What is a credit note and when should you issue one?

Published Friday 17 April 2026

Table of contents

• What is a credit note?
• Credit notes and refunds: what's the difference?
• How to create and process a credit note
• Integrate credit notes with accounting software
• Best practices for managing credit notes
• Streamline credit note management with Xero
• FAQs on credit notes

Key takeaways

• Issue a credit note instead of deleting an invoice whenever you need to correct an error, process a return, or cancel a payment, as UK law requires this to maintain a proper audit trail for HMRC.
• Include all required details on every credit note, such as your business and customer information, a unique reference number, the original invoice number, the amount credited, the VAT adjustment, and the reason for issuing it.
• Issue credit notes within 48 hours of identifying the need, and within 14 days for VAT purposes, to keep your cash flow accurate and maintain strong customer relationships.
• Decide whether to refund the money, apply the credit to a future invoice, or cancel an unpaid balance based on whether your customer has already paid and what works best for your ongoing relationship with them.

What is a credit note?

A credit note is a legal document that reduces or cancels the amount owed on an original invoice. You issue one when you need to correct an error, process a return, or handle a cancellation. It shows you owe money back to your customer.

Credit notes serve three main purposes:

• correct invoice errors: fix wrong amounts, pricing mistakes, or duplicate charges
• process returns: adjust accounts when customers send products back
• handle cancellations: cancel outstanding payments when services aren't delivered

Issue credit notes promptly to keep your records accurate and strengthen customer relationships.

Key reasons for issuing credit notes

You'll need to issue credit notes in several common situations. Here are the main scenarios:

• returned products: customer sends items back and needs a refund or account adjustment
• purchase cancellations: customer cancels after you've sent the invoice, so you cancel the outstanding payment
• pricing errors: you charged too much and need to show the overpayment amount
• early payment discounts: customer pays early and qualifies for a reduced balance

What happens after you issue a credit note depends on whether your customer has paid:

• unpaid invoice: the credit note cancels the amount owed
• already paid: the credit note shows a refund is due, or can offset a future purchase

Credit notes versus debit notes: how are they different?

Credit notes and debit notes work in opposite directions. Understanding the difference helps you use the right document for each situation.

• credit notes: you issue these to reduce what your customer owes
• debit notes: your customer issues these to request money back from you

Customers typically send debit notes when they:

• receive wrong or damaged products
• dispute invoice amounts
• request refunds for returned items

Both documents require the same essential information as invoices.

Legal requirements for credit notes in the UK

UK law requires you to issue a credit note rather than delete an invoice. This creates a proper audit trail for HMRC.

According to HMRC guidelines on what a credit note must contain, every credit note must include:

• business details: your name, address, and VAT number (if registered)
• customer details: the buyer's name and address
• credit note identifiers: issue date and unique identification number
• original invoice reference: invoice number and date
• financial details: amount being credited and VAT amount
• reason for issue: why you're issuing the credit note, such as a refund or cancellation

You must also follow these key compliance requirements:

• numbering: use your invoice sequence (INV-001, INV-002) or a separate sequence for credit notes (CN-001, CN-002)
• VAT: adjust VAT amounts to match the credit note value
• storage: keep all credit notes and VAT records for at least 6 years to meet HMRC requirements

Credit notes and refunds: what's the difference?

A credit note is a document that records a reduction in what your customer owes. A refund is the actual transfer of money back to your customer.

Credit notes don't automatically mean you're giving money back. You have three options:

• issue a refund: transfer money back to your customer's account
• apply to future invoices: use the credit to reduce what they owe on the next purchase
• cancel an unpaid invoice: remove the balance if they haven't paid yet

The right choice depends on your relationship with the customer and whether they've already paid the original invoice.

How to create and process a credit note

Creating a credit note takes three steps. Follow this process to ensure accuracy:

1. Identify the need: spot invoice errors, process returns, or handle cancellations as soon as possible
2. Calculate the amount: for a £200 invoice cancellation, your credit note shows -£200
3. Issue promptly: quick action prevents cash flow confusion and maintains customer relationships

You can create credit notes manually or use software. Each approach has different benefits:

• manual approach: create documents from scratch, which takes more time and risks errors
• software approach: copy invoice details automatically, reducing errors and saving time

Xero helps you create credit notes efficiently and keeps your records accurate.

Using templates and software

Accounting software like Xero reduces errors by letting you create credit notes directly from invoices.

Xero includes key features that save time:

• auto-fill: copies relevant information from the original invoice
• automatic application: applies credit notes to unpaid invoices without manual steps
• VAT calculation: adjusts tax amounts automatically
• ledger integration: updates your accounts instantly

Your financial documents stay compliant and ready for audits.

Integrate credit notes with accounting software

Xero makes credit note management faster and more accurate. The software connects all your financial records, reducing manual work and improving accuracy.

Benefits of using Xero credit notes

Xero offers key benefits for managing credit notes:

• update records automatically: your accounts adjust instantly when you create credit notes
• track changes clearly: maintain complete audit trails for accounting reviews
• store data securely: bank-level security protects your financial information
• manage customer credits: store credit balances that apply automatically to future invoices

Best practices for managing credit notes

Follow these practices to manage credit notes effectively. Good credit note management protects your cash flow and maintains customer trust.

Make sure you're timely

Issue credit notes within 48 hours of identifying the need. Delays confuse your cash flow and frustrate customers.

Quick action helps you in several ways:

• maintain accurate cash flow records
• build trust through responsive service
• prevent errors from accumulating

Review outstanding credit notes at the start of each month to catch any delays.

Keep accurate records

Every credit note needs a unique number, correct date, and complete business information.

Xero automatically adds your credit notes to sales and purchase reports, making it easy to allocate each one to the right invoice.

Reconcile credit notes in financial reports

Reconcile all credit notes regularly to keep your financial reports accurate. This makes audits and tax returns easier because every adjustment has a clear paper trail. Xero automates much of this reconciliation work for you.

Streamline credit note management with Xero

Credit notes help you correct invoices quickly while keeping customer relationships strong.

Xero makes credit note management simple. You can create credit notes directly from invoices, and your accounts update automatically. This reduces errors and saves you time on administration.

View Xero pricing plans

FAQs on credit notes

Here are answers to common questions about credit notes.

Can I delete an invoice instead of issuing a credit note?

No, you can't delete an invoice once it's been issued. UK law requires you to issue a credit note instead to maintain a proper audit trail for HMRC. This ensures your financial records remain complete and compliant.

How long do I have to issue a credit note?

You should issue a credit note as soon as you identify the need. HMRC requires you to issue a credit note within 14 days after a refund for VAT purposes. Quick action prevents cash flow confusion and maintains accurate records.

Do I need to include VAT on a credit note?

Yes, if the original invoice included VAT, your credit note must show the VAT amount being credited. The VAT on the credit note must match the proportion being credited from the original invoice.

Can I use a credit note for future purchases?

Yes, you can apply a credit note to future invoices instead of issuing a refund. This reduces the amount your customer owes on their next purchase. Make sure your customer agrees to this arrangement and track the credit balance in your accounting system.

What's the difference between a credit note and a refund receipt?

A credit note is a document that records a reduction in what your customer owes. A refund receipt is proof that you've transferred money back to your customer. You may issue both documents: the credit note to adjust the accounts, and the refund receipt to confirm the payment.