Markup vs margin — the difference that trips up every new owner
Markup and margin are often used interchangeably, but they are different math. Markup is the percentage added to cost to arrive at selling price. Margin is the percentage of selling price that is profit. A 50% markup is not a 50% margin — it is a 33% margin. Getting this wrong is one of the most common pricing errors in small business.
The formula for markup is (Price − Cost) / Cost. The formula for margin is (Price − Cost) / Price. Both describe the same dollar profit, but the denominator changes. If a shirt costs you $20 and you sell it for $30, the markup is 50% ($10 / $20) and the margin is 33.3% ($10 / $30). If your supplier tells you to "mark it up 40%" and you assumed that meant a 40% margin, you will undercharge on every sale.
How to convert between markup and margin
The conversions are straightforward once you have them written down. Keep these close if you do not want to memorize them.
- Margin → Markup:
Markup = Margin / (1 − Margin). A 40% margin is a 66.7% markup. - Markup → Margin:
Margin = Markup / (1 + Markup). A 100% markup is a 50% margin. - Markup 25% → Margin 20%.
- Markup 50% → Margin 33.3%.
- Markup 100% → Margin 50%.
- Markup 200% → Margin 66.7%.
The calculator above does the math live. You enter cost and markup; it gives you price, profit dollars, and the equivalent margin percentage in one view.
Which number should you price on?
Retailers and wholesalers typically think in markup terms because they start from cost and add a fixed percentage. Restaurants often use 3× or 4× food cost, which is a 200–300% markup. Service businesses and SaaS companies think in margin terms because they care about what percent of revenue is profit. Both are valid — what matters is picking one language, training your team on it, and sticking with it in every pricing decision.
If you price on markup but report on margin, you will create chaos in discounting decisions. When a customer asks for 20% off, is that off margin or off markup? A team that does not share a definition will quote inconsistent discounts and bleed margin through the back door.
Typical markup by industry
- Grocery: 10–15% markup (very tight).
- Apparel retail: 100–150% markup (keystone pricing is 100%).
- Restaurants: 200–300% markup on food, 400%+ on drinks.
- Jewelry: 200–400% markup.
- Ecommerce (DTC): 150–250% markup after fees.
- Construction: 20–35% markup on materials, higher on labor.
- Auto parts retail: 30–50% markup.
These are starting points. Premium brands, niche products, and low-volume categories can command much higher markup because pricing power is built on brand rather than direct cost comparison.
Keystone pricing and why it is disappearing
Keystone pricing — doubling cost to get selling price — was the default in retail for a century. It creates a clean 50% margin. It is still a sensible starting point, but modern direct-to-consumer economics usually require higher markup because marketing, fulfillment, and return costs are loaded on top of COGS. If you are running a Shopify store with $5 of COGS, $10 keystone pricing will not cover $4 of ad spend and $2 of shipping. You will lose money on every sale.
Use markup to stay consistent, margin to stay healthy
The best small businesses use markup as an operational rule — every item in the store gets a category-level markup — and review margin as a health metric. If store-wide margin drifts below your target, you either raise markup, change your product mix, or negotiate costs down. The profit margin calculator and pricing calculator help you pressure-test markup decisions against real profitability.
A worked example for a retail store
Say you buy a mug at $4 from a wholesaler. Your category markup is 150%, so you sell at $10. Profit per unit is $6, margin is 60%. If credit card fees take 3% ($0.30) and shipping or bag costs add $0.50, your effective margin drops to 52%. At 200 units sold per month, that is $1,040 contribution — not $1,200 — toward fixed costs. The markup calculator gives you the starting line; the margin calculator keeps you honest about what actually reaches the bottom.
When to change markup
Markup should not be sacred. Review it annually at minimum. Increase markup when supplier costs rise, when demand exceeds capacity, or when you add services (delivery, installation) that should be priced in. Decrease markup only for specific promotions with a clear volume goal — never as a panic response to a slow week. Panic discounts train customers to wait for the next sale.