A credit note is a document you send to a client that reduces or cancels part of an invoice you already issued, without deleting the original. It covers billing errors, returns, cancelled orders, and discounts you agree to after the fact, while keeping a paper trail your books, and your client’s, can still follow.
A credit note isn’t a refund, and it isn’t a new invoice
Most invoicing software won’t let you edit or delete an invoice once it’s out the door, and for good reason. Once a client has a copy, quietly changing yours creates a mismatch between what they have on file and what you do. A credit note solves that without touching the original: it’s a separate document that references the original invoice number and reduces, or fully cancels, the amount owed, so both records stay intact.
It’s also not the same thing as a refund. The credit note is the paperwork that says money is owed back or an amount no longer applies. The refund is the actual transfer of money. You can issue a credit note and settle it as a refund, or apply it as credit toward the client’s next invoice instead.
When you’d actually issue one
A few situations come up more than most:
- A billing error: wrong amount, wrong item, a discount you forgot to apply
- Returned or damaged goods
- An order cancelled after the invoice already went out
- Partial delivery, where the client only received part of what was billed
- A goodwill or loyalty discount you agree to after the invoice was sent
What belongs on a credit note
A credit note works like a mirror image of an invoice. It should include a unique credit note number, the issue date, a clear reference to the original invoice number, your business and client details, the word “Credit Note” clearly labeled, the reason for the credit, and the amount, usually shown as a reduction. If the original invoice included tax, the credit note needs a matching tax adjustment.
This matters more in some places than others. In VAT and GST countries, credit notes are often a compliance requirement, not just good practice. The UK, for instance, requires businesses to issue a VAT credit note within 45 days of the change. The US has no equivalent federal rule, but the habit is worth keeping anyway: it’s the difference between a set of books that reconciles cleanly and a client emailing you to ask why their copy and yours show different totals.
Credit note or just a corrected invoice?
If an invoice hasn’t been paid or acted on yet, voiding and reissuing it inside your invoicing software is sometimes the simpler move. But once a client has the original in hand and has reconciled against it on their end, a credit note is the cleaner path. It doesn’t erase anything either side has already recorded, it just adjusts it, with both documents on file if anyone ever needs to see how the number changed.
How this works in Billbooks
Credit notes are one of the features in the new Billbooks app, alongside billable expenses, QR and digital signatures, and proforma invoices. You create a credit note against an existing invoice, and Billbooks keeps the two linked, so your reports and the client’s copy always agree on the final number. If you haven’t seen the full list of what shipped, we wrote up everything in the new app.
Bill accurately from day one
Create invoices, credit notes, and quotes from the same account, all linked automatically so your reports and your client’s copy always match.
A quick example
Say you invoice a client $1,200 for a project using a standard invoice template. They flag that one line item got billed twice. Instead of deleting the invoice, you issue a credit note for $200 that references the original invoice number. The client now owes $1,000, and both records explain exactly why the number changed. If you’re setting up payment terms for a client relationship like this one, it’s worth deciding upfront how adjustments like this get handled, the same way you’d decide on a due date or a late fee.
A credit note pairs naturally with the rest of how you invoice. If you haven’t nailed down your payment terms yet, or you want to see how weak invoicing habits cost real money, we covered that here. And if you’re still choosing your first invoice template, or want a refresher on the different invoice types freelancers and small businesses use, both are worth a look.
Frequently Asked Questions
A credit note is a document a business issues to a client to reduce or cancel part of a previously sent invoice, without deleting the original. It’s used for billing errors, returns, cancellations, and post-invoice discounts.
A credit note is the documentation, the record that an amount is no longer owed. A refund is the actual money moving back to the client. You can issue a credit note and settle it either as a refund or as credit toward a future invoice.
There’s no federal requirement to issue credit notes the way VAT and GST countries mandate, but keeping the practice anyway helps your books stay accurate and gives clients a clear paper trail. This isn’t tax advice, check with an accountant for your specific situation.
Yes. A full-amount credit note effectively cancels the invoice, which is common for cancelled orders or invoices sent by mistake.
It reduces the amount recorded against that transaction, since the client no longer owes the credited portion. Talk to an accountant about how to handle it in your specific bookkeeping setup.
Ready to send your next invoice?
Create the invoice, and if something needs adjusting later, issue a credit note in a couple of clicks, both stay linked automatically.
