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Credit Note in Singapore: Rules and Requirements

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Last updated at

September 30, 2025

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Credit Note in Singapore: Rules and Requirements

A credit note in Singapore is issued under the GST system and is regulated by the Inland Revenue Authority of Singapore (IRAS). A credit note is a legal document that will reduce the value of a previously issued tax invoice when goods are returned, services are cancelled, or errors are identified. It applies to businesses registered for GST and ensures that the GST reported matches the correct value of the transaction. Every GST-registered business must issue a credit note within a reasonable time and keep records for five years. This blog explains when a credit note is used, what details must be included, and compliance rules for businesses in Singapore.

What is a Credit Note in Singapore

A credit note in Singapore is a legal document issued by a supplier to adjust the value of a tax invoice that has already been issued. It will be prepared when the amount on the invoice is higher than it should be or when goods or services are returned or cancelled. The main role of a credit note is to correct the value of a transaction without creating a new invoice.

The use of a credit note will reduce the GST amount and the total of the earlier invoice. It does not charge new tax but adjusts the existing tax that was overstated. This ensures the GST reported on returns is accurate and not overstated.

If a business issued an invoice of SGD 10,000 including GST and later goods worth SGD 2,000 were returned, a credit note of SGD 2,000 will be created. Both supplier and customer must record the change so that accounts and GST returns remain accurate.

Issuance Requirements for Credit Notes

A credit note will be issued in Singapore in situations defined by the Inland Revenue Authority of Singapore. It will apply when goods are returned by a customer, services are not delivered, discounts are applied after issuing an invoice, or clerical errors are found in pricing or tax. The credit note ensures the value of the transaction and the GST reported will match the actual outcome of the sale.

If a business charged GST on items that were later cancelled or refunded, a credit note will reduce the GST liability. The document will adjust both the amount on the invoice and the tax reported to IRAS.

For example, when a customer returns defective laptops worth SGD 5,000, a credit note of the same value will be issued. The supplier and customer will record the adjustment so that accounts stay correct. Without issuing a credit note, the GST output will be overstated and penalties may apply.

Information Required on a Credit Note

The Inland Revenue Authority of Singapore requires specific information on every credit note. A credit note will include the words “Credit Note,” the supplier’s name, GST registration number, and the customer’s details. It will also include the date of issue and a unique serial number to identify the document in the accounting system.

The credit note will reference the original tax invoice and show a clear description of the goods or services being adjusted. The amount reduced and the GST adjustment will also be clearly stated. Each of these details is mandatory because the credit note legally reduces tax already declared to IRAS.

For example, if invoice number INV-001 for SGD 3,210 was issued incorrectly, a credit note for INV-001 will show the corrected reduction of the amount and GST. Businesses that fail to provide full details risk audits or disputes with customers.

Credit Note and GST Adjustment

A credit note in Singapore will adjust the GST reported by a supplier and a customer. When a credit note is issued, the supplier will reduce output tax, and the customer will reduce input tax claimed. The adjustment ensures that the GST reported on returns matches the actual value of the transaction and prevents overpayment or underpayment of tax.

The GST adjustment will be made in the return for the period in which the credit note is issued. For example, if GST for Q2 has been filed but a credit note is issued in July, the adjustment will be recorded in the Q3 return. Both supplier and customer will reflect the change in the same period to maintain correct records.

Maintaining clear and organized records of every credit note will support compliance with the Inland Revenue Authority of Singapore. Proper records will help businesses during audits, avoid penalties, and provide evidence of the adjusted GST.

Process of Issuing a Credit Note in Singapore

The process of issuing a credit note in Singapore ensures that the value of a transaction and GST reporting are corrected accurately. A credit note will be issued when an error or change in a transaction is identified and must follow specific steps to maintain compliance with the Inland Revenue Authority of Singapore.

  1. Identifying the error or change in transaction
     The supplier will first review the original invoice and identify any errors in pricing, GST, or returned goods and services. This step ensures that the reason for the adjustment is clear and documented.

  2. Preparing the credit note with all required details
     A credit note will be prepared including the words “Credit Note,” supplier and customer details, GST registration number, reference to the original invoice, description of goods or services, the amount reduced, and GST adjustment. This ensures the document is valid for accounting and tax purposes.

  3. Sending the credit note to the customer
     The supplier will issue the credit note to the customer on the date of adjustment. This will allow the customer to update their records and input tax correctly.

  4. Recording the credit note in the accounts of both supplier and customer
     Both parties will update their accounting records with the value of the credit note. The supplier will reduce sales and output tax, and the customer will reduce purchases and input tax claimed.

  5. Adjusting the GST return for the relevant period
     The adjustment of GST will be made in the return for the period in which the credit note is issued. This ensures that the GST reported to IRAS reflects the correct value of the transaction.

Record-Keeping and Compliance

Under Singapore law, all GST-registered businesses must keep records of a tax invoice, a credit note, and related documents for a minimum of five years. A credit note will be stored in the original form or in a digital format and will be available to the Inland Revenue Authority of Singapore on request. Proper storage will allow verification of records during audits or inspections and will support accurate reporting of GST.

Each credit note will have a unique and sequential serial number to ensure clear tracking of a transaction. For example, if a business issues 50 credit notes in a year, each will have a separate number so that the Inland Revenue Authority of Singapore can trace the adjustment easily.

Maintaining accurate records of a credit note will ensure compliance with GST rules and will simplify reconciliation of accounts. A business will avoid penalties, reduce disputes on transactions with customers, and ensure that GST reporting on the return is correct and complete.

Penalties for Non-Compliance

Non-compliance includes not issuing a credit note, missing required details, or failing to record it in accounts. This may lead to:

  • Payment of excess GST

  • Financial penalties from IRAS

  • Late payment charges

  • Loss of credibility with customers

Conclusion

Credit notes in Singapore are issued under the rules of the Inland Revenue Authority of Singapore and will directly affect GST compliance of a business. A credit note will correct errors on a tax invoice, reduce a tax liability, and ensure that reporting of GST on the return will be accurate. The supplier will issue a credit note promptly with all required details and will record it properly in the accounts. Failure to issue or record a credit note correctly will result in penalties and excess payment of GST on the return. 

A business that follows the rules of a credit note will maintain accurate accounts, strengthen trust with customers, review invoices carefully, issue credit notes on time, and keep records of each credit note for at least five years to remain compliant with GST regulations of Singapore.

FAQs

1. What is a credit note in Singapore?
 A credit note in Singapore is a document used to reduce the value of a tax invoice that was previously issued.

2. When must a credit note be issued in Singapore?
 A credit note in Singapore must be issued when goods are returned, services cancelled, or tax invoice errors found.

3. What details must a credit note contain in Singapore?
 A credit note in Singapore must show supplier and customer details, GST registration number, reference to original invoice, description, and GST adjustment.

4. How long must credit notes be kept in Singapore?
 Credit notes in Singapore must be kept for at least five years in paper or electronic form.

5. What happens if credit notes are not issued in Singapore?
 If credit notes are not issued in Singapore, excess GST may be paid and penalties from IRAS may apply.

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