Singapore e-invoicing explained — the GST InvoiceNow Requirement: Peppol-based InvoiceNow with IRAS as the 5th corner, mandatory for new voluntary GST registrants since 1 November 2025 and 1 April 2026, extending to all GST-registered businesses from 1 April 2028 to 1 April 2031 by 2025 turnover band, PINT-SG format, who is excluded, deadlines, onboarding and sanctions.
Find out how to verify GST Reg Number in Singapore. Use Lookuptax for hassle-free validation of GST Reg Number in Singapore.
How to verify a Singapore UEN (Unique Entity Number) using the UEN portal or ACRA Bizfile. Covers UEN format by entity type, GST vs UEN distinction, Cancelled status, and ACRA API access.
Learn about GST rules and guidelines in Singapore for businesses with our country guide — the 9% standard rate, the SGD 1 million registration threshold, reverse charge and Overseas Vendor Registration for cross-border services, invoice requirements, and the phased GST InvoiceNow (Peppol) e-invoicing mandate running from 2025 to 2031.
Learn about TIN number in Singapore. Use Lookuptax for hassle-free tax id validation in Singapore and other 100+ countries