Documents · Glossary
What is a credit note?
A credit note is a document that reduces an amount a customer owes, in whole or in part, against an invoice already issued. It corrects an overcharge, records a return or cancels a sale, and it leaves both the original invoice and the correction visible in the record rather than replacing one with the other.
The instinct when an invoice is wrong is to delete it and send a better one. That works until somebody asks what happened to invoice four one seven, and by then the answer is nowhere in the system.
Indunil Asanka · Co-founder
5 min read · Published
| Credit note | Refund | Debit note | |
|---|---|---|---|
| Direction | Seller reduces what the buyer owes | Seller returns money already received | One party says more is owed |
| Money moves | No, unless the account is already in credit | Yes | No, it precedes an invoice or an adjustment |
| Effect on the ledger | Offsets an invoice, or sits as a credit balance | Clears a credit balance | Raises the balance |
| Tax treatment in Australia | Generally an adjustment note, supporting a decreasing adjustment | Follows the underlying adjustment | Depends on which party issues it and why |
| Typical trigger | Return, overcharge, cancelled line, agreed discount | Customer asks for the money back, or the account is closing | Undercharge, extra costs, a claim between the parties |
Why the original invoice stays where it is
An issued invoice has already left the building. The customer has it, their system has posted it, and in most tax systems it has fixed the period in which the sale is reported. Deleting it produces a gap in the numbering, a mismatch between the two parties' ledgers, and no explanation of what changed. The credit note solves that by being a second document that points at the first: same customer, referencing the original number and date, carrying the amount being reversed and the reason. Anybody reading the account later sees the sale, sees the correction and sees why. That is worth more than a tidy ledger, because tidy ledgers with no history are exactly what an auditor spends their time picking apart.
Credit note against refund
The two are often used as though they were the same transaction described differently. A credit note reduces a debt. A refund moves money back. If the customer has not yet paid, the credit note is the whole answer and no cash moves. If the customer has paid, the credit note creates a balance in their favour, and the question is whether that balance is applied to the next invoice or paid out. Customers with an ongoing relationship usually prefer it held; customers who are leaving want the cash. Consumers dealing with a fault often have a legal right to choose, and in Australia the consumer guarantees give the choice of a refund, replacement or repair depending on how serious the failure is.
The tax side, in Australia
Where the correction changes the GST already reported, the document doing the work is an adjustment note, and the credit note usually serves as one provided it carries the necessary information. A decreasing adjustment, which is what a reduction in price produces for the seller, generally requires a valid adjustment note before it can be claimed. Practically that means the credit note has to show the same class of detail as a tax invoice: who issued it, their business number, the date, what it relates to, the amount of the adjustment and the GST component. A one line note reading credit as agreed is not enough, and it is the version most small businesses issue first.
Getting the numbering and wording right
Use a separate sequence, such as CN followed by a number, so credit notes cannot be confused with invoices in either party's system. Show the amount as a positive figure under a clear heading rather than as a negative invoice, which is how the two get posted the wrong way round. Always name the original invoice number and its date. State the reason in one plain line, because a credit with no reason invites the customer's accounts team to ask, and the answer six months later depends on somebody's memory. Where only part of an invoice is credited, list the lines being reversed rather than a single lump, so the remaining balance is obvious.
When a credit note is the wrong instrument
Three cases. If the invoice was sent to the wrong entity entirely, credit it in full and reissue rather than adjusting the amount, because the debtor is wrong and no amount of arithmetic fixes that. If the customer is disputing the work rather than the arithmetic, resolve the dispute first, since a credit issued to keep the peace is an admission that is difficult to walk back. And if the sale is being cancelled before anything was supplied and nothing has been reported, it may be cleaner to void the invoice with a note explaining why, provided the accounting system supports voiding and the customer never posted it. In most other situations the credit note is the right tool. Whichever route is taken, tell the customer in writing on the day, because the gap between a correction being made and the customer hearing about it is where most payment disputes actually start.
Questions people ask
Does a credit note expire?
The document does not, but an unused credit balance sitting on a customer account can become awkward. Decide a policy: apply it to the next invoice automatically, or refund it after a stated period. Balances left indefinitely eventually raise questions about unclaimed money, and in some jurisdictions long dormant credits owed to customers have to be dealt with under specific rules.
Can a customer issue a credit note to me?
Not for your sale. A customer disputing an amount raises a debit note, which is a claim rather than a correction, and the seller then decides whether to issue a credit note in response. The exception is a recipient created tax invoice arrangement, where the buyer raises the documents and issues the adjustments too.
Should a credit note show the same tax rate as the invoice?
Yes. It reverses part of the original supply, so it carries the same treatment. If the original invoice mixed taxable and non taxable lines, the credit has to say which lines it is reversing, or the adjustment cannot be calculated correctly by either side. This is the most common source of a mismatch between two parties' returns.
What if the original invoice was never paid and never will be?
That is a bad debt rather than a credit note, and the treatment differs. A credit note says the amount was never properly owed. A bad debt says it was owed and cannot be collected, which has its own rules for recovering the tax already remitted and usually requires the debt to be written off in the accounts first.
Do I need the customer to agree before issuing one?
Not formally, since it is a reduction in their favour. It is still worth telling them, because an unexpected credit lands in their system as an unmatched document and sits there. A short email naming the invoice, the amount and the reason saves the reconciliation query that otherwise arrives at the end of the month.
Can one credit note cover several invoices?
It can, and it is usually a bad idea. Matching becomes harder for both sides, and if part of it is later disputed the allocation is unclear. One credit note per invoice keeps the trail obvious, and the extra minute spent issuing three documents is repaid the first time somebody has to reconcile the account.
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