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InvoiceNow: the GST InvoiceNow Requirement for Singapore businesses, in one place

FIG. 01 — SINGAPORE BUSINESSES SENDING E-INVOICES STRAIGHT TO EACH OTHERE-INVOICE

What the GST InvoiceNow Requirement is, when it applies to your business, and what to do next.

Last verified against official sources: 14 Oct 2026
START THE CHECKLIST
01 — INVOICENOW 101

InvoiceNow
101

InvoiceNow is Singapore’s nationwide e-invoicing network. Start here: what it is, what to do first, and where to find the details.

TODAY
SUPPLIER
PDF
EMAIL
RETYPE
CUSTOMER

An invoice is a PDF or paper copy. The customer reads it and types the numbers into their own system again.

WITH INVOICENOW
SUPPLIER
NETWORK
CUSTOMER
IRAS

The invoice goes straight from the supplier’s software to the customer’s as structured data: no PDF, no retyping. For GST-registered businesses, a copy of the invoice data also goes to IRAS.

STREAMLINEDInvoices move between finance systems as structured data, with no manual sending, receipting or re-keying. [IRAS e-Tax Guide para 4.5(a)]
FEWER ERRORSLess manual work means fewer errors and rectification costs, and lower storage and retrieval costs. [IRAS e-Tax Guide para 4.5(b)]
SAVINGS$20Businesses can save up to $20 per invoice through reduced manual processing.
ERROR RATES50%Studies also show that e-invoicing can lower invoice error rates by up to 50%.
GST CHECKSInvoiceNow-Ready Solutions can build in checks that alert you to wrongful GST charges from non-GST-registered suppliers. [IRAS page]
START HERE

What to do now

0 OF 5 DONE
YOUR NEXT STEP · 1 OF 5

Find out your date

Use the calculator to see which phase you are in. IRAS should also have notified you through MyTaxMail, so go by that letter.

FIND THE DETAILS
02 — UPCOMING EVENTS

Learn it live

15 Oct 2026Adopting GST InvoiceNow RequirementThu, 2:00pm to 3:45pm · Webinar · Online · FreeSign up →Details
7 Jan 2027Adopting GST InvoiceNow RequirementThu, 2:00pm to 4:00pm · Webinar · Online · FreeSign up →Details

Listed from IRAS’s events page. Registration opens and closes on IRAS’s side, so check the page for the latest. Event list as of 14 Oct 2026.

03 — I HAVE A QUESTION

Ask the right people

This site is independent and cannot advise on your situation. For anything about your own case, use the official IRAS and IMDA contact forms below.

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