EXHIBIT 99.1


                                                              [ADMINISTAFF LOGO]
                                                              ------------------
                                                                    News Release

INVESTOR RELATIONS CONTACT:
   Richard G. Rawson
   Executive Vice President and Chief Financial Officer
   (281) 348-3225
   richard_rawson@administaff.com

NEWS MEDIA CONTACT:
   Alan Dodd
   Director, Corporate Communications
   (281) 348-3105
   alan_dodd@administaff.com


                   ADMINISTAFF ANNOUNCES FIRST QUARTER RESULTS
                         o  REVENUES INCREASE 15%
                         o  GROSS PROFIT INCREASES 18%
                         o  NET LOSS CONSISTENT WITH HISTORICAL FIRST
                            QUARTER PATTERN

HOUSTON - May 1, 2003 - Administaff, Inc. (NYSE: ASF), the nation's leading
Professional Employer Organization, today announced results for the first
quarter ended March 31, 2003. From its continuing operations, the company
reported a first quarter net loss and a diluted net loss per share of $4.1
million and $0.15, versus a loss of $5.4 million and $0.19 in the 2002 period.
The company reported a net loss from its discontinued operations of an
additional $0.01 per share in both periods. Historically, the company's earnings
pattern has included losses in the first quarter, followed by improved
profitability in subsequent quarters throughout the year. This pattern is due to
the effects of employment-related taxes that are based on each employee's
cumulative earnings up to specified wage levels, causing employment-related
taxes to be highest in the first quarter and then decline over the course of the
year.

Revenues for the first quarter of 2003 increased to $225.5 million, an increase
of 15.1% over the 2002 period. This increase was due to a 10.7% increase in
revenue per worksite employee per month and a 4.0% increase in the average
number of paid worksite employees per month. Gross profit increased 18.2% to
$36.0 million compared to the first quarter of 2002. The average gross profit
per worksite employee per month increased 13.8% to $157 per month in the 2003
period, versus $138 per month in the 2002 period. These results reflect
increases of $53 in benefits costs, $13 in workers' compensation costs, and $10
in payroll taxes and other direct costs per worksite employee per month, which
were exceeded by an increase in the revenue per worksite employee per month of
$95.

"Now that we have successfully matched pricing with direct costs for two
consecutive quarters, we are focused on regaining our sales momentum and growing
our core business," said Paul J.


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Sarvadi, president and chief executive officer. "We expect increasing sales
activity combined with moderating price increases during the second quarter to
lead to improvement in new sales and client retention during the third and
fourth quarters."

Operating expenses increased 6.1% over the 2002 period to $42.5 million. On a
per worksite employee basis, operating expenses increased $4 per month, from
$182 to $186. The operating loss for the first quarter of 2003 was $6.6 million,
compared to $9.7 million in the 2002 period. On a per worksite employee basis,
the operating loss improved to $29 per month compared to $44 per month for the
first quarter of 2002.

"Although we experienced a sequential decline in worksite employees during the
quarter, the impact to gross profit was more than offset by strong pricing for
both new and renewing clients," said Richard G. Rawson, executive vice president
of administration and chief financial officer. "In addition, our plan to control
rising healthcare insurance costs through benefit plan design changes initiated
in January contributed to these positive results."

Other Matters

o    Share repurchase program expanded. During the quarter, Administaff
     announced that the company's board of directors had authorized the
     repurchase of up to one million additional shares of the company's
     outstanding common stock, bringing the total amount authorized under the
     program to six million shares. Administaff has repurchased a total of
     5,341,523 shares since 1999.

o    American Express transaction. The company repurchased 1,286,252 shares of
     the company's common stock from American Express Travel Related Services
     Company ("American Express") at a price of $6.00 per share. Concurrent with
     the repurchase, the companies agreed to extend their joint marketing
     agreement through 2006 for all new Administaff markets opened by the end of
     2005.

o    Open market purchase. The company repurchased 87,000 shares in the open
     market under the company's share repurchase program at an average price of
     $5.93 per share.

