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15% GST on $100
GST on $100 is $15, making $115 in total. Calculate any amount.
Before GST
$100.00
GST (15%)
$15.00
Total with GST
$115.00
Quick rule: the GST inside a GST-inclusive price is the price × 3 ÷ 23 (about 13.04%).
🧾 Do I need to register for GST?
NZ GST is 15% on most goods and services, including food. Residential rent and financial services are exempt. Rules last checked: October 2026. 🔒
Questions people ask
How do I work out GST in NZ?+
To add GST, multiply by 1.15. To find the GST inside a GST-inclusive price, multiply by 3 and divide by 23.
When must I register for GST?+
When your turnover in the last 12 months, or the next 12 months, is over $60,000.
Is food GST-free in NZ?+
No. Unlike Australia, NZ charges 15% GST on food. Residential rent, financial services and exports are exempt or zero-rated.