Charleston Collegiate School is accredited by the Southern Association of Independent Schools (SAIS) and the Southern Association of Colleges and Schools (SACS). The school and its faculty are members of:
Coalition of Essential Schools (CES)
Educational Records Bureau (ERB)
National Association for College Admission Counseling (NACAC)
National Association of Independent Schools (NAIS)
Palmetto Association of Independent Schools (PAIS)
South Carolina Independent School Association (SCISA)
Southern Association for College Admission Counseling (SACAC)
Southern Association of Colleges and Schools (SACS)
Southern Association of Independent Schools (SAIS)