May 2026
InvoiceNow is Singapore's national e-invoicing network, mandated by IRAS for all GST-registered businesses. New voluntary GST registrants must comply from 1 April 2026. Existing businesses must comply by 1 April 2031.
Last updated: May 2026 — expanded with the latest IRAS rollout timelines, government grants, and Jaz setup steps.
InvoiceNow is Singapore's national e-invoicing network, mandated by IRAS for all GST-registered businesses. From 1 April 2026, all new voluntary GST registrants must transmit invoice data to IRAS via InvoiceNow. Existing GST-registered businesses must comply in phases between 2028 and 2031, with full adoption required by 1 April 2031.
This guide covers what InvoiceNow is, how it differs from emailing a PDF invoice, who needs to comply and when, the business benefits of adoption, and how to get set up on Jaz.
InvoiceNow is Singapore's national e-invoicing network, built on the international Peppol standard and operated under IMDA (Infocomm Media Development Authority) authority. It connects businesses through accredited solution providers, transmitting structured invoice data directly between accounting systems — without PDFs, manual re-entry, or email attachments. Peppol (Pan-European Public Procurement On-Line) is the underlying global framework, used across Singapore, Australia, Europe, and over 40 countries.
Businesses connect to InvoiceNow through an InvoiceNow Ready Solution Provider (IRSP) — an IMDA-certified accounting or invoicing platform. When a business sends a Peppol e-invoice, the structured data file travels through the IRSP's access point directly into the recipient's accounting system. No document is attached. No data is re-entered. The recipient's system receives pre-populated invoice data, ready for approval.
GST InvoiceNow is the IRAS requirement built on top of the network. Under GST InvoiceNow, GST-registered businesses must transmit structured invoice data to IRAS at the point of invoicing. This means invoice data flows simultaneously from your accounting software to your customer and to IRAS — eliminating the gap between what you invoice and what you report for GST purposes.
E-invoicing via InvoiceNow and emailing a PDF invoice are not the same thing. Emailing a PDF — even one generated by accounting software — does not satisfy Singapore's InvoiceNow mandate. The mandate requires structured data transmission via the Peppol network. A PDF is a document. An InvoiceNow e-invoice is structured data.
When a PDF invoice is emailed, the recipient receives a visual representation of invoice information. Their accounts payable team must manually read it, key the data into their accounting system, and reconcile it against purchase orders. This introduces transcription errors, creates processing delays, and generates no data trail accessible to IRAS. The entire process is manual at both ends, regardless of how the PDF was created.
An InvoiceNow e-invoice transmits discrete, machine-readable data fields — line items, amounts, tax codes, supplier details, payment terms — directly into the recipient's accounting system via the Peppol network. IRAS simultaneously receives the GST data for that transaction in real time. No manual re-entry occurs at any point. The recipient's system populates automatically, the GST data is filed without a separate submission, and both parties have a timestamped network record of the transaction. This is what the mandate requires and what email invoicing cannot replicate.
All GST-registered businesses in Singapore are required to adopt InvoiceNow. IRAS is phasing in the mandate across six years, with scope expanding from newly registered businesses first to all existing GST-registered businesses by 2031.
From 1 November 2025, newly incorporated companies that voluntarily registered for GST must use InvoiceNow from their registration date. From 1 April 2026, this extends to all new voluntary GST registrants — regardless of business structure or incorporation date. Any business that registers for GST voluntarily on or after 1 April 2026 is in scope immediately upon registration.
From 2028 to 2031, existing GST-registered businesses will be phased in. IRAS will announce the exact staging, expected to be structured by business size and sector. Full adoption is required by 1 April 2031. Businesses already on the GST register should not assume they have until 2031 to prepare — some existing registrants will be required to comply from 2028 and will receive advance notice of their deadline from IRAS.
InvoiceNow adoption reduces payment cycles, eliminates invoicing errors, simplifies GST compliance, and creates a verifiable audit trail — operational benefits that begin from day one, not just at the compliance deadline.
Payments typically settle 5–10 days faster on e-invoiced transactions. Structured invoice data arrives pre-populated in the recipient's accounting system, bypassing manual processing queues and moving directly to the approval stage. For businesses with high invoice volumes or tight cash flow cycles, this materially improves working capital without changing payment terms. Invoicing errors — transposition mistakes, mismatched line items, missing tax codes — are eliminated because data is transmitted exactly as created, with no re-entry step at either end.
GST reporting becomes significantly lighter under InvoiceNow. Transaction data is transmitted to IRAS at the point of invoicing, substantially pre-populating your GST return. Manual reconciliation between your invoice records and your GST F5 or F7 filing is reduced. Every Peppol e-invoice also generates a timestamped, immutable record on the network — a complete digital audit trail that satisfies IRAS audit requirements without separate invoice archiving. Businesses that currently maintain duplicate invoice records for compliance purposes will find this consolidation particularly valuable.
Early adoption qualifies businesses for government grants before mandatory deadlines arrive. Enterprises that adopt InvoiceNow ahead of their required phase can receive up to $5,000 in adoption support. SMEs can receive up to $1,000 to offset operational transition costs. IMDA will release detailed eligibility criteria for these grants in mid-2026. Businesses should begin exploring IRSP options now to position themselves for grant eligibility when details are confirmed.
