Markup vs. Margin: Why They Are Not the Same Thing

Both describe the profit on a sale, and they are constantly confused. Mixing them up can quietly cost a business real money.

Plantrino Guides · Updated 2026 · About a 9-minute read

If you sell anything — a product, a meal, a service — you set prices using one of two ideas: markup or margin. They sound interchangeable, and many people use them as if they are. They are not. They measure the same profit against different baselines, and confusing them leads to underpricing. This guide makes the difference clear, then walks through the arithmetic on a realistic Australian small-business example.

The One Thing That Separates Them

Both markup and margin look at the same gap — the difference between what an item costs you and what you sell it for. That gap is your gross profit. The difference is simply what you divide that profit by:

• Markup measures profit as a percentage of the cost.
• Margin measures profit as a percentage of the selling price.

Same profit in dollars, different denominator, different percentage. That is the entire concept.

The Two Formulas

Because the selling price is always larger than the cost, dividing by the price gives a smaller number. So for the same item, the margin percentage is always lower than the markup percentage. They are never equal — and that is exactly where the costly confusion begins.

A Quick Worked Example

Suppose an item costs you $60 and you sell it for $100. Your gross profit is $40. Now look at that $40 two ways:

• Markup: $40 ÷ $60 × 100 = 66.7% — the profit is two-thirds of the cost.
• Margin: $40 ÷ $100 × 100 = 40% — the profit is 40% of the sale price.

Identical sale, identical $40 of profit — but one figure is 66.7% and the other is 40%. Neither is wrong. They are simply answering different questions.

Putting Real Numbers on It

Numbers like $60 and $100 are tidy, so here is something closer to a real shop. Imagine a small lunch outlet selling a signature bowl. The ingredients, packaging and lid come to $4.20 per bowl, and it sells for $12.00. Gross profit is $12.00 − $4.20 = $7.80.

Two very different-looking percentages describing one $7.80 coin in the till. If the owner tells their accountant "we run about 65% on that item" and the accountant hears margin, everyone is fine. If a supplier rep says "most people mark that up 65%", they are describing a completely different price. These figures are purely for illustration — every business has its own costs — but the gap between the two percentages is real and it is always this large.

Why Mixing Them Up Costs Money

Here is the trap, using the same bowl. The owner decides they want 65% profit and, thinking in markup, adds 65% to the $4.20 cost: $4.20 × 1.65 = $6.93. It feels generous. But check what margin that price actually delivers: profit is $6.93 − $4.20 = $2.73, and $2.73 ÷ $6.93 = 39.4%, not 65%.

The correct price for a 65% margin is $12.00. By treating a margin target as a markup, the bowl has been underpriced by $5.07 — on every single unit. At 40 bowls a day, six days a week, that is 240 units, or about $1,217 of gross profit a week that never existed. Nobody notices, because the shop still looks busy and the till still rings. The money is simply never made.

Working Backwards From a Margin Target

The fix is a single formula. If you know your cost and the margin you want, do not add anything to the cost — divide it:

Back to the bowl: $4.20 ÷ (1 − 0.65) = $4.20 ÷ 0.35 = $12.00. Same answer as before, in one step. A few more from the same $4.20 cost, so you can see how sharply the price moves:

• 50% margin: $4.20 ÷ 0.50 = $8.40
• 60% margin: $4.20 ÷ 0.40 = $10.50
• 70% margin: $4.20 ÷ 0.30 = $14.00

Notice the last five percentage points of margin cost the customer $3.50 — the closer you push margin toward 100%, the more violently price rises. That is worth knowing before you promise yourself a margin your market will not pay for. If the percentage arithmetic itself feels slippery, our guide to calculating percentages covers the mechanics.

Converting Between the Two

Because businesses often think in markup but report in margin, it helps to be able to switch. The relationship is fixed, so you can convert either way:

Check it against the bowl: a 185.7% markup converts to 185.7 ÷ 285.7 × 100 = 65.0% margin. And going the other way, 65 ÷ 35 × 100 = 185.7% markup. The table below shows common pairings:

Notice that a 100% markup — doubling the cost — is only a 50% margin. This catches people out constantly.

