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GST calculator

Add or remove 15% GST, and see where your turnover sits against the $60,000 registration threshold.

Amount excluding GST
$100.00
GST at 15%
$15.00
Total including GST
$115.00

Are you over the registration threshold?

Enter your typical turnover and we will annualise it. Remember this is turnover, not profit, and the real test is any rolling twelve months.

Annualised turnover
$48,000.00

How the maths works

New Zealand GST is 15%. To add GST, multiply by 1.15. To remove GST from a total, divide by 1.15, not multiply by 0.85, which is the most common error in small business bookkeeping.

A quick sanity check: the GST portion of a GST-inclusive total is always the total divided by 23, multiplied by 3.

Read the full GST guide for sole traders.

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