1. Describe the activity plainly
Write what the business actually does in simple language: service, product, process, material or customer outcome. That input works better than guessing a code from memory.
The safest NIC workflow is activity first, hierarchy second, final code last.
Write what the business actually does in simple language: service, product, process, material or customer outcome. That input works better than guessing a code from memory.
Use NIC search to shortlist likely Sections and Divisions, then compare Groups and Classes before selecting a six-digit Sub-class.
Check sibling codes, not just the selected page. Nearby activity titles often reveal the boundary between two similar classifications.
Before using the result in a filing or registration workflow, confirm the final code against the official NIC 2025 source file and any relevant class note.