
<PAGE>
 
Exhibit 11

ALLIN COMMUNICATIONS CORPORATION

CALCULATION OF NET LOSS PER COMMON SHARE

(Dollars in thousands, except per share data)

<TABLE>
<CAPTION>
                                                            Three Months       Three Months       Nine Months       Nine Months
                                                               Ended              Ended              Ended             Ended
                                                           September 30,       September 30,     September 30,      September 30,
                                                                1995              1996                1995             1996
<S>                                                        <C>                 <C>               <C>                <C>

Net loss                                                     $       (317)     $   (2,096)       $    (1,189)       $   (4,609)
                                                             ============      ==========        ===========        ==========
Net loss per common share                                    $      (0.13)     $    (0.81)       $     (0.46)       $    (1.77)
                                                             ============      ==========        ===========        ==========
                                                                                                                
Weighted average common shares outstanding                                                                      
     during the period (1)                                      2,400,000       2,400,000          2,400,000         2,400,000
                                                                                                                
Effective of conversion of preferred stock                                                                      
     issued within one year of the offering                       203,385         203,385            203,385           203,385
                                                             ------------      ----------        -----------        ----------
Shares used in calculating net loss per common                                                                  
     share                                                      2,603,385       2,603,385          2,603,385         2,603,385
                                                             ============      ==========        ===========        ==========
</TABLE>

(1)  The weighted average common shares outstanding has been retroactively
     restated for the effect of the 2,400 for 1 stock split.