Administaff will be hosting a conference call today at 11:00 a.m. EDT to discuss
the quarterly results and business trends, and answer questions from investment
analysts. To listen in, call 800-299-0148 and use passcode 767994. The call will
also be webcast at www.administaff.com. To access the webcast, click on the
Investor Relations section of the website and select "Live Webcast." The
conference call script will be available at the same website later today. A
replay of the conference call will be available at 888-286-8010, passcode
9092088, for two weeks after the call. The webcast will be archived for one
year.

Administaff is a leading personnel management company that serves as a
full-service human resources department for small and medium-sized businesses
throughout the United States. The company operates 38 sales offices in 21 major
markets. For additional information, visit Administaff's web site at
www.administaff.com.

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(Note: The statements contained in this press release that are not historical
facts are forward-looking statements that involve a number of risks and
uncertainties. Therefore, the actual results of future events described in such
forward-looking statements could differ materially from those stated in such
forward-looking statements. Among the factors that could cause actual results to
differ materially are: (i) changes in general economic conditions; (ii)
regulatory and tax developments, including, but not limited to, the computation
of the final official unemployment tax rate for 2002 from the State of Texas,
Administaff's ability to comply with Revenue Procedure 2002-21, and possible
adverse application of various federal, state and local regulations; (iii)
changes in Administaff's direct costs and operating expenses, including, but not
limited to, increases in health insurance premiums, increases in underlying
health insurance claims trends, workers' compensation rates and state
unemployment tax rates, liabilities for employee and client actions or
payroll-related claims, changes in the costs of expanding into new markets, and
failure to manage growth of Administaff's operations; (iv) the estimated costs
and effectiveness of capital projects and investments in technology and
infrastructure, including Administaff's ability to maintain adequate financing
for such projects; (v) Administaff's ability to effectively implement its 401(k)
recordkeeping services; (vi) the effectiveness of Administaff's sales and
marketing efforts, including the company's marketing arrangements with other
companies; (vii) the failure to sell Administaff Financial Management Services,
Inc.; (viii) changes in the competitive environment in the Professional Employer
Organization industry; (ix) Administaff's liability for worksite employee
payroll and benefits costs; and (x) an adverse final judgment or settlement in
the Aetna lawsuit. These factors are described in further detail in
Administaff's filings with the Securities and Exchange Commission.)


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                                ADMINISTAFF, INC.
                          SUMMARY FINANCIAL INFORMATION
          (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS AND STATISTICAL DATA)
                                   (UNAUDITED)

<Table>
<Caption>
                                                                           THREE MONTHS ENDED
                                                                                MARCH 31,
                                                                       2003                   2002                CHANGE
                                                                       ----                   ----                ------
                                                                                                         
Operating results:
   Revenues (gross billings of $1.2 billion and $1.1
     billion less worksite employee payroll cost of
     $971 million and $953 million, respectively)                  $    225,520           $    195,958              15.1%
   Direct costs:
     Payroll taxes, benefits and workers'
       compensation costs                                               189,539                165,505              14.5%
                                                                   ------------           ------------
   Gross profit                                                          35,981                 30,453              18.2%
   Operating expenses:
     Salaries, wages and payroll taxes                                   20,344                 18,498              10.0%
     General and administrative expenses                                 11,704                 11,829              (1.1)%
     Commissions                                                          2,886                  3,141              (8.1)%
     Advertising                                                          2,210                  1,620              36.4%
     Depreciation and amortization                                        5,405                  5,016               7.8%
                                                                   ------------           ------------
   Total operating expenses                                              42,549                 40,104               6.1%
                                                                   ------------           ------------
   Operating loss                                                        (6,568)                (9,651)             31.9%
   Other income (expense):
      Interest income                                                       315                    735             (57.1)%
      Interest expense                                                     (568)                    --
      Other, net                                                              8                    (44)
                                                                   ------------           ------------
   Loss before income tax benefit                                        (6,813)                (8,960)             24.0%
   Income tax benefit                                                     2,691                  3,539             (24.0)%
                                                                   ------------           ------------
   Net loss from continuing operations                                   (4,122)                (5,421)             24.0%
   Discontinued operations:
     Loss from operations of discontinued division                         (396)                  (467)             15.2%
     Income tax benefit                                                     157                    184             (14.7)%
                                                                   ------------           ------------
     Loss on discontinued operations                                       (239)                  (283)             15.5%
   Net loss                                                        $     (4,361)          $     (5,704)             23.5%
                                                                   ============           ============
   Basic and diluted net loss per share of common stock:
     Loss from continuing operations                               $      (0.15)          $      (0.19)             21.1%
     Loss from discontinued operations                                    (0.01)                 (0.01)              --
                                                                   ------------           ------------
     Net loss                                                      $      (0.16)          $      (0.20)             20.0%
                                                                   ============           ============
   Basic and diluted weighted average
     common shares outstanding                                           27,427                 27,946
</Table>

