GST Invoice Format
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GST Invoice Format Requirements
As per the GST Act, every registered supplier must issue a GST tax invoice with these mandatory fields:
Invoice Number
Sequential and unique per financial year
Date of Issue
Date when the invoice is raised
Supplier GSTIN
Your 15-digit GST registration number
Buyer GSTIN
Required if buyer is GST registered
HSN / SAC Code
For goods (HSN) or services (SAC)
Tax Rate
5%, 12%, 18%, or 28% applicable GST
CGST + SGST or IGST
Based on same-state or inter-state supply
Place of Supply
State/UT where supply is made
CGST vs SGST vs IGST — When to Apply?
CGST + SGST
Same State
When supplier and buyer are in the same state. Tax is split equally between Central and State.
IGST
Inter-State
When supplier and buyer are in different states. Full tax goes to Central Government.
UTGST
Union Territories
Applies in Union Territories instead of SGST.
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