Everything about GST tax invoices. Detailed breakdown of GSTIN, HSN/SAC codes, CGST vs SGST vs IGST calculation rules, and free compliant templates.
What Is a GST Invoice?
A GST invoice is a legal bill issued by a registered taxpayer in India upon selling goods or services. It documents the transaction details and explicit tax breakdowns (CGST, SGST, IGST) required for claiming Input Tax Credit (ITC).
CGST, SGST, and IGST — Tax Breakdown Rules
| Transaction Type | Applicable Taxes | Tax Calculation |
|---|---|---|
| Intra-State (Same State) | CGST + SGST | Divided equally (e.g. 18% GST = 9% CGST + 9% SGST) |
| Inter-State (Different State) | IGST | Full rate applied as IGST (e.g. 18% IGST) |
| Export / SEZ Supply | Zero-Rated IGST | 0% GST with LUT bond declaration |
Frequently Asked Questions
Can I create GST invoices for free?
Yes. Templix AI provides compliant GST invoice templates with automated tax splits and HSN/SAC code support.
2026 Invoice Compliance & Fast Settlement Checklist
Verify these core line items before dispatching your billing documentation:
Sequential & Distinct ID
Maintain structured, unbroken numbering (e.g. INV-2026-001) for clean tax audits.
Direct Payment Rails & Pay Now Button
Embed Stripe, ACH, or instant wire links directly on the PDF for 1-click settlement.
Itemized Tax & SAC/HSN Codes
Clearly isolate gross subtotal from applicable GST/VAT percentages and line deductions.
Explicit Due Dates & Late Terms
State exact calendar deadlines and recurring late-interest policies upfront.
Reviewed by Finance & Document Structuring Specialists
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