What is Singapore GST?

Goods and Services Tax (GST) is a broad-based consumption tax levied on the import of goods and most supplies of goods and services in Singapore. Administered by the Inland Revenue Authority of Singapore (IRAS), GST is similar to the Value Added Tax (VAT) used in many other countries. Businesses with an annual taxable turnover exceeding S$1 million must register for GST and charge it on their sales.

Effective 1 January 2024, Singapore's GST rate increased to 9%, completing a two-step hike announced in Budget 2022. The government also introduced an enhanced Assurance Package to help Singaporeans offset the impact of the increase. Understanding how to calculate GST — both adding it to a price and extracting it from a GST-inclusive amount — is essential for business owners, consumers, and anyone filing expense claims.

How to Use the GST Calculator

1. Enter the Amount in Singapore dollars (S$).
2. Choose Add GST if your amount is before GST and you want the GST-inclusive price.
3. Choose Remove GST if your amount already includes GST and you want to extract the GST portion and the pre-GST price.
4. Use the Quick Preset buttons (S$10 – S$1,000) for common amounts.
5. Results update live — no need to press a button.

Add GST formula: GST Amount = Amount × 9%, Total = Amount + GST Amount

Remove GST formula: Pre-GST = Inclusive Amount ÷ 1.09, GST = Inclusive Amount − Pre-GST

Why Use Our GST Calculator?

• Always Current — Pre-loaded with the 2024 rate of 9%.
• Dual Mode — Instantly switch between adding and removing GST.
• Quick Presets — One-click amounts for the most common calculations.
• 100% Free & Private — No login required; all calculations happen in your browser.
• Rate History — Reference panel shows all historical GST rates at a glance.

Frequently Asked Questions