Quick Answer
You cancel an invoice in one of three ways, depending on how far it has gone. If it is still an unsent draft, edit it and send the corrected version. If it has been sent but not paid, void it — keep the invoice number in your records marked VOID, never delete or reuse it — and issue a corrected invoice that references the voided one. If it has already been paid, or been recorded in your books or a filed tax return, issue a credit note instead: a separate numbered document that references the original invoice and cancels all or part of its value, settled either by a refund or as credit against future work.
How you cancel an invoice depends entirely on how far it has already traveled. If it is still an unsent draft, edit it and move on. If you have sent it and the client has not paid, void it — keep the number, mark the record VOID, and issue a corrected invoice that references it. If it has been paid, or already landed in your books or a filed tax return, you do not cancel it at all: you issue a credit note against it. What you never do is quietly delete a sent invoice or reuse its number. This guide covers all three routes, the exact wording to send the client, and the accounting rules that decide which one applies.
Work Out Which Situation You Are In
Nearly every "can I cancel this invoice?" question resolves in about ten seconds once you know two things: has the client seen it, and has any money or bookkeeping moved. Find your row.
| Where the invoice is | What to do | What happens to the number |
|---|---|---|
| Draft, never sent | Edit it, or delete the draft outright | Not yet issued — free to reuse |
| Sent, unpaid, wrong amount or wrong details | Void it and send a corrected invoice | Kept, marked VOID, never reused |
| Sent, unpaid, work cancelled entirely | Void it and confirm cancellation in writing | Kept, marked VOID, never reused |
| Paid in full or in part | Issue a credit note, then refund or credit forward | Kept and unchanged; the credit note gets its own number |
| Already in a filed VAT return or closed accounting period | Issue a credit note dated in the current period | Kept and unchanged; do not backdate |
The dividing line is whether the invoice has become part of a record someone else relies on. Before that point it is a piece of paper you can withdraw. After it, the fix has to be additive — a new document that explains the change — rather than subtractive.
Route 1: The Invoice Is Still a Draft
Easiest case. Nothing has been issued, so nothing needs cancelling — correct the line items, the dates, or the client details and send the version you meant to send. In InvoiceBloom an invoice stays a draft until you send it, so you can edit it freely up to that point, and the number is not committed until it goes out.
One caution: "draft" means the client has genuinely not seen it. If you emailed a PDF from your own machine and only later recorded it in your invoicing system, the client has a copy and it counts as sent. Treat it as Route 2.
Route 2: Voiding a Sent, Unpaid Invoice
Voiding cancels an invoice's claim to payment while leaving the record of it intact. It is the right move when the invoice went out with the wrong hours, the wrong rate, the wrong client name, missing tax details, or when the project was called off before payment.
Four steps, in order:
- Mark the original VOID in your records. Keep it, keep its number, and make the status unmistakable — a watermark or a status field, not a mental note.
- Tell the client in writing, in the original email thread. An invoice you consider cancelled is still sitting in someone's accounts payable queue until you say otherwise. This is the step people skip, and it is how clients end up paying voided invoices.
- Issue the replacement with the next number in your sequence. Never reissue the voided number. If you are unsure what your next number should be, our invoice number generator will produce one in the right format.
- Reference the voided invoice on the replacement. One line is enough: "Replaces invoice INV-025, cancelled March 3, 2026." That single line is what makes the correction self-explanatory a year later.
Keeping the voided number in the sequence is not bureaucratic fussiness. A gap in your numbering is indistinguishable from an invoice you forgot to record, which is exactly the ambiguity an auditor or an accountant will ask you to resolve. Our guide to invoice numbering systems covers the sequencing rules in full, including where unbroken numbering is a legal requirement rather than a convention.
Wording for the Cancellation Email
Short, specific, and sent as a reply to the original invoice email so both documents live in one thread:
Hi Sam — please disregard invoice INV-025, sent March 3. It listed 14 hours rather than the 12 we agreed. I have cancelled it and attached the corrected invoice, INV-026, for $2,400, due March 17. Apologies for the confusion — let me know if your accounts team needs anything else for their records.
Do not apologize at length and do not explain your internal processes. Clients care about two things: which invoice is dead, and what they should pay instead.
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Route 3: Issuing a Credit Note
A credit note — also called a credit memo — is a separate document that cancels all or part of an invoice you have already issued. It does not erase the original. It sits alongside it and reduces its value, which is precisely why accounting systems and tax authorities prefer it: the trail shows what was billed, what was withdrawn, and when.
You need a credit note rather than a void when:
- The client has already paid the invoice, in full or in part.
- The invoice has been entered into your books or a client's, and the period is closed.
- The amount was reported on a tax return that has already been filed.
- You are only reducing the invoice, not cancelling it — a partial refund, a discount applied after the fact, or a disputed line item you have agreed to drop.
- You issued a formal tax invoice in a VAT or GST jurisdiction, where corrections are generally made by credit note rather than by amending the original. Rules differ by country, so confirm your obligations against current local guidance or with your accountant. Our guide to tax invoices covers what makes an invoice a tax invoice in the first place, and the international invoicing guide covers cross-border VAT wording.
