Exhibit 99.1

FOR IMMEDIATE RELEASE

Contact: M. Keith Waddell Vice Chairman, President and Chief Financial Officer (650) 234-6000

ROBERT HALF INTERNATIONAL INC. REPORTS REVENUES AND EARNINGS FOR THE FOURTH QUARTER OF 2008

MENLO PARK, California, January 28, 2009 — Robert Half International Inc. (NYSE symbol: RHI) today reported revenues and earnings for the fourth quarter ended December 31, 2008.

For the quarter ended December 31, 2008, net income was $39.0 million or $.26 per share, on revenues of $989.8 million. Net income for the prior year’s fourth quarter was $78.8 million or $.50 per share, on revenues of $1.22 billion.

For the year ended December 31, 2008, net income was $250.2 million or $1.63 per share, on revenues of $4.60 billion. For the year ended December 31, 2007, net income was $296.2 million or $1.81 per share, on revenues of $4.65 billion.

“Our financial results were impacted in North America and across the globe by very difficult labor markets, which weakened as the quarter progressed,” said Harold M. Messmer, Jr., chairman and chief executive officer of Robert Half International Inc. “We are faced with a great deal of economic uncertainty right now, but our financial condition remains solid, our competitive position remains strong, and our experienced field management team is both capable and determined. I am confident in their strength and experience as we navigate these rough waters.”

Robert Half International management will conduct a conference call today at 5 p.m. EST following the release. The dial-in number is 800-862-9098 (+1-785-424-1051 outside the United States) and the passcode is “Robert Half International.” A taped recording of this call will be available for replay beginning at approximately 8 p.m. EST today and ending at 8 p.m. EST on February 4. The dial-in number for the replay is 800-839-5685 (+1-402-220-2567 outside the United States). The conference call also will be archived in audio format on the company’s website at www.rhi.com.

Founded in 1948, Robert Half International Inc. is the world’s first and largest specialized staffing firm. It also is the parent company of Protiviti^®, a global consulting and internal audit firm composed of experts in risk and advisory services. Robert Half’s specialized staffing divisions include Accountemps^®, Robert Half^® Finance & Accounting and Robert Half^® Management Resources, for temporary, full-time and project professionals, respectively, in the fields of accounting and finance; OfficeTeam^®, for highly skilled temporary administrative support personnel; Robert Half^® Technology, for information technology professionals; Robert Half^® Legal, for legal personnel; and The Creative Group^®, for advertising, marketing and web design professionals.

Robert Half International has staffing and consulting operations in more than 400 locations worldwide.

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Certain information contained in this press release may be deemed forward-looking statements regarding events and financial trends that may affect the company’s future operating results or financial positions. These statements may be identified by words such as “estimate”, “forecast”, “project”, “plan”, “intend”, “believe”, “expect”, “anticipate”, or variations or negatives thereof, or by similar or comparable words or phrases. Forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from those expressed in the statements.

These risks and uncertainties include, but are not limited to, the following: the global financial and economic situation, changes in levels of unemployment and other economic conditions in the United States or foreign countries where the company does business, or in particular regions or industries; reduction in the supply of candidates for temporary employment or the company’s ability to attract candidates; the entry of new competitors into the marketplace or expansion by existing competitors; the ability of the company to maintain existing client relationships and attract new clients in the context of changing economic or competitive conditions; the impact of competitive pressures, including any change in the demand for the company’s services, on the company’s ability to maintain its margins; the possibility of the company incurring liability for its activities, including the activities of its temporary employees, or for events impacting its temporary employees on clients’ premises; the possibility that adverse publicity could impact the company’s ability to attract and retain clients and candidates; the success of the company in attracting, training, and retaining qualified management personnel and other staff employees; whether governments will impose additional regulations or licensing requirements on personnel services businesses in particular or on employer/employee relationships in general; whether there will be ongoing demand for Sarbanes-Oxley or other regulatory compliance services; and litigation relating to prior or current transactions or activities, including litigation that may be disclosed from time to time in the company’s SEC filings.

