EXHIBIT 12 COMPUTATION OF RATIO OF NET INCOME TO FIXED CHARGES AND NET INCOME TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS FOR NINE MONTHS ENDED SEPTEMBER 30 (UNAUDITED) <Table> <Caption> (Dollars in millions) 2001 2000 ---- ---- Income before income taxes (1) $7,684 $7,711 Add: Fixed charges, excluding capitalized interest 1,314 1,379 ------ ------ Income as adjusted before income taxes $8,998 $9,090 ====== ====== Fixed charges: Interest expense $ 973 $1,050 Capitalized interest 24 23 Portion of rental expense representative of interest 341 329 ------ ------ Total fixed charges $1,338 $1,402 ====== ====== Preferred stock dividends (2) 14 21 ------ ------ Combined fixed charges and preferred stock dividends $1,352 $1,423 ====== ====== Ratio of net income to fixed charges 6.72 6.48 Ratio of net income to combined fixed charges and preferred stock dividends 6.66 6.39 </Table> (1) Income before income taxes excludes the company's share in the income and losses of less-than-fifty percent-owned affiliates. (2) Included in the ratio computation are preferred stock dividends of $10 million for the first nine months of 2001 and $15 million for the first nine months of 2000, or $14 million and $21 million, respectively, representing the pre-tax income that would be required to cover those dividend requirements based on the company's effective tax rate for the nine months ended September 30, 2001 and 2000. - 26 - <Page> SEGMENT INFORMATION (UNAUDITED) <Table> <Caption> Hardware Segments ------------------------------------------------- Personal and Global Printing Enterprise (Dollars in millions) Services Technology Systems Systems - ------------------------------------------------------------------------------------------------------------- THREE MONTHS ENDED SEPTEMBER 30, 2001: External revenue $8,682 $ 1,654 $ 2,829 $ 3,056 Internal revenue 684 628 18 175 ------ ------- ------- ------- Total revenue $9,366 $ 2,282 $ 2,847 $ 3,231 ====== ======= ======= ======= Pre-tax income (loss) $1,373 $ (258) $ (70) $ 194 ====== ======= ======= ======= Revenue year-to-year change 5.4% (21.9)% (28.7)% (2.2)% Pre-tax income year-to-year change 19.7% (242.5)% (179.5)% (29.2)% Pre-tax income margin 14.7% (11.3)% (2.5)% 6.0% THREE MONTHS ENDED SEPTEMBER 30, 2000*: External revenue $8,230 $ 2,250 $ 3,971 $ 3,164 Internal revenue 654 672 22 138 ------ ------- ------- ------- Total revenue $8,884 $ 2,922 $ 3,993 $ 3,302 ====== ======= ======= ======= Pre-tax income (loss) $1,147 $ 181 $ 88 $ 274 ====== ======= ======= ======= Pre-tax income margin 12.9% 6.2% 2.2% 8.3% </Table> * Reclassified to conform with 2001 presentation. RECONCILIATIONS TO IBM AS REPORTED: <Table> <Caption> Three Months Ended Three Months Ended (Dollars in millions) September 30, 2001 September 30, 2000 ------------------ ------------------- Revenue: Total reportable segments $ 22,424 $ 23,601 Eliminations/other (1,996) (1,820) -------- -------- Total IBM Consolidated $ 20,428 $ 21,781 ======== ======== Pretax income: Total reportable segments $ 2,181 $ 2,444 Eliminations/other 81 360 -------- -------- Total IBM Consolidated $ 2,262 $ 2,804 ======== ======== </Table> - 27 - <Page> <Table> <Caption> Global Enterprise Total (Dollars in millions) Software Financing Investments Segments - -------------------------------------------------------------------------------------------------------------------- THREE MONTHS ENDED SEPTEMBER 30, 2001: External revenue $ 3,201 $ 814 $ 242 $ 20,478 Internal revenue 236 204 1 1,946 ---------- ------- ----- -------- Total