EXHIBIT 12
 
                      UNITED RENTAL (NORTH AMERICA), INC.
 
         STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
 


                                                        Historical                                             Pro Forma
                             --------------------------------------------------------------------  ---------------------------------
                                                                                                         Year          Nine Months
                                                                                Nine Months Ended        Ended            Ended
                                        Year Ended December 31,                   September 30,       December 31,     September 30,
                             -------------------------------------------------  ------------------  --------------------------------
                                 1993     1994     1995     1996     1997        1997      1998          1997              1998
                                 ----     ----     ----     ----     ----        ----      ----          ----              ----
                                                                          (dollars in thousands)
                                                                                                
Earnings:                                                           
  Income before                                                     
   provision for income                                             
   taxes and extraordinary
   items................         $15,190  $26,025  $33,781  $38,146  $34,917     $17,225   $44,732       $34,917           $44,732
  Interest expense......           3,906    6,245    7,490   11,278   11,847       6,316    39,170        18,597            44,233
  Amortization of debt                                                
   issuance cost........                                27       78      124          67       684           124               684
  Interest portion of                                                 
   rent expense(1)......           1,164    1,239    1,358    1,514    2,305       1,480     6,540         2,305             6,540
                                 -------   ------   ------   ------   ------     -------   -------       -------           -------
     Earnings as                                                       
     adjusted...........         $20,260  $33,509  $42,656  $51,016  $49,193     $25,088   $91,126       $55,943           $96,189 
                                 =======  =======  =======  =======  =======     =======   =======       =======           =======
Fixed charges:                                                        
  Interest expense......         $ 3,906  $ 6,245  $ 7,490  $11,278  $11,847     $ 6,316   $39,170       $18,597           $44,233
  Amortization of debt                                                
   issuance cost........                                27       78      124          67       684           124               684
  Interest portion of                                                 
   rent expense(1)......           1,164    1,239    1,358    1,514    2,305       1,480     6,540         2,305             6,540
                                 -------   ------   ------   ------   ------     -------   -------       -------           -------
    Fixed charges.......         $ 5,070  $ 7,484  $ 8,875  $12,870  $14,276     $ 7,863   $46,394       $21,026           $51,457 
                                 =======  =======  =======  =======  =======     =======   =======       =======           =======
Ratio of earnings to                                                  
 fixed charges..........            4.0x     4.5x     4.8x     4.0x     3.4x        3.2x      2.0x          2.7x              1.9x

- --------

(1) The interest portion of rent expense is estimated to be one-third of rent
    expense.