GST Invoicing Requirements for Indian Businesses

Under the Indian Goods and Services Tax (GST) system, issuing a valid tax invoice is critical to ensure that your business stays compliant and your clients can claim input tax credit (ITC). Our free GST invoice generator is tailored specifically to make it easy to input GSTINs and HSN/SAC codes, automatically managing CGST/SGST/IGST tax splits.

Understanding Intrastate vs. Interstate Supplies

Taxes are split dynamically based on the location of supply compared to your business registration location:

• Intrastate Supply (Same State): Calculated using CGST (Central GST) and SGST (State GST) split equally (e.g., an 18% GST rate splits into 9% CGST and 9% SGST).
• Interstate Supply (Different State): Calculated using IGST (Integrated GST) in full (e.g., 18% IGST is applied directly to the invoice).

Why is HSN/SAC Code Required?

HSN (Harmonized System of Nomenclature) codes for goods and SAC (Services Accounting Code) for services are mandatory on tax invoices in India. They standardize goods and services classification for tax collection. Use our free tool to add these per-row codes and create fully compliant PDFs, or sign up for an Invoees account to save client databases, automate quotation structures, and access complete business analytics.