InvoiceNow is Singapore's nationwide e-invoicing network, built on Peppol. For most businesses the practical change is smaller than the announcements suggest — and lands in a different place than expected.
What does not change
- Your GST rate, your filing periods and your F5 obligations.
- What counts as a valid tax invoice.
- Your relationship with your customer.
What does
An invoice stops being a PDF that a human reads and becomes a structured document a system validates. That is the whole shift, and everything else follows from it.
A PDF tolerates a missing UEN, a mistyped address, a line with no tax code. A structured document does not — it is rejected at the network, before your customer ever sees it.
Where the work moves to
The work moves upstream, into your master data. Customer registration numbers, tax codes on every item, unit codes on every line. Businesses that already keep that tidy barely notice the transition. Businesses that do not will spend their first month fixing records rather than sending invoices.
E-invoicing does not create bad data problems. It stops you from ignoring them.
The official scheme details are on the IRAS website.