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GST calculator for Singapore

Add or remove GST at 9% or any other Singapore rate.

Country

GST rate

Amount without GST (net)

Without GST

$100.00

GST at 9%

$9.00

With GST

$109.00

$100.00 × 9% = $9.00 GST. $100.00 × 1.09 = $109.00.

GST rates in Singapore

Rate	$100.00 net becomes	GST inside $100.00 gross
9% (standard)	$109.00	$8.26

Worked examples at 9%

Adding GST: $250.00 × 1.09 = $272.50 ($22.50 GST).
Removing GST: $250.00 ÷ 1.09 = $229.36 ($20.64 GST).

Invoicing with GST

If you're registered for GST, your invoices need to show the amount without tax, the rate and the GST separately. Our free invoice generator works it out and lays it out for you.

Questions people ask

›What is the GST rate in Singapore?

The standard rate is 9%. Rates checked October 2026.

›How do I add 9% GST?

Multiply the net price by 1.09. For example, $100.00 becomes $109.00, of which $9.00 is GST.

›How do I remove 9% GST from a price?

Divide the gross price by 1.09. For example, $100.00 including GST is $91.74 without it, so the GST is $8.26.