Can you edit an invoice after sending it?

Not really. Once an invoice is issued to a client it is a record — the correct fix is a credit note and a replacement, not an edit.

Editing a sent invoice creates two versions of the same numbered document, and the client's copy no longer matches yours. If they have already booked it, your edit is invisible to them and both sets of books are now wrong.

If the invoice has not left your device and nobody has seen it, editing is harmless. The moment it is sent, treat it as issued.

Before it is sent: edit freely

An unsent invoice is a draft. Change anything. The obligations attach when the document goes to the customer, not when it is created.

After it is sent, before it is paid

Here the answer depends on whether you are tax-registered.

Not registered: in practice you can reissue a corrected invoice with the same number, provided you tell the client and they have not entered it in their books. Say plainly that it replaces the earlier version and ask them to discard it.

Registered: generally no. Once issued, the invoice has created a tax point and the amount has entered your records. The correct mechanism is a credit note cancelling it in whole or in part, then a fresh invoice if needed. Quietly editing a document your customer has already entered creates two different versions of the same invoice number in two sets of books, which is the exact condition an audit is looking for.

After it is paid

Never edit. The payment reconciles against the document as it was. If something was wrong, issue a credit note and, where money is owed back, a refund. If you undercharged, issue a second invoice for the difference rather than rewriting the first.

What a credit note actually does

It is a negative invoice that references the original by number. It reverses the amount and the tax, gives both parties a matching document, and leaves the original sequence intact. Partial credits are normal — crediting £400 of a £2,400 invoice is a single credit note, not a cancellation and a reissue. Credit notes covers the mechanics.

Why the sequence must survive

Deleting an invoice leaves a gap in your numbering, and a gap is what suppressed income looks like from outside. Cancel in place, keep the number, move on to the next. How to number invoices covers why inspectors care about this more than about almost anything else on the document.

The common corrections, and what each needs

• Wrong amount: credit note for the difference, or full credit and reissue if the whole thing was wrong.
• Wrong client entity: full credit note, new invoice to the correct entity. Do not simply change the name — the original went to a different legal person.
• Wrong tax rate: credit and reissue. The tax figure is the part that matters to both sets of books.
• Typo in a description, nothing else affected: in most systems a corrected copy is acceptable if the customer has not booked it. Tell them anyway.
• Wrong date: depends whether it moves the tax period. Within a period, usually minor. Across one, treat it as a reissue.

Keep the superseded version

Whatever route you take, keep the original document. A credit note that references an invoice nobody can produce is half a record. Retention rules apply to cancelled and credited documents exactly as they do to paid ones.

Free, unlimited, no ads and no account. Get EstimateBill — or try the free browser invoice generator with nothing to install.