Back to all guides
GST & Compliance6 min read
Complete Guide to GST Invoicing Rules in India: Mandatory Fields & Formats
Written by CA Sandeep Sharma
•January 2026
Executive Summary:Everything Indian business owners need to know about Rule 46 of the CGST Act. Learn which 16 mandatory fields must be printed on every B2B and B2C invoice.
Understanding Key Regulatory & Operational Fundamentals
In the modern Indian retail and commercial ecosystem, maintaining strict adherence to regulatory rules while protecting cashflow and customer trust is essential. When handling everyday billing, inventories, and return filing, even minor oversights can lead to financial leakage or statutory penalties.
Critical Best Practices for Growing Businesses:
- Always ensure HSN/SAC codes and correct Place of Supply (PoS) are printed on every invoice.
- Reconcile your sales registers with purchase books and GSTR-2B before monthly return filing.
- Leverage automated desktop software to prevent manual human transcription and calculation mistakes.
How BillSalt Automates This Process
Rather than spending hours manually calculating tax splits, tracking inventory batches in physical bahi-khata registers, or manually generating challans, BillSalt automates these workflows out of the box:
- Automated HSN directory with updated GST tax slabs.
- One-click E-Way bill and E-Invoice generation for qualifying consignments.
- Real-time stock deduction, FEFO batch tracking, and low-inventory notifications.
- Zero-commission dynamic UPI QR code prints on thermal and laser paper.
Eliminate Manual Paperwork
Start Free TrialReady to automate your billing & compliance?
Start your free 14-day trial today. No credit card required.