Finance calculator

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Singapore GST Calculator

Add or remove Singapore GST using standard, zero, or custom rates with clear net, GST, and gross price results.

FormulaGST = net price x rate; gross price = net price + GST; net price = gross price / (1 + rate)

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.

SourcesThis 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.

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.
FAQ6 common questions for this calculator.

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 the Singapore GST calculator remove GST from an inclusive price?+

Yes. In the Singapore GST calculator, use GST-inclusive mode to separate the gross price into pre-GST value and GST collected.

How does the Singapore GST Calculator calculate the result?+

For the Singapore GST Calculator, 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?+

For the Singapore GST Calculator, enter standard, zero, or custom rates. Keep the units consistent with the calculator fields and compare your setup with the worked example on the page.

How accurate is the Singapore GST Calculator?+

Singapore GST Calculator is accurate for the rates, amounts, dates, and rules entered. It uses the Singapore GST add/remove formulas shown on this page. Real products can differ because of fees, taxes, contract terms, or changing official thresholds.

What should I check before using the Singapore GST Calculator result?+

For the Singapore GST Calculator, check standard, zero, or custom rates, then compare the Singapore GST add/remove formulas and worked example with the contract or source you will rely on. Fees, tax year, currency, and payment timing can change the final decision.

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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. 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. 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. 3

    Compare scenarios

    Change one or more inputs to see how they affect the singapore GST Calculator result before you use the estimate.