Margin and markup both describe the gap between what something costs you and what you sell it for. They are calculated from the same two numbers. The difference is what you divide by — and that single choice is why so many small businesses discover, months into trading, that their prices never covered what they thought they did.
The only difference is the denominator
Markup measures profit against cost. Margin measures profit against the selling price. Take an item that costs you $100 and sells for $150. The profit is $50 either way.
- Markup = profit ÷ cost = 50 ÷ 100 = 50%
- Margin = profit ÷ revenue = 50 ÷ 150 = 33.3%
Same transaction, two numbers that differ by seventeen percentage points. Markup is always the larger of the two, because cost is always smaller than the selling price. Any time someone quotes you a percentage without saying which one they mean, that ambiguity is worth money.
Try it freeProfit Margin CalculatorTurn revenue and cost into gross margin percentage.Where it goes wrong in practice
The classic error runs like this. You decide you need a 30% margin to keep the lights on. You take your $100 cost, add 30%, and price at $130. But $30 of profit on $130 of revenue is a 23% margin, not 30%. You have quietly given away almost a quarter of the profit you were aiming for, on every unit, forever.
To actually hit a 30% margin on a $100 cost, you divide rather than multiply: 100 ÷ (1 − 0.30) = $142.86. The required markup is 42.9%, not 30%.
The rule worth memorising: to convert a target margin into a price, divide the cost by (1 − margin). Adding the margin percentage to the cost always undercharges.
Why anyone uses markup at all
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Markup is not wrong — it is just answering a different question. It is the more natural tool when you are standing in front of inventory deciding what to put on a price tag, because cost is the number you know. Retail and wholesale both run on markup conventions for exactly this reason, and “keystone” pricing — a 100% markup, or double the cost — is a long-standing shorthand.
Margin is the more useful tool the moment you are looking at a profit and loss statement, because every line on that statement is a percentage of revenue. Your gross margin is directly comparable to your competitors, your rent as a share of sales, and your break-even point. Markup is not comparable to any of those.
Most businesses that price well use both: markup at the point of setting a price, margin when reviewing whether the business is working.
The conversions, both directions
- Margin from markup: markup ÷ (1 + markup). A 50% markup is a 33.3% margin.
- Markup from margin: margin ÷ (1 − margin). A 50% margin needs a 100% markup.
- A 25% margin needs a 33% markup. A 40% margin needs a 67% markup. A 50% margin needs a 100% markup.
That last line is the one worth internalising. Doubling the cost to get the price is what a 50% margin actually requires. It feels aggressive until you remember that gross margin still has to pay for rent, wages, software, marketing and tax before any of it is yours.
Try it freeMarkup CalculatorSet a selling price from cost and target markup.One more trap: discounting eats margin, not markup
A 10% discount does not cost you 10% of your profit. On a product with a 30% margin, a 10% price cut removes a third of your gross profit, because the discount comes entirely out of the margin — the cost does not move. The lower your margin, the more violent this effect. At a 15% margin, a 10% discount wipes out two thirds of your profit on that sale.
This is why blanket discounting is so dangerous for low-margin businesses, and why the honest question before any sale is not “can we afford 10% off” but “how many more units do we need to sell to end up where we started”.
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Frequently asked questions
- Is margin or markup better for pricing?
- Use markup to set the price, because cost is the number you have in front of you. Use margin to check whether the business is working, because margin is comparable to every other line on your profit and loss statement.
- What is a 50% markup as a margin?
- A 50% markup is a 33.3% margin. Divide the markup by one plus the markup: 0.50 ÷ 1.50 = 0.333.
- How do I price for a 40% margin?
- Divide your cost by 0.60. A $100 cost becomes $166.67, which is a 67% markup.
- Does margin include overheads?
- Gross margin covers only direct costs — materials, and labour tied to the unit. Rent, software, salaries and marketing come out of gross profit afterwards, which is why a healthy gross margin can still produce a loss.
General information only — not tax, legal, accounting or financial advice. Rates change and individual circumstances vary. Confirm figures with the CRA, the IRS, your state or provincial authority, or a licensed professional before acting on them.
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