E-invoicing in Singapore: InvoiceNow, GST and where Guliel fits

Singapore's e-invoicing network is InvoiceNow, which runs on Peppol. Under the IRAS GST InvoiceNow Requirement, GST-registered businesses send their sales and purchase invoice data to IRAS through an InvoiceNow-Ready Solution, in phases from November 2025 to April 2031. Guliel is accounting and finance-operations software, built in Singapore, that runs invoicing, expenses, purchasing, payroll, reporting and a double-entry general ledger on one engine. In Singapore today it issues GST invoices as PDF and runs payroll with CPF, SDL, FWL and self-help group funds. It does not send invoice data to InvoiceNow yet.

Status, October 2026. Documents are PDF today. Guliel has built its own Peppol access point and SMP; OpenPeppol certification is pending, and the access point is not yet connected to the app. Peppol output for Guliel documents and an accredited InvoiceNow listing are planned. Guliel is not on IMDA's list of InvoiceNow-Ready Solutions today.

InvoiceNow in short

  • InvoiceNow is Singapore's national e-invoicing network. IMDA, Singapore's Peppol Authority, sets the local specification and accredits Access Point providers.
  • The format is structured Peppol data, not a PDF. IMDA has been moving InvoiceNow from Singapore's Peppol BIS Billing 3.0 profile to the PINT SG specification.
  • The requirement covers sales invoices and purchase invoices for standard-rated and zero-rated purchases, sent to IRAS through an InvoiceNow-Ready Solution.
  • Two routes. When both parties are on the network, the seller sends a Peppol invoice and a copy goes to IRAS. When the customer is not, the seller can still issue a PDF, records it in its InvoiceNow-Ready Solution, and the solution transmits the data (solution-extracted submission).
  • No PDF conversion. IRAS's FAQ states that Access Point providers cannot convert PDF or paper invoices into Peppol format.
  • Deadline. Invoice data must reach IRAS by the earlier of the date you file the matching GST return and that return's due date.

Who has to comply, and when

From the IRAS FAQ on the GST InvoiceNow Requirement (version of 23 September 2026):

From Who
1 Nov 2025 Newly incorporated companies that apply for voluntary GST registration within six months of incorporation
1 Apr 2026 Every business that applies for new voluntary GST registration
1 Apr 2028 All new compulsory GST registrants, and existing GST-registered businesses with total annual supplies of S$200,000 or less
1 Apr 2029 Existing GST-registered businesses with total annual supplies of S$1 million or less
1 Apr 2030 Existing GST-registered businesses with total annual supplies of S$4 million or less
1 Apr 2031 Existing GST-registered businesses with total annual supplies above S$4 million

Total annual supplies means standard-rated, zero-rated and exempt supplies across your accounting periods that ended in calendar year 2025. Businesses that are not GST-registered are outside the requirement. Your accountant can confirm your phase.

What Guliel does for a Singapore business today

Everything here is live unless tagged.

Invoices and GST

  • Invoices and receipts in Guliel's Singapore GST format, as PDF, in SGD or another currency. On a foreign-currency invoice you enter the SGD exchange rate, and the PDF also shows the subtotal, GST and total in SGD, as IRAS requires. Cancelling an issued invoice issues a credit note; recording a payment issues a receipt.
  • Each invoice is titled "Tax Invoice" when your organisation is GST-registered ("Invoice" when it is not) and shows your business name and address, UEN and GST registration number (when registered), a number allocated in sequence at issue, issue and due dates, the customer's name, address and registration number, line items, subtotal, GST rate and amount, and the total.
  • GST at 9% when your organisation is GST-registered, 0% when it is not. One GST rate applies per invoice, so standard-rated and zero-rated lines go on separate invoices.
  • Set-up asks for your UEN, and for your GST registration number once you mark the organisation as GST-registered.
  • A tax report by period that groups GST by rate, and a tax-transactions listing. These are working reports; the GST F5 return is filed in myTax Portal, by you or your tax agent.

See invoicing for document types across all 39 countries.

Ledger and reports

  • A double-entry general ledger on a fixed chart of accounts, computed from the same document lines as receivables and payables. Payroll and manual journal entries post to it, and a manual entry must balance.
  • Trial balance, balance sheet, general ledger report, income statement and cash flow, among 49 report definitions.
  • A books lock date set by a manager, and a CSV export of the ledger.
  • Custom accounts in the chart of accounts (planned).

