Basics•July 10, 2026•By Bilto Team

What Is a Credit Note? When and How to Issue One

A credit note (also called a credit memo) is a document issued by a seller to reduce the amount a buyer owes. If an invoice contains an error, goods are returned, or a service was not delivered as agreed, a credit note formally adjusts the balance without voiding the original invoice.

Why Credit Notes Exist

You might wonder: why not just delete the original invoice and create a new one? There are several important reasons:

**Legal compliance**: Many tax authorities require invoices to remain in your records once issued. You cannot simply delete them. A credit note creates a proper paper trail.

**Audit trail**: Auditors need to see every financial document, including corrections. A credit note shows that an adjustment was made and why.

**Tax adjustments**: If you charged tax on the original invoice, the credit note adjusts the tax amount proportionally. This matters for GST, VAT, and sales tax reporting.

**Accounting integrity**: Your books need to balance. Deleting invoices creates gaps. Credit notes keep the records clean and complete.

Credit Note vs. Refund

These terms are related but not identical:

**Credit note**: A document that reduces the amount owed. The buyer can apply it to future invoices or request a cash refund.

**Refund**: The actual return of money to the buyer. A credit note may lead to a refund, but it can also be applied as a credit toward future purchases.

In practice, small businesses often issue a credit note and a refund simultaneously. Larger businesses may issue credit notes that accumulate and are applied to the next invoice.

When to Issue a Credit Note

1. Invoice Errors

You billed the wrong amount, used the wrong tax rate, or listed the wrong quantity. Rather than voiding the invoice, issue a credit note for the difference.

**Example**: You invoiced 10 hours at $100/hour ($1,000) but only worked 8 hours. Issue a credit note for $200.

2. Returned Goods

The client returns products that were invoiced. The credit note covers the value of the returned items.

**Example**: A client ordered 50 units at $20 each and returns 5 defective units. Issue a credit note for $100.

3. Service Not Delivered

You invoiced for a service that was partially or fully not delivered. The credit note adjusts for the undelivered portion.

**Example**: You invoiced for a full month of support but the service was unavailable for one week due to technical issues. Issue a credit note for 25% of the monthly fee.

4. Agreed Discount After Invoicing

You and the client agree on a discount after the original invoice was sent. A credit note formalizes the price adjustment.

5. Duplicate Invoice

If you accidentally sent the same invoice twice, issue a credit note to cancel one of them.

6. Contract Cancellation

If a client cancels a contract and you have already invoiced for future services, a credit note reverses the unbilled portion.

What to Include in a Credit Note

A proper credit note should contain:

**Credit note number**: Unique and sequential, separate from your invoice numbering (e.g., CN-2026-001)

**Date of issue**

**Reference to the original invoice**: Include the invoice number and date

**Your business details**: Name, address, tax ID

**Client details**: Name, address

**Reason for the credit**: A brief explanation

**Line items**: What is being credited, with quantities, unit prices, and totals

**Tax adjustment**: If the original invoice included tax, show the tax credit

**Total credit amount**

**Instructions**: Whether the credit will be applied to a future invoice or refunded

Legal Requirements

GST/VAT Considerations

If you are registered for GST or VAT:

The credit note must reference the original tax invoice

You must adjust the tax amount proportionally

The credit note must include your tax registration number

You must report the credit note in your tax return for the period it was issued

Both parties must adjust their input/output tax records

Record Retention

Keep credit notes for the same period as invoices -- typically 5-7 years depending on your jurisdiction. They are part of your financial records and may be reviewed during audits.

Sequential Numbering

Like invoices, credit notes should be numbered sequentially. Many businesses use a separate numbering series (CN-001, CN-002) to distinguish them from invoices.

How to Issue a Credit Note

**Identify the issue**: Determine why a credit is needed and calculate the correct amount.

**Create the credit note**: Use your invoicing tool or template. Tools like Bilto that support multiple invoice types can help you generate credit notes that match your invoice formatting.

**Reference the original invoice**: Always link the credit note to the specific invoice it adjusts.

**Send to the client**: Email the credit note just as you would an invoice, with a brief explanation.

**Update your records**: Record the credit note in your accounting system and adjust the client's balance.

**Adjust tax records**: If applicable, update your GST/VAT records for the current period.

Credit Note Template

CREDIT NOTE

Credit Note #: CN-2026-001

Date: July 10, 2026

Original Invoice: INV-2026-042 (dated June 15, 2026)

From: [Your Business Name]

[Your Address]

Tax ID: [Your Tax ID]

To: [Client Name]

[Client Address]

Reason: Overcharge on consulting hours -- billed 10 hours, actual hours worked were 8.

|---|---|---|---|

| Consulting hours adjustment | 2 | $150.00 | $300.00 |

| GST (10%) | | | $30.00 |

| **Total Credit** | | | **$330.00** |

This credit will be applied to your next invoice. If you prefer a direct refund, please contact us.

Common Mistakes to Avoid

**Not referencing the original invoice**: Every credit note must tie back to a specific invoice.

**Forgetting tax adjustments**: If the original invoice had tax, the credit note must adjust tax too.

**Using the wrong numbering**: Credit notes should have their own numbering sequence, not share the invoice sequence.

**Not sending it to the client**: A credit note sitting in your system does not help if the client does not know about it.

**Issuing credit notes verbally**: Always create a formal document. Verbal agreements about credits create disputes.

Conclusion

Credit notes are a standard part of professional invoicing. They keep your records clean, satisfy legal and tax requirements, and show clients that you handle corrections professionally. Whenever you need to adjust an invoice that has already been issued, reach for a credit note instead of deleting or modifying the original.

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