A good profit margin for a UK small business depends entirely on the industry you operate in. However, most healthy SMEs run a net margin between 5% and 20%. Below 5% means trouble. This article shows you the real benchmarks, why your margin probably isn’t where you think it is, and the four levers that move it.
Sarah runs a catering business in Manchester. Last year her revenue hit £340,000 — the best year she had ever recorded. So she felt like the business was finally winning.
Then her accountant sent the year-end accounts. Net profit: £19,400. Effective hourly rate, after the 60-hour weeks she was working: under £8.
Sarah was busy. However, she wasn’t actually making money. Therefore the question she really needed to ask was not “how do I grow revenue?” but “what is a good profit margin for a business like mine, and why is mine so far below it?”
This is the question almost no one asks until something breaks. As a result, owners spend years optimising for the wrong number.
The two profit margins that matter
Before you can judge whether your margin is good, you need to understand which margin you are actually looking at. Most owners conflate two very different numbers.
Gross profit margin is what’s left after the direct costs of delivering your product or service. So if you sell £100 of cakes and the ingredients plus packaging cost £40, your gross margin is 60%.
Net profit margin is what’s left after every cost — rent, wages, software, insurance, your own salary, tax. Therefore it tells you the real story. Net margin is the number that pays you, funds growth, and keeps you safe.
You need both. However, if you only track one, track net.
What a good profit margin actually looks like in the UK
Industry matters more than almost any other factor. As a result, “what’s a good profit margin?” is a question with five different right answers depending on what you do.
Typical UK SME net profit margin benchmarks
Below are realistic ranges based on industry data and what financial advisors typically see. These are net margin (after all costs, before tax).
- Professional services (consulting, accounting, legal): 15% to 30% — high if run lean, lower if heavily staffed
- Software and SaaS: 15% to 40% — strong gross margins but customer acquisition costs eat into net
- Construction and trades: 5% to 15% — material cost volatility makes anything above 10% impressive
- Retail (physical): 2% to 8% — high turnover, low margin
- Hospitality and food: 3% to 9% — labour and wastage compress margins
- Manufacturing: 5% to 12% — depends heavily on scale and inventory management
- Marketing agencies: 10% to 25% — staff costs are the variable
- E-commerce: 5% to 15% — ads and shipping erode the gross margin quickly
However, treat these as a sense check, not a target. Furthermore, your specific business will have factors that justify being above or below the band.
Why most SME owners don’t actually know their margin
Ask 100 UK business owners what their net margin was last year. Maybe 20 will give you a confident, accurate number. Most will guess. So the first problem isn’t a bad margin — it’s not knowing the margin at all.
There are three reasons this happens.
First, accounting software shows the data but rarely the percentage. Therefore, owners look at “profit £24,500” without comparing it to revenue.
Second, owner salaries are often understated. As a result, the “profit” looks bigger than it really is. If you’re paying yourself £15,000 a year while doing a £55,000 job, the missing £40,000 is hidden cost.
Third, year-end accounts arrive nine months late. By then, the patterns that hurt your margin have run for over a year.
Meanwhile, the businesses that grow calmly review their margin every month. They don’t wait for the accountant.
How to know if your margin is healthy
Use the calculator below to check yours against typical UK SME ranges. You only need three numbers from your accounts.
The four levers that actually move your margin
Improving a profit margin isn’t mysterious. There are four levers, and only four. So if you want to shift the number, you have to pull one of these.
For a deeper dive on managing both gross and net, see our profitability articles. The HMRC guidance on allowable business expenses is also worth a read if you’re checking which costs are valid deductions.
Don’t confuse a healthy bank balance with a healthy margin. A business can have £80,000 sitting in its account and still be running at 2% net margin — which means one slow month away from problems. Cash is timing. Margin is the engine.
What to do this week
Start small. Pull your last 12 months of revenue and total costs. Calculate your gross and net margin. Compare both against the industry band above. Therefore you’ll know within 15 minutes whether you have a margin problem or not.
If the answer is yes, pick one of the four levers and act on it within the month. Furthermore, recheck the margin every month going forward. Most owners who do this consistently lift their net margin by 3 to 5 percentage points within a year — which on a £300,000 business is £9,000 to £15,000 of pure profit.
A good profit margin isn’t a fixed number — it’s whatever’s healthy for your industry, plus a buffer for resilience. Below 5% you’re vulnerable. In your industry’s normal band, you’re functioning. Above it, you have options. Know yours, track it monthly, and pull one of the four levers when it slips. That’s the entire game.
