Singapore

Singapore’s tax system includes a Goods and Services Tax (GST) administered by the Inland Revenue Authority of Singapore (IRAS). Zero-rated supplies apply to international services and exports. Exempt supplies include financial services, sale and lease of residential properties, digital payment tokens, and investment precious metals.

Businesses are identified by their Unique Entity Number (UEN). GST-registered suppliers must display their GST Registration Number on all tax invoices, which in most cases is the same as the UEN.

Three invoicing methods are supported: tax invoices (standard, requiring full supplier and customer details), simplified tax invoices (for transactions up to 1000 SGD inclusive of GST), and receipts (for non-GST-registered customers). Credit notes are supported for correcting invoices; debit notes in Singapore are used for requesting payment on non-GST transactions, not for invoice corrections.

Base Details

Key	Value
Tax Country Code	SG
Currency	SGD
Base Time Zone	Asia/Singapore

Tax Categories

Code	Name	Title
GST	GST	Goods and Services Tax

GST Rates

Rate	Keys	Name	Percents	Description
general	standard	General rate	9%	GST-registered businesses are required to charge and account for GST at 9% on all sales of goods and services in Singapore unless the sale can be zero-rated or exempted under the GST law.

Correction Definitions

Auto-generation of corrective invoices or credit and debit notes is supported.

Invoice Types

The types of invoices that can be created with a preceding definition:

• credit-note

Validation Rules

bill.Invoice

Field	Test	Validation Code / Message
supplier	Context: regime in [SG] Has GST tax ID code or UEN identity	GOBL-SG-BILL-INVOICE-01 Invoice supplier in Singapore must have a GST tax ID code or a UEN identity

org.Identity

Field	Test	Validation Code / Message
code	Type in [UEN] Valid UEN	GOBL-SG-ORG-IDENTITY-01 Identity code for type UEN must be valid

tax.Identity

Field	Test	Validation Code / Message
code	Code in [SG] Valid	GOBL-SG-TAX-IDENTITY-01 Invalid Singaporean tax identity code