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                               ADMINISTAFF, INC.
                   SUMMARY FINANCIAL INFORMATION (CONTINUED)
         (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS AND STATISTICAL DATA)
                                  (UNAUDITED)


<Table>
<Caption>
                                                                            THREE MONTHS ENDED
                                                                                MARCH 31,
                                                                         2003                2002           CHANGE
                                                                         ----                ----           ------
                                                                                                   
Statistical data:
   Average number of worksite employees paid per month                   76,425              73,488            4.0%
   Revenues per worksite employee per month                           $     984          $      889           10.7%
   Gross profit per worksite employee per month                             157                 138           13.8%
   Operating expenses per worksite employee per month                       186                 182            2.2%
   Operating loss per worksite employee per month                           (29)                (44)          34.1%
   Net loss from continuing operations per
     worksite employee per month                                            (18)                (25)          28.0%
</Table>


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                               ADMINISTAFF, INC.
                   SUMMARY FINANCIAL INFORMATION (CONTINUED)
         (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS AND STATISTICAL DATA)

<Table>
<Caption>
                                                                       MARCH 31,            DECEMBER 31,
                                                                         2003                   2002
                                                                      -----------           ------------
                                                                      (UNAUDITED)
                                                                                      
Assets
      Cash and cash equivalents                                       $    56,406            $    71,799
      Marketable securities                                                18,026                 14,714
      Accounts receivable                                                  86,756                 82,475
      Prepaid expenses and other current assets                            18,705                 22,535
      Deferred income taxes                                                   750                    641
      Income tax receivable                                                 2,151                     --
      Operations held for sale                                              1,250                  1,282
                                                                      -----------            -----------
           Total current assets                                           184,044                193,446

      Property and equipment                                              154,317                153,173
      Accumulated depreciation                                            (67,314)               (62,078)
                                                                      ------------           -----------
           Net property and equipment                                      87,003                 91,095

      Deposits                                                             26,379                 26,552
      Other assets                                                          3,865                  4,071
                                                                      -----------            -----------
           Total assets                                               $   301,291            $   315,164
                                                                      ===========            ===========

Liabilities and Stockholders' Equity
      Accounts payable                                                $     1,792            $     3,069
      Payroll taxes and other payroll deductions payable                   52,287                 57,196
      Accrued worksite employee payroll expense                            76,876                 69,676
      Accrued health insurance costs                                        5,091                  5,815
      Other accrued liabilities                                            12,439                 13,034
      Income taxes payable                                                     --                    348
      Current portion of long-term debt                                     1,793                  1,676
      Operations held for sale                                                113                    112
                                                                      -----------            -----------
           Total current liabilities                                      150,391                150,926

      Long-term debt                                                       41,927                 42,493
      Deferred income taxes                                                 5,042                  5,396
                                                                      -----------            -----------
           Total noncurrent liabilities                                    46,969                 47,889

      Stockholders' equity:
      Common stock                                                            309                    309
      Additional paid-in capital                                          102,020                102,315
      Treasury stock, cost                                                (50,730)               (43,003)
      Accumulated other comprehensive income, net of tax                      118                    153
      Retained earnings                                                    52,214                 56,575
                                                                      -----------            -----------
           Total stockholders' equity                                     103,931                116,349
                                                                      -----------            -----------
           Total liabilities and stockholders' equity                 $   301,291            $   315,164
                                                                      ===========            ===========
</Table>

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