Invoice Numbering System

Never assign a duplicate invoice number again. Counter is saved to your browser.

Configuration

Prefix

Period (year, fiscal year, quarter; leave blank to skip)

Starting number

Padding

Separator

Current counter

Output

Current

INV-2026-001

Next 5 in sequence

Counter saved automatically

→Most tax authorities require invoice numbers to be sequential within a period, so don't skip numbers.
→Resetting the period (year, fiscal year, quarter) and the counter at the start of each cycle keeps audits clean.
→Your counter is stored locally. Clearing browser data resets it, so note your last number.