Profit Margin Calculator

Profit Margin Guide

What's the difference between Margin and Markup?

Margin and markup are often confused. Gross margin = (Revenue − COGS) / Revenue × 100. Markup = (Revenue − COGS) / COGS × 100. They use different denominators. A product costing £60 selling for £100: margin = 40%, markup = 66.7%. A 50% markup does not give a 50% margin — it gives a 33.3% margin. This distinction matters for pricing: to achieve a 50% margin, use a 100% markup (double the cost). To achieve a 40% margin, divide cost by 0.6.

What's the key thing to understand about Industry Gross Margin Benchmarks?

Gross margins vary enormously by industry. Software: 70–90% (low direct costs). Financial services: 50–80%. Retail (online): 30–50%. Grocery / supermarket: 20–30%. Manufacturing: 20–40%. Restaurant: 60–70% (food cost 30–40%, the rest is labour and overhead). Construction: 15–25%. Car manufacturing: 10–20%. These are gross margins before operating expenses. Net margins are much lower once salaries, rent, and overheads are deducted.

What's the key thing to understand about Calculating Your Target Price?

To achieve a target gross margin from a known cost: Selling price = Cost / (1 − target margin). For a 40% margin with £60 cost: £60 / (1 − 0.40) = £60 / 0.60 = £100. For a 50% margin: £60 / 0.50 = £120. This formula is essential for pricing — working backwards from a target margin is more reliable than adding a fixed percentage markup and hoping the margin works out.

What do I need to know about Improving Profit Margins?

Three levers: increase price (most powerful — a 1% price increase typically improves operating profit by 7–11%), reduce cost of goods (supplier negotiation, economies of scale, process efficiency), or reduce operating expenses (operational efficiency, fixed cost leverage). For small businesses, price increases are usually the fastest route to better margins — even 5% increases are rarely noticed by customers if delivered with a value justification, but can transform profitability.

What's the key thing to understand about Net Margin vs Gross Margin?

Gross margin (revenue minus the direct cost of producing what you sell, divided by revenue) only accounts for the cost of goods sold — materials, production labour, or wholesale purchase cost. Net margin goes further, deducting every other cost of running the business: rent, salaries not tied directly to production, marketing, insurance, loan interest, and tax, divided by revenue. A business can have a healthy 60% gross margin and still be unprofitable overall if its overheads are too high relative to sales, while a business with a thinner 25% gross margin can be comfortably profitable if it runs lean on overheads. Comparing businesses — or comparing your own business year to year — on gross margin alone can be misleading, since it says nothing about whether the business as a whole makes money; net margin is the figure that answers 'is this business actually profitable', while gross margin answers the narrower question of 'how much room is there in what I charge versus what the product itself costs to make or source'.

What should I know about Margin Erosion from Discounting?

Discounts have an outsized effect on profit margin that's easy to underestimate because the impact isn't linear with the discount percentage. If a product sells for £100 with a 30% margin (£30 profit, £70 cost), a seemingly modest 10% discount brings the price to £90 — but since costs stay at £70, profit falls to £20, a 33% drop in profit from only a 10% price cut. The lower the starting margin, the more dramatic this effect becomes: a product with a thin 10% margin can see profit wiped out entirely by a 10% discount. This is why high-volume, low-margin retailers are typically far more cautious about discounting than high-margin specialty businesses — they have much less room to absorb a price cut before it turns a sale unprofitable. Before running a promotion, it's worth calculating the exact profit impact (not just the revenue impact) of the discount, and checking whether the expected increase in sales volume is realistically large enough to make up for the lower profit earned on each individual sale.

Contribution Margin vs Profit Margin: Why Pricing Decisions Need Both

Profit margin, whether gross or net, tells you how profitable the business is overall, but contribution margin is the figure that actually drives whether an individual product, order, or extra unit of sales is worth pursuing. Contribution margin is calculated as revenue minus variable costs only, the costs that scale directly with each unit sold, like materials and direct labour, leaving out fixed costs such as rent or salaried staff that don't change with volume. A product can have a healthy contribution margin and still appear to drag down overall net margin if the business hasn't yet sold enough volume to cover its fixed costs, which is normal for a growing business rather than a sign the product itself is unprofitable. This distinction matters most when deciding whether to take on an extra order at a discounted price, run a promotion, or add a new product line: as long as the price covers variable costs and contributes something toward fixed costs, it can be a rational decision even if it looks unattractive measured purely against the business's existing overall profit margin, because the comparison that matters for that specific decision is contribution margin, not the blended margin across everything already being sold.

Worked Example: From Revenue to Margin and Markup

A product sells for £50 and costs £32 to produce or buy in (cost of goods sold). Gross profit is £50 − £32 = £18. Gross margin is gross profit divided by selling price: £18 / £50 = 36%. Markup, by contrast, is gross profit divided by cost: £18 / £32 = 56.25%. Notice the two percentages describe exactly the same £18 of profit but look very different because they use different denominators — this is the single most common source of pricing confusion in small businesses. If the business also has £5 of variable selling costs per unit (packaging, payment processing, delivery), contribution margin per unit falls to £13, or 26% of the selling price. That contribution margin is what actually needs to cover fixed overheads like rent and salaries before anything becomes net profit, which is why a healthy gross margin can still coexist with a business that isn't profitable overall.

Margin and Markup Conversion Reference

Because margin and markup answer different questions from the same raw numbers, it helps to see several common percentages side by side rather than trying to convert between them mentally under pressure.

The general conversion formulas are: markup = margin / (1 − margin), and margin = markup / (1 + markup), both expressed as decimals before converting back to a percentage. A useful sanity check when setting prices is to work backwards from your target margin using this table rather than simply adding a flat markup percentage to cost, since a flat markup on cost will always produce a lower margin percentage than the markup figure suggests.