Profit margin: meaning, types, and how to calculate it

Profit margin helps you understand how much money your business actually keeps after costs. It’s one of the simplest ways to measure profitability and can help you make better decisions about pricing, costs, and growth.

We’ll explain what profit margin is, why it matters, the different types of profit margins, and how to calculate them.

Key takeaways:

• Profit margin measures how much profit your business keeps from revenue.
• Different profit margins give different views of business performance.
• Gross, operating, pretax, and net profit margins all measure profitability at different stages.
• Improving profit margins often means increasing efficiency, controlling costs, or adjusting pricing.
• Tracking profit margin over time helps businesses make more informed decisions.

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What is a profit margin?

Profit margin is a measure of how much profit your business keeps after costs. It’s shown as a percentage and tells you how much of each pound earned becomes profit.

For example, if your business generates £10,000 in revenue and keeps £2,000 after costs, your profit margin is 20%.

Profit margin is useful because it focuses on efficiency rather than size.

A business with lower revenue can sometimes be more profitable than a business generating much higher sales – if it keeps a larger percentage as profit.

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Why do profit margins matter?

Profit margins help you understand whether your business model is sustainable. Revenue shows how much money comes in – and profit margin shows how effectively your business turns that revenue into profit.

Understanding profit margins can help you:

• Evaluate business performance
• Set pricing more confidently
• Identify rising costs
• Improve profitability
• Compare performance over time
• Make better growth decisions

For small businesses especially, even small improvements in margin can make a noticeable difference.

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Types of profit margins

Not all profit margins measure the same thing. Each type looks at profitability from a slightly different perspective.

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Gross profit margin

Gross profit margin measures how much revenue remains after subtracting the direct costs of delivering your products or services. This is often linked to inventory costs, materials, and production costs.

Formula:

Gross Profit ÷ Revenue × 100

Gross margin is useful for understanding whether your pricing and direct costs are sustainable.

If you'd like to understand product costs in more detail, check out our guide to cost of goods sold (COGS).

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Net profit margin

Net profit margin is often considered the broadest profitability measure. It shows how much revenue remains after all business costs are deducted.

That includes:

• Direct costs
• Operating expenses
• Interest
• Taxes

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Formula:

Net Profit ÷ Revenue × 100

This is usually the figure people mean when they talk generally about ‘profit margin.’

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Operating profit margin

Operating profit margin looks beyond direct costs and gives a clearer picture of how efficiently the business runs overall.

It includes day-to-day operating expenses such as:

• Rent
• Staff costs
• Utilities
• Software
• General operating expenses

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Formula:

Operating Profit ÷ Revenue × 100

Want to learn more? Check out our guide to operating profit.

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Pretax profit margin

Pretax profit margin measures profitability before taxes are deducted.

Formula:

Profit Before Tax ÷ Revenue × 100

Pretax margin focuses on operational performance before taxation is applied. Tax obligations may vary, so this can be useful when comparing businesses.

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How to calculate profit margin

The standard profit margin formula is:

Profit ÷ Revenue × 100

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For example:

• Revenue = £20,000
• Profit = £4,000

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Calculation:

£4,000 ÷ £20,000 × 100

Profit margin = 20%

This means the business keeps 20p of profit for every £1 earned.

Different profit margin types simply change which profit figure you use in the formula.

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Profit margin example

Imagine a small retail business.

• Monthly revenue: £30,000
• Direct product costs: £18,000
• Operating expenses: £7,000
• Profit: £5,000

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Calculation:

£5,000 ÷ £30,000 × 100

Net profit margin = 16.7%

This means the business keeps around 17p of profit for every £1 of sales.

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What is a good profit margin?

A good profit margin depends heavily on your industry, business model, and cost structure, so there isn’t one universal answer to this question.

For example:

• Restaurants and hospitality businesses often operate on tighter margins.
• Retail businesses may vary depending on inventory and pricing.
• Service businesses sometimes achieve higher margins because they carry lower product costs.

Rather than comparing yourself to a single benchmark, it’s often more useful to track whether your own margins are improving over time.

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Questions to ask include:

• Are margins becoming healthier?
• Are costs increasing faster than sales?
• Is pricing still sustainable?
• Are operational changes improving profitability?

Consistency and improvement are usually more valuable than chasing a specific percentage.

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How reporting can help improve profit margins

Understanding profit margins starts with accurate sales and cost visibility. However, many small businesses still rely on spreadsheets or manual reporting, which can make it harder to spot trends.

With good reporting tools, businesses can:

• Track sales performance
• Monitor busy periods
• Understand product performance
• Identify opportunities to improve profitability

Clearer reporting makes it easier to move from reacting to making informed decisions.

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Common questions about profit margins

What is a profit margin?

Profit margin measures how much profit a business keeps from revenue.

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What’s the difference between profit and profit margin?

Profit is the amount earned after costs. Profit margin expresses that amount as a percentage of revenue.

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How do you calculate profit margin?

The formula for calculating profit margin is: Profit ÷ Revenue × 100

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What is a good profit margin?

It depends on industry, pricing, and operating costs. Tracking improvement over time is often more useful than targeting a single benchmark.

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Which profit margin is most important?

Each serves a different purpose, but net profit margin often gives the broadest view of overall profitability.

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A simpler way to keep up with business performance

Revenue tells you how much money comes in. Profit margin helps you understand what stays.

When you have visibility into sales and performance, it becomes easier to make decisions that support long-term profitability.

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