Class
8421
Foreign affairs
UN Stats ISIC Rev. 5 reference hub with full hierarchy from section to class and direct links from SSIC crosswalk pages.
Official data
| Classification | ISIC Rev. 5 |
| Authority | United Nations Statistics Division (UNSD) |
| Purpose | UN Stats ISIC Rev. 5 reference hub with full hierarchy from section to class and direct links from SSIC crosswalk pages. |
| Published | Rev. 5 |
| Source | UNSD ISIC Rev. 5 |
Mapped from SSIC 2025
Mapped SSIC classes
SSIC hierarchy context
Related SSIC divisions
No division context found.
Related SSIC sections
No section context found.
Full SSIC mapping
Frequently asked questions
Where can I confirm the official definition?
The authoritative source is the SingStat SSIC 2025 detailed definitions workbook. This site mirrors that data but always verify against the original spreadsheet.
What ACRA filing obligations apply?
All registered business entities must file an Annual Return via BizFile+ within 7 months of their Financial Year End. Companies must also file annual tax returns with IRAS.
Can I register this code as a secondary SSIC?
ACRA allows up to two SSIC codes per registered entity: one primary and one secondary. Use the code that best describes the core economic activity first.
What happens if I choose the wrong SSIC code?
Using an incorrect SSIC may delay regulatory approvals, cause incorrect tax treatment, or affect eligibility for grants. Codes can be updated via BizFile+.
What is SSIC and why does it matter?
The Singapore Standard Industrial Classification (SSIC) is the national system for categorising business activities. It is mandatory at ACRA registration and is used by IRAS, MOM, and other government agencies for tax, licensing, statistical, and policy purposes.
Do I need to register with this SSIC code?
Every business entity registered with ACRA must select at least one SSIC code that best describes its principal economic activity. You can declare up to two codes — one primary and one secondary — via BizFile+.
Official sources
What to do next
Sibling classes
Data source: United Nations Statistics Division (https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/ISIC_Rev_5_english_structure.xlsx). ISIC Rev. 5 structure mirrored from official UN XLSX.
Version: ISIC Rev. 5.