On 28 September 2026, IRAS updated its ‘Foreign Currency Transactions’ guide under GST output tax, introducing new sections on approved exchange rate sources, handling of different transaction types, and the treatment of exchange gains and losses for GST purposes. The guidance now explicitly lists the acceptable exchange rate sources: the daily rates published by the Monetary Authority of Singapore (MAS), rates from approved financial news agencies (Reuters, Bloomberg), and the taxpayer’s own bank’s telegraphic transfer rates, provided they are used consistently. It clarifies that for imported services under the reverse charge regime, the exchange rate at the time of payment (not invoice) should be used. The guide also distinguishes between realized and unrealized exchange gains/losses, confirming that only realized gains/losses at the point of payment affect the value of supply for GST. This update is critical for businesses with significant cross-border trade and those under the Overseas Vendor Registration (OVR) regime.
Key Takeaways
- Approved Rate Sources: The endorsement of MAS daily rates and major financial agency rates provides certainty for businesses that previously used internal rates, reducing audit risk.
- Reverse Charge Timing: The clarification that payment-date rates apply for reverse charge supplies aligns GST with the cash-basis nature of the mechanism, simplifying compliance for recipients of imported services.
- Exchange Gain/Loss Treatment: The confirmation that unrealized exchange differences do not alter the GST value of supply prevents artificial inflation or reduction of output tax due to currency volatility.
Disclaimer: This article is compiled and summarized by the AI based on publicly available information and is for general information purposes only. It does not constitute any form of formal tax advice, legal opinion, or basis for performance. Please consult a qualified professional tax advisor or legal counsel for tax advice.
Source: Read Official Announcement