GST Invoice Format in India (2026)

Last Updated: May 2026

A GST invoice is a legal document issued by a registered business when selling goods or services. It plays a crucial role in taxation, compliance, and claiming Input Tax Credit (ITC).

What is a GST Invoice?

A GST invoice (also called a tax invoice) contains details of the transaction, including seller information, buyer details, product/service description, and GST breakdown.

Why GST Invoice is Important

• Required for legal compliance
• Helps in claiming ITC
• Acts as proof of sale
• Used for audits and accounting

Mandatory Fields in GST Invoice

According to GST law, every invoice must include:

• Invoice number (unique)
• Invoice date
• Seller name, address, GSTIN
• Buyer details (if registered)
• Description of goods/services
• Quantity and value
• GST rate and tax amount
• Place of supply
• Signature

GST Invoice Format (Example)

Here is a simple example:

• Product Price: ₹1000
• GST (18%): ₹180
• Total Amount: ₹1180

For interstate transactions:

• IGST applies instead of CGST + SGST

Types of GST Invoices

• Tax Invoice: For taxable goods/services
• Bill of Supply: For exempt goods or composition scheme
• Debit Note: For increasing value
• Credit Note: For reducing value

GST Invoice Rules

• Invoice must be issued within 30 days of service
• Serial number must be unique
• Maintain proper records for 6 years

Common Mistakes in GST Invoices

• Missing GSTIN
• Incorrect tax calculation
• Wrong invoice numbering
• Missing place of supply

Example with CGST & SGST

₹2000 product at 18% GST:

• CGST: ₹180
• SGST: ₹180
• Total: ₹2360

Use our GST Calculator to generate accurate values.

FAQs

Is GST invoice mandatory?

Yes, for registered businesses.

Can I create GST invoice manually?

Yes, but it must follow rules.

What happens if invoice is incorrect?

It may lead to penalties or ITC rejection.

Conclusion

A proper GST invoice ensures compliance and smooth business operations. Always follow GST rules and maintain accurate records.