What a Credit Note Must Contain
- The words "Credit Note" at the top — not "Invoice", not "Refund"
- Its own unique number, from a separate sequence: CN-2026-001, CN-2026-002, and so on
- The issue date
- The original invoice number and date it relates to
- Your details and the client's details, exactly as they appeared on the original
- An itemized description of what is being credited and why
- The amount credited, with tax shown separately if the original showed tax separately
- How the credit is being settled — refunded, or applied to a future invoice
A credit note is one of the few documents where "same as the invoice, but negative" is genuinely the right mental model. If you already have a clean invoice layout, adapt it rather than inventing something new — our invoice template gallery is a reasonable starting point for the layout.
Full vs Partial Credit
A full credit note cancels the entire invoice: a $2,400 invoice, a $2,400 credit, balance zero. A partial credit note reduces it: you billed $2,400, the client disputed one $400 line item, you agree, and you issue a $400 credit note. The invoice stays at $2,400 in your records and the client now owes $2,000. Do not reissue the invoice at $2,000 — that would leave two live invoices for the same work, which is worse than the problem you were solving.
Credit Note vs Refund vs Write-Off
These three get used interchangeably in conversation and mean very different things in your books.
| Instrument | What it means | When to use it |
|---|---|---|
| Credit note | A document reducing what the client owes | The invoice was wrong, or the work was reduced or cancelled |
| Refund | Money actually moving back to the client | They already paid and want the cash back rather than a credit |
| Write-off (bad debt) | Accepting that a valid invoice will never be paid | The invoice was correct; the client simply will not pay |
The distinction that matters most: never use a credit note to clear an invoice a client is refusing to pay. Crediting it says the charge was not owed, which undercuts you if you later pursue the debt and misstates your income. That is a write-off, and it belongs at the end of a collections process — see how to follow up on unpaid invoices before you get there.
Five Things Not to Do
- Do not delete a sent invoice. Your copy disappears; the client's does not. You have destroyed your half of a record that still exists on their side.
- Do not reuse the number. Two documents sharing one invoice number is the single fastest way to make your records unreconcilable.
- Do not silently edit and resend. Sending a corrected PDF under the same number, with no note, means the client's accounts team now holds two different documents claiming to be INV-025. It is also one of the invoice mistakes that delay payment most reliably.
- Do not backdate the correction. If the original period is closed, date the credit note today. Backdating into a filed period is how a small clerical fix becomes a real problem.
- Do not leave the client guessing. Cancelled in your system is not cancelled in theirs until you have said so in writing.
Timing and Accounting Periods
If you catch the error in the same month, before anything is filed or reconciled, voiding and reissuing is clean and there is nothing else to think about. If the invoice has crossed into a closed month, quarter, or tax year, the credit note carries today's date and shows up in the current period — the original stays where it was. That is the expected treatment in most bookkeeping systems, but the specifics of how a correction is reported depend on your jurisdiction, your accounting method, and whether tax was involved, so run anything that crosses a filed return past your accountant rather than deciding it yourself.
One practical habit prevents most of this: send invoices promptly and check them before they go, not after. A quick review of the client name, the dates, the line items, the totals, and the payment terms takes under a minute. If you are still building that habit, the step-by-step freelance invoicing guide walks through what belongs on an invoice before it goes out, and the invoice vs receipt guide explains which document you should be sending in the first place.
Frequently Asked Questions
Can I just delete an invoice I already sent?
Delete it only if it is still an unsent draft. Once an invoice has been sent, it exists in someone else's records as well as yours, and deleting your copy leaves a gap that neither of you can explain later. Void it instead: keep the record and its number, mark it VOID, and tell the client in writing that the invoice is cancelled. If the invoice has already been paid, or entered into your books or a filed tax return, do not void it either — issue a credit note against it.
What is a credit note and when do I need one?
A credit note, also called a credit memo, is a separate document that cancels all or part of an invoice you have already issued. It carries its own unique number, states the date, references the original invoice number, and shows the amount being credited. You need one whenever the original invoice can no longer simply be withdrawn: it has been paid, it has been recorded in your accounts for a closed period, or it was a tax invoice in a VAT or GST jurisdiction where corrections are made by credit note rather than by amending the original. Rules differ by country, so confirm your obligations against current local guidance or with your accountant.
What happens to the invoice number when I cancel an invoice?
The number stays used. Keep the cancelled invoice in your records under its original number, marked VOID, and give the replacement the next number in your sequence — never reissue the old number to a different invoice or a different client. A sequence that reads INV-024, INV-025 (VOID), INV-026 is complete and explains itself; one that jumps straight from INV-024 to INV-026 looks like a record you lost. On the replacement, add a line referencing the voided number so the correction has a paper trail.
What is the difference between a credit note and a refund?
A credit note is the accounting document; a refund is the movement of money. Issuing a credit note reduces what the client owes you by the credited amount, so if they have not paid, the balance simply drops. If they have already paid, the credit note creates a balance in their favor, which you settle either by sending the money back or by applying it against their next invoice. Ask the client which they prefer — long-term clients often take the credit, and one-off clients almost always want the cash.
How do I tell a client I am cancelling their invoice?
Keep it short, name the invoice number, and say what replaces it. For example: "Hi Sam — please disregard invoice INV-025, sent March 3. It listed the wrong hours. I have cancelled it and attached the corrected invoice, INV-026, for $2,400." Send it as a reply to the original email so both documents sit in one thread, and send it before the client pays the wrong amount if you possibly can.
The Short Version
Draft: edit it. Sent but unpaid: void it, keep the number, reissue with the next one, and tell the client. Paid or already in the books: issue a credit note with its own number that references the original. Never delete a sent invoice, never reuse a number, and never let a cancellation live only in your own system.