Entry to the Aga Khan Mzizima Secondary School is based on merit only, regardless of background. It is also competitive.

'O' Level Admissions
Each April, candidates apply for the 100 places in Grade 8. All applicants must have completed seven years of education up to Grade 7 at primary level. Shortlisted candidates must successfully complete an English and Mathematics entrance test and interview before being admitted. Grade 9 and 10 admissions are possible in June, depending on availability. Candidates sit for a similar entrance test and interview.

Mid-Term entry
Students applying for entry mid-way through the School Calendar will be admitted pending space availability, but must still meet entry requirements stipulated above.

'A' Level Admissions
Minimum entry for the 'A' Level Science stream is B, B, B and B, C, C for the Arts option. Shortlisted candidates who meet the academic requirements are interviewed before the final selection is made.

Admission for non-Tanzanian Students
Admission procedures are similar to those for Tanzanian students, but foreign students must complete the necessary immigration formalities and provide confirmation to the school administration before commencing studies.

Admission age (as at 1st June of the academic year):
Grade 8: 13 years (12 years for exceptionally bright students).