GUIDES
Singapore payroll and tax guides for business owners
Short, dated guides to the rules Singapore employers deal with: CPF, SDL, GST F5, IR8A and InvoiceNow. Each answers the question first, then gives the detail and its IRAS, CPF Board, MOM or IMDA sources, with the date we checked.
Where a guide mentions MassAdmin, it says what the app does and what it doesn't. If a free or official option is the better answer, the guide says so.
InvoiceNow
When the GST InvoiceNow Requirement applies to you, and what it asks for.
GST InvoiceNow: when is your date?
Six dates from 1 November 2025 to 1 April 2031, set by registration type and annual supplies.
Updated 10 Oct 2026 · Source: IRAS
InvoiceNow and GST in Singapore
What the requirement asks for: invoice data submitted to IRAS through an InvoiceNow-Ready Solution, covering sales and purchases.
Updated 10 Oct 2026 · Source: IRAS
How to choose an InvoiceNow-Ready Solution
What IMDA accreditation means, the free packages IRAS lists for small businesses, and what to check before you commit.
Updated 10 Oct 2026 · Source: IMDA, IRAS
How to get a Peppol ID
What a Peppol ID is, and how you get one through an accredited Access Point.
Updated 10 Oct 2026 · Source: IMDA
InvoiceNow for new companies
Registering for GST voluntarily from 1 April 2026? InvoiceNow is a condition of registration.
Updated 10 Oct 2026 · Source: IRAS
InvoiceNow transition grant
The S$1,000 IMDA grant: who qualifies, how claims work, and what is excluded.
Updated 10 Oct 2026 · Source: IMDA
Payroll and CPF
The monthly figures: CPF, SDL and what goes into a pay run.
CPF contribution rates
The 2026 rates by age, the S$8,000 Ordinary Wage ceiling, and the changes from 1 January 2027.
Updated 10 Oct 2026 · Source: CPF Board
How CPF is calculated
How age band, residency status and the Ordinary Wage ceiling set each employee's CPF.
Updated 10 Oct 2026 · Source: CPF Board
Skills Development Levy (SDL)
0.25% of monthly wages, minimum S$2, maximum S$11.25, collected with CPF.
Updated 10 Oct 2026 · Source: CPF Board
What Singapore payroll software has to handle
CPF, SDL, payslips and IR8A: a checklist for choosing payroll software.
Updated 10 Oct 2026 · Source: CPF Board, IRAS, MOM
GST
Quarterly returns and what goes in each box.
Year end
Employee income reporting to IRAS.