Beyond grants, early adopters gain a procurement advantage on the Peppol network. Larger enterprise buyers and government-linked companies increasingly prefer — and in some procurement contexts require — suppliers that are already InvoiceNow-ready. Being on the network removes a friction point in supplier onboarding and makes your business a faster counterparty to transact with. Businesses that wait until the mandate forces their hand will be competing for IRSP onboarding capacity at the same time as every other SME in their cohort, with less time to test their setup before live trading.
The setup process itself takes less than one business day on an IRSP-certified platform like Jaz. Starting early means absorbing the learning curve — how Peppol IDs work, how your customers receive structured invoices, how GST data flows to IRAS — on your own schedule, without a compliance deadline compressing the process.
Jaz is an InvoiceNow Ready Solution Provider (IRSP), certified by IMDA. InvoiceNow is built natively into Jaz — not as a third-party integration or add-on, but as a core part of the invoicing workflow on Essentials and Growth plans. Businesses on Jaz can enable InvoiceNow directly from their account without purchasing additional software or connecting external services.
When InvoiceNow is active on Jaz, outbound invoices are transmitted via the Peppol network to your customer's accounting system and to IRAS simultaneously — either at the point of invoicing or in a scheduled batch. Inbound e-invoices from suppliers also on the Peppol network arrive in Jaz pre-structured and ready to convert into draft bills. Compliance status across all InvoiceNow activity is tracked in one place, with a full record of what was transmitted, when, and to whom.
Jaz also handles Peppol ID registration automatically. Once you activate InvoiceNow through your account, your Peppol ID — derived from your UEN — is registered on the network without any separate coordination with an access point provider. Your ID appears under Organisation Details once authorisation is confirmed and is immediately usable for live transactions.
Setting up InvoiceNow on Jaz takes less than one business day for most businesses. The process requires three steps: enabling the feature, authorising via Corppass, and confirming your Peppol ID is active.
Log in to Jaz and go to Mailbox in your account settings. Enable InvoiceNow and/or GST InvoiceNow depending on your requirements. Jaz will initiate the Corppass authorisation flow — you will receive one or more emails with authorisation steps to complete using your Corppass credentials. Once Corppass authorisation is confirmed, your Peppol ID will automatically appear under Organisation Details. Your account is then live on the InvoiceNow network and ready to transact.
If you are not yet on Jaz, book a demo to see the InvoiceNow workflow in full — including how inbound supplier e-invoices arrive as draft bills, how outbound invoice transmission to IRAS works, and how compliance status is tracked across your account.
InvoiceNow is Singapore's national Peppol-based e-invoicing network, operated under IMDA authority. It enables GST-registered businesses to exchange structured invoice data directly between accounting systems and transmit GST transaction data to IRAS automatically at the point of invoicing.
All GST-registered businesses in Singapore are required to adopt InvoiceNow. New voluntary GST registrants must comply from 1 April 2026. Existing GST-registered businesses will be phased in between 2028 and 2031, with full mandatory adoption by 1 April 2031.
No. Emailing a PDF invoice does not satisfy the InvoiceNow mandate. The mandate requires structured data transmission via the Peppol network. A PDF is a document, not structured machine-readable data, and cannot be processed by InvoiceNow.
A Peppol ID is a unique identifier that registers a business on the InvoiceNow network. In Singapore, it is derived from your UEN. Once registered, other businesses on the Peppol network can send structured e-invoices directly to your accounting system using your Peppol ID.
An InvoiceNow Ready Solution Provider (IRSP) is an IMDA-certified accounting or invoicing platform that provides access to the InvoiceNow Peppol network. Businesses must use an IRSP-certified solution to comply with the mandate. Jaz is a certified IRSP.
Yes. Enterprises that adopt InvoiceNow early can receive up to $5,000 in government support. SMEs can receive up to $1,000 to offset transition costs. IMDA will release full eligibility details in mid-2026.
For most businesses already using Jaz, InvoiceNow setup takes less than one business day — enable InvoiceNow under Mailbox, complete Corppass authorisation, and your Peppol ID activates automatically under Organisation Details.
Non-compliance with IRAS's InvoiceNow requirement may attract penalties under the GST Act. Businesses in scope from 1 April 2026 should treat the mandate as a hard compliance deadline. Confirm current enforcement guidance at iras.gov.sg.
Yes. If a supplier is also on the Peppol network, their invoices will arrive in your Jaz account pre-structured and ready to convert into draft bills — no manual data entry required.
InvoiceNow is the Peppol network used for business-to-business e-invoice exchange. GST InvoiceNow is the IRAS requirement for GST-registered businesses to transmit invoice data to IRAS via that network. Both operate on the same infrastructure and are enabled together on Jaz.
InvoiceNow is mandatory for all new voluntary GST registrants from 1 April 2026. Existing GST-registered businesses must comply in phases from 2028, with full adoption required by 1 April 2031. Emailing a PDF invoice does not satisfy the mandate — structured Peppol transmission via an IRSP-certified solution is required.
Early adoption qualifies enterprises for government support of up to $5,000, and SMEs for up to $1,000, reducing the cost of transition. Being on the network ahead of your deadline also positions your business as a preferred counterparty for enterprise buyers already operating on Peppol. The compliance window for existing businesses is open, but is not indefinite.
Log in to Jaz to enable InvoiceNow, or book a demo to see how it works.
Photo by Glenn Carstens-Peters on Unsplash
