EXHIBIT 12 PENHALL INTERNATIONAL INC. AND SUBSIDIARIES RATIO OF EARNINGS TO FIXED CHARGES THREE MONTHS ENDED FISCAL YEARS SEPTEMBER 30, ------------------------------------------------------ --------------------- 1994 1995 1996 1997 1998 1997 1998 --------- --------- --------- ---------- --------- --------- ---------- Earnings (loss) before income taxes... $6,647,000 $8,315,000 $8,623,000 $ 9,864,000 $5,232,000 $3,536,000 $(8,522,000) Fixed charges--interest expense....... $ 399,000 $ 623,000 $ 919,000 $ 947,000 $1,204,000 $ 285,000 $ 2,663,000 ---------- ---------- ---------- ---------- ---------- ---------- ----------- $7,046,000 $8,938,000 $9,542,000 $10,811,000 $6,436,000 $3,621,000 $(5,859,000) ---------- ---------- ---------- ---------- ---------- ---------- ----------- ---------- ---------- ---------- ---------- ---------- ---------- ----------- Ratio of Earnings to Fixed Charges.... 17.7 to 1 14.3 to 1 10.4 to 1 11.4 to 1 5.3 to 1 13.4 to 1 -- (1) - ------------------------------ (1) The Company's earnings were insufficient to cover its fixed charges by $8,522,000.