Exhibit 99.1 Contact: Chris Brandon Vice President, Investor Relations chris.brandon@jackinthebox.com 619.902.0269 Jack in the Box Inc. Reports Second Quarter 2024 Earnings Jack in the Box same-store sales of (2.5%); Del Taco same-store sales of (1.4%) Jack in the Box systemwide sales of (1.6%); Del Taco systemwide sales of (1.3%) Diluted EPS of $1.26; Operating EPS of $1.46 Jack in the Box restaurant level margin of 23.6%, up 2.2% from prior year Jack in the Box signed franchise development agreements in Q ...