GST Sits On Top — Keep It Out of Your Margin

This is the step that trips up Australian businesses specifically. GST is 10%, and if you are registered for GST the tax you collect on a sale is not yours — you are holding it for the ATO. So the price you run your margin maths on should be the GST-exclusive price, not the sticker price.

Say the bowl is displayed at $13.20 including GST. Strip the GST out first: $13.20 ÷ 1.1 = $12.00 ex-GST, with $1.20 of GST. Run the margin on $12.00 and you get the 65% we calculated. Run it on $13.20 by mistake and you get ($13.20 − $4.20) ÷ $13.20 = 68.2% — over three percentage points of margin that exists only on paper.

The same logic applies to your costs. If you are registered for GST, you can generally claim credits for the GST in what you buy, so the $4.20 should also be a GST-exclusive figure — otherwise you are double-counting the tax on both sides of the sum. Registration requirements, credits and what you can claim depend on your circumstances, so check current ATO guidance or ask your tax agent rather than assuming. Our GST guide walks through the add-and-remove arithmetic in more detail.

A Healthy Margin Is Not the Same as a Profit

Markup and margin only describe the gap between what an item cost and what it sold for. Everything else in the business comes out of that gap. Here is a rough weekly picture for our lunch outlet, again purely for illustration:

• Sales (ex-GST): $12,000
• Cost of goods at 35% of sales: $4,200 → gross profit $7,800 (65% margin)
• Rent: $1,500 · Wages: $4,200 · Power, insurance, cleaning: $400 · Other: $300 = $6,400
• Left over: $1,400 — before tax and before paying the owner properly

A 65% gross margin sounds excellent. What actually reaches the owner is around 12% of sales, and one bad week of rain or a wage increase can erase it. This is why gross margin is a pricing tool, not a scoreboard — to see the point where the whole operation covers itself, work through our break-even guide.

Common Mistakes

• Treating a margin target as a markup. The single most expensive error, and the one shown above. If someone says "we want 60%", ask "of cost or of price?" before you touch a price tag.
• Doing the maths on GST-inclusive prices. It inflates your margin on paper and hides a shortfall until BAS time. Strip GST out of both the price and the cost first.
• Comparing your markup to someone else's margin. Industry chatter mixes the two freely. A supplier quoting "a 100% markup" and a competitor quoting "a 50% margin" are describing the identical price.
• Ignoring waste and shrinkage. If you buy 100 portions and sell 92, the real cost per sold item is $4.20 × 100 ÷ 92 ≈ $4.57, which quietly drops a 65% margin to about 62%. Cost per item bought is not cost per item sold.
• Assuming a good gross margin means a profitable business. Rent, wages and overheads all come out of that margin, as the weekly example shows.
• Discounting without redoing the sums. Take 10% off the $12.00 bowl and you lose $1.20 — but that $1.20 comes straight out of $7.80 of gross profit, cutting it to $6.60. You now need to sell about 18% more bowls just to end the day where you started.

Practical Tips

• Pick one language and label it. Decide whether a target is a markup or a margin, and write it down clearly on your pricing sheet.
• Set goals in margin, price with the division formula. Margin reflects true profitability, and Cost ÷ (1 − margin) gets you there in one step.
• Review costs at least quarterly. Supplier prices drift upward in small increments, and a margin set two years ago is rarely the margin you are running today.
• Check your conversions. When translating a margin goal into a price, use the margin formula, not the markup one.

Frequently Asked Questions

Markup and margin are two views of the same profit, measured against two different baselines. Keep them clearly separated, strip GST out before you calculate, set your targets in margin, and always price with the division formula rather than adding a percentage to cost. That small discipline protects your prices — and your profit — from a very common and very expensive mistake.