InvoiceSwitching from your old program
Carry on where you left off: set the start number to your last invoice number plus one.
- 1Last number in your old tool: 0287
- 2Start number: 288
- 3Your first invoice: 0288
All features
Settings
Number ranges in your format — sequential and gap-free.
Your own series for invoices, quotes, cancellations and customers. Choose the prefix, the length and where to start — Invoice numbers every document when it is issued, never twice, never with a gap.
- Separate ranges for invoices, quotes, cancellations and customers
- Prefix, suffix, length and start number — with a live preview
- Numbered when issued — sequential and gap-free
The format
How a number is made up.
Three parts, set per range — the preview shows the next number while you type.
- Prefix
- Optional · letters, digits and dashes, plus {YYYY}, {YY} or {MM} · up to 20 characters
- Counter
- Minimum digits 1–8, padded with zeros · start number up to 999,999,999
- Suffix
- Optional · letters, digits and dashes, plus {YYYY}, {YY} or {MM} · up to 20 characters
Gap-free
Gap-free — even when something goes wrong.
Numbered when issued
Drafts have no number. It is assigned the moment you issue — so a deleted draft never leaves a gap.
One after the other
Two invoices issued at the same moment get consecutive numbers — never the same one.
Failed means not used
If issuing fails, the number goes back — the next invoice gets it.
Corrected, same number
Your latest invoice, not yet sent or reminded, goes back to draft and keeps its number when re-issued.
Deleting the latest releases it
Delete your latest unsent, unpaid, unreminded invoice and the next one reuses its number.
Never a duplicate
A number that already exists is blocked — with a clear message instead of a second invoice.
In practice
Two moments you’ll meet.
A new year
Want the year in your numbers? Put {YYYY} in the prefix and set “Start again” to “Every year” — the new year begins at 0001 by itself.
- 1Prefix INV-{YYYY}-
- 2Start again: Every year
- 31 January: INV-2027-0001
FAQ
Questions about number ranges
Short answers to what people ask us most.
Are invoice numbers sequential and gap-free?
Yes. A number is assigned only when an invoice is issued, one after the other — drafts don’t use one, and a failed issue gives it back. Deleting or correcting is only possible for the latest number, so no gap appears.
Can I continue my numbering from my previous program?
Yes. Set the start number to your last invoice number plus one — your first invoice in UNENO continues the series.
How do I start fresh in a new year?
Put the year in the number with {YYYY} — for example the prefix INV-{YYYY}- — and set “Start again” to “Every year”. On 1 January the count starts again at your start number by itself: INV-2027-0001. With “Never”, the year in the number changes and the count simply carries on. “Every month” works the same with {MM}.
Which characters can I use?
Letters, digits and dashes in the prefix and suffix, each up to 20 characters — plus the placeholders {YYYY}, {YY} and {MM} for the year and month. The counter is padded with leading zeros to the minimum number of digits you choose (1 to 8).
Do drafts get a number?
No. A draft is numbered only when you issue it — so you can create, change and delete drafts without ever leaving a gap.
Do customers get a customer number?
Yes, automatically from the customer number range when the customer is created. It appears on your invoices and cannot be changed afterwards.
Continue reading
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- GDPR-compliant
- E-invoicing built in
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