InfiBis

Invoice Number Generator India 2026

Create sequential, GST-compliant invoice numbers with custom prefixes, years, and formats. Plan your numbering before the new financial year. Free tool for Indian businesses.

Configure Invoice Numbering

GST Invoice Numbering Rules

  • • Sequential numbering is mandatory for GST compliance
  • • New series required for each financial year (from 1 April)
  • • Separate series for different branches is allowed
  • • No gaps or duplicates allowed in the sequence

Generated Invoice Numbers

Configure your format and click "Generate" to see invoice numbers

Auto-Number Invoices in InfiBis

InfiBis automatically assigns sequential invoice numbers, resets the series each financial year, and prevents gaps or duplicates. No manual tracking needed.

Try InfiBis Free

GST Invoice Numbering Rules 2026

Mandatory Requirements

  • • Sequential numbering with no gaps
  • • Unique number for each invoice
  • • New series for each financial year (from 1 April)
  • • Separate series for different branches allowed

Common Formats

  • • INV-2026-001 — Prefix + Year + Sequence
  • • 2026-INV-001 — Year + Prefix + Sequence
  • • INV-001-2026 — Prefix + Sequence + Year
  • • SALE-001 — Simple Prefix + Sequence

What to Avoid

  • • Skipping numbers (e.g., 001, 002, 004)
  • • Reusing cancelled invoice numbers
  • • Non-sequential numbering (e.g., 100, 50, 200)
  • • Using the same series across financial years

Best Practices

  • • Use 3+ digit sequence (001, 002, 003)
  • • Include the year for easy identification
  • • Use branch codes for multi-location businesses
  • • Automate numbering with billing software

Auto-Number Invoices in InfiBis

InfiBis automatically assigns sequential invoice numbers, resets the series each financial year, and prevents gaps or duplicates. No manual tracking needed.

Try InfiBis Free
Invoice Number Generator India 2026 — GST Invoice Numbering Tool | InfiBis | InfiBis