CHOOSE YOUR CALCULATOR
A useful starting point for everyday numbers.
Choose a free New Zealand calculator below. Each tool explains its inputs and assumptions so you can put the result in context.
01 / TAX & PRICING
GST Calculator
Add GST to an amount or work backwards from a GST-inclusive total. See the net amount, tax and total together.
02 / INCOME & TAX
Income Tax Calculator
Explore an income-tax estimate using the rates, period and assumptions shown in the calculator.
03 / SAVINGS & GROWTH
Compound Interest
Explore how a starting balance, contributions, time and an assumed interest rate affect savings growth.
04 / INVESTING & GROWTH
Investment Calculator
See how your money could grow over time with regular contributions and compound returns.
Get more from your result
Check your inputs
Confirm the amounts, time period and options before calculating.
Read the assumptions
Review the calculator’s stated rates and what it includes or excludes.
Keep the context
Use the result as an estimate alongside the relevant guidance.
Calculator results are estimates. For tax, lending or investment decisions, confirm the relevant information with official sources or an appropriately qualified professional.