Tuition and mandatory student fees across the 23 campuses within the California State University system are largely standardized by the system's board of trustees for baseline state residents, meaning base instruction costs hover tightly around 5,700 to 7,500 dollars per year across most institutions. However, overall net costs vary slightly depending on localized campus fees set by individual universities. Generally, campuses located in regions with lower cost-of-living indices or smaller campus-wide fee structures offer the most affordable overall attendance bills.