If your company is GST-registered in Singapore, InvoiceNow is no longer an optional upgrade you can leave for “someday.” Following the Committee of Supply 2026 announcement, the Inland Revenue Authority of Singapore (IRAS) has confirmed that GST InvoiceNow will be extended in phases to every GST-registered business in Singapore, with full mandatory adoption by 1 April 2031. The rollout starts far sooner than most business owners realise, and the earliest phases are already in motion.
For many small and mid-sized companies, this is not simply a software update. It touches how invoices are issued, how accounting systems are configured, how staff are trained, and how closely your GST filings need to be reconciled with real-time transaction data flowing to IRAS. Businesses that start planning now, well ahead of their compliance deadline, will have an easier and cheaper transition than those that scramble in the final quarter before their phase kicks in.
This article sets out the confirmed phased timeline from 2025 to 2031, explains how InvoiceNow actually works on the Peppol network, summarises the transitional grants available to offset onboarding costs, and gives you a practical action plan organised around when your business needs to be ready.
What Is GST InvoiceNow, and Why Is It Becoming Mandatory?
InvoiceNow is Singapore’s nationwide e-invoicing network, built on Peppol, an international standard for structured electronic document exchange. Instead of emailing PDF invoices or issuing paper copies, businesses on InvoiceNow transmit invoice data directly, structured, machine-readable and standardised, between accounting systems via an accredited Access Point provider.
The “GST InvoiceNow requirement” specifically refers to IRAS mandating that GST-registered businesses use InvoiceNow-compatible solutions to record transactions and transmit invoice data directly to IRAS for tax administration purposes. The stated aims are to reduce compliance costs over time, improve the accuracy of GST reporting, cut down on invoice fraud and errors, and give IRAS earlier visibility of transaction data to streamline audits and refunds.
The requirement was first introduced for new voluntary GST registrants and is now being extended, phase by phase, to cover the entire GST-registered population, including companies that have been GST-registered for years under compulsory registration.
The PINT-SG Format and Access Points
Under the requirement, invoice data must be transmitted using the PINT-SG format, Singapore’s localised version of the Peppol International (PINT) invoice specification. Businesses do not connect to the Peppol network directly. Instead, they route their invoice data through an accredited Access Point provider, typically their accounting or invoicing software vendor, which has been certified to handle PINT-SG transmission and connect to IRAS’s systems. Choosing (or confirming) an Access Point provider that is InvoiceNow-ready is one of the first practical steps for any business preparing for its compliance deadline.
The Full Phased Timeline: 2025 to 2031
The rollout is staggered by business type and by annual taxable supplies, giving smaller businesses more time before their compliance deadline arrives. The table below sets out the confirmed phases as announced at Committee of Supply 2026.
| Effective Date | Who Is Covered |
|---|---|
| 1 November 2025 | New voluntary GST registrants (companies registering for GST voluntarily within a defined window of incorporation) |
| 1 April 2026 | All new voluntary GST registrants, regardless of business structure or incorporation date |
| 1 April 2028 | New compulsory GST registrants, and existing GST-registered businesses with annual taxable supplies up to S$200,000 |
| 1 April 2029 | Existing GST-registered businesses with annual taxable supplies up to S$1 million |
| 1 April 2030 | Existing GST-registered businesses with annual taxable supplies up to S$4 million |
| 1 April 2031 | All remaining GST-registered businesses, completing the nationwide rollout |
The key point for existing businesses is that your compliance deadline is tied to your annual taxable supplies, not simply your GST registration date. A company that has been GST-registered since 2015 with S$3 million in annual taxable supplies falls into the 1 April 2030 phase, not the final 2031 phase, so it pays to check where your business actually sits rather than assuming you have until the last possible date.
Transitional Grants to Offset Onboarding Costs
Recognising that onboarding costs and system changes can be a real burden, particularly for smaller companies, the Government has introduced transitional funding to cushion the transition. Broadly, support has been structured by business size: up to S$1,000 for SMEs that activate GST InvoiceNow and submit invoice data before their applicable deadline, with higher support available for larger businesses connecting via an Access Point, and additional support for larger enterprises integrating their own ERP systems with InvoiceNow. Grant quantums, qualifying periods and conditions are periodically updated, so businesses should always check the current terms on the IRAS website before budgeting around a specific figure, and apply well before their own compliance deadline since some grants are available on a first-come basis until funds are disbursed.
