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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

Tax Categories

GST Rates

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