If your total revenue exceeds S$1 million (whether generated onshore or offshore), your company must apply for a GST Exemption (GST F2 application) with IRAS to defer the need to conduct ongoing GST compliance. In order to keep this exemption, your company will need to constantly monitor your total offshore/ international revenue to ensure that it remains at least 90% of your total revenue allocation.
If your offshore revenue falls below 90% (say, consistently for three months), you must notify IRAS and register for GST as soon as possible. IRAS is also likely to backdate the effective date of GST registration to the date when offshore/ international sales fall below 90%.
If you are eligible, Co A can help you apply for GST Exemption (GST F2 application). We charge S$400.