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9% GST — Free tool

Free Singapore GST Calculator

Calculate Singapore GST at the current 9% rate — add or remove GST from any Singapore dollar amount.

GST / Tax Rate

Enter a price above to see the calculation

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Rate: 9% Currency: SGD (S$)

How Singapore GST works

Singapore's Goods and Services Tax is 9%. GST-registered businesses charge GST on taxable supplies and file returns with IRAS. Add GST: Gross = Net × 1.09. Example: S$100 → S$9 GST → S$109. Remove: Net = Gross ÷ 1.09. Verify your figures here, then generate a professional SGD invoice with InvoBuzz.

Reverse charge & inclusive prices

Customer accounting (reverse charge) applies to certain imported services and business-to-business digital services under Singapore GST rules.

Invoice requirements

A Singapore tax invoice generally requires: supplier name and GST registration number, invoice number/date, customer name, description, and GST amount.

Create a Singapore invoice with GST

Pre-fill SGD and 9% GST in our free invoice generator.

Singapore GST FAQ

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