Free GST Invoice Maker Online: Complete Guide for 2026

September 2026

Looking for a free GST invoice maker online? Invoice31 is the perfect solution for generating GST-compliant invoices quickly and easily. With automatic GST calculation, GST number fields, and professional invoice templates, you can create GST invoices in seconds.

What is a GST Invoice?

A GST invoice is a document that shows the goods or services supplied, along with the GST amount charged. It's required for businesses registered under GST. A proper GST invoice should include:

  • Business name and GST number
  • Customer name and GST number (for B2B)
  • Date of invoice
  • Description of goods/services
  • Quantity and price
  • GST rate and amount
  • Total amount including GST

Why Use Invoice31 as Your Free GST Invoice Maker?

Invoice31 is the best free GST invoice maker online because it offers:

  • Automatic GST Calculation: GST is calculated automatically based on your settings
  • GST Number Fields: Add your GST number and customer GST number
  • Professional Templates: Clean, professional invoice design
  • 100% Free: No subscription, no hidden charges
  • No Signup: Start creating invoices immediately
  • Works Offline: No internet required
  • Multiple Print Options: A4 and 80mm thermal printer
  • PDF Export: Download invoices as PDF

How to Create GST Invoices with Invoice31

  1. Set Up GST: Go to Settings and add your GST number and GST percentage
  2. Launch the App: Click on the "Launch App" button
  3. Add Items: Click "Add Row" to add products or services
  4. Enter Details: Add customer name, phone, and select "Business" for B2B customers
  5. Add GST Number: For business customers, add their GST/Tax number
  6. Set Discount: Apply flat or percentage discount
  7. Save Invoice: Click "Save" to store your GST invoice
  8. Print or Export: Print as A4/80mm or export as PDF

Features for GST Compliant Invoices

Invoice31 includes everything you need for GST compliance:

  • Business Customer Support: Add business name, address, and GST number
  • Automatic GST Calculation: GST calculated based on your settings
  • Registration Number Field: Add your registration number (GST, company reg, etc.)
  • Professional Layout: Clean invoice design with all GST details
  • Tax Invoices: Generate tax invoices suitable for GST compliance

Who Needs GST Invoices?

GST invoices are essential for:

  • Registered Businesses: All GST-registered businesses must issue GST invoices
  • B2B Transactions: When selling to other businesses, GST invoices are required
  • Online Sellers: E-commerce sellers need GST invoices for their sales
  • Service Providers: Consultants, freelancers, and agencies serving businesses
  • Retailers: Retail stores selling to business customers

Get Started Today

Ready to create your first GST invoice? Launch Invoice31 now and start generating professional GST-compliant invoices for free. No signup, no credit card, just pure invoicing.

Ready to Create GST Invoices?

Use Invoice31 now - it's free, fast, and secure.

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