The traditional Leaving Certificate subjects are:
- Irish
- English
- Mathematics
- History
- Geography
- French
- Physics
- Chemistry
- Biology
- Accounting
- Business Organisation
- Home Economics
- Art
- Music
- Construction Studies
- Engineering
- Design and Communication Graphics
All of these subjects, which are taken at both higher and ordinary levels, are subject to availability.
Generally, subjects taken at Leaving Certificate level must have been taken already for the Junior Certificate. However, if a student has attained a high enough level of aptitude in Transition Year, they may be allowed to study this subject at Leaving Cert level.