | 625,164 | | | $ | 628,901 | | | $ | 493,725 | | | $ | 506,424 | |
| Add: Fixed charges | | | 254,443 | | | | 253,867 | | | | 233,604 | | | | 224,041 | | | | 199,739 | |
| Total earnings, as defined | | $ | 945,063 | | | $ | 879,031 | | | $ | 862,505 | | | $ | 717,766 | | | $ | 706,163 | |
| | | | | | | | | | | | | | | | | | | | | |
| Fixed charges, as defined: | | | | | | | | | | | | | | | | | | | | |
| Interest charges | | $ | 188,094 | | | $ | 186,885 | | | $ | 171,945 | | | $ | 166,212 | | | $ | 154,313 | |
| Interest charges on life insurance policy borrowings | | | 310 | | | | 332 | | | | 372 | | | | 324 | | | | 248 | |
| Interest component of leases | | | 66,039 | | | | 66,650 | | | | 61,287 | | | | 57,505 | | | | 45,178 | |
| Total fixed charges, as defined | | $ | 254,443 | | | $ | 253,867 | | | $ | 233,604 | | | $ | 224,041 | | | $ | 199,739 | |
| Ratio of earnings to fixed charges | | | 3.7 | | | | 3.5 | | | | 3.7 | | | | 3.2 | | | | 3.5 | |
