Exhibit (12)(a) CMS ENERGY CORPORATION Ratio of Earnings to Fixed Charges and Preferred Securities Dividends and Distributions (Millions of Dollars) Years Ended December 31 - ------------------------------------ 2004 2003 2002 2001 2000 ----- ---- ----- ----- ----- (b) (c) (d) (e) Earnings as defined (a) Pretax income from continuing operations $ 137 $ 16 $(433) $(428) $ (1) Exclude equity basis subsidiaries (88) (41) (39) 68 (171) Fixed charges as defined, adjusted to exclude capitalized interest of $(25), $9, $16, $35 and $48 million for the years ended December 31, 2004, 2003, 2002, 2001, and 2000, respectively (f) 649 605 518 577 561 ----- ---- ----- ----- ----- Earnings as defined $ 698 $580 $ 46 $ 217 $ 389 ===== ==== ===== ===== ===== Fixed charges as defined (a) Interest on long-term debt $ 560 $531 $ 404 $ 420 $ 420 Estimated interest portion of lease rental 4 7 10 11 11 Other interest charges 49 61 34 83 34 Preferred securities dividends and distributions 11 15 86 98 144 ----- ---- ----- ----- ----- Fixed charges as defined $ 624 $614 $ 534 $ 612 $ 609 ===== ==== ===== ===== ===== Ratio of earnings to fixed charges and preferred securities dividends and distributions 1.12 -- -- -- -- ===== ==== ===== ===== ===== NOTES: (a) Earnings and fixed charges as defined in instructions for Item 503 of Regulation S-K. (b) For the year ended December 31, 2003, fixed charges exceeded earnings by $34 million. Earnings as defined include $95 million of asset impairment charges. (c) For the year ended December 31, 2002, fixed charges exceeded earnings by $488 million. Earnings as defined include $602 million of asset impairments charges. (d) For the year ended December 31, 2001, fixed charges exceeded earnings by $395 million. Earnings as defined include $323 million of asset impairments charges. (e) For the year ended December 31, 2000, fixed charges exceeded earnings by $220 million. Earnings as defined include a $329 million pretax impairment loss on the Loy Yang investment. (f) Fixed charges, adjusted as defined, excludes $25 million of previously capitalized interest that was expensed in the year ended December 31, 2004. Capitalized interest includes a $30.8 million reversal of previously recorded AFUDC/IDC on capital expenditures covered by Public Act 141.