Additionally, with respect to Protiviti, other risks and uncertainties include the fact that future success will depend on its ability to retain employees and attract clients; there can be no assurance that there will be ongoing demand for Sarbanes-Oxley or other regulatory compliance services; failure to produce projected revenues could adversely affect financial results; and there is the possibility of involvement in litigation relating to prior or current transactions or activities.

Because long-term contracts are not a significant part of the company’s business, future results cannot be reliably predicted by considering past trends or extrapolating past results. The company undertakes no obligation to update information contained in this release.

A copy of this release is available at www.rhi.com.

ATTACHED: Summary of Operations   Supplemental Financial Information

ROBERT HALF INTERNATIONAL INC. AND SUBSIDIARIES

SUMMARY OF OPERATIONS

(in thousands, except per share amounts)

	Quarter Ended December 31,						Year Ended December 31,
	2008			2007			2008			2007
	(Unaudited)						(Unaudited)
Net service revenues	$	989,837		$	1,220,068		$	4,600,554		$	4,645,666
Direct costs of services		587,451			696,447			2,686,983			2,667,838
Gross margin		402,386			523,621			1,913,571			1,977,828
Selling, general and administrative expenses		334,895			393,911			1,496,839			1,497,957
Amortization of intangible assets		740			754			2,617			2,594
Interest income		(323	)		(2,912	)		(5,161	)		(13,127	)
Income before income taxes		67,074			131,868			419,276			490,404
Provision for income taxes		28,066			53,052			169,095			194,192
Net income	$	39,008		$	78,816		$	250,181		$	296,212
Diluted net income per share	$	.26		$	.50		$	1.63		$	1.81
Shares:
Basic		148,190			156,068			151,607			159,767
Diluted		149,496			158,459			153,289			163,479

ROBERT HALF INTERNATIONAL INC. AND SUBSIDIARIES

SUPPLEMENTAL FINANCIAL INFORMATION

(in thousands)

	Quarter Ended December 31,				Year Ended December 31,
	2008		2007		2008		2007
	(Unaudited)				(Unaudited)
REVENUES:
Accountemps	$	374,179	$	453,054	$	1,735,412	$	1,744,820
OfficeTeam		179,882		222,212		827,559		860,744
Robert Half Technology		101,360		110,841		437,477		425,086
Robert Half Management Resources		134,654		165,276		625,735		618,624
Robert Half Finance & Accounting		75,578		117,590		427,499		444,090
Protiviti		124,184		151,095		546,872		552,302
Total	$	989,837	$	1,220,068	$	4,600,554	$	4,645,666
GROSS MARGIN:
Temporary and consultant staffing	$	292,564	$	357,423	$	1,331,549	$	1,359,075
Permanent placement staffing		75,546		117,576		427,375		444,071
Risk consulting and internal audit services		34,276		48,622		154,647		174,682
Total	$	402,386	$	523,621	$	1,913,571	$	1,977,828
OPERATING INCOME:
Temporary and consultant staffing	$	63,421	$	98,925	$	348,963	$	372,892
Permanent placement staffing		2,589		21,906		60,482		86,109
Risk consulting and internal audit services		1,481		8,879		7,287		20,870
Total	$	67,491	$	129,710	$	416,732	$	479,871
SELECTED CASH FLOW INFORMATION:
Amortization of intangible assets	$	740	$	754	$	2,617	$	2,594
Depreciation expense	$	16,708	$	17,762	$	70,593	$	68,847
Capital expenditures	$	17,926	$	20,185	$	73,413	$	83,777
Open market repurchases of common stock (shares)		4,018		3,041		9,376		12,202

ROBERT HALF INTERNATIONAL INC. AND SUBSIDIARIES

SUPPLEMENTAL FINANCIAL INFORMATION

(in thousands)

	December 31,
	2008		2007
	(Unaudited)
SELECTED BALANCE SHEET INFORMATION:
Cash and cash equivalents	$	344,896	$	310,000
Accounts receivable, less allowances	$	484,808	$	593,169
Total assets	$	1,401,989	$	1,450,298
Current liabilities	$	402,991	$	447,952
Notes payable and other indebtedness, less current portion	$	1,892	$	3,753
Total stockholders’ equity	$	983,888	$	984,049