• Applicants under the age of 13 must obtain approval from a parent/guardian before applying
  • Do not send any documentation via e-mail 
  • All financial aid documentation must be mailed to the Statewide Office, see address here
  • Black out social security numbers on all documentation sent into Statewide


  • Payment transactions can be made by check, money order, or credit card.
  • All checks and money orders must be addressed to 'UC Regents' (not COSMOS). Credit card payments can be made through the COSMOS application website. To do so, login to your account and click on the "Online Payment" tab. Charge will note ‘UC Davis’ for all campus applications.
  • A 2.85% credit card fees applies to all credit card transactions in order to cover the expenses of the service.
  • Please print the applicant name and COSMOS program (i.e. UCSD) on the memo line of check or money order. 

Students attending high school in California are considered in-state applicants; this includes high school students who have AB540 or DACA status.  Additionally, students attending boarding school outside of California but who have permanent residence (parents/guardians pay CA taxes) can be considered in-state.  Due to the complexity of this issue, if you have questions please contact Statewide directly.

Due to the high demand for participation in COSMOS, students who have already attended any COSMOS program are not eligible to apply again. Once a student has accepted admission by paying the $200 deposit to secure a place, the student is considered as attending that program.

If you foresee a problem or issue with having your student's tuition paid in full on time, please contact the COSMOS Statewide Office as soon as possible. Failure to pay your tuition before the deadline without contacting our office with a legitimate issue or concern will be considered a forfeiture of your COSMOS acceptance, and we will permanently revoke your offer of admission.

Application fee ($30) and tuition deposit ($200) are non-refundable

Direct all tuition refund requests to the COSMOS Statewide Office ( The COSMOS refund schedule for justifiable cancelled attendance is as follows:

In case you are admitted from a waitlist, a one-week period will be given to decide on acceptance and payment of non-refundable deposit. Tuition & Refund Policy still apply, unless Tuition Payment deadline has passed. Refund payments shall be issued to the party who paid the tuition payment. A refund will take up to 90 days to process.

By attending a public event on a UC campus (California State Summer School for Mathematics & Science, "COSMOS"), you give your permission for the University of California ("UC"), to videotape, audiotape, photograph, record, edit or otherwise reproduce your child(s) voice, image or likeness, and to use it in various formats and for the purposes within UC's mission of teaching, research, public service and patient care. Distribution methods may include, but are not limited to the classroom, television (including UCTV, broadcast, cable, and satellite), the Internet (including webcasts and podcasts), print publications or any other medium now existing or later created. UC retains the right not to use the footage for other than archival purposes.

Each campus may have additional policies, view their website and admissions offer, so you are aware of the details.

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