Businesses should also note that free or subsidised InvoiceNow-ready accounting solutions are being made available to SMEs during the transition window, which can materially reduce the cost of compliance for smaller companies that do not currently use accounting software with InvoiceNow capability.
What Your Business Should Do to Prepare
Regardless of which phase applies to you, the practical preparation steps are broadly the same. The earlier you start, the more choice you have over software, timelines and cost.
| Action | Why It Matters |
|---|---|
| Confirm your compliance deadline based on annual taxable supplies | Determines how much runway you have and when to budget for the transition |
| Check whether your current accounting software is InvoiceNow-ready | Many mainstream cloud accounting platforms already support PINT-SG; older or purely manual systems will need replacement or an add-on |
| Select an accredited Access Point provider | Invoice data cannot be transmitted to IRAS without a certified Access Point in the chain |
| Review invoicing workflows and master data | Structured e-invoicing is unforgiving of incomplete customer records, wrong tax codes or inconsistent product descriptions |
| Train finance and sales staff on the new invoicing process | Staff issuing invoices manually today will need a new routine, and errors caught early cost far less than errors caught during a GST audit |
| Apply for available transitional grants before your deadline | Grants typically require activation and submission before the applicable compliance date, not after |
| Reassess related tax and compliance obligations in parallel | InvoiceNow onboarding is a good trigger to review broader tax positions, such as withholding tax compliance and available corporate tax rebates and exemptions |
Don’t Treat This as an IT-Only Project
A common mistake is to treat InvoiceNow onboarding purely as a system upgrade handled by IT or an external vendor. In practice, it changes how finance, sales and operations teams issue and record invoices day to day. Businesses that only involve their accounting function at the last minute often find themselves rushing master data clean-up and staff training in the weeks before their deadline. Building InvoiceNow readiness into your broader digitalisation and financing plans, including funding support such as the Enterprise Financing Scheme or the SME cash grant payout, can help spread the cost and effort more sensibly across the year.
Frequently Asked Questions
Is GST InvoiceNow the same as issuing e-invoices for every sale?
Not quite. The requirement is about transmitting invoice data to IRAS in a structured format via InvoiceNow and an accredited Access Point, which typically happens alongside your normal invoicing process rather than replacing customer-facing invoices entirely. The mechanics depend on your accounting software and Access Point provider.
What happens if my business misses its compliance deadline?
IRAS has set out phased deadlines precisely to give businesses adequate notice, and non-compliance risks penalties and closer scrutiny of GST filings. Businesses that are unsure of their obligations, or that anticipate difficulty meeting their deadline, should engage with IRAS or a qualified tax adviser well in advance rather than waiting until the deadline has passed.
Do voluntary GST registrants really need to comply before compulsory registrants?
Yes. New voluntary GST registrants were brought into scope from 1 November 2025, with all new voluntary registrants covered from 1 April 2026, well ahead of the 2028 to 2031 phases for existing and compulsory registrants. This reflects that voluntary registrants are, by definition, opting into the GST system and are expected to adopt digital tools alongside registration.
Can smaller companies claim more than one grant?
Grant eligibility, quantum and qualifying periods are set by IRAS and partner agencies and may be updated over time. Businesses should verify current eligibility criteria directly on the IRAS website before assuming a particular grant applies, and should not delay onboarding while waiting for grant clarity, since compliance deadlines are fixed regardless of grant status.
Conclusion: Start Planning Before Your Phase Arrives
The GST InvoiceNow rollout to 2031 is one of the most significant compliance shifts for GST-registered businesses in Singapore in recent years. While the final deadline is still some years away for larger businesses, the phases affecting smaller and newly registered businesses are already underway, and the businesses that plan early consistently spend less, disrupt their operations less, and avoid the last-minute rush that tends to accompany major compliance deadlines.
Raffles Corporate Services helps Singapore businesses navigate GST compliance, corporate tax and broader regulatory change with practical, up-to-date guidance. If you would like help assessing your GST InvoiceNow compliance deadline, reviewing your accounting systems, or planning your broader tax and grant strategy for the year ahead, visit Raffles Corporate Services to speak with our team.
The Editorial Team, Raffles Corporate Services