Singaporean GST Calculator

Calculate GST with this simple Singaporean GST calculator. It can be used as well as reverse Goods and Services calculator. It is easy to calculate GST inclusive and exclusive prices.


What is GST rate in Singapore?

Current GST rate in Singapore is 8% for goods and services.

Singaporean Goods and Services tax history

In Singapore the goods and services tax (GST) was introduced on April 1, 1994.

How to calculate Singaporean GST manually

  • To calculate Singaporean GST at 8% rate is very easy: just multiple your GST exclusive amount by 0.08.

$300 is GST exclusive value

$300 * 0.08 = $24 GST amount

  • To get GST inclusive amount multiply GST exclusive value by 1.08

$300 is GST exclusive value

$300 * 1.08 = $324 GST inclusive amount

  • To get GST part of GST inclusive amount you need divide GST inclusive amount by 108 and multiply by 8

$216 is GST inclusive value

($216 / 108) * 8 = $16 GST value

  • To get GST exclusive amount while knowing GST inclusive value you need to multiply GST inclusive price by 100 ant then divide result by 108

$216 is GST inclusive value


$21600/ 108 = $200

15 Replies to “Singaporean GST Calculator”

  1. Please advice how much revenue should I declare for GST in the following situation :
    Fees paid by students is $98 thru online.
    Our Nets provider deduct a service charge of $3.43 and GST output of $0.24. Therefore the amount credited to our bank in only $94.33.
    We issue receipt as $98.
    What is the revenue should be recognize for GST? is it $98 or $94.33

  2. Hello there
    I’m having trouble submitting an electronic invoice for Vendors @ Gov.
    A school office ordered an item for $ 1.60 including GST,
    When I create an electronic invoice, the amount excluding 7% GST should be $ 1.495,
    GST becomes $ 0.11, so the total GST is $ 1.61,
    I have changed the Goods and Services Tax (GST) to 0.10 to get a total Goods and Services Tax of $ 1.60,
    However, an error occurred while submitting the electronic invoice.
    A message always appears:
    Goods and services tax excluding GST shall be 7% of the total amount and the difference accepted is +/- 0.25% or $ 0.50, whichever is lower.
    Please help solve this problem, thanks.

    1. Item $ 1.60/- including GST

      (1.60/107)*7 = $ 0.10 is GST value

      $1.60 – $ 0.10 = $ 1.50/- is exclusive GST

  3. I made a purchase of SGD 113 last 2 weeks, and i only get SGD 5 tax refund at the airport, according to the calculator, i should get SGD 8.37
    Is there any deductible amount?

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