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.