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Taxes · IRAS

Object to Audit Assessment

GST decisions can be reviewed through a reasoned written objection within the applicable deadline.

Source checked · 11 October 2026

Key requirements

The listed matters include registration, assessments, security, refunds and allowable input tax. An assessment objection is generally within thirty days of the notice and must be signed, dated and give detailed reasons. If the Comptroller’s decision remains disputed, lodge a written notice with the GST Board of Review within thirty days, then a grounds petition within a further thirty days. The taxpayer bears the burden of showing the decision is wrong. Assemble contracts, calculation and documentary evidence early. Do not apply the corporate income-tax objection timetable to GST or assume an informal phone discussion preserves a formal appeal deadline.

Official source

A concise, independent Apex Gateway guide based on the official English source, not a reproduction of the complete document. Consult the original for full conditions, exceptions and subsequent updates.

Read the official source ↗
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