• Last edited on: 16 November 2020


Examples of compliant cXML invoices and credit notes for Singapore.


The invoice requirements for Singapore are laid out in the GST Act 1994.

General notes

When setting up your remit-to address , your Goods and Sales Tax ID (GST ID) must be in one of the following formats:

  • X12345678X
  • 123456789X
  • X123456789
  • 9 characters, for example, 12345678X
  • XY12345678

All tax and total amounts must include the alternateAmount and alternateCurrency attributes. The alternate currency must be set to SGD . See Providing Amounts in Local Currency for more info.

When adding a tax exempt line or creating a reverse change invoice, add this element to your cXML: <Description xml:lang="en-US">Line level exemption reason</Description>

Include the <Description> element immediately after <tax-amount>. It's required when the TaxDetails category contains an exemption. See Add Tax Exemption Details to an Invoice fore more info.

Invoice content requirements

Invoice Content Field Mandatory/Conditional Comments
Supplier Name Mandatory The full name of the supplier
Supplier Address Mandatory The address of the supplier
Supplier Tax Reg. Number Mandatory The GST registration number of the supplier
Buyer Name Mandatory The full name of the buyer
Buyer Address Mandatory The address of the buyer
Invoice Date Mandatory The date of issue of the invoice
Invoice Number Mandatory The number under which the invoice is mentioned in the sales journal of the supplier
Invoice Currency Recommended The currency which is used in the transaction
Local Currency Mandatory The local currency
Local Currency Net Mandatory The amount payable (GST excluded) in SGD
Local Currency Tax Mandatory The GST amount expressed in SGD
Local Currency Gross Mandatory The amount payable (GST included) in SGD
Exchange Rate Recommended The exchange rate between SGD and the currency which is used in the transaction
Original Invoice Number Conditional The original invoice number
Original Invoice Date Conditional The original invoice date
Credit Reason Conditional Reason for issuing a credit note
Early Payment Discount Conditional The discount received in case of early payment
Quantity Supplied Mandatory The quantity of the goods supplied or the extent and nature of the services rendered
Precise Descriptrion of Supply Mandatory Display the description/ nature of the goods or services
Taxable Amount Mandatory Mandatory per GST rate or exemption (expressed in any currency)
Tax Rate Mandatory Applicable GST rate (per good/ service)
Tax Amount Mandatory GST payable
Unit Price Mandatory Exclusive of GST
Discount Amount Conditional The total discount amount
Discount terms Conditional The total discount amount
Tax Invoice Mandatory The words "Tax Invoice"
Customer Accounting Conditional

As of January 1, 2019, Singapore introduced a new customer accounting scheme whereby the buyer rather than the seller will need to account for GST on purchases of mobile phones, smart cards and software exceeding SGP 10,000. This requirement only applies to GST registered taxpayers and domestic transactions. Where a sale falls within the scope of the customer accounting requirement, the invoice will need to clearly state the GST amount the customer needs to account via the following statement:

"Sale made under customer accounting. Customer to account for GST of $X."

Extrinsic fields

The following extrinsics are required to send a compliance-assured Singaporean invoice. You may require additional extrinsics specific to your industry or billing situation:

  • ExchangeRate

Other extrinsics may be required based on your specific invoicing scenario. See Adding Extrinsics to Your Invoice for more info.

Example invoices