E-invoicing compliance and regulatory updates - Singapore

Electronic Invoicing in Singapore

Is e-invoicing mandatory in Singapore ?

E-invoicing is not mandatory for B2B transactions. However, for B2G transactions, suppliers must issue e-invoices. The government may request companies to voluntarily send e-invoices.

Who is affected?

All suppliers to the public sector must issue e-invoices. GST-registered businesses will gradually be required to transmit invoice data via InvoiceNow. Newly incorporated companies and new GST registrants will be affected.

Compliance requirements

Businesses must transmit invoice data to the government’s InvoiceNow platform to comply with the mandate requirements.

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Download our Global e-invoicing and Tax Compliance fact sheet here for more information.

Key Deadlines 

• May 1, 2025: Voluntary rollout begins for GST-registered businesses
• November 1, 2025: Mandate for newly incorporated companies
• April 1, 2026: Mandate for all new voluntary GST registrants

Standards & Platforms

Platform

Singapore uses InvoiceNow, a Peppol-based national e-invoicing network managed by IMDA. Invoice data must be reported to the InvoiceNow platform via an accredited service provider.

What formats are required in Singapore?

E-invoices must follow Singapore-Peppol format as part of the InvoiceNow system.

Archiving in Singapore

What are the archiving requirements in Singapore?

Invoices must be stored for at least five years from the date of issue. Cross-border storage is allowed if invoices remain accessible and legible.

Legal invoice

For suppliers: A legal invoice is the e-invoice submitted via InvoiceNow, ensuring compliance with GST rules.

For buyers: A legal invoice is the e-invoice received via InvoiceNow, in a format that ensures integrity and authenticity (I&A).

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Key Actions  

• Prepare for the mandate – GST-registered businesses should select their accredited service providers.
• Ensure compliance – Verify invoice completeness and maintain internal controls for GST compliance.
• Store invoices properly – Retain invoice records for five years and ensure they are accessible and readable.

Singaporean e-invoicing and archiving requirements at a glance:

Supplier requirement: Singaporean suppliers must issue e-invoices via InvoiceNow when required, following GST and I&A standards.

Buyer requirement: Singaporean buyers must receive e-invoices via InvoiceNow in a format that ensures I&A.

Archiving requirement: Store invoices for five years; storage abroad is allowed if they remain accessible and legible.