Margin vs Markup: The Pricing Mistake That Quietly Kills Small Businesses
A shop owner decides she wants "50% margins." Her supplier charges $40 per unit, so she adds 50% and prices it at $60. She has just made a mistake that costs her money on every single unit she will ever sell — because $60 on a $40 cost is not a 50% margin. It's a 33% margin.
This confusion is extraordinarily common, and because it's baked into the price list, it compounds silently across thousands of transactions. Here's how to get it right.
The short version
- Margin is profit as a percentage of the selling price.
- Markup is profit as a percentage of the cost.
- To hit a target margin, divide cost by (1 − margin). Never multiply cost by (1 + margin).
- A 50% markup produces only a 33% margin. To get a 50% margin you need a 100% markup.
The two formulas
Both describe the same gap between what you paid and what you charged. They just divide by different things.
Margin = (Price − Cost) ÷ Price × 100
Markup = (Price − Cost) ÷ Cost × 100
Take that $40 item sold for $60. The profit is $20 either way. But:
- Margin: $20 ÷ $60 = 33.3%
- Markup: $20 ÷ $40 = 50%
Same transaction, two very different-looking numbers. Neither is wrong — but if you say one and calculate the other, you lose money.
The conversion table worth printing
| If you apply this markup… | …you actually get this margin |
|---|---|
| 15% | 13.0% |
| 25% | 20.0% |
| 33% | 24.8% |
| 50% | 33.3% |
| 75% | 42.9% |
| 100% | 50.0% |
| 150% | 60.0% |
| 233% | 70.0% |
And the direction that actually matters when you're setting prices:
| To achieve this margin… | …divide your cost by | Example on a $40 cost |
|---|---|---|
| 20% | 0.80 | $50.00 |
| 30% | 0.70 | $57.14 |
| 40% | 0.60 | $66.67 |
| 50% | 0.50 | $80.00 |
| 60% | 0.40 | $100.00 |
| 70% | 0.30 | $133.33 |
Don't do this by hand. Enter your cost and target margin and get the exact price to charge.
Open the margin calculatorWhat belongs in "cost"
Getting the formula right doesn't help if the cost input is wrong — and this is where most small businesses actually lose their margin. Your unit cost should include every expense that scales with the sale:
- The product itself — purchase price or raw materials.
- Inbound shipping and duties — spread across the units in the shipment.
- Payment processing — typically 2.4–2.9% plus $0.30 per transaction. On a $60 sale that's around $2. Ignoring it silently eats three percentage points of margin.
- Packaging and outbound shipping that you don't separately charge for.
- Direct labour — the hours actually spent making or fulfilling this specific unit.
- Expected returns and breakage — if 3% of units come back, your effective cost per sold unit is higher.
Rent, salaries, software subscriptions and insurance do not belong here. Those are fixed overheads, and they're handled by break-even analysis rather than unit pricing.
Worked example: a small print shop
A custom t-shirt sells for $35. The blank costs $8, ink and transfer materials $2.50, and roughly 12 minutes of press time at a $25/hour effective labour cost adds $5. Payment processing on $35 is about $1.32. Packaging is $0.90.
True unit cost: $17.72. Gross margin: ($35 − $17.72) ÷ $35 = 49.4%.
The owner who only counted the $8 blank thought the margin was 77%. That gap — between the imagined margin and the real one — is exactly the space where a business quietly fails to cover its overheads.
What margin should you actually target?
There is no universal right answer, because gross margin has to cover wildly different overhead structures. Rough industry norms:
| Business type | Typical gross margin |
|---|---|
| Grocery / convenience retail | 10–25% |
| General retail / apparel | 40–60% |
| Restaurants (food cost basis) | 60–70% |
| Custom manufacturing / print | 40–55% |
| Professional services | 50–70% |
| Software / digital products | 80–90% |
The useful question isn't "what's a good margin" but "does my gross margin, multiplied by my realistic sales volume, cover my fixed costs with something left over?" That's break-even analysis, and it's the natural next step after pricing.
Why raising prices beats chasing volume
This is the most counterintuitive and most valuable thing in this guide. Consider a business selling 1,000 units at $60 with a $40 cost:
- Revenue $60,000, gross profit $20,000.
Now raise the price 10%, to $66. Suppose you lose 10% of your customers as a result — 900 units:
- Revenue $59,400, gross profit ($66 − $40) × 900 = $23,400.
You sold less, made slightly less revenue, and earned 17% more gross profit — while doing 10% less work, holding less inventory, and serving fewer customers. Because the price increase drops entirely into profit while the cost per unit doesn't move, small price changes have leverage that volume changes don't.
Run the mirror image and it's alarming: cut prices 10% to $54, and even if sales jump 20% to 1,200 units, gross profit is ($54 − $40) × 1,200 = $16,800 — less than where you started, for 20% more work. Discounting has to move enormous volume just to stand still.
Common pricing mistakes
- Pricing off competitors without knowing their costs. A competitor's $50 price might reflect better supplier terms, a different cost base, or a business quietly losing money.
- Forgetting to reprice when costs rise. If your supplier raises prices 8% and you hold your price, that comes straight out of margin. Review pricing at least twice a year.
- Uniform markup across all products. Fast-moving items can carry thinner margins; slow-moving, specialised or hard-to-source items should carry more. Blanket markup leaves money on the table at both ends.
- Discounting without a floor. Before you offer 20% off, check what it does to margin. On a 33% margin, a 20% discount cuts gross profit by roughly 60%.
- Not charging for your own time. Owner-operators routinely price as if their labour is free, then wonder why there's no money to hire.