Singapore is raising the bar on tax compliance and the clock is ticking.
The Inland Revenue Authority of Singapore (IRAS) has rolled out the GST InvoiceNow Requirement, a phased mandate that requires GST-registered businesses to electronically transmit invoice data directly to IRAS through a standardised digital network. Whether you are a startup seeking voluntary GST registration or an established enterprise with multi-million-dollar annual supplies, the GST InvoiceNow Requirement will apply to you – it is just a matter of when.
This guide breaks down everything you need to know: what the GST InvoiceNow Requirement is, who must comply and when, how to onboard, and which businesses are excluded.
What Is the GST InvoiceNow Requirement?
The GST InvoiceNow Requirement is a mandate by IRAS under which certain GST-registered businesses must transmit invoice data electronically to IRAS using InvoiceNow-enabled accounting or invoicing systems.
InvoiceNow, introduced by the Infocomm Media Development Authority (IMDA) in 2019, is Singapore’s nationwide e-invoicing network built on the Peppol framework – a globally recognised open standard that allows e-invoices to travel directly from a seller’s system to a buyer’s system without any human intervention. As of early 2026, over 63,000 businesses are already on the InvoiceNow network, using a range of solutions from free portals to fully integrated enterprise systems.
This initiative sits within Singapore’s broader digital infrastructure program known as digital utilities, aimed at modernising how businesses manage financial data and GST compliance obligations.
Why the GST InvoiceNow Requirement Matters
The GST InvoiceNow Requirement serves three core objectives:
- Digitalise tax administration – reduce manual filing and paper-based processes
- Enhance GST compliance – give IRAS more accurate, timely invoice data
- Improve the accuracy of tax reporting – reduce discrepancies between filed GST returns and actual transaction data
Beyond compliance, businesses that adopt the GST InvoiceNow Requirement early also benefit from faster GST refunds, built-in alerts for wrongful GST charges, and reduced audit exposure, since IRAS already has the invoice data on hand.
Who Must Comply with the GST InvoiceNow Requirement – And When?
As confirmed at the Ministry of Finance Committee of Supply Debate 2026, the GST InvoiceNow Requirement will progressively extend to all GST-registered businesses in Singapore between 2028 and 2031. IRAS has structured the rollout as a tiered implementation schedule, starting with newly registering businesses and expanding to larger existing registrants over time.
| Compliance Date | Who Is Covered |
| 1 Nov 2025 | Companies registering for voluntary GST within 6 months of incorporation |
| 1 Apr 2026 | All new voluntary GST registrants |
| 1 Apr 2028 | All new compulsory GST registrants + existing GST-registered businesses with 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 |
Note on the S$200,000 threshold: While the standard GST registration threshold in Singapore is S$1 million in taxable turnover, IRAS has set S$200,000 as the starting point for phasing in existing registrants. Smaller businesses are prioritised first to give them more lead time. Total annual supplies includes standard-rated, zero-rated, and exempt supplies across all prescribed accounting periods ending in calendar year 2025.
For businesses registered before 2026, IRAS will notify each registrant of their mandatory implementation date by mid-2026. In the meantime, businesses can use the GST InvoiceNow Implementation Date Calculator on the IRAS website to self-determine their applicable date.
Which Businesses Are Excluded from the GST InvoiceNow Requirement?
Not every GST-registered entity is subject to the GST InvoiceNow Requirement. As outlined in the IRAS e-Tax Guide on Adopting the GST InvoiceNow Requirement, two categories are explicitly excluded:
1. Overseas Entities
Overseas entities – including overseas vendors required to register for GST under the Overseas Vendor Registration (OVR) Pay-Only regime and the OVR full regime – are not subject to the GST InvoiceNow Requirement.
2. Reverse Charge Businesses
Businesses that are required to register for GST solely due to the Reverse Charge mechanism are also excluded from the GST InvoiceNow Requirement.
If your business falls outside these two exemptions and is GST-registered (or will become so), you will be required to comply according to the phased schedule above.
How to Onboard to the GST InvoiceNow Requirement
Getting connected to satisfy the GST InvoiceNow Requirement involves three steps. IRAS has outlined a clear onboarding path for both off-the-shelf and enterprise system users. Note that onboarding timelines typically range from 3 to 12 months – starting early is strongly recommended.
Step 1: Choose an IMDA-Accredited Solution
Businesses can meet the GST InvoiceNow Requirement using either off-the-shelf accounting solutions (cloud or desktop-based) or in-house enterprise systems (ERP or custom platforms). Your solution provider or access point must be accredited by IMDA – this is the non-negotiable first step before any InvoiceNow transmission can take place.
