Invoice Numbering
Organised invoicing starts with smart numbering.
HMRC requires unique, sequential invoice numbers — but your business might need more than a simple counter. Invoify lets you create multiple numbering schemes with custom prefixes, date-based format patterns (like INV-{YYYY}-{####}), automatic reset periods, and separate sequences for each document type. Preview the next number before creating an invoice, and rest easy knowing duplicates are impossible.
Why your business needs this
HMRC compliance guaranteed
Sequential, unique invoice numbers are a legal requirement in the UK. Invoify enforces this automatically — no gaps, no duplicates.
Multiple schemes
Run different numbering for different document types or business lines. INV- for invoices, CN- for credit notes, PRO- for proformas.
Date-embedded formats
Include the year or month in your invoice numbers (e.g. INV-2026-0001) for instant chronological context.
Automatic reset
Choose to reset your counter yearly, monthly, or never. Yearly resets combined with year prefixes keep numbers short and organised.
Step by step
Create a numbering scheme
Go to Invoice Numbering and create a new scheme. Choose a name, prefix string, and format pattern using tokens like {YYYY}, {MM}, and {####}.
Assign to document types
Assign each scheme to one or more document types. Invoices can use INV-{YYYY}-{####} while credit notes use CN-{YYYY}-{####}.
Set a reset period
Choose whether the counter resets monthly, yearly, or never. Yearly resets are popular for businesses that want short numbers within each year.
Numbers auto-increment
Every new invoice automatically gets the next number in the sequence. Preview the next number anytime without incrementing the counter.
Everything included
Custom prefixes
Define any prefix string for your invoice numbers — your company initials, department codes, or standard labels.
Format patterns
Use tokens like {YYYY}, {MM}, {DD}, and {####} to build the exact format your business needs.
Per-type numbering
Assign different schemes to Invoices, Credit Notes, Debit Notes, Proformas, and Receipts.
Reset periods
Auto-reset counters monthly, yearly, or never. Keep numbers short and contextual.
Next number preview
See the next invoice number that will be generated without creating an invoice.
Lock protection
Schemes in use are locked to prevent accidental changes that could cause numbering issues.
Zero numbering errors
Manual numbering leads to gaps, duplicates, and HMRC compliance issues. Automated schemes eliminate these risks entirely while giving you full control over the format that suits your business.
Configuration Tips
- 1Use the format INV-{YYYY}-{####} with yearly reset for a clean, chronological numbering system.
- 2Create separate schemes for each document type — it makes filtering and searching much easier.
- 3Preview the next number before committing to a scheme to make sure the format looks right.