What is a B2B ecosystem?
Business apps that belong to one platform and share the account and the data, instead of being wired together through paid integrations.
Singapore · IRAS · InvoiceNow · GST 9 %
Run your Singapore company on the InvoiceNow standard — from ACRA incorporation to ASEAN expansion.
IRAS has made InvoiceNow the national e-invoicing backbone: every GST-registered business must exchange invoices over the Peppol network in UBL format. Layer in a 9 % GST regime, CPF as the statutory payroll framework, PayNow as the dominant payment rail, and ACRA as the company registry, and these rules shape every business decision. The 4b2b suite offers general online tools around them (PDF invoicing and an invoice archive, SMS and e-mail notifications, CRM, HR records, hosting), but it does not connect to IRAS, ACRA, PayNow or the Peppol network.
Explore the topic map →Illustrative overview (not measured data)4B2B · LEDGER VIEW
18
Topics
3
Clusters
1
Markets
InvoicingAccountingPayrollOther
Illustrative trend (not measured data)
Currency
SGD
GST
9 %
Trade bloc
ASEAN
Registry
ACRA / BizFile+
Start with the services you can use today
Subscribe online to the first applications of the 4b2b ecosystem, then add more modules to the same account whenever you need them.
Invoicing
Issue and manage invoices online, with plans that start with a free trial period.
from €1 /month
Hosting
cPanel hosting, VPS, dedicated and GPU servers on fast NVMe storage.
from €5 /month
Price monitoring
Track your competitors' prices for your products, with alerts and price recommendations.
from €2 /month
Notifications
Send SMS, e-mail and WhatsApp notifications to your customers from one place.
from €49 /month
What makes Singapore different
What Singapore requires: InvoiceNow, 9 % GST and CPF.
Singapore did not merely adopt Peppol: it built InvoiceNow around it, with IRAS as the reference authority. Every invoice, quarterly GST F5 return and payroll run sits inside this framework. The 4b2b products do not connect to IRAS, InvoiceNow or CPF Board; this section explains the rules so you know what to do at the source.
IRAS-INVOICENOWIRAS / InvoiceNow mandateIRAS endorses InvoiceNow as the national e-invoicing standard. GST-registered businesses — and progressively all businesses — must transmit invoices over the Peppol network in UBL 2.1 format. The Peppol AS4 protocol provides cryptographic delivery confirmation and a tamper-evident audit trail.
GST-9GST at 9 %Standard-rated supplies carry GST at 9 %. Exported goods and qualifying international services are zero-rated; residential property and most financial services are exempt. Quarterly GST F5 returns are filed through IRAS myTax Portal — input and output tax must reconcile exactly with the InvoiceNow transaction log.
SGD-PAYNOWSGD · PayNow · global hubPayNow — Singapore's Peppol-era instant-payment rail — lets businesses receive funds via UEN or mobile number within seconds. SGD is the functional currency for all local transactions, while multi-currency invoicing is standard for cross-border clients. Singapore's AAA sovereign rating and open capital account make SGD a trusted settlement currency across ASEAN.
ASEAN-ACRAACRA registry · ASEAN gatewayACRA maintains the authoritative company register via BizFile+, assigning every entity a UEN that anchors its identity across IRAS, CPF, MOM and InvoiceNow. As an ASEAN founding member and Peppol pioneer, Singapore-incorporated entities enjoy preferential market access — and UEN-based invoicing — across the bloc.
01 · COMPANY FORMATION
Company Formation & Registration
Incorporating in Singapore involves more than filing an ACRA form. From the day the UEN is issued, the company enters the InvoiceNow Peppol ecosystem, the GST regime and the CPF payroll framework. These six topics walk through each step — and how the 4b2b suite slots in at each one.
6 · Open →
02 · OPERATIONS
Operations — GST 9 %, InvoiceNow, CPF Payroll, PayNow
The operational rhythm of a Singapore company: a 9 % GST regime with quarterly F5 returns, InvoiceNow Peppol transmission required for every taxable invoice, CPF contributions due monthly for every locally employed staff member, and PayNow as the dominant payment rail. These six topics cover each obligation in detail.
6 · Open →
03 · CROSS-BORDER
Cross-border — ASEAN, Exports & Regional HQ
Singapore sits at the intersection of the global Peppol network and the ASEAN economic bloc — a founding ASEAN member with over 100 double taxation agreements, a zero-rated GST regime for exports, and an internationally recognised legal system for holding regional IP and treasury functions. These six topics address each cross-border dimension in detail.
