EXHIBIT 12 CABOT CORPORATION AND CONSOLIDATED SUBSIDIARIES STATEMENT REGARDING COMPUTATION OF RATIO OF EARNINGS (LOSS) TO FIXED CHARGES (Amounts in millions, except ratios) Years ended September 30 2005 2004 2003 2002 2001 ---- ---- ---- ---- ---- Earnings (Loss): Pre-tax income (loss) from continuing operations $(93) $164 $ 94 $134 $150 Distributed income of affiliated companies 3 2 3 3 11 Add fixed charges: Interest on indebtedness 29 30 28 28 32 Portion of rents representative of the interest factor 3 3 4 4 4 Preferred stock dividend 3 3 3 3 3 Income (loss) as adjusted $(55) $202 $132 $172 $200 Fixed charges: Interest on indebtedness $ 29 $ 30 $ 28 $ 28 $ 32 Capitalized interest 2 -- -- 2 1 Portion of rents representative of the interest factor 3 3 4 4 4 Preferred stock dividend 3 3 3 3 3 Total fixed charges $ 37 $ 36 $ 35 $ 37 $ 40 Ration of earnings (loss) to fixed charges (1) 6 4 5 5