Free Online GST Invoice Generator
Create 100% compliant Indian GST invoices in your browser. Automatic CGST, SGST, and IGST calculations, mandatory HSN/SAC codes, dynamic UPI QR payments, and instant vector PDF downloads.
Compliant With Rule 46
- Verified 15-digit GSTIN format
- HSN & SAC classifications
- State code & Place of Supply
- Sequential numbering schema
- LUT export declarations
How to Create a GST Invoice in 3 Steps
Enter GSTIN & State Details
Enter your business details, 15-digit GSTIN, and select your client's state to determine tax treatment.
Add Items & HSN/SAC Codes
Itemize goods or services. Luen calculates intra-state (CGST + SGST) or inter-state (IGST) in real time.
Download Clean Vector PDF
Attach your UPI QR code or bank details, then download your vector PDF instantly without any watermarks.
Built for Indian Freelancers, Agencies & SMBs
Intelligent Tax Split Engine
Automatically differentiates between intra-state (9% CGST + 9% SGST) and inter-state (18% IGST) based on billing destination.
Dynamic UPI QR Code
Clients can scan and pay directly using any UPI application (GPay, PhonePe, Paytm, BHIM) with pre-filled invoice amounts.
LUT Export of Services
Bill foreign clients with 0% IGST under approved Letter of Undertaking, complete with statutory regulatory endorsements.
HSN & SAC Directory Ready
Keep compliant accounting records by tagging each service or merchandise line with appropriate classification codes.
Rule 46 Structural Layout
Guarantees all statutory fields required for B2B input tax credit (ITC) claims by your enterprise clients.
Zero Watermarks, Ever
Clean, print-ready 300 DPI vector PDF exports that showcase your brand, not third-party software ads.
Frequently Asked Questions About GST Invoicing
Clear answers regarding Indian tax laws, calculations, and invoice formats.
How does the GST invoice calculator decide between CGST/SGST and IGST?
If the supplier and client are in the same state (intra-state transaction), GST splits equally into Central GST (CGST) and State GST (SGST). If the client is located in a different state (inter-state transaction), Integrated GST (IGST) is applied automatically.
Can I generate export invoices under Letter of Undertaking (LUT)?
Yes. Luen supports zero-rated cross-border export invoicing. When exporting services, you can declare 0% IGST under LUT and the mandatory statutory declaration will be automatically printed on your PDF invoice.
Can I add HSN or SAC codes to invoice line items?
Yes. Every line item includes dedicated HSN (goods) and SAC (services) fields to ensure complete compliance with Indian tax classification standards.
Is there any watermark on the exported GST PDF invoice?
No. Invoices generated through Luen are clean, professional vector PDFs without third-party watermarks or branding stamps.
Can I add a UPI QR code for instant client payments?
Yes. Enter your UPI VPA handle (e.g. yourname@upi), and Luen renders a dynamic UPI payment QR code directly on the PDF for one-scan settlement via Google Pay, PhonePe, or Paytm.
Ready to create your GST invoice?
Stop managing complicated spreadsheet formulas. Generate, calculate, and download your compliant invoice in under 60 seconds.