EXHIBIT 12 THE WILLIAMS COMPANIES, INC. AND SUBSIDIARIES COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDEND REQUIREMENTS <Table> <Caption> YEARS ENDED DECEMBER 31, -------------------------------------------------- 2003 2002* 2001* 2000* 1999* -------- -------- -------- -------- ------ (DOLLARS IN MILLIONS) Earnings: Income (loss) from continuing operations before income taxes, extraordinary gain (loss) and cumulative effect of change in accounting principles............... $ 51.6 $ (877.4) $1,159.4 $1,106.1 $154.9 Add: Interest expense -- net................ 1,240.9 1,132.3 654.9 588.7 461.9 Rental expense representative of interest factor...................... 26.6 23.8 23.8 23.1 24.0 Minority interest in income and preferred returns of consolidated subsidiaries......................... 19.4 41.8 71.7 56.8 33.1 Interest accrued -- 50% owned companies............................ 4.8 3.2 9.0 8.7 7.5 Equity losses in less than 50% owned companies............................ 5.5 20.6 27.9 16.5 13.0 Other.................................. (.7) 18.5 6.6 _(8.7) (4.1) -------- -------- -------- -------- ------ Total earnings as adjusted plus fixed charges................... $1,348.1 $ 362.8 $1,953.3 $1,791.2 $690.3 ======== ======== ======== ======== ====== Fixed charges and preferred stock dividend requirements: Interest expense -- net................ $1,240.9 $1,132.3 $ 654.9 $ 588.7 $461.9 Capitalized interest................... 45.5 27.3 36.9 32.1 19.6 Rental expense representative of interest factor...................... 26.6 23.8 23.8 23.1 24.0 Pre-tax effect of our preferred stock dividend requirements................ 47.8 33.6 -- -- 5.1 Pre-tax effect of preferred returns of subsidiaries......................... -- 15.2 59.1 44.2 26.7 Interest accrued -- 50% owned company.............................. 4.8 3.2 9.0 8.7 7.5 -------- -------- -------- -------- ------ Combined fixed charges and preferred stock dividend requirements.................... $1,365.6 $1,235.4 $ 783.7 $ 696.8 $544.8 ======== ======== ======== ======== ====== Ratio of earnings to combined fixed charges and preferred stock dividend requirements.............................. (a) (a) 2.49 2.57 1.27 ======== ======== ======== ======== ====== </Table> - --------------- * Certain amounts have been restated or reclassified as described in Note 1 of Notes to Consolidated Financial Statements. (a) Earnings were inadequate to cover combined fixed charges and preferred stock dividend requirement by $17.5 million and $872.6 million for the years ended December 31, 2003 and 2002, respectively.