Step 2: Register on the SG Peppol Directory
Using your Unique Entity Number (UEN), register your business on the SG Peppol Directory to obtain a Peppol ID. This ID enables your business to send and receive invoices through the InvoiceNow network in a standardised format, fulfilling the core technical component of the GST InvoiceNow Requirement.
Step 3: Enable the GST InvoiceNow Submission Feature
Once your system is set up and your Peppol ID is active, enable the GST InvoiceNow submission feature within your accounting or invoicing solution. This activates direct transmission of invoice data to IRAS, completing your compliance with the GST InvoiceNow Requirement.
Grants and Support Available
The government has introduced targeted financial support to keep adoption costs manageable:
- Up to S$1,000 for SMEs to defray operational costs of adopting InvoiceNow-Ready Solutions
- Up to S$5,000 for early adopters (larger businesses)
- Up to S$30,000 via the Productivity Solutions Grant (PSG) – covering up to 50% of eligible software subscription costs
- Free InvoiceNow-Ready Solutions for SMEs until March 2031
Check IRAS and IMDA for current eligibility and offerings.
Key Takeaways on the GST InvoiceNow Requirement
Whether you are a founder, CFO, or compliance officer, here is what to action:
- Check your compliance date – your deadline under the GST InvoiceNow Requirement depends on your registration type and annual supplies volume
- Start onboarding now – integration takes 3 to 12 months, especially for enterprise platforms
- Verify IMDA accreditation of your solution provider before committing to any system
- Tap available grants – SMEs can access free solutions and up to S$30,000 via PSG
- Overseas entities and reverse charge-only registrants are exempt – confirm your status if unsure
Frequently Asked Questions
What is the GST InvoiceNow Requirement in Singapore?
The GST InvoiceNow Requirement is an IRAS mandate requiring certain GST-registered businesses to electronically transmit invoice data to IRAS using InvoiceNow-enabled systems built on the Peppol framework. Announced in April 2024 and soft-launched in May 2025, it is part of Singapore’s initiative to digitalise tax administration and improve GST compliance accuracy.
When does the GST InvoiceNow Requirement take effect?
The GST InvoiceNow Requirement rollout began on 1 November 2025 for newly incorporated companies registering for GST voluntarily. It progressively extends to all GST-registered businesses by 1 April 2031. Your exact deadline depends on your registration type and total annual supplies.
Who is exempt from the GST InvoiceNow Requirement?
Overseas entities under the OVR Pay-Only and OVR full regime, and businesses registered for GST solely due to the Reverse Charge mechanism, are excluded from the GST InvoiceNow Requirement.
How long does onboarding to the GST InvoiceNow Requirement take?
Onboarding typically takes 3 to 12 months depending on your system. Off-the-shelf accounting platforms onboard faster; custom ERP systems may need close to a year. IRAS actively encourages early adoption to ensure systems are tested before compliance becomes mandatory.
Is there a free InvoiceNow solution for small businesses?
Yes. Free InvoiceNow-Ready Solutions are available to eligible SMEs until March 2031. Additional grants include up to S$1,000 for SMEs and up to S$5,000 for early-adopting larger businesses to defray adoption costs.
What is the Peppol framework?
Peppol is a globally recognised open standard for e-invoicing, used across the EU, Australia, New Zealand, Japan, and Singapore. Under the GST InvoiceNow Requirement, it enables invoices to move from a seller’s system to a buyer’s system – with a copy transmitted simultaneously to IRAS – without any manual intervention
Need Help Navigating the GST InvoiceNow Requirement?
The GST InvoiceNow Requirement represents a fundamental shift in how Singapore businesses manage tax compliance. Understanding your obligations early – and building the right systems infrastructure – will keep you ahead of regulatory deadlines and avoid last-minute scrambles.
M2K Advisors is an international tax advisory firm having offices in India, Singapore, USA & UAE. Our firm offers varied services in Singapore such as setting up companies in Singapore, nominee director services, secretarial services, GST registration, income tax filing, and Employment Pass & Visa assistance. Our hands-on expertise in corporate tax advisory & compliances, tax incentive schemes, and cross-border holding structure makes us the ideal partner for foreign investors and startups expanding into Singapore.
To know more, please drop an email to: compliance@m2kadvisors.com, mukesh@m2kadvisors.com, Info@m2kadvisors.com
This article is intended for general guidance only and should not be considered as legal or tax advice. For specific matters, reference should be made to the appropriate advisor.
