What Is Profit Margin?
Profit margin is the percentage of revenue left over after subtracting costs. If you sell something for $100 and it costs you $60 to produce, your profit is $40 and your profit margin is 40%. It's one of the most important metrics in business because it tells you how efficiently you're converting sales into actual profit.
The formula is straightforward:
Profit Margin (%) = (Revenue − Cost) ÷ Revenue × 100
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Enter your cost and revenue below to see your gross margin, profit amount, and markup percentage instantly:
Margin vs. Markup: The Difference That Trips Everyone Up
This is where most people get confused — and getting it wrong can cost you real money when pricing products.
Margin is calculated as a percentage of revenue. Markup is calculated as a percentage of cost. Same dollar profit, completely different percentages.
| Metric | Formula | Example ($60 cost, $100 revenue) |
|---|---|---|
| Profit | Revenue − Cost | $100 − $60 = $40 |
| Margin | Profit ÷ Revenue × 100 | $40 ÷ $100 = 40% |
| Markup | Profit ÷ Cost × 100 | $40 ÷ $60 = 66.7% |
Notice that a 40% margin is the same as a 66.7% markup. If you tell your supplier you want a 40% margin but they apply a 40% markup, you'll end up with less profit than expected.
Converting Between Margin and Markup
- Margin → Markup: Markup = Margin ÷ (1 − Margin)
- Markup → Margin: Margin = Markup ÷ (1 + Markup)
For a 40% margin: Markup = 0.40 ÷ (1 − 0.40) = 0.40 ÷ 0.60 = 66.7%
For a 50% markup: Margin = 0.50 ÷ (1 + 0.50) = 0.50 ÷ 1.50 = 33.3%
Types of Profit Margin
Not all profit margins measure the same thing. Here are the three you'll encounter most often:
Gross Profit Margin
Gross margin only accounts for the direct cost of producing your product or service (called Cost of Goods Sold, or COGS). It ignores overhead like rent, salaries, and marketing.
Gross Margin = (Revenue − COGS) ÷ Revenue × 100
A SaaS company might show an 80% gross margin because server costs are low — but once salaries and marketing are included, net margin drops considerably.
Operating Profit Margin
This subtracts operating expenses (rent, payroll, utilities) on top of COGS. It shows how efficiently the business runs its core operations.
Net Profit Margin
Net margin is the bottom line — what's left after everything, including taxes and interest. This is the number investors care about most.
Net Margin = Net Income ÷ Revenue × 100
What Is a Good Profit Margin?
"Good" depends entirely on the industry. A 5% margin that would be terrible for a software company can be excellent for a grocery store.
| Industry | Typical Gross Margin | Typical Net Margin |
|---|---|---|
| Software / SaaS | 70–85% | 10–25% |
| E-commerce | 30–50% | 2–5% |
| Restaurants | 60–70% (food cost) | 3–9% |
| Retail (apparel) | 40–60% | 5–10% |
| Manufacturing | 25–40% | 5–10% |
| Consulting / Agency | 50–70% | 15–30% |
The key is to track your margin over time and compare it to competitors in your industry — not against some universal standard.
Real-World Pricing Example
Say you're a small business owner selling handmade candles. Each candle costs $8 in materials and takes $4 of labor to make, so your total cost per unit is $12.
You want to target a 45% profit margin. What should you charge?
Price = Cost ÷ (1 − Margin)
Price = $12 ÷ (1 − 0.45) = $12 ÷ 0.55 = $21.82
Round up to $22. Now let's verify: ($22 − $12) ÷ $22 = $10 ÷ $22 = 45.5% margin. ✓
If instead you'd mistakenly applied a 45% markup: $12 × 1.45 = $17.40 — you'd be charging $4.40 less and your margin would only be 31%, not 45%.
How Discounts Destroy Margin
One of the most dangerous things for profit margin is discounting without understanding the math. If your current margin is 40% and you offer a 10% discount, your new margin is:
New Price = $100 × 0.90 = $90
New Margin = ($90 − $60) ÷ $90 = 33.3%
You cut your price by 10% but your margin dropped by 6.7 percentage points — a 16.75% relative decline in profitability. The lower your starting margin, the more devastating discounts become.
Use our discount calculator to model the impact before running a sale.
Using Margin to Set Sales Targets
Once you know your margin, you can work backwards to set revenue targets. If your business has $50,000 in monthly fixed costs and a 40% gross margin, you need at least:
Break-even Revenue = Fixed Costs ÷ Gross Margin
$50,000 ÷ 0.40 = $125,000/month just to cover fixed costs.
Want to earn $20,000 in profit on top of that?
($50,000 + $20,000) ÷ 0.40 = $175,000/month
This kind of reverse calculation is what makes margin so powerful as a planning tool.
Quick Reference: Margin Formulas
| What You Want | Formula |
|---|---|
| Profit amount | Revenue − Cost |
| Margin % | (Revenue − Cost) ÷ Revenue × 100 |
| Markup % | (Revenue − Cost) ÷ Cost × 100 |
| Selling price from margin | Cost ÷ (1 − Margin) |
| Selling price from markup | Cost × (1 + Markup) |
| Break-even revenue | Fixed Costs ÷ Gross Margin |
Related Calculators
Margin is just one piece of the pricing puzzle. These tools complement it:
- Discount Calculator — See exactly how much margin you give up when you discount
- Markup Calculator — Calculate selling price from cost using markup percentage
- Percentage Calculator — General percentage math for quick calculations