GST InvoiceNow Requirement in Singapore: Timeline & How to Prepare
By ZenMatrix · Last checked against IRAS on 31 October 2026. Always confirm your own date with IRAS.
What is GST InvoiceNow?
InvoiceNow is Singapore’s nationwide e-invoicing network based on the Peppol standard, introduced by the Infocomm Media Development Authority (IMDA) in 2019. Under the GST InvoiceNow Requirement, all GST-registered businesses must submit invoice data to IRAS using IMDA-accredited InvoiceNow-Ready Solutions. IRAS receives a copy of the invoice data through IMDA-accredited Access Point Providers.
The requirement is mandatory and is being rolled out in phases.
When do you need to comply?
| Implementation date | Who it applies to |
|---|---|
| 1 Nov 2025 | Companies that register for GST voluntarily within 6 months of incorporation date. |
| 1 Apr 2026 | Businesses that apply for voluntary GST registration on or after 1 Apr 2026, regardless of incorporation date or business structure. |
| 1 Apr 2028 | Businesses that apply for compulsory GST registration on or after 1 Apr 2028, and existing GST-registered businesses with total annual supplies ≤ S$200,000. |
| 1 Apr 2029 | Existing GST-registered businesses with total annual supplies ≤ S$1,000,000. |
| 1 Apr 2030 | Existing GST-registered businesses with total annual supplies ≤ S$4,000,000. |
| 1 Apr 2031 | Existing GST-registered businesses with total annual supplies > S$4,000,000. |
“Total annual supplies” means the total value of standard-rated, zero-rated and exempt supplies (Box 4 of the GST return) made in all prescribed accounting periods ending in calendar year 2025. IRAS also publishes an implementation date calculator on its website.
Who is exempt?
- Overseas entities, including Overseas Vendors liable to register for GST under the Overseas Vendor Registration (OVR) pay-only and full regimes
- Businesses liable to register for GST wholly due to the Reverse Charge regime
How to get started
- Check whether your accounting or ERP software is on IMDA’s list of accredited InvoiceNow-Ready Solutions.
- Get a Peppol ID: ask your InvoiceNow-Ready Solution Provider and/or Access Point provider to register your business in the SG Peppol Directory using your UEN.
- Activate the feature that submits invoice data to IRAS.
- Onboard early — IRAS encourages businesses not to wait until their implementation date.
Still choosing software? Use our InvoiceNow ERP selection checklist.
How ZenERP fits in
ZenERP is an Agentic AI cloud ERP built around Peppol connectivity and the PINT-SG invoice format. Its IMDA InvoiceNow-Ready accreditation is in progress, so please contact us for its current status before planning your onboarding.
Source
Inland Revenue Authority of Singapore, GST InvoiceNow Requirement. This guide summarises IRAS’s published information and is not tax advice.