Exhibit 12 TUCSON ELECTRIC POWER COMPANY COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES 12 Months Ended ------------------------------------------------------ Dec.31, Dec. 31, Dec. 31, Dec. 31, Dec. 31, 2001 2000 1999 1998 1997 - --------------------------------------------------------------------------------------------------- - Thousands of dollars - Fixed Charges: Interest on Long-Term Debt $61,218 $66,377 $66,836 $72,672 $66,247 Other Interest (1) 8,058 9,067 13,081 13,207 9,640 Interest on Capital Lease Obligations (2) 90,348 92,658 82,414 81,823 83,019 - --------------------------------------------------------------------------------------------------- Total Fixed Charges 159,624 168,102 162,331 167,702 158,906 Net Income 75,284 51,169 73,475 41,676 83,572 Less: Extraordinary Income and Accounting Change - Net of Tax 470 - 22,597 - - - --------------------------------------------------------------------------------------------------- Net Income from Continuing Operations 74,814 51,169 50,878 41,676 83,572 Add (Deduct): Losses from Equity Investees 700 1,543 - - - Income Taxes 55,910 26,566 22,350 17,578 (22,104) Total Fixed Charges 159,624 168,102 162,331 167,702 158,906 - --------------------------------------------------------------------------------------------------- Total Earnings before Taxes and Fixed Charges $291,048 $247,380 $235,559 $226,956 $220,374 =================================================================================================== Ratio of Earnings to Fixed Charges 1.823 1.472 1.451 1.353 1.387 <FN> (1) Excludes recognition of Allowance for Borrowed Funds Used during Construction. (2) Amounts have been restated for years ended 2001 - 2000 to conform to current year's presentatio </FN>