The availability of Grad PLUS loans for the 2023-24 academic year typically opens around early to mid-spring of the preceding year. This timing allows students to apply for these loans in advance of the upcoming academic year. However, specific dates can vary, so it's essential to check with the U.S. Department of Education or your school's financial aid office for the most accurate and up-to-date information regarding the opening of the application period for Grad PLUS loans.