Exhibit 12.01 NORTHERN STATES POWER COMPANY AND SUBSIDIARY COMPANIES STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Earnings 1993 1992 1991 1990 1989 (Thousands of dollars) Income from continuing operations before accounting change $211,740 $160,928 $207,012 $192,971 $219,165 Add Taxes based on income Federal income taxes (1) 99,952 71,549 75,905 120,686 92,638 State income taxes (1) 28,076 19,148 22,209 34,442 25,566 Deferred income taxes-net 12,256 5,185 26,506 (31,794) 7,541 Investment tax credit adjustment - net (9,544) (9,708) (9,189) (10,048) (10,906) Fixed charges 113,562 109,888 110,146 111,826 109,466 Earnings $456,042 $356,990 $432,589 $418,083 $443,470 Fixed charges Interest charges per statement of income $113,562 $109,888 $110,146 $111,826 $109,466 Ratio of earnings to fixed charges 4.0 3.2 3.9 3.7 4.1 (1) Includes income taxes included in Miscellaneous Income Deductions and Non-operating Taxes.