What is a credit note, and when should I issue one?

What a credit note is for

A credit note is a document you, the seller, issue to reduce the amount a client owes on an invoice you have already issued. It names the original invoice, states how much is being credited and explains why. In the US it is often called a credit memo; the purpose is the same.

The point is to correct the record without rewriting it. Once an invoice is issued, your client may have entered it in their accounts and you may have reported it as income. Changing the PDF would leave the two sets of records disagreeing. A credit note keeps the original intact and adds a second, clearly linked document that adjusts it.

Does a credit note mean you owe money? Not necessarily. If the invoice is unpaid, the credit simply lowers the balance due. If the client has already paid, the credit leaves them in credit with you, which you then refund or apply to a later invoice as agreed.

When to issue a credit note

Use a credit note whenever the amount on an issued invoice turns out to be higher than what is actually owed. Typical cases for freelancers and studios include the following.

1. You billed more hours, units or a higher rate than you agreed.
2. Part of the agreed scope was canceled before it was delivered.
3. You and the client agreed a discount or goodwill reduction after issue.
4. The invoice was sent to the wrong client or duplicated, so the whole amount is canceled.
5. A prompt-payment discount was taken, where your terms and tax rules use a credit note for it.

What to include on a credit note

Treat a credit note as a document in its own right. Give it its own unique number, often from a separate series such as CN-2026-007, and its own issue date. Reference the original invoice number and date so anyone can connect the two.

Show your details and the client’s, a description of what is being credited, the credited amount and, where relevant, the tax being reversed. State the reason in one plain sentence, such as “Canceled second design round, as agreed with John Park on October 3.” Finally, say what happens next: the reduced balance due, a refund, or a credit to use on a future invoice.

If you charge VAT or a sales tax, the tax side has rules of its own. HMRC’s VAT guide describes using credit notes to adjust the VAT charged when the price is later reduced, and expects both supplier and customer to keep records. Other places differ, so check the official guidance or ask an accountant.

Full or partial credit

A credit note can cancel all of an invoice or part of it. A full credit is right when the invoice should never have been issued: a duplicate, the wrong client, or a project canceled before any billable work. The credit note equals the invoice total, and the net amount owed becomes zero. If the client still owes something, issue a new, correct invoice with a new number.

A partial credit is right when most of the invoice stands but one part does not. Credit only that part, describe it as precisely as the original line, and leave the rest of the invoice untouched. Your records then show the original charge, the reduction and the reason, in that order.

Agree the credit before you issue it

A credit note changes money, so treat it like any other commercial decision. Confirm with the client’s authorized contact what is being removed and why, and keep that confirmation with the credit note. In a studio, decide who may issue credits; it is often the same person who may issue invoices.

Send the credit note to the same billing contact who received the original invoice. A short covering note helps: “Attached is credit note CN-2026-007 for $150 against Invoice #104. The balance due is now $1,100.” That one sentence prevents most follow-up questions.

A credit note example

Emi Studio issued Invoice #104 to Acorn Studio for $1,250: 12.5 hours at $100 per hour for a website refresh. Before the work finished, John Park, Acorn’s approver, agreed to drop one revision round worth 1.5 hours. That is $150 of scope that will not be delivered.

Emi does not change Invoice #104 to $1,100. She issues credit note CN-2026-007 for $150, referencing Invoice #104, with the reason “Removed one revision round (1.5 hours at $100), agreed October 3.” Acorn now owes $1,250 minus $150, or $1,100. If Acorn had already paid the full $1,250, the $150 would be refunded or held as credit, whichever they agreed.

Anyone reading the records later sees three things in order: the $1,250 invoice, the $150 credit note and the payments. Each figure is explained by its own document, and no issued total was changed. That is the whole purpose of a credit note.

Credit note vs refund, debit note and editing the invoice

A credit note and a refund are not the same thing. The credit note changes what is owed; a refund is the movement of money back to the client. You may issue a credit note with no refund, if the invoice was unpaid, or a credit note followed by a refund, if it was paid.

A debit note works the other way. It is usually issued by a buyer, for example when returning goods, to record an amount they expect the seller to credit; some sellers also use the term for an extra charge. Which comes first depends on who starts the adjustment, so use whichever document your client’s process expects.

Editing the original invoice should be limited to drafts that have never been issued. After issue, use a credit note to reduce, and a separate supplementary invoice to add.

How Moolamochi approaches this

In Moolamochi, an issued invoice keeps its original legal details and amounts. When an approved scope change reduces work against an issued invoice, the negative change requires a credit draft for finance review instead of a rewritten original. Pending, rejected and withdrawn proposals leave amounts unchanged. Credits and refunds have their own records, and credits keep dated history. New access is currently waitlist-only.