Gross Margin vs Profit Margin: What UK SMEs Must Know

For UK small and medium-sized enterprises, understanding gross margin and profit margin is more than accounting theory. These measures help you set prices, plan growth and see whether your business can support borrowing. Lenders and investors may review profitability alongside cash flow, trading history and existing commitments when assessing risk.

This guide explains how to calculate gross and net profit margins, what each tells you about your business, and practical ways to improve them.

Why margins matter more than revenue

Revenue alone does not show whether a business is healthy. A company can increase sales and still run short of cash if the costs of making those sales are too high or if overheads absorb the remaining income.

Margins show how much of each pound of revenue remains after costs. They can help you understand whether your prices cover production, whether overheads are under control, and whether the business is generating enough profit to reinvest or meet loan repayments. Stable margins can also help a lender understand how the business has performed over time. Since profitability and cash availability are different, read our guide to cash flow problems and solutions for ways to manage the timing of money in and out of the business.

What is gross profit?

Gross profit is the amount left after subtracting the direct costs of making or delivering the goods or services you sell. These costs are often called cost of goods sold (COGS), or cost of sales. They may include raw materials, direct production labour, packaging and other costs directly tied to fulfilling a sale.

Gross Profit = Revenue − Cost of Goods Sold

For example, if your business earns £100,000 in revenue and spends £60,000 on COGS, its gross profit is £40,000.

Gross profit helps you assess the economics of your core products or services. It does not usually include costs such as rent, marketing, administrative salaries, loan interest or tax. Those costs are accounted for later when calculating net profit.

What is gross margin?

Gross margin expresses gross profit as a percentage of revenue. It shows how many pence of each pound of sales remain after direct costs.

Gross Margin (%) = (Gross Profit ÷ Revenue) × 100

Using the example above:

• Gross profit: £40,000
• Revenue: £100,000
• Gross margin: (£40,000 ÷ £100,000) × 100 = 40%

A 40% gross margin means that 40p of each £1 of revenue remains after direct costs, while 60p goes towards COGS.

Gross margin is useful for comparing products, services or periods. If one product line has a 25% gross margin and another has a 55% margin, the comparison can help you see which contributes more towards overhead and profit. The higher-margin product is not automatically the better choice, though: demand, sales volume and other costs also matter.

What is net profit?

Net profit is what remains after deducting all business expenses from revenue. Depending on how the accounts are prepared, expenses can include COGS, rent, utilities, marketing, salaries, insurance, loan interest, depreciation and tax.

Net Profit = Revenue − All Expenses

If revenue is £100,000 and total expenses, including COGS, are £85,000, net profit is £15,000.

Net profit gives a broader view of profitability: after accounting for the costs of running the business, how much did it earn? It is not the same as cash in the bank. Timing of customer payments, stock purchases, tax bills, capital spending and debt repayments can all affect cash flow separately.

What is profit margin?

Profit margin usually means net profit margin. It expresses net profit as a percentage of revenue and shows how much of each pound of sales remains as profit after expenses.

Profit Margin (%) = (Net Profit ÷ Revenue) × 100

Using the example above:

• Net profit: £15,000
• Revenue: £100,000
• Profit margin: (£15,000 ÷ £100,000) × 100 = 15%

A 15% profit margin means that 15p of each £1 of revenue remains as net profit after the expenses included in the calculation. When comparing figures, check that you are using the same definition of profit and the same accounting period.

Gross profit vs net profit: the key difference

The difference comes down to which costs are deducted:

• Gross profit subtracts direct costs associated with producing or delivering what you sell.
• Net profit subtracts all expenses, including direct costs and overheads, as well as finance costs and tax where applicable.

Gross profit helps you assess pricing and delivery efficiency. Net profit shows whether the business remains profitable after its wider operating costs are considered.

A business can have strong gross profit but weak net profit if overheads are too high. A business with a more modest gross profit may still earn a net profit if it keeps overheads proportionate and operates efficiently. Tracking both helps identify whether a problem sits in direct costs, pricing or overhead.

Gross margin vs profit margin: why both matter

Gross margin focuses on the direct economics of what you sell. It can help you review prices, compare product lines and spot waste or supplier costs that are eroding contribution.

Profit margin reflects the wider cost structure, including overheads. It helps you see whether revenue is translating into bottom-line profit and whether there is room for reinvestment.

If gross margin is healthy but profit margin is weak, review overheads and finance costs. If both margins are under pressure, investigate pricing, direct costs, sales mix and operational efficiency. The right explanation depends on your sector and accounts, so compare like with like and look for trends over time.

When a business applies for finance, a lender may consider its accounts and affordability, including profitability, cash flow, existing commitments and the proposed repayments. Our guide to business loan affordability explains other factors lenders may review. There is no single margin threshold that applies to every lender or industry.

How return on investment fits in

Return on investment (ROI) estimates the return generated by an investment compared with its cost. It can help you assess options such as equipment, a marketing campaign or expansion.

