Mistakes on sent invoices are routine: an hour billed twice, the wrong rate on a line, a discount you forgot to apply, a deliverable the client canceled after you invoiced. The tempting fix is to open the invoice, change the number and send it again. That works until the client's accounts team has already entered the first version, or your accountant finds two documents with the same number and different totals.
A credit note is the clean fix. It leaves the original invoice untouched, issues a separate numbered document that reduces or cancels it, and states why. Your records and the client's then tell the same story.
TL;DR
The credit note template references the original invoice number and date, states the reason, lists the credited lines with quantities and amounts, reverses tax at [TAX RATE]% where the invoice carried it, and says whether the credit is refunded or applied to a future invoice. Issue a credit note instead of editing any invoice that has already been sent, and number credit notes in their own series, such as CN-2026-001.
What's inside
- Credit note header — "CREDIT NOTE" title, your details, credit note number, issue date.
- Original invoice reference — invoice number, date and original total.
- Reason for credit — one or two sentences: billing error, canceled work, agreed discount, duplicate line, full cancellation.
- Credited lines — the lines being reduced or removed, with quantity and amount.
- Tax adjustment — the tax portion being reversed.
- Revised position — original total, credit, revised total, amount paid, balance or refund due.
- Settlement — refund method and date, or credit applied to a named future invoice.
When to use it
Issue a credit note when:
- The invoice has already been sent and you overcharged, used the wrong rate, or billed a line twice.
- The client canceled part of the work after you invoiced it.
- You agreed a goodwill discount or a service credit after invoicing.
- You need to cancel an invoice entirely, for example because it went to the wrong entity. Credit it in full, then issue a new correct invoice.
- A client paid in advance for work that will no longer happen.
Edit the invoice instead only when: it is still a draft and has never been sent. Once it has left your hands, use a credit note.
Do not use a credit note to record a payment; that is a payment receipt. And if you are only showing the client a preview of charges, a proforma invoice is the right document, so nothing needs crediting later.
Credit note versus edit versus new invoice
| Situation | What to do |
|---|---|
| Invoice is a draft, never sent | Edit the draft |
| Sent invoice, amount too high | Credit note for the difference |
| Sent invoice, amount too low | New invoice for the additional amount |
| Sent to the wrong client entity | Full credit note, then new invoice to the right entity |
| Client canceled work already invoiced and paid | Credit note, then refund or apply to the next invoice |
Handling the tax line
If the original invoice charged tax, the credit note should reverse the tax on the credited amount, at the same rate used on the invoice. That keeps your tax return and the client's in step. Rules on when and how credit notes are reported vary by country, so check with your accountant if you are tax-registered. The freelance taxes and finance guide covers record-keeping basics.
Customize it in your COLO workspace
COLO invoices support line items, tax rates and discounts, and you can download a PDF or email an invoice. If you discover an error before sending, fix the invoice itself. For sent invoices, use this downloadable credit note template alongside your COLO records, and keep it with the client's documents. Invoice and payment reports export to CSV, Excel or PDF for your accountant. See Invoicing and Payments.
Common mistakes
- Editing sent invoices. The client's records and yours no longer match.
- No original invoice reference. Nobody can tell what was credited.
- No reason. Auditors and clients both ask why.
- Forgetting the tax. The credited amount and the tax reversal must both appear.
- Reusing the invoice number. Credit notes need their own sequence.
FAQ
Q: What is a credit note?
A credit note is a document that reduces or cancels an invoice you have already issued. It references the original invoice, states the amount credited and the reason, and keeps your invoice records intact.
Q: Why not just edit the original invoice?
Once an invoice has been sent, the client may have recorded it, and your own books and tax records include it. Editing or deleting it creates gaps and mismatches. A credit note corrects the amount while keeping both records.
Q: When should I issue a credit note?
When you overcharged, when the client returns or cancels part of the work, when you agree a discount after invoicing, when a line was billed twice, or when you need to cancel an invoice entirely.
Q: Does a credit note mean I have to refund money?
Only if the client already paid. If the invoice is unpaid, the credit reduces what they owe. If it is paid, you either refund the amount or apply it to a future invoice, as agreed with the client.
Q: Do credit notes need their own numbers?
Yes. Use a separate sequence such as CN-2026-001 and always reference the original invoice number. Many tax authorities expect this, and it makes reconciliation easy.
Related
The freelance invoice template is the document a credit note corrects.