How to Read Your Gross Margin — and What to Do When It Is Too Low

Gross margin is one of the most important numbers in any business — and one of the most misunderstood. Most SME owners know roughly what theirs is. Far fewer know whether it is actually healthy, what is driving it, or how to improve it systematically.

This article explains what gross margin really tells you, how to benchmark it against your sector, and the five levers you can pull to improve it without necessarily raising prices.

What gross margin actually measures

Gross margin measures how much of each pound of revenue is left after paying the direct costs of delivering your product or service. The formula is:

It does not include your overheads — rent, salaries, marketing, software. Those come out later to give you your net margin. Gross margin tells you whether the core trading activity of your business is commercially viable before overhead costs are applied.

Gross margin vs markup — why the confusion matters

Many business owners confuse margin with markup, and the difference costs them money. Markup is calculated on cost. Margin is calculated on revenue.

If you buy a product for £60 and sell it for £100, your markup is 67%. But your gross margin is 40%. If you set a target of "50% margin" and accidentally apply 50% markup, you will end up with a 33% margin — significantly below target.

Always confirm which calculation your pricing decisions are based on.

What is a healthy gross margin for a UK SME?

There is no single right answer — it depends heavily on sector. As a general guide:

• Software / SaaS: 65–85%
• Professional services: 50–70%
• Retail (own brand): 45–65%
• Retail (resale): 30–50%
• Distribution / wholesale: 20–35%
• Manufacturing: 25–45%
• Food & drink: 30–55%

If your gross margin is below your sector benchmark, there are only four explanations: your prices are too low, your direct costs are too high, your product mix is skewed toward low-margin lines, or some combination of the three.

Five levers to improve gross margin

1. Reprice your worst-performing products

Not all products carry equal margin. Most businesses have a small number of high-margin products that subsidise a larger number of low-margin ones. Identify your bottom quartile by gross margin and either reprice, restructure the cost, or discontinue. A 3% price increase on your full revenue line adds £30k to gross profit on a £1m revenue base — with no increase in costs.

2. Renegotiate your supply chain

Direct cost is the denominator in your gross margin calculation. Every 1% reduction in your cost of goods improves your gross margin directly. Volume commitments, longer contract terms, and faster payment can all be traded for better pricing — but only if you negotiate them explicitly.

3. Fix your landed cost calculation

Importers frequently underprice because they cost goods at purchase price rather than true landed cost. Freight, duty, port handling, customs clearance, and domestic delivery can add 25–55% to the factory cost. If your pricing does not account for the full landed cost, your reported gross margin is misleading.

4. Shift your product mix

You do not have to sell more to improve gross margin — you can sell differently. Actively promoting higher-margin products, bundling low-margin items with high-margin ones, and retiring or repositioning your lowest contributors all improve blended gross margin without requiring price increases across the board.

5. Reduce returns and quality costs

Returns, rework, and quality failures are direct cost line items that erode gross margin invisibly. Track your returns rate by product and supplier. Even a 1% reduction in returns on a product business typically adds 0.5–1.5% to gross margin depending on your cost structure.

Gross margin is a leading indicator

Net profit tells you what happened. Gross margin tells you what is about to happen. A business with declining gross margin and growing revenue is building a problem it will not see until it is too late to fix without pain. Track it monthly, benchmark it by product line, and treat any unexplained movement as a priority investigation.