Singapore GST Calculator 2026 (9%)

The Singapore GST Calculator is a free, browser-based tool that adds or removes Goods and Services Tax at the current 9% rate. Enter a net figure to get the GST-inclusive price, or a gross figure to extract the GST correctly by dividing by 1.09 — the step most manual calculations get wrong. Updated 30 August 2026.

Singapore GST in 2026

Singapore's Goods and Services Tax (GST) is a broad-based consumption tax applied on the supply of goods and services in Singapore and on goods imported into Singapore. The rate increased from 8% to 9% on 1 January 2024, completing the staged increase announced in Budget 2022. As of 2026, the rate remains 9% (source: iras.gov.sg GST).

GST is administered by the Inland Revenue Authority of Singapore (IRAS). It is similar to VAT in many jurisdictions but with key Singapore-specific features: zero-rated international services, exempt residential property and financial services, and a relatively narrow exemption list compared to many countries.

Who Must Register for GST

Compulsory registration applies if your taxable turnover exceeds S$1 million in the past 12 months OR is reasonably expected to exceed S$1 million in the next 12 months. Voluntary registration is allowed for businesses below the threshold who want to claim input GST. Late registration triggers retrospective backdating to when you should have registered, plus penalties (source: iras.gov.sg registration).

Once registered, GST-registered businesses must charge 9% GST on standard-rated supplies, file GST F5 returns quarterly (or monthly for high-volume businesses), and remit net GST (output GST minus claimable input GST) to IRAS by the due date.

How to Add or Remove GST

To add 9% GST to a net amount: multiply by 1.09 (e.g., S$100 net + 9% GST = S$109 gross). To remove GST from a gross amount: divide by 1.09 (e.g., S$109 gross ÷ 1.09 = S$100 net; GST amount = S$109 − S$100 = S$9). The GST-extraction formula avoids the common error of taking 9% of the gross (which would understate the GST and overstate the net).

Zero-Rated vs Exempt: Why 0% and No GST Are Not the Same Thing

This is the distinction that costs Singapore businesses real money, because both look like "no GST charged" on an invoice while doing opposite things to your input tax claim.

• Zero-rated (0%) supplies are still taxable supplies. You charge 0% GST, and you can still claim back the input GST on the costs of making them. Exports of goods and qualifying international services under Section 21(3) sit here.
• Exempt supplies are outside the GST net. You charge nothing, and you generally cannot claim the input GST attributable to them, so the GST you paid on related costs becomes a real cost to your business. The main categories are most financial services, the sale and lease of residential property, the supply of digital payment tokens, and investment precious metals.

Two practical consequences. A company whose output is mostly exports is usually in a net refund position and benefits from registering even below the threshold. A company whose output is mostly exempt gets no such benefit, and voluntary registration can leave it worse off. Zero-rated supplies also count toward the S$1 million registration threshold; exempt supplies generally do not. Confirm your own mix against IRAS — how GST works before deciding whether to register voluntarily.

Filing GST F5 Returns and the Move to InvoiceNow

Registration is the start, not the end. GST-registered businesses file a GST F5 return for each accounting period — quarterly by default, with monthly filing available and sometimes required for high-volume businesses — and both the return and the payment are due one month after the end of the period. A nil return still has to be filed. Because the amount you remit is output GST minus claimable input GST, keeping supplier tax invoices is what turns input GST from a cost back into a credit.

IRAS is also phasing in InvoiceNow, the national Peppol-based e-invoicing network, as the channel through which GST-registered businesses transmit invoice data. The phase-in started with newly incorporated companies registering voluntarily and extends to further groups of new voluntary registrants through 2026, ahead of wider adoption. If you are about to register voluntarily, check the current phase-in dates on IRAS — do I need to register for GST before choosing your registration date, since registering a month earlier or later can change which requirements apply to you.

Reverse Charge and Overseas Vendor Registration (OVR)

Since 1 January 2023, Singapore extended its GST regime to cover imported services and remote services from overseas suppliers, requiring overseas vendors with global turnover over S$1M and Singapore B2C sales over S$100K to register for GST under the Overseas Vendor Registration (OVR) regime. From 2025, low-value goods (under S$400) imported by air/post are also GST-taxable under OVR rules. Singapore consumers may notice GST showing on Amazon US, eBay, and Shein invoices for the first time.

For broader Singapore tax planning, see our CPF retirement calculator and SRS tax relief calculator. For corporate tax matters, the Singapore corporate tax calculator handles Form C-S and C-S (Lite) returns.

Last updated 30 August 2026. Sources: iras.gov.sg GST, Ministry of Finance Singapore.