1 EXHIBIT 12.1 HADCO CORPORATION COMPUTATION OF THE RATIO OF EARNINGS TO FIXED CHARGES The following table sets forth the ratio of earnings to fixed charges of Hadco Corporation for the period October 30, 1993 to May 2, 1998, including pro forma financial data. The ratio of earnings to fixed charges is computed by dividing net fixed charges (interest expense on all debt plus the interest portion of rent expense) into earnings before income taxes and fixed charges. Fiscal Year Ended, Six Months Ended, --------------------------------------------------------------------- ------------------------------------ Oct. 30, Oct. 29, Oct. 28, Oct. 26, Oct.25, Oct. 25, Apr.26, May 2, May 2, 1993 1994 1995 1996 1997 1997 1997 1998 1998 -------- -------- -------- -------- -------- ------------- -------- -------- -------------- (Pro Forma) (Pro Forma) Earnings before income taxes 12,941 $16,434 $35,038 $52,481 $(8,821) $61,113 $(46,424) $(37,426) $14,739 Interest expense, including interest portion of rental expense 1,402 891 537 338 10,923 27,544 5,251 6,294 12,083 Amortization of Debt Issuance Costs -- -- -- -- 5 -- 5 -- -- ------ ------- ------- ------- ------- ------- ------- -------- ------- Earnings before fixed charges 14,343 17,325 35,575 52,819 2,107 88,657 (41,168) (31,132) 26,822 ------ ------- ------- ------- ------- ------- ------- -------- ------- Fixed Charges: Interest expense, including interest portion of rental expense 1,402 891 537 338 10,923 27,544 5,251 6,294 12,083 Amortization of Debt Issuance Costs -- -- -- -- 5 -- 5 -- -- ------ ------- ------- ------- ------- ------- ------- -------- ------- Fixed charges 1,402 891 537 338 10,928 27,544 5,256 6,294 12,083 ------ ------- ------- ------- ------- ------- ------- -------- ------- Ratio of earnings to fixed charges 10.2x 19.4x 66.2x 156.3x 0.2x 3.2x -- -- 2.2x