Who can voluntarily register
The first edition dated 30 January 2026 applies to businesses not already compulsorily liable. Qualify through taxable supplies; only out-of-scope supplies such as goods never entering Singapore or transit goods; exempt financial services that are also international services; or imported services/LVG where full input credit would not be available if registered. A business not yet transacting can apply with evidence it is operating and has firm intentions to undertake these activities. Without firm intentions or plans, do not apply.
Before applying: education and three exemptions
A director, sole proprietor, partner, trustee or GST-return preparer must complete Overview of GST e-learning and its quiz before submission. Exemptions are an owner/director/partner/trustee experienced in managing another existing registered business; an Accredited Tax Advisor or Practitioner preparing the returns; or an applicant for OVR simplified pay-only. Training explains registered obligations rather than guaranteeing approval.
GIRO, guarantee and the post-registration conditions
Before ordinary voluntary registration apply for GIRO for payments/refunds and provide a guarantee if required. After registration remain registered at least two years, maintain GIRO, commence taxable supplies within two years or an approved longer period where none existed at application, comply fully with GST Act responsibilities, meet applicable phased InvoiceNow requirements as revised, and comply with any additional IRAS conditions. Paragraphs 3.1–3.3 are expressly given legal force.
OVR pay-only conditions and cancellation
For voluntary OVR simplified pay-only, a case-by-case guarantee may be required before registration. Afterwards maintain registration for at least two years, comply with the Act’s registered-business responsibilities and further imposed conditions. The source sets this separate route rather than simply copying every ordinary GIRO/InvoiceNow condition to it. Failure to meet the applicable pre/post conditions can lead to cancellation by the Comptroller. Enquiries go to IRAS GST Division via Contact Us.
Official source
This article independently explains the substantive contents of the official PDF, including the relevant conditions, procedures and annexes. The linked document remains the authoritative source for its original wording, and later changes should be checked separately.
Read the official PDF ↗