Singapore GST Calculator

Add or remove GST at Singapore’s 9% standard rate — net, GST and gross, instantly. Free, no signup.

GST rate
Net
$1,000.00
GST @ 9%
$90.00
Gross
$1,090.00

GST in Singapore: the essentials

  • Standard rate: 9%
  • Registration: S$1 million taxable turnover
  • Return: GST F5, filed quarterly with IRAS
  • E-invoicing: InvoiceNow (Peppol) network, being adopted GST-wide
  • Corporate tax: 17%

How to calculate GST in Singapore

  1. Enter the amount. Type the amount — your net figure to add GST, or a tax-inclusive figure to remove it.
  2. Choose add or remove GST. Switch between adding GST to a net price and backing it out of a gross price.
  3. Pick the rate. Select the GST rate (default 9%).
  4. Read the result. See the net, GST amount and gross total update instantly.

Stop calculating GST by hand

KARR applies Singapore’s GST automatically on every invoice, tracks the registration threshold, and prepares the return — flagging non-compliance before you file.

Try KARR Free

Frequently asked questions

What is the GST rate in Singapore?

The standard GST rate in Singapore is 9%.

How do I calculate GST in Singapore?

To add GST, multiply the net amount by the rate. At 9%, a 1000 net becomes 1090.00 gross. To remove GST from a tax-inclusive price, divide it by 1.090. This calculator does both instantly.

When must I register for GST in Singapore?

Registration: S$1 million taxable turnover, filed with IRAS.

Is this Singapore GST calculator free?

Yes — it is completely free, needs no signup, and runs entirely in your browser. For automatic GST on every invoice and one-click returns, try KARR.

Read the full Singapore GST & tax guides →

More Asia-Pacific calculators

Australia GSTNew Zealand GSTMalaysia SSTPhilippines VATIndonesia VATThailand VAT

Embed this calculator — free

Add it to your site. Paste this HTML wherever you want it to appear.

<iframe src="https://karr.pro/knowledge/tools/gst-calculator-singapore/embed" title="Singapore GST Calculator" width="100%" height="520" style="border:1px solid #e7e5e4;border-radius:12px" loading="lazy"></iframe>

Get the KARR compliance brief

Plain-language tax, GST/VAT and accounting updates for your market — occasional, no spam.

Rates shown reflect Singapore’s published GST rates and are provided for guidance only — confirm the rate for your specific supply. Not tax advice.