Gross profit margin: the formula, margin versus markup, and a calculator

Gross profit margin is how much of every dollar of sales is left after paying for what you sold. It is the first number to check when a busy month somehow leaves less in the bank, and the one most often confused with markup.

Guides · Checked against the ATO on 14 October 2026

The formula

Gross profit is your sales minus your cost of sales. Gross profit margin is that gross profit as a share of sales. Use figures without GST.

A yearAmount
Sales$400,000
Less cost of sales$150,000
Gross profit$250,000
Gross profit margin$250,000 ÷ $400,000 × 100 = 62.5%

So 62.5 cents of every sales dollar is left to pay wages, rent and everything else, before any profit. Gross margin is simply 100% minus your cost of sales percentage.

Margin is not markup

Markup is gross profit as a share of cost; margin is gross profit as a share of the price. The same sale gives two very different numbers: the example above is a 62.5% margin but a 166.7% markup. Price with a markup when you meant a margin and you’ll earn less than you planned.

Gross marginSame thing as a markup of
20%25%
25%33.3%
30%42.9%
40%66.7%
50%100%
60%150%
70%233.3%

Pricing for the margin you want

Divide the cost by one minus the margin you want. An item that costs you $8 needs a price of $8 ÷ (1 − 0.65) = $22.86 before GST to earn a 65% margin, or $25.14 with GST added.

Margin and markup calculator

Enter sales and cost of sales to see your gross profit, margin and markup.

Enter a cost and the margin you want to see the price to charge.

Works out in your browser. Nothing you type is sent anywhere.

What’s a normal gross margin?

It depends entirely on the industry. The ATO publishes cost of sales ranges, and the gross margin is the other side of them: a coffee shop turning over $250,000 to $600,000 has a cost of sales range of 35% to 41%, which is a gross margin of 59% to 65%. Look up your industry on the benchmarks page.

When your margin falls

A falling gross margin usually means costs rose and prices didn’t follow, discounts crept in, more stock was wasted, or you sold more of your lower-margin lines. Check it every month: a few points lost on gross margin can cost more than a big jump in any single expense.

Where Savra comes in

Connect Xero or QuickBooks and Savra reads your profit and loss, puts your margins next to your industry’s ATO ranges, refreshed every 90 days, and answers “why did my margin drop last month?” from your own books.

Try Savra free

Sources

A general guide, not financial or tax advice. Your accountant or BAS agent can tell you what applies to your business.