Best GST & InvoiceNow E-Invoicing Software in Singapore (2026)
GST and InvoiceNow software prepares GST returns for IRAS and sends invoice data through the InvoiceNow (Peppol) network.
Which GST & InvoiceNow e-invoicing setup fits your company?
GST-registered businesses, companies registering for GST, and finance teams preparing for InvoiceNow.
| Company size | Small (under 100 people) | Mid-size (100–1,000) | Large (1,000+) |
|---|---|---|---|
| What to prioritise | Compliance basics, bank feeds and low cost | Automation, approvals and multi-entity reporting | Controls, audit trail and consolidation |
| Typical setup | Accounting software plus a few add-ons | Accounting or ERP plus AP, expense and planning tools | ERP with an integrated finance suite |
| Time to go live | 1–4 weeks | 1–3 months | 3–9 months |
| Watch out for | Manual reconciliation creeping back in | Integration gaps between finance tools | Implementation and budget overruns |
Not sure where you fit? A 20-minute Fit Check maps your size, industry and locations to a shortlist.
Must-have features
- InvoiceNow (Peppol) sending and receiving
- Integration with accounting and ERP
- Audit trail
- Multi-entity support
Singapore-specific checks
- InvoiceNow phased requirement for GST-registered businesses
- GST rate changes and transitional rules
- Reverse charge on imported services
- IRAS e-filing
Red flags before you sign
- No InvoiceNow support
- Manual re-keying from accounting
- Unclear access point arrangements
- Per-invoice fees with high minimums
5 questions to ask before buying GST & InvoiceNow e-invoicing software
How GST & InvoiceNow e-invoicing software is priced
Monthly plans or per-invoice pricing through an accredited access point; often bundled with accounting software. SaaS Fit's advice is free for you: our fee comes from the vendor, and you never pay more than the vendor's own price.
GST & InvoiceNow e-invoicing software in Singapore: common questions
When does InvoiceNow become mandatory?
IRAS is phasing it in from November 2025, starting with newly incorporated companies registering voluntarily for GST, and extending later.
Often evaluated together
Best Accounting software
Accounting software is your books: ledgers, invoicing, bills, bank reconciliation, tax and the reports your accountant and auditors rely on.
Read the guide →Best Accounts payable automation software
AP automation captures supplier invoices, matches them to purchase orders and receipts, routes approvals, applies tax checks and pays suppliers on time.
Read the guide →Best Compliance management software
Compliance management software tracks every statutory obligation your company has, labour laws, tax, corporate filings and licences, across entities and states, with owners, due dates and proof.
Read the guide →See all Finance & accounting software guides for Singapore →
Not sure which GST & InvoiceNow e-invoicing software fits? Get a free Fit Check.
20 minutes with someone who has sold and implemented this software. You get a shortlist of 2–3 options that fit your industry, size and locations, in one to seven working days.
Book a free Fit Check Ask the AI Fit Advisor