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Taxes · IRAS

When to report supplies in GST returns

For most supplies, output tax belongs in the period containing the earlier invoice or receipt of payment.

Source checked · 11 October 2026

Key requirements

A bill or debit note requesting payment can be an invoice for this rule; a normal pro-forma invoice or sales order generally is not. Payment dates depend on the method: bank receipt for transfers, banking-in for cheques and the intermediary’s transfer date for specified payment facilities. Continuous services use the same earlier-event approach for periodic billing and payment. Approval or sale-or-return goods have an additional twelve-month limit from removal, subject to the stated rules. A refundable security deposit is not automatically consideration. Preserve invoice issue and actual payment dates rather than using delivery or the book-entry date alone.

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.

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