revenue $ 3,437 $ 1,018 $ 243 $ 22,424 ========== ======= ===== ======== Pre-tax income (loss) $ 704 $ 314 $ (76) $ 2,181 ========== ======= ===== ======== Revenue year-to-year change 9.8% (6.9)% (12.6)% (5.0)% Pre-tax income year-to-year change 36.7% 6.8% (38.2)% (10.8)% Pre-tax income margin 20.5% 30.8% (31.3)% 9.7% THREE MONTHS ENDED SEPTEMBER 30, 2000*: External revenue $ 2,918 $ 868 $ 277 $ 21,678 Internal revenue 211 225 1 1,923 ---------- ------- ----- -------- Total revenue $ 3,129 $ 1,093 $ 278 $ 23,601 ========== ======= ===== ======== Pre-tax income (loss) $ 515 $ 294 $ (55) $ 2,444 ========== ======= ===== ======== Pre-tax income margin 16.5% 26.9% (19.8%) 10.4% </Table> - 28 - <Page> SEGMENT INFORMATION (UNAUDITED) <Table> <Caption> Hardware Segments ------------------------------------------------- Personal and Global Printing Enterprise (Dollars in millions) Services Technology Systems Systems - ------------------------------------------------------------------------------------------------------------- NINE MONTHS ENDED SEPTEMBER 30, 2001: External revenue $25,895 $ 6,091 $ 9,072 $ 9,669 Internal revenue 1,923 1,795 50 547 ------- ------- -------- ------- Total revenue $27,818 $ 7,886 $ 9,122 $10,216 ======= ======= ======== ======= Pre-tax income (loss) $ 3,748 $ (81) $ (136) $ 1,111 ======= ======= ======== ======= Revenue year-to-year change 7.8% (1.4)% (16.0)% 2.4% Pre-tax income year-to-year change 16.6% (120.9)% nm 6.3% Pre-tax income margin 13.5% (1.0)% (1.5)% 10.9% NINE MONTHS ENDED SEPTEMBER 30, 2000*: External revenue $23,966 $ 5,826 $ 10,820 $ 9,500 Internal revenue 1,849 2,172 44 475 ------- ------- -------- ------- Total revenue $25,815 $ 7,998 $ 10,864 $ 9,975 ======= ======= ======== ======= Pre-tax income (loss) $ 3,214 $ 388 $ (4) $ 1,045 ======= ======= ======== ======= Pre-tax income margin 12.5% 4.9% (0.0)% 10.5% </Table> nm - not meaningful * Reclassified to conform with 2001 presentation. RECONCILIATIONS TO IBM AS REPORTED: <Table> <Caption> Nine Months Ended Nine Months Ended (Dollars in millions) September 30, 2001 September 30, 2000 ------------------ ------------------- Revenue: Total reportable segments $ 68,800 $ 68,436 Eliminations/other (5,760) (5,656) -------- -------- Total IBM Consolidated $ 63,040 $ 62,780 ======== ======== Pretax income: Total reportable segments $ 7 ,278 $ 7,153 Eliminations/other 375 594 -------- -------- Total IBM Consolidated $ 7,653 $ 7,747 ======== ======== </Table> - 29 - <Page> <Table> <Caption> Global Enterprise Total (Dollars in millions) Software Financing Investments Segments - ----------------------------------------------------------------------------------------------------------------------- NINE MONTHS ENDED SEPTEMBER 30, 2001: External revenue $ 9,155 $ 2,486 $ 782 $63,150 Internal revenue 686 647 2 5,650 --------- ------- ----- ------- Total revenue $ 9,841 $ 3,133 $ 784 $68,800 ========= ======= ===== ======= Pre-tax income (loss) $ 2,001 $ 878 $(243) $ 7,278 ========= ======= ===== ======= Revenue year-to-year change 2.3% (2.7)% (16.8)% 0.5% Pre-tax income year-to-year change 9.2% (1.1)% (15.7)% 1.7% Pre-tax income margin 20.3% 28.0% (31.0)% 10.6% NINE MONTHS ENDED SEPTEMBER 30, 2000*: External revenue $ 9,027 $ 2,525 $ 939 $62,603 Internal revenue 595 695 3 5,833 --------- ------- ----- ------- Total revenue $ 9,622 $ 3,220 $ 942 $68,436 ========= ======= ===== ======= Pre-tax income (loss) $ 1,832 $ 888 $(210) $ 7,153 ========= ======= ===== ======= Pre-tax income margin 19.0% 27.6% (22.3)% 10.5% </Table> - 30 -