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SmartCalcWorks

Business Calculators

Quick, transparent calculators for the numbers small businesses, sole traders and freelancers work with every day — tax on prices, profit, margin and markup.

  • Business

    New Zealand GST Calculator

    Add 15% GST to a price or extract GST from a GST-inclusive amount, with an adjustable rate.

  • Business

    Profit Margin Calculator

    Find gross profit, margin and markup from cost and selling price, or the price needed to hit a target margin.

Pricing with confidence

Good pricing starts with knowing three numbers: what an item costs you, what tax you must collect, and the margin you need to cover overheads and pay yourself.

  1. Total your direct cost per unit, including payment fees (see the payment fee calculators).
  2. Use the profit margin calculator to find the GST-exclusive price for your target margin.
  3. If you’re GST-registered, add GST with the GST calculator to get the price customers see.

These tools do the arithmetic only. For tax obligations, check Inland Revenue guidance or speak to an accountant.