Singapore requires new GST registrants to transmit invoices through InvoiceNow Peppol from April 2026.
A Lucky Plaza retailer whose till spits out CSVs. A Tanjong Pagar consultancy that has emailed PDFs for a decade. From 1 April 2026 neither clears GST (Goods and Services Tax). Invoice data must reach IRAS (Inland Revenue Authority of Singapore) through InvoiceNow — PINT-SG XML, routed via an IMDA-accredited (Infocomm Media Development Authority) Peppol Access Point.
01The pain
1 April 2026. After that date, a Lucky Plaza retailer who emails a PDF invoice has not invoiced — not in a way IRAS recognises. The Committee of Supply 2026 announcement said it plainly: invoice data has to travel through InvoiceNow in PINT-SG XML, via a certified Peppol Access Point. Newly incorporated voluntary registrants were caught on 1 November 2025; the ramp lands every April from 2028 (≤ S$200,000 turnover, ~US$148,000) through 2031 (everyone else). Free InvoiceNow-Ready Solutions only through March 2031.1
Avalara's Singapore desk flags the false-compliance trap. Only Peppol/InvoiceNow messages routed through an Access Point count — emailing PDFs or forwarding Xero exports does not reach IRAS through the network. Avalara puts the lead time at weeks to months, especially when integrations are involved. PINT-SG validation then surfaces what PDFs hid for years: wrongly-charged GST, missing identifiers, mismatched buyer and seller details. The format change drags a data-quality cleanup behind it, and the cleanup lands on a finance team of one.2
Hawksford's Singapore practice frames the multi-year shape: subscribing to an InvoiceNow-Ready Solution today is not closing a project, it is onboarding to a regime whose scope expands every April from 2028 to 2031. For the family food-and-beverage group, the Lucky Plaza shopkeeper, the consultancy on Gmail, April 2026 is the day the workflow stops being legal at the GST line.4
02Who solves this today
Singapore-active vendors that publicly self-market to the GST InvoiceNow / IMDA-accredited Peppol Access Point / PINT-SG niche on their own homepages — accounting platforms whose front pages name the regime as the operator promise. Each entry verified live and self-marketed in the niche on the date of writing. The IMDA-published InvoiceNow-Ready Solutions list itself (the regulator's own catalogue of accredited platforms) is referenced in section 01 as the regulator-published mechanic, not as a third-party solution. The list is intentionally narrow.
Listed providers publicly market to the Singapore GST InvoiceNow / IMDA-accredited / Peppol Access Point niche on their own homepages. Inclusion is not endorsement. Adjacent Singapore-active accounting / Peppol vendors were considered and excluded where their public homepage did not explicitly name the niche at the date of writing — Xero (xero.com/sg) and QuickBooks Online (quickbooks.intuit.com/sg) returned HTTP 503 / timeout on the date of writing and could not be verified against the named-niche-on-homepage rule, so they were dropped pending re-verification; AutoCount (autocountsoft.com) carried only a Malaysian "LHDN e-Invoice" reference and named no Singapore-side InvoiceNow / Peppol terms on the homepage proper; Sleek (sleek.com/sg) returned HTTP 404 at the homepage path checked on the date of writing and could not be verified; Storehub's Singapore homepage at storehub.com/sg returned HTTP 404 on the date of writing; Avalara (avalara.com/sg) timed out on the homepage path; Pagero (pagero.com) redirected to a parent corporate domain (europe.thomsonreuters.com) where the Singapore-InvoiceNow naming was not surfaced on the landing homepage. Comarch, Edicom, Pikon and Sovos are positioned as enterprise tax-tech rather than Singapore SME-facing platforms — they were dropped per the named-niche-on-homepage and SME-cohort rules. They were therefore dropped per the named-niche-on-homepage rule. IMDA's own published InvoiceNow-Ready Solutions list is the regulator's own catalogue and is referenced in section 01 as the regulator-published mechanic, not as a third-party solution provider.
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