1
                                               Filed Pursuant to Rule 424(b)(3)
                                                  Registration Number 333-50031

   PROSPECTUS SUPPLEMENT DATED MAY 15, 1998 TO PROSPECTUS DATED APRIL 30, 1998

      Integrated Electrical Services, Inc. reported operating results for the
six and three months ended March 31, 1998 as follows:

            INTEGRATED ELECTRICAL SERVICES, INC. PRO FORMA COMBINED
                         SUMMARY RESULTS OF OPERATIONS
               (Dollars in Thousands, Except Per Share Amounts)
                                  (Unaudited)

Six Months Ended Three Months Ended March 31, March 31, ------------------------- ------------------------- 1997 1998 1997 1998 ----------- ----------- ----------- ----------- Revenue ............................... $ 147,506 $ 173,363 $ 71,128 $ 87,021 Gross profit .......................... 31,962 38,460 14,277 19,258 Operating income ...................... 11,919 15,661 5,264 8,092 Income before taxes ................... 11,791 15,480 5,187 8,157 Net income ............................ 6,515 8,744 2,862 4,652 Earnings per share .................... $ 0.27 $ 0.36 $ 0.12 $ 0.19 Shares used in pro forma computation of earnings per share ............... 24,415,336 24,415,336 24,415,336 24,415,336
INTEGRATED ELECTRICAL SERVICES, INC. CONSOLIDATED SUMMARY RESULTS OF OPERATIONS (Dollars in Thousands, Except Per Share Amounts) (Unaudited)
Six Months Ended Three Months Ended March 31, March 31, --------------------------- --------------------------- 1997 1998 1997 1998 ------------ ------------ ------------ ------------ Revenue ................................... $ 33,568 $ 89,907 $ 16,137 $ 66,056 Gross profit .............................. 7,309 19,713 3,055 14,553 Non-cash non-recurring compensation charge in connection with the Acquisitions ..... -- 17,036 -- 17,036 Operating income (loss) ................... 1,758 (14,237) 910 (12,273) Income (loss) before taxes ................ 1,750 (14,136) 901 (12,154) Net income (loss) ......................... 981 (15,462) 522 (14,300) Earnings per share ........................ $ 0.29 $ (1.51) $ 0.16 $ (0.84) Shares used in computation of earnings per share ............................... 3,352,039 10,226,953 3,352,039 17,101,867
Total pro forma combined revenues for the six months ended March 31, 1998 rose 17.6% to $173.4 million from $147.5 million for the comparable period of fiscal 1997. Pro forma combined operating income for the first six months of 1998 grew to $15.7 million, a 31.9% increase over the $11.9 million reported in the same period last year. Pro forma combined net income for the six-month period increased to $8.7 million, or $0.36 per diluted share, versus $6.5 million, or $0.27 per diluted share, reported for the first six months of fiscal 1997, representing a 33.3% increase in earnings per diluted share. Total pro forma combined revenues for the second quarter of fiscal 1998 were $87.0 million, a 22.4% increase over the $71.1 million reported in the comparable quarter last year. Pro forma combined operating income rose 52.8% to $8.1 million from $5.3 million in the second quarter last year. Pro forma combined net income for the quarter grew to $4.7 million, or $0.19 per diluted share, a 58.3% increase in earnings per diluted share over the pro forma combined net income of $2.9 million, or $0.12 per diluted share, for the second quarter of fiscal 1997.