Finance calculator
Singapore - 2026Singapore GST Calculator
Add or remove Singapore GST using standard, zero, or custom rates with clear net, GST, and gross price results.
Formula
Singapore GST add/remove formulas
This calculator applies the GST rate you select and does not determine zero-rated, exempt, imported service, reverse charge, or filing treatment.
GST = net price x rate; gross price = net price + GST; net price = gross price / (1 + rate)
At 9% GST, 1,000 before GST has 90 GST and a gross price of 1,090.
Sources and assumptions
Singapore GST source notes
This profile covers a simplified Singapore GST add/remove calculation. The default standard-rate scenario uses the current 9% GST rate from 1 January 2024, with zero and custom options for user-verified situations.
- Effective year
- 2026
- Last verified
- 2026-05-29
This calculator applies the GST rate you select and does not determine zero-rated, exempt, imported service, reverse charge, or filing treatment.
Official and reference sources
Assumptions
- The user selects the GST rate that applies to the supply.
- Exclusive mode treats the entered amount as before GST.
- Inclusive mode treats the entered amount as already including GST.
- The whole amount is treated as taxable at one selected rate.
Not included
- Zero-rated exports, exempt supplies, imported services, reverse charge, overseas vendor registration, and customer accounting rules.
- Input tax claims, registration thresholds, GST returns, invoices, penalties, and transitional rules.
- Customs duties, excise duties, and non-GST charges.
FAQs
What Singapore GST rate does this use by default?+
It defaults to 9%, the standard GST rate used from 1 January 2024, and also offers zero and custom-rate options.
Can it remove GST from an inclusive price?+
Yes. Select GST-inclusive mode to split the total into price before GST and GST amount.
How does the Singapore GST Calculator calculate the result?+
It uses the Singapore GST add/remove formulas: GST = net price x rate; gross price = net price + GST; net price = gross price / (1 + rate). At 9% GST, 1,000 before GST has 90 GST and a gross price of 1,090.
What information do I need to use the Singapore GST Calculator?+
Add or remove Singapore GST using standard, zero, or custom rates with clear net, GST, and gross price results.
How accurate is the Singapore GST Calculator?+
Singapore GST Calculator applies the formula and assumptions shown on this page. Results may be rounded for readability, so verify changing rates, thresholds, medical guidance, or legal rules with the cited source or a qualified professional.
What should I check before using the Singapore GST Calculator result?+
Check that the units, dates, rates, and assumptions match your situation. Change one input at a time to understand which values have the largest effect on the result.
Finance guide
How to use the Singapore GST Calculator
Add or remove Singapore GST using standard, zero, or custom rates with clear net, GST, and gross price results. The page also explains the singapore GST add/remove formulas and shows a practical example: At 9% GST, 1,000 before GST has 90 GST and a gross price of 1,090.
- 1
Enter your details
Enter standard, zero, or custom rates with clear net, GST, and gross price results, then complete any other fields shown in the calculator.
- 2
Check the calculation
Review the result alongside the singapore GST add/remove formulas: GST = net price x rate; gross price = net price + GST; net price = gross price / (1 + rate).
- 3
Compare scenarios
Change one or more inputs to see how they affect the singapore GST Calculator result before you use the estimate.
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