Profit margin is one of the most important numbers in any business. It tells you how much of every pound of revenue you actually keep as profit — after paying the costs of delivering your product or service. If you are running a UK business and do not know your profit margin, you are effectively flying blind.
This guide explains exactly what profit margin is, how to calculate it, what counts as a good margin in the UK, and how to improve yours.
What Exactly Is Profit Margin?
Profit margin is the percentage of revenue that remains as profit after costs are deducted. It is expressed as a percentage — the higher the percentage, the more profit you keep from every pound you earn.
Think of it this way: if your profit margin is 30%, it means for every £100 of revenue, you keep £30 as profit and spend £70 delivering the product or service.
There are two types you will encounter most often:
Gross profit margin measures profit after deducting only the direct costs of producing your product or delivering your service — materials, manufacturing costs, or the wholesale price of goods. It does not include overheads like rent, salaries, or marketing.
Net profit margin measures profit after deducting absolutely everything — direct costs, overheads, operating expenses, interest payments, and tax. This is the real number that shows how profitable your business truly is.
The Profit Margin Formula
Profit Margin % = ((Revenue − Cost) ÷ Revenue) × 100
Here is a worked example:
- Selling price: £100
- Cost to make or buy: £60
- Gross profit: £40
- Gross profit margin: (£40 ÷ £100) × 100 = 40%
That means you keep 40p from every £1 of revenue — before accounting for any overheads.
£Gross Margin vs Net Margin
This distinction matters enormously — and many business owners muddle the two.
Gross margin subtracts only the cost of goods sold (COGS). For a product business, that is the manufacturing or wholesale cost. For a service business, it might be direct labour and materials. Rent, salaries, software, and marketing are not included.
Net margin subtracts everything. It is calculated after all operating costs, interest, and tax have been paid. It tells you what genuinely remains for the business owner.
A business can have an impressive 65% gross margin but a wafer-thin 3% net margin if overheads are high. This is common in food and hospitality — high gross margins on individual items, but high staffing and premises costs that eat into net profit.
| Type | What It Deducts | What It Tells You | |---|---|---| | Gross Margin | Direct production costs only | Pricing efficiency | | Net Margin | All costs including overheads and tax | Real profitability |
Always specify which margin you mean when discussing your business with accountants, investors, or business partners.
Margin vs Markup — The Most Costly Confusion in Business
Margin and markup sound similar. They are not. Confusing them leads to serious pricing errors — and many business owners have unknowingly sold at a loss because of this mistake.
Margin = profit as a percentage of the selling price
Markup = profit as a percentage of the cost price
Margin % = (Profit ÷ Selling Price) × 100 Markup % = (Profit ÷ Cost Price) × 100
Here is a concrete example that shows why this matters:
- Cost price: £60
- Selling price: £100
- Profit: £40
Margin = (£40 ÷ £100) × 100 = 40% Markup = (£40 ÷ £60) × 100 = 66.7%
The same transaction produces a 40% margin but a 66.7% markup. They are not interchangeable. A 50% markup does not give you a 50% margin — it gives you a 33.3% margin.
If you tell your accountant you have a 50% margin when you mean a 50% markup, your profitability will appear 50% better than it actually is. Always clarify which one you mean.
What Is a Good Profit Margin for a UK Business in 2026?
There is no universal answer — a good margin depends entirely on your industry. A 5% net margin is excellent for a supermarket chain and concerning for a software business.
Here are typical margins for UK businesses in 2026:
| Industry | Gross Margin | Net Margin | Verdict | |---|---|---|---| | Software / SaaS | 60–80% | 15–25% | Excellent | | Professional Services | 30–50% | 10–20% | Good | | Manufacturing | 20–35% | 5–15% | Average | | Food & Beverage | 60–70% | 3–9% | Thin net | | Retail (General) | 30–50% | 2–5% | Thin | | Grocery / Supermarket | 25–35% | 1–3% | Very thin |
As a general rule for UK small businesses:
- Net margin above 20% — excellent. Strong business with pricing power.
- Net margin 10–20% — healthy. Well-run with room for investment.
- Net margin 5–10% — acceptable. Tight but viable if costs are controlled.
- Net margin below 5% — risky. Very little buffer for unexpected costs.
- Net margin below 0% — loss-making. Urgent action required.
Service businesses (consulting, software, design) almost always have higher margins than product businesses because their primary cost is time, which scales better than physical goods.
Why Tracking Margin Monthly Matters
Many business owners only discover their margin has eroded at year end — by which point months of profit have been lost. Tracking margin monthly lets you:
Spot cost creep early. Supplier price increases, rising energy costs, and scope creep in labour all compress margins gradually. Monthly tracking catches these trends before they become serious.
Identify your most profitable products. Not all products or services earn the same margin. Knowing which earn the most lets you focus your sales and marketing where it matters.
Make pricing decisions with confidence. When a client asks for a discount, knowing your margin tells you exactly how much room you have — and what crossing that line actually costs you.
Attract investment or finance. Any bank, investor, or acquirer will scrutinise your margins. A consistently strong margin tells a story of a well-run business.
How to Improve Your Profit Margin
There are only two fundamental levers: increase your revenue without proportionally increasing costs, or reduce costs without reducing revenue.
Raise your prices. This is often the single most impactful action available, yet many business owners resist it. A 10% price increase on a 30% margin product increases gross profit by 33% — assuming the same volume. Test small increases before applying them broadly.
Renegotiate supplier costs. Even a 5% reduction in your cost of goods sold meaningfully improves margin. Consolidating suppliers, increasing order volumes, or simply asking for a better deal are all worth trying.
Focus on your highest-margin products. If 20% of your products generate 80% of your profit, shifting more of your sales effort toward those products improves overall margin without increasing workload.
Audit your overheads. Many UK businesses overpay for software subscriptions, insurance, and supplier contracts simply because no one has reviewed them recently. A quarterly overhead audit often surfaces meaningful savings.
Cut low-margin clients. In service businesses, some clients are profitable and some are not. Identifying and gradually replacing low-margin client relationships with higher-value ones is a proven path to margin improvement.
⚖️Frequently Asked Questions
Can my gross margin be too high? In theory, no — but an unusually high gross margin compared to competitors may indicate you are underestimating your true costs of goods sold, which will distort your financial picture.
What is a good gross margin for an ecommerce business? UK ecommerce businesses typically target 30–50% gross margin. After platform fees, shipping, and returns, net margins are often 10–20%. Use our 🛒
Should I include my own salary in the margin calculation? For net margin, yes — your salary is an operating expense. Many sole traders and directors overlook this, which makes their business appear more profitable than it is.
Last updated April 2026. For specific financial advice, consult a qualified UK accountant.