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What is a GST Invoice?

A GST invoice is a legally compliant document that shows goods or services sold along with the GST (Goods and Services Tax) charged. It must include both party's GSTIN numbers, HSN (Harmonised System of Nomenclature) or SAC (Service Accounting Code) codes for each line item, the taxable value, and the GST amount broken down by type (IGST for inter-state sales or CGST+SGST for intra-state sales). Businesses with a GSTIN must issue GST invoices for B2B and most B2C transactions. Our free generator creates fully compliant invoices in under a minute — enter your details, add items with AI-suggested HSN/SAC codes, choose your tax type, and download a professional PDF ready to send or print.

Key Benefits:

  • ✓ Fully Compliant — Includes all mandatory GST fields: GSTIN, HSN/SAC codes, tax breakup
  • ✓ AI HSN/SAC Suggestions — Type your item description, AI suggests the correct tax code instantly
  • ✓ Auto Tax Calculation — Choose IGST (inter-state) or CGST+SGST (intra-state), all amounts calculated automatically
  • ✓ Accounting Software Ready — PDF format accepted by Tally, QuickBooks, GST portal for filing

Who Should Use This?

Freelancers and service providers with GSTIN; small business owners selling goods or services; freelancers invoicing clients across states; retailers issuing B2B invoices; and anyone needing GST-compliant invoices without accounting software setup.

How does it work?

Fill in your GSTIN, business name, and address. Enter the buyer's details and GSTIN. Add line items — type the item description and the AI suggests the correct HSN/SAC code. Set the quantity and rate. Choose your tax type (IGST for different states, CGST+SGST for the same state). All GST amounts are auto-calculated. Click download for a professional PDF invoice ready to email, print, or attach to GST returns.

Frequently Asked Questions

How do I create a GST invoice in India?

Enter your GSTIN, buyer details, and line items. Choose IGST (inter-state) or CGST+SGST (intra-state). The tool auto-calculates all tax amounts and generates a download-ready PDF.

What is the difference between IGST, CGST, and SGST?

IGST applies when buyer and seller are in different states. CGST+SGST applies within the same state — split equally at half the GST rate. Select the right mode and the tool handles all calculations.

What is an HSN code and where do I find it?

HSN codes classify goods; SAC codes classify services. Both are required on B2B invoices. Type your item description and the AI suggests the correct code — no manual GST rate chart needed.

Is this invoice format legally valid?

The format includes all mandatory GST fields: both GSTINs, invoice number, HSN/SAC, taxable value, and tax breakup. Accepted by most accounting software and GST portals. Verify your invoice number sequence before filing.

Is the GST invoice generator free?

Yes — completely free, no signup, no usage limits. Generate and download as many invoices as your business needs.