Back to Tools

Invoice Gap Finder

Detect missing invoice numbers and ensure complete sequential compliance.

Overview

GCC tax authorities require sequential invoice numbering—gaps can trigger audit scrutiny. This tool analyzes your invoice register and identifies any missing numbers in your sequence. Whether you're using simple numeric sequences (001, 002, 003) or complex formats (INV-2024-001), we detect what's missing.

Key Benefits

  • Detects gaps in any invoice numbering format
  • Identifies exact missing invoice numbers
  • Handles complex formats (prefixes, dates, suffixes)
  • Shows gap location for quick investigation
  • Prevents audit issues from sequential gaps

How It Works

1

Upload your invoice list (CSV or Excel)

2

System auto-detects numbering format

3

Review list of missing invoice numbers

4

Investigate and document gaps before audit

Frequently Asked Questions

What invoice formats are supported?

Numeric (001), prefixed (INV-001), dated (INV-2024-001), and most custom formats.

What if gaps are legitimate (voided invoices)?

Document voided invoices separately. The tool identifies gaps; you explain the legitimate ones.

Cost in Credits
3
per use
Tool
Invoice Number Gap & Duplicate Checker
Processing
100% client-side, your data stays private
Formats
CSV and Excel (.xlsx)