Markup vs Margin: Why a 40% Markup Is Only a 28.6% Margin

A price that is 40% above cost is not a 40% margin. It is a 28.6% margin, and the gap between those two numbers is why so many small retailers break even on product they thought was marked up generously. Set the digit in the wrong box and you will price a whole catalog against the wrong target.

Markup and margin describe the same dollar amount from opposite ends of the price tag, and the two directions of the calculation are not mirror images. This guide covers the arithmetic, the pricing targets that actually work for small sellers and service businesses, and the ways the two figures get confused on invoices and quotes. Open the free online calculator if you want to follow the numbers while you read.

The Two Definitions, Written Plainly

Markup is profit divided by cost. Margin is profit divided by selling price. Both start from profit = price − cost; they differ only in the denominator.

Cost	Markup	Price	Profit	Margin
$60	25%	$75.00	$15.00	20.0%
$60	50%	$90.00	$30.00	33.3%
$60	100%	$120.00	$60.00	50.0%
$60	150%	$150.00	$90.00	60.0%
$60	200%	$180.00	$120.00	66.7%

Notice the asymmetry: a 100% markup lands on a 50% margin, and doubling the markup from 100% to 200% only moves the margin from 50% to 66.7%. Margin has a hard ceiling of 100%, which it approaches but never reaches, while markup can be any number above zero.

Converting One to the Other

To go from markup to margin: margin = markup ÷ (1 + markup). To go from margin to markup: markup = margin ÷ (1 − margin). Both use decimals — 40% is 0.40, not 40.

Worked through: a 60% markup gives 0.60 ÷ 1.60 = 0.375, a 37.5% margin. A 25% target margin requires 0.25 ÷ 0.75 = 0.333, a 33.3% markup. These conversions are where the expensive mistakes happen, because the two percentages are close enough at low values to look interchangeable and far enough apart at high values to ruin a month.

If you know the markup	Margin	If you know the margin	Markup
10%	9.1%	10%	11.1%
20%	16.7%	20%	25.0%
33.3%	25.0%	25%	33.3%
50%	33.3%	33.3%	50.0%
75%	42.9%	40%	66.7%
100%	50.0%	50%	100%

Pricing Backwards From the Margin You Need

Most healthy businesses set a margin target first and derive the price. The formula is price = cost ÷ (1 − target margin). A $42 landed cost at a 35% target margin needs $42 ÷ 0.65 = $64.62. Applying a 35% markup instead would give $56.70 — a price that is 12% below the target and, across 500 units a month, about $3,900 of gross profit quietly lost.

The gap widens the moment costs include freight. If the $42 landed cost was built from a $30 factory price plus $12 of freight and duties, then the same 35% markup applied only to the factory price gives $40.50 — below the true cost, and a guaranteed loss on every unit sold. Recompute landed cost before applying either percentage, or the pricing model fails at the first rate change.

For service businesses the same arithmetic applies with labour as the cost base. A contractor with a $68/hour loaded labour cost and a 40% gross margin target needs to bill $68 ÷ 0.60 = $113.33/hour. Billing $95 on a “44% markup” instinct leaves 28.5% margin, which usually does not cover overhead. A spreadsheet or any four-function calculator handles the division; the risk is the decimal place, not the arithmetic.

Three Mistakes That Repeat Across Small Businesses

1. Mixing the denominators across a catalog. When one product line is priced by markup and another by margin, a “blended 40%” report hides the fact that the markup-priced line is running at 28.6%. Recompute every line on the same basis before comparing it to a target.

2. Confusing gross margin with net profit. A 40% gross margin on $100,000 of revenue is $40,000 of gross profit — before rent, wages, fees and returns. Businesses that price to “a 20% margin” often discover that after card processing at 2.9% and returns at 6%, the net is closer to 8%.

3. Forgetting that discounts are applied to price, not cost. A 15% discount off a 40% margin product does not reduce profit by 15% — it reduces it by 37.5%. Margin after discount = (1 − 0.15) × original margin divided by the discounted revenue, and the shrinkage compounds fast. This is the same percentage trap that makes restaurant tips shift faster than people expect, covered in our piece on tipping guide.

Frequently Asked Questions

Is a 50% markup the same as a 50% margin? No. A 50% markup on a $100 cost gives a $150 price and a $50 profit, which is a 33.3% margin. A 50% margin requires a 100% markup — a $200 price.

Which one should appear on an invoice? Generally neither. Invoices show line items and totals; showing cost is unusual and often unwanted. Keep markup and margin as internal pricing tools, and quote the final price.

Can margin and markup ever be equal? Only at zero. For any positive profit they diverge immediately, and the gap widens as the numbers grow.

A One-Page Check You Can Repeat

Write down cost, target margin, and the calculated price for each product. Then work forward from the price to confirm the margin lands where you intended — the two-direction check catches the denominator mix-up faster than any spreadsheet audit.

Run the conversion once with the free online calculator open in another tab, and keep the resulting table for the products you price most often. Two percentages, one price, and the habit of confirming which way the division runs is most of what separates a pricing decision from a pricing guess.