EXHIBIT 12 NETWORK PLUS CORP. COMPUTATION OF RATIOS RATIO OF EARNINGS TO COMBINED FIXED CHARGES Year Ended December 31, --------------------------------------------- 1994 1995 1996 1997 1998 -------- -------- -------- -------- --------- EARNINGS Net income (loss) before income taxes $3,019 $4,007 $1,475 $(3,149) $(5,289) Combined fixed charges 135 207 542 801 3,527 ------- ------- ------- -------- -------- Total Earnings $3,154 $4,214 $2,014 $(2,348) $(1,762) COMBINED FIXED CHARGES Interest expense 2 40 313 557 1,101 Preferred stock dividends and accretion of issuance costs and discounts - - - - 2,005 Interest portion of operating lease rentals 133 167 229 244 421 ------- ------- ------- -------- -------- Total Combined Fixed $ 135 $ 207 $ 542 $ 801 $ 3,527 Charges RATIO OF EARNINGS TO COMBINED FIXED CHARGES 23.4x 20.4x 3.7x (2.9)x (0.5)x