Payroll and HR

  • Singapore payroll: CPF for citizens and permanent residents by age band and PR year, SDL for every employee, FWL for Work Permit and S Pass holders, and the four self-help group funds by the employee's election. Payslip PDFs. Payroll posts to the ledger.
  • HR records, leave, attendance and timesheets. Every hour is classified as ordinary time today; Employment Act Part IV overtime rules are not applied yet.

Expenses, suppliers, API and AI

  • Receipt and bill scanning with OCR, with AI picking a category from your own list, and inbox capture from Gmail, Outlook, IMAP and POP3. A person approves each captured expense before it reaches the ledger.
  • Purchase orders and email invitations to suppliers. A supplier that accepts with its own Guliel organisation sees the purchase orders you send it and invoices against them.
  • A REST API and an MCP server with OAuth 2.1: any MCP client, such as Claude, ChatGPT or Copilot, acts within the role and scopes you grant. A built-in AI companion runs in the app. AI goes through the same API as people, so numbering at issue, totals from line items and balanced entries apply to it too.

What Guliel does not do yet in Singapore

  • Send invoice data to IRAS or Peppol invoices on InvoiceNow (planned, as above).
  • Issue a simplified tax invoice as its own format.
  • Prepare or file the GST F5 return. GST return preparation is planned.
  • Submit CPF contributions or file payroll returns.
  • Connect to bank feeds or reconcile bank statements.

If InvoiceNow already applies to you

If you registered for GST voluntarily under the 2025 or 2026 phases, your invoice data has to go through an InvoiceNow-Ready Solution now, and a Guliel PDF cannot be routed through an Access Point provider. Until Guliel is listed, issue and record those invoices in a solution on IMDA's list. If your phase starts in 2028 or later, or you are not GST-registered, that is the case Guliel serves today.

How a Singapore business starts

  1. Connect. Run Guliel beside the tool you use now. Issue documents, capture expenses, run payroll and work with suppliers in Guliel, and export the ledger as CSV for your accountant.
  2. Automate. 14 automation triggers, from invoice, expense, payment, purchase-order and stock events to overdue invoices and schedules, run API operations or webhooks.
  3. Migrate when ready. Customers come in from a spreadsheet on Guliel's template (name, tax ID, email, phone, address, city), through a column check and a staged review. There is no importer for Xero, QuickBooks, Zoho, Wave, FreshBooks, Invoice Ninja, Stripe or Shopify; keep that history in the old tool or export it from there. Connectors for all eight are planned.

Your accountant stays in the loop. Guliel prepares the records and people approve them: captured expenses wait for approval, a manager sets the books lock date, and each organisation has manager, contributor and viewer roles. A sign-off queue where an accountant approves AI work is planned. See /accountants.

Pricing

Pricing is per organisation, not per seat, in USD, and the same in every country. Free is $0 a month with 200 invoices, 100 expense scans, 10 reports and 5 automations. Standard ($20) and Premium ($99) are published prices; billing is not live and paid plans are not on sale yet.

FAQ

Do I have to use InvoiceNow today?

Only if you registered for GST voluntarily under the 2025 or 2026 phases: newly incorporated companies since 1 November 2025, and all new voluntary registrants since 1 April 2026. New compulsory registrants and existing GST-registered businesses join between 1 April 2028 and 1 April 2031, by total annual supplies. Businesses that are not GST-registered are outside the requirement.

Can Guliel send my invoices to InvoiceNow?

Not yet. Guliel issues Singapore GST invoices as PDF. Its own Peppol access point is built, awaiting OpenPeppol certification and not yet connected to the app; Peppol output and an accredited InvoiceNow listing are planned. Access Point providers cannot convert a PDF, so if the requirement applies to you now, use a listed InvoiceNow-Ready Solution for those invoices.

What GST rate does Guliel apply?

9% when your organisation is GST-registered and 0% when it is not. One rate applies per invoice, so standard-rated and zero-rated lines go on separate invoices.

Does Guliel run CPF payroll?

Yes. Singapore payroll covers CPF, SDL, FWL and the four self-help group funds, issues payslip PDFs and posts to the ledger. Guliel does not submit CPF contributions or file payroll returns.

Is Guliel accounting software?

Yes. Guliel keeps a double-entry general ledger with manual journal entries, a trial balance, a balance sheet, an income statement, cash flow, a books lock date and CSV export, on the same engine as invoicing, expenses, purchasing and payroll.

Can I issue a simplified tax invoice?

No, there is no separate simplified format. A GST-registered organisation gets the full tax invoice, whatever the amount.

Does Guliel work outside Singapore?

Yes. Guliel issues documents in the formats of 39 countries across 10 format families, in English, with Hebrew for Israel and Thai for Thailand. See /invoicing.

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