Discount Impact Calculator · free · 1 minute

How many more sales does a discount need?

A 20% discount doesn’t cost 20% of your profit. On a typical margin it costs half of it or more. See how many extra orders your discount has to bring in just to stand still.

What a customer pays for one order before the discount.

Since 22 September 2025 most goods are 5% or 18%; gold and silver jewellery is 3%.

Product, packaging, shipping and payment fees, before GST. What the order costs you whatever price it sells at.

Fill in this or the next one.

A flat amount off the order, including GST.

How it works

  1. Margin per order = price without GST − cost of the order.
  2. The discount comes off the price, so it comes straight off the margin.
  3. Extra sales needed = margin at full price ÷ margin with the discount − 1.
  4. The table shows what happens to profit if sales rise by 10%, 25%, 50% or 100%.

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