1
                                                                      EXHIBIT 12


             INTEGRATED ELECTRICAL SERVICES, INC. AND SUBSIDIARIES
                       RATIO OF EARNINGS TO FIXED CHARGES
                           (IN THOUSANDS OF DOLLARS)





                                                                     Nine Months      Year Ended            Six Months Ended
                                     Years Ended December 31,           Ended         September 30,             March 31,
                               ------------------------------------ September 30, ---------------------- -----------------------
                                  1994         1995          1996       1997         1997        1998       1998        1999
                               -----------  -----------  ---------- ------------  ----------  ---------- ----------- -----------
                                                                                             
CONSOLIDATED
Earnings:
   Income before income
      taxes . . . . . . . . .    $   712      $ 1,549      $  6,136   $ 6,143       $ 7,298     $12,638   $(12,570)     $32,793
   Fixed charges  . . . . . .        249          325           223       251           283       2,486        227        5,588
                                 -------      -------      --------   -------       -------     -------   --------      -------
                                 $   961      $ 1,874      $  6,359   $ 6,394       $ 7,581     $15,124   $(12,343)     $38,381
                                 =======      =======      ========   =======       =======     =======   ========      =======

Fixed Charges:
   Interest expense . . . . .    $   172      $   286      $    171   $   164       $   214     $ 1,161   $     59      $ 4,923
   Portion of rental cost
      representing interest .         77           39            52        87            69       1,325        168          665
                                 -------      -------      --------   -------       -------     -------   --------      -------
                                 $   249      $   325      $    223   $   251       $   283     $ 2,486   $    227      $ 5,588
                                 =======      =======      ========   =======       =======     =======   ========      =======
Ratio of earnings to fixed
   charges  . . . . . . . . .        3.9x         5.8x         28.5x     25.5x         26.8x        6.1x       -- x         6.9x
                                 =======      =======      ========   =======       =======     =======   ========      =======

PRO FORMA:
Earnings:
   Income before income
      taxes . . . . . . . . .                                                                   $83,951                $35,534
   Fixed charges  . . . . . .                                                                     6,095                  5,769
                                                                                                -------                -------
                                                                                                $90,046                $41,303
                                                                                                =======                =======
Fixed Charges:
   Interest expense . . . . .                                                                   $ 4,292                $ 4,923
   Portion of rental cost
      representing interest .                                                                     1,803                    846
                                                                                                -------                -------
                                                                                                $ 6,095                $ 5,769
                                                                                                =======                =======
Ratio of earnings to fixed
   charges  . . . . . . . . .                                                                      14.8x                   7.2x
                                                                                                =======                =======

PRO FORMA AS ADJUSTED:
Earnings:
   Income before income
      taxes . . . . . . . . .                                                                   $72,714                $32,848
   Fixed charges  . . . . . .                                                                    17,332                  8,455
                                                                                                -------                -------
                                                                                                $90,046                $41,303
                                                                                                =======                =======
Fixed Charges:
   Interest expense . . . . .                                                                   $15,529                $ 7,609
   Portion of rental cost
      representing interest .                                                                     1,803                    846
                                                                                                -------                -------
                                                                                                $17,332                $ 8,455
                                                                                                =======                =======
Ratio of earnings to fixed
   charges  . . . . . . . . .                                                                       5.2x                   4.9x
                                                                                                =======                =======