6 · Open →
How the 4b2b modules fit together for a Singapore company
Each product is subscribed and managed on its own brand domain: billing, support and licensing all live there. This view shows the general tools available to a Singapore-registered business. They do not connect to IRAS, InvoiceNow or CPF Board.
4appointments.netOnline booking and appointment scheduling for service businesses.4buildsite.netWebsite and online-store builder with ready-made templates.4hosting.netReliable hosting and VPS infrastructure tailored for the 4b2b stack and partner deployments.4invoices.netInvoicing in 73 countries: PDF invoices, numbering, client records and payment links, with ANAF e-Factura integration in Romania.4mystaff.netTime tracking and shift scheduling for teams.4notify.netSMS and WhatsApp notifications, with an API to send them from your own applications.4pricing.netPrice comparison: monitor competitors and adjust the prices in your online store.4shopy.netE-commerce platform to launch and run your online shop.
Open standards at the core
Built on a REST API, Webhooks, PDF invoices and e-mail and SMS. The Peppol, UBL and ISO 20022 standards are listed for information only: the ecosystem has no connection to IRAS, ACRA, PayNow or the Peppol network.
Local e-invoicing standards (informational)
InvoiceNow (Peppol)Peppol BIS 3.0UBL 2.1ISO 20022
Integrations
REST APIWebhooksPDF invoicesE-mail and SMS
Infrastructure
Hosting in EU data centres
Built for accounting firms, corporate secretaries and law practices
Accounting firms and professional advisers in Singapore manage portfolios of clients through ACRA, IRAS, InvoiceNow, CPF Board and MOM. The ecosystem offers general tools (PDF invoices and archive, CRM, HR records, notifications); filings with those agencies are made in their own portals.
Accounting firms
Keep client invoices in PDF with an invoice archive, and use CRM and e-mail or SMS for client communication. GST F5 filings, CPF submissions and InvoiceNow transmissions are made in the IRAS, CPF Board and Peppol access-point channels.
Law firms
Issue fee invoices as PDF and archive them, and keep client contacts in a CRM. GST treatment and ACRA or CorpPass filings remain your responsibility, handled in the official portals.
Corporate secretaries
Record each client's UEN in your own records and keep client contacts and documents organised. ACRA filings and CorpPass authorisations are handled in BizFile+ and CorpPass, not in the 4b2b products.
IT agencies
Invoice international clients with PDF invoices and an archive, and hold the CRM and hosting side in the same ecosystem. GST zero-rating decisions and Peppol delivery are outside the products.
The 4b2b ecosystem
Why an ecosystem instead of separate apps
The 4b2b ecosystem is a group of business apps that share one account, one company record and one customer record. You switch on only the modules you need, and anything entered once shows up everywhere else — from invoicing through contracts to timesheets.
- One login for every module, with permissions set per role.
- Company and customer details are entered once, not six times.
- One subscription, with modules you turn on as you go.
- Local tax compliance included on every market we open.
Questions about the ecosystem
Short answers to what small companies ask most often before choosing. Each one has its own page, with worked examples and the mistakes to avoid.
What is the 4b2b ecosystem?
Invoicing, accounting, CRM, ERP, HR, projects, contracts and notifications under one account, with local compliance on each market.
How does an ecosystem cut software costs?
It removes parallel subscriptions and paid connectors: replacing six separate apps typically takes 40–60 % off the monthly bill.
What does Single Sign-On mean for a company?
One person signs in once and reaches every module; when they leave, access is revoked from a single place.
How is tax compliance handled across 70 countries?
Every market has its own e-invoicing format and channel, and the ecosystem applies them from the market you selected.
Partner programme — Singapore
Accountants, corporate secretaries and IT consultants who refer the ecosystem earn a recurring commission for every active client mandate — not a one-off referral fee. The more modules a client uses, the higher the combined commission.
Accounting firms
20–30 %
Recurring commission on every client mandate you refer and retain — every active client on the ecosystem counts.
Corporate secretaries
10–20 %
Earned on referrals arising from ACRA incorporation, UEN setup and CorpPass compliance work you carry out for clients.
IT partners
20–30 %
Tiered upward when you integrate multiple modules — invoicing, ERP, HR and notifications — for a single client project.
