Singapore accounting, payroll & tax compliance in one place.
Invoicing, journals, financial statements, bank reconciliation, GST F5 returns, CPF payroll, IR8A/IR21, leave, claims, and e-signing — with InvoiceNow e-invoicing via Peppol built in for the 2026 mandate.
Three modules, one platform
Stop stitching payroll, books, and signing across three separate tools. One login, one source of truth.
Purpose-built for Singapore compliance, not adapted to it
Global platforms bolt Singapore compliance on as an add-on or integration. Critical Mass Cloud was built for it from the ground up — Peppol e-invoicing, CPF and SDL contributions, IRAS AIS submissions, GST F5 returns, and itemised payslips to MOM standards are native, not afterthoughts.
The InvoiceNow mandate is live
IRAS now requires GST-registered businesses to transmit invoices electronically via the Peppol network. InvoiceNow support is built into Critical Mass Cloud — IMDA accreditation is in progress.
1 Apr 2026
New voluntary GST registrants
2026–2028
Voluntary registrants (phased by revenue)
By 2031
All GST-registered businesses
Source: IRAS GST InvoiceNow Requirement. Your business may receive its specific notification before the general phase-in date.
Your data, properly isolated
Critical Mass Cloud is multi-tenant with schema-per-tenant isolation — your business's data is separated at the database level, not just filtered by an ID. Built to PDPA expectations.
Schema-per-tenant database isolation
Who it's for
Singapore SMEs of roughly 5 to 50 staff who want payroll, books, and signing in one place — purpose-built for Singapore rules, not a global platform adapted to them.
Singapore compliance, explained
Practical guides to the deadlines and filings Singapore businesses actually face.
GST InvoiceNow: when is your mandatory date?
IRAS is notifying businesses of their InvoiceNow deadlines through 2026. Find yours.
How to choose an InvoiceNow-Ready Solution
Many solutions are free for SMEs until 2031. How the options differ.
How to submit IR8A and AIS to IRAS
Step-by-step for year-end employee tax filings — deadlines, common mistakes, and how to auto-generate.
Singapore compliance calendar 2026
Every CPF, IRAS, GST, and InvoiceNow deadline for the year, in one place.
One platform for Singapore accounting, payroll, and compliance
See how Critical Mass Cloud handles GST, CPF, InvoiceNow, and everything else Singapore SMEs file — in one place.
Request a demo