GST Calculator

How do I calcuate GST Inclusive or GST Exclusive prices?

The Cashbook GST Calculator  is a simple way to calculate GST inclusive or GST exclusive prices.

• Click on the GST > Calculator menu option.

• There are four variables in the calculator:
  1. Price Excluding GST.
  2. GST Rate % - defaults from GST Setup.
  3. Amount of GST.
  4. Price including GST.

• Enter the value for a variable eg. Price including GST 121.00.
• Press on the Enter key to calculate other variables.

• Click on the Clear button to reset.

For example:

How to calculate GST manually, assuming a GST rate of 10%:

To calculate GST at 10% rate: just multiple your GST exclusive amount by 0.1.

$500 is GST exlusive value

$500 * 0.1 = $50 GST amount

To get GST inclusive amount multiply GST exclusive value by 1.1

$500 is GST exlusive value

$500 * 1.1 = $550 GST inclusive amount

To get GST part of GST inclusive amount you need divide GST inclusive amount by 11

$220 is GST inclusive value

$220 / 11 = $20 GST value

To get GST exclusive amount while knowing GST inclusive value you need to multiply GST inclusive price by 10 ant then divide result by 11

$220 is GST inclusive value

$220 * 10 = $2200

$2200 / 11 = $200 GST exclusive amount