Singapore GST is charged at 9 % on standard-rated supplies and collected quarterly. The GST F5 return, filed through IRAS myTax Portal, requires a precise reconciliation of output tax (charged on sales) and input tax (paid on purchases) — and the InvoiceNow Peppol transaction log is the primary evidence base IRAS relies on. A mismatch between the F5 figures and the Peppol log is a common trigger for IRAS queries.
Standard-rated (9 %), zero-rated (0 %) and exempt supplies are mixed across invoices without clear coding, causing the F5 return to diverge from the InvoiceNow Peppol log and requiring manual corrections before filing.
GST rate applied per line item based on supply type and customer country, with a split input/output ledger that mirrors the IRAS F5 return structure exactly.
Every quarter, the accounts team spends several days collating input and output GST from invoices, purchase orders and bank statements before the F5 can be filed — a process that resets each cycle.
Live GST ledger updated with every invoice and purchase, producing a one-click export in the IRAS F5 format ready for myTax Portal submission.
Correct rates, automatic ledger, IRAS-ready export — no last-minute reconciliation scramble.