ROI (%) = ((Return from Investment − Cost of Investment) ÷ Cost of Investment) × 100

For example, if a £10,000 campaign generates £15,000 in additional net profit, its ROI is:

((£15,000 − £10,000) ÷ £10,000) × 100 = 50%

Be clear about what you count as the investment cost and the return, and use a time period that makes sense for the decision. Margins affect how much of additional sales becomes profit. Revenue growth without enough contribution can put pressure on cash flow, while a smaller increase in sales with better margins may produce a stronger return.

Practical steps to improve your margins

Improving margins does not always mean raising prices. UK SMEs can consider these steps:

1. Review pricing regularly. Check whether prices still reflect supplier, labour and delivery costs. Test changes carefully and monitor customer response.
2. Negotiate with suppliers. Better pricing, payment terms or volume discounts may reduce direct costs, as long as stock levels and cash requirements remain sensible.
3. Review product and service mix. Understand which offerings contribute most after direct costs, while also considering demand and the overhead each one requires.
4. Reduce waste and rework. In manufacturing and service delivery, errors and repeated work consume time and materials that could otherwise contribute to profit.
5. Control overheads. Review fixed costs such as software, utilities and administrative expenses. Small recurring savings can add up over a year.
6. Automate suitable tasks. Software or equipment may reduce repetitive work and improve consistency. Compare the full cost of implementation and maintenance with the expected savings.
7. Track results monthly. Use accounting reports or a simple dashboard to spot changes early. Review margins alongside cash flow, not in isolation.

How margins can affect business finance options

Lenders assess each application according to their own criteria. They may review profitability and cash flow to understand whether a business can meet repayments, including if sales or costs change. Depending on the application, they may look at:

• Gross margin and profit trends across recent accounting periods
• Cash flow and the timing of customer receipts and supplier payments
• Existing loans and other financial commitments
• The requested amount, purpose and proposed repayment schedule

Improving margins and keeping clear financial records can help explain your business's performance. It does not guarantee approval, a particular loan amount or a specific rate.

Finance may support a defined plan to improve efficiency or capacity. For example, equipment funding could help automate a process; working capital could support a larger order; or refinancing could reduce financing costs if the new terms are suitable. Explore the main business finance options and compare which type may fit your purpose. Before borrowing, model the likely effect on profit, cash flow and repayments. Make sure the expected benefit is realistic and arrives in time to meet the repayment schedule.

If you are considering funding, review the total amount repayable, fees, repayment frequency and any security or personal guarantee requirements. You can apply for business funding when you are ready to discuss your requirements.

Using finance to support ROI

Business finance can support an investment, but borrowing adds costs and repayment obligations. Consider the full impact before proceeding:

• Replacing higher-cost debt: Compare the total cost and terms of any refinancing, including fees and the effect of extending the repayment period.
• Investing in efficiency: Machinery, software or training may reduce waste or speed up delivery. Estimate the savings and additional costs over the useful life of the investment.
• Growing higher-contribution products: Additional capacity or targeted marketing may support sales, but account for acquisition costs, demand and working capital.
• Managing cash flow for a larger order: Funding may help cover the period between paying suppliers and receiving customer payment. Check that the expected margin justifies the cost and risk.

Before borrowing, ask whether the investment is likely to generate enough additional profit or cash flow to cover its costs and repayments, and what happens if it takes longer than expected. Use the business loan calculator to explore illustrative repayments and compare borrowing scenarios.

Final thoughts

Gross margin and profit margin show different parts of your business's financial performance. Gross margin focuses on direct costs; profit margin includes the wider expenses of running the business. Together with cash flow, they can help you price more carefully, identify cost pressures and assess growth plans.

For UK SMEs, understanding these figures can also make it easier to explain financial performance when exploring finance. Review your pricing, costs and product mix regularly, and consider borrowing only when the purpose and repayments fit a realistic plan.

Frequently asked questions

What is the main difference between gross margin and profit margin?

Gross margin is gross profit as a percentage of revenue after direct costs. Profit margin usually means net profit as a percentage of revenue after all business expenses included in the calculation.

Why is gross profit important for SMEs?

Gross profit shows how much remains from sales after direct costs. It can help businesses review pricing, product mix, production efficiency and supplier costs.

Can a business have high gross profit but low net profit?

Yes. High overheads, finance costs or other expenses can leave a business with low net profit even when its sales generate a healthy gross profit.

How do margins affect my chances of getting a business loan?

Lenders may consider profitability and its stability as part of assessing risk and affordability, alongside cash flow, existing commitments and other information. Their criteria vary, and strong margins do not guarantee approval.

What is a good profit margin for a UK SME?

There is no single good margin for every SME. Margins vary by sector, business model and accounting method. Compare your results with similar businesses where reliable benchmarks are available, and pay close attention to your own trend over time.

How can a business loan help improve my margins?

A loan may fund an investment that reduces costs or supports profitable growth, such as suitable equipment or working capital for a viable order. Compare the expected benefit with the full cost of finance and make sure repayments remain affordable.