FOR IMMEDIATE RELEASE Exhibit 99.1 Contact: M. Keith Waddell President and Chief Executive Officer (650) 234-6000 ROBERT HALF REPORTS SECOND-QUARTER FINANCIAL RESULTS MENLO PARK, Calif., July 23, 2025 — Robert Half Inc. (NYSE symbol: RHI) today reported revenues and earnings for the second quarter ended June 30, 2025. For the three months ended June 30, 2025, net income was $41 million, or$0.41 per share, on revenues of $1.370 billion. For the three months ended June 30, 2024, net income was$68 million, o ...