Enrolling in Classes
Last Updated: June 25, 2026 3:06:49 PM PDT
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Find information and links for enrolling in classes at UC San Diego.
Important news
Student enrollment continues with current systems for Summer Session 2026.
The new Triton Student System (TSS) is set to launch in July 2026, changing much of the information and processes set out below.
You'll log into TSS to book courses for Fall 2026. Watch your ucsd.edu email and this page for updated instructions.
Tools for enrolling in classes
Calendars:
- Quarterly Timeline With Deadlines
- Enrollment and Registration Calendar 2025-2026 (starting Fall 2025)
- Enrollment and Registration Calendars for other academic years
- Summer Session Calendar
Undergraduate enrollment:
- Enrollment Checklist
- What to Do Before Enrolling in Classes
- How to Enroll in Classes
- How to Add a Class
- How to Drop a Class
- How to Change a Grading Option or Number of Units per Class
- How to Wait-List a Class
- Special Enrollment: Part-time study, repeating a class, special studies, classes at other campuses, and UC Online
Graduate enrollment:
- Enrollment Checklist
- How to Add a Class
- How to Drop a Class
- How to Change a Grading Option or Number of Units per Class
- How to Wait-List a Class
- Special Enrollment: Half-time study, repeating a class, special studies, classes at other campuses, and UC Online
Special types of enrollment / transferring courses:
- Cross-Campus Enrollment (UC Online)
- How to Enroll in Classes Outside UCSD
- How to Enroll in Special Studies Classes
- Part-Time/ Half-Time Study
- Returning to UC San Diego After an Absence
- How to Repeat a Class
- Summer Session
- Transfer Courses
- Undergraduate Seminars
Textbooks:
Tool help:
Withdrawal:
Writing requirement:
If you have questions, contact:
- Your college
- Your department
- Registrar's Office, (858) 534-3150
- Summer Session