How SAC fits with NIC
SAC classifies services for GST invoicing and service reporting. NIC classifies the economic activity behind the business. A service provider may use NIC for registration context and SAC for invoice or tax classification, so the two layers should be connected carefully and source-backed.
This hub is generated from the locally cached official CBIC source and connects services to adjacent NIC, NCO, HSN and education pathways where that helps classification decisions.