Free tool

Singapore GST calculator

Add or remove GST from any amount, in SGD. Instant, free, and no signup required.

GST 9%
Net (before GST)SGD 0.00
GST (9%)SGD 0.00
Total (incl. GST)SGD 0.00

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Tallium adds GST automatically on every sale and builds your IRAS return summary as you trade.

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GST in Singapore, in plain English

Singapore charges 9% GST filed as the GST F5 with IRAS, with InvoiceNow e-invoicing.

Registration threshold: S$1,000,000 taxable turnover (past or expected next 12 months). Returns are filed as the GST F5 return, and Singapore uses InvoiceNow (Peppol-based, with IRAS). This tool is for quick estimates — always confirm the exact rate and treatment of your supplies with Inland Revenue Authority of Singapore (IRAS) or a qualified local tax professional.

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