Fast calculator view for mobile and desktop
New Zealand business tax
GST Calculator NZ
Add or remove GST from a price for New Zealand invoices, checkout totals, and small business pricing decisions.
When to use this GST calculator
Use this when you need a quick GST-inclusive total for a New Zealand quote, invoice, purchase check, or selling price.
What to check next
Confirm whether your starting amount is before GST or already includes GST before using the result on a quote or invoice.
Who should use this New Zealand GST calculator
This calculator is useful for New Zealand sole traders, freelancers, service businesses, and small sellers who want a simple estimate for GST-inclusive pricing and invoice preparation.
Frequently asked questions
Does this tool replace accounting advice?
No. It is meant for fast online estimates and planning. Final tax work should still be checked against your current business records and local rules.
Can I use it for quotes and invoices?
Yes. It is especially useful for checking totals quickly before preparing final documents.
Example calculation
Example: if the base amount is 180 and the GST rate is 15%, the GST amount is 27 and the final total is 207.
Related tools
Related options include the GST Calculator Australia, the GST/HST Calculator, and the VAT Calculator.