I Marked Everything Up 40% for Black Friday and Made Thousands Less Than I Planned. Markup Isn't Margin
Last November I priced 500 hand-poured candles for Black Friday. Each cost me $12 to make, I wanted a 40% profit, and I typed "cost × 1.4" into a spreadsheet: $16.80 each. When the dust settled I'd cleared $2,400 on those candles. My plan had said $4,000. Nothing was wrong with sales — the mistake was in the first cell of the spreadsheet. I'd used a 40% markup when what I actually wanted was a 40% margin. They are not the same number, and the gap cost me $1,600.
⚠️ Disclaimer
This article is for informational purposes only and does not constitute financial or tax advice. Always consult a qualified accountant for your specific situation.
If you sell anything — on Etsy, Shopify, a market stall, or as a freelancer quoting projects — this guide shows how profit margin vs markup actually differs, how to convert between them, and how to price backward from the profit you want before the holiday rush begins.
What Is the Difference Between Profit Margin and Markup?
Profit margin is profit expressed as a percentage of the selling price, while markup is profit expressed as a percentage of the cost. The same $8 of profit on a $20 sale is a 40% margin but a 66.7% markup, because the first divides by $20 and the second by $12. Accounting bodies and investors report margin; many retailers and tradespeople price with markup.
Markup % = (Price − Cost) ÷ Cost × 100
Because cost is always smaller than price, markup is always the bigger number for the same sale. A 100% markup (doubling your cost) is only a 50% margin. That's the trap: a number that sounds generous turns out to be a smaller slice of revenue than you assumed.
How Did a 40% Markup Cost Me $1,600?
Here are both pricing approaches side by side for my $12 candle, sold in a batch of 500:
| Method | Price | Profit each | Batch profit |
|---|---|---|---|
| 40% markup | $16.80 | $4.80 | $2,400 |
| 40% margin | $20.00 | $8.00 | $4,000 |
The markup price of $16.80 is only a 28.6% margin ($4.80 ÷ $16.80). To really earn 40% of revenue, the price had to be $20. I was charging $3.20 too little on every unit and, with 500 units out the door, couldn't get it back.
Key Takeaway
A markup of X% always produces a margin smaller than X%. If your goal is "keep 40 cents of every dollar I take in," you need a 40% margin, which is a 66.7% markup on cost.
How Do You Convert Markup to Margin?
The conversion is simple algebra, and it's worth memorising:
Markup = Margin ÷ (1 − Margin)
Here are the common pairs (kept to two columns so it reads on a phone):
| Markup | Equals margin |
|---|---|
| 25% | 20.0% |
| 50% | 33.3% |
| 100% | 50.0% |
| 150% | 60.0% |
| Margin | Needs markup |
|---|---|
| 20% | 25.0% |
| 30% | 42.9% |
| 40% | 66.7% |
| 50% | 100.0% |
The same trap exists worldwide. A UK stallholder who adds 30% to a £35 cost prices at £45.50. The £10.50 profit is £10.50 ÷ £45.50 = 23.1% of the price, so a 30% markup is only a 23.1% margin. In Australia, A$80 stock with a 25% markup sells at A$100, which is a 20% margin. Different currencies, identical pitfall.
💡 Pro Tip
Pick one term and use it everywhere — in spreadsheets, supplier talks, and with your accountant. Most mix-ups happen when one person says "40% on top" and another hears "40% margin."
How Do You Price for a Target Margin?
Target-margin pricing is setting your selling price by dividing cost by one minus the margin you want, so the profit is a guaranteed share of every sale. It's the method behind most retail price lists, and it's a one-line formula:
Three worked examples:
- US: $12 candle, 40% margin → $12 ÷ 0.60 = $20.00
- UK: £35 item, 30% margin → £35 ÷ 0.70 = £50.00
- Australia: A$80 stock, 50% margin → A$80 ÷ 0.50 = A$160.00
Remember, this is gross margin. Marketplace fees, shipping, and ad spend still come out afterwards. If you sell on Etsy, run the numbers through the Etsy profit calculator as well, and check how many sales you need to cover fixed costs with the break-even calculator.
What Does a Black Friday Discount Do to Your Margin?
Discounts are applied to the price, but your cost doesn't move, so margin shrinks faster than the discount looks. Take the $20 candle with a $12 cost (40% margin) and put it on sale at 20% off:
- Sale price: $20 × 0.80 = $16.00
- Profit: $16 − $12 = $4.00 (was $8.00)
- New margin: $4 ÷ $16 = 25%
A 20% discount cut profit per unit in half. You'd need to sell twice as many units just to earn the same total profit. According to the standard break-even volume logic, required unit sales rise by the old profit divided by the new profit — here 8 ÷ 4 = 2×. Before advertising a 20%-off sale, check what it does with the discount calculator.
⚠️ Note
Thin-margin products can't afford deep discounts at all. At a 25% margin, a 25% discount sends your profit on that item to zero.
Frequently Asked Questions
Is markup or margin more important?
Margin is better for judging profitability because it's tied to revenue, which is what you report and pay tax on. Markup is a handy pricing shortcut, as long as you know the margin it produces.
Can margin ever be above 100%?
No. Margin is a share of the selling price, so the maximum is 100% (a zero-cost item). Markup has no ceiling — a 300% markup is perfectly possible.
What is a good profit margin for a small online shop?
Gross margins of 40–60% are common for handmade and specialty goods, since fees, shipping, and advertising still take a large bite. Reseller and grocery-style businesses often work on 10–30%. Compare against your own sector, not a universal number.
Is gross margin the same as net margin?
No. Gross margin only subtracts the direct cost of the product. Net margin subtracts all expenses, including fees, rent, software, and tax, so it is always lower.
How do I turn a margin into a markup quickly?
Divide the margin by one minus the margin. A 30% margin gives 0.30 ÷ 0.70 = 42.9% markup. The profit margin calculator does it for you automatically.
Try It Yourself
The whole lesson fits in one sentence: markup is profit over cost, margin is profit over price, and they only look alike at very small percentages. Before you set Black Friday prices, enter your cost and either target into the profit margin calculator to see the exact price, margin and markup side by side. Then stress-test the sale with the discount calculator and the break-even calculator.
