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