Singapore GST Calculator
Add Singapore GST at the current 9% rate to any net price — or remove GST from a GST-inclusive amount. The rate increased from 8% in January 2024. Instant net, GST, and gross breakdown.
Add or remove Singapore GST at 9% — instantly shows net, GST amount, and gross total for invoicing and GST returns.
Formula
Add GST: Gross = Net × 1.09 | Remove GST: Net = Gross ÷ 1.09
Singapore GST uses the same mechanics as VAT. At 9%: multiply the net price by 1.09 to get the GST-inclusive price. To extract the net from a GST-inclusive amount, divide by 1.09. The GST component is the difference between gross and net.
Worked Example
Scenario 1 — B2B invoice:
A Singapore-registered consultancy invoices a local client SGD 8,000 for project management services. GST at 9% applies.
GST = SGD 8,000 × 9% = SGD 720.00
Invoice total = SGD 8,000 + SGD 720 = SGD 8,720.00
Scenario 2 — Extracting GST from a receipt:
A supplier invoice shows SGD 1,635 GST-inclusive. What is the GST portion?
Net = SGD 1,635 ÷ 1.09 = SGD 1,500.00
GST = SGD 1,635 − SGD 1,500 = SGD 135.00
If the client is an overseas business and the services qualify as international services under the GST Act, zero-rating at 0% may apply — confirm with IRAS guidelines before invoicing.
Common Mistakes
- Using the old 8% rate. Singapore raised GST from 8% to 9% on 1 January 2024. Any calculation using 8% will understate GST obligations for invoices issued from that date onwards.
- Assuming all supplies are standard-rated. Exports of goods and international services are zero-rated at 0%. Supplies such as financial services and residential property are exempt. Always confirm the GST treatment before invoicing.
- Overlooking the GST registration threshold. Businesses must register for GST once their taxable turnover exceeds SGD 1 million per year. Charging GST without being registered — or failing to register when required — both carry penalties.
Guide
How to Use
- 1
Choose Add or Remove
Select Add GST to calculate the GST-inclusive price from a net amount, or Remove GST to extract the net from a gross price.
- 2
Enter the amount
Type the price in Singapore dollars (SGD). The percentage calculation works for any value.
- 3
Click Calculate
The result shows the net amount, GST at 9%, and the gross GST-inclusive total.
- 4
Copy the result
Use the copy button to paste the breakdown directly into an invoice, quote, or record.
FAQ
Frequently Asked Questions
Next Steps