Profitability ratios: types, formulas and business uses

Published Monday 30 March 2026

Table of contents

• What do profitability ratios measure?
• Types of profitability ratios
• Profitability ratio meanings and formulae
• Gross profit margin
• Operating profit margin
• Net profit margin
• Return on assets
• Return on invested capital
• How to improve your profitability ratios
• Using profitability ratios in your business
• FAQs on profitability ratios

Key takeaways

• Calculate your gross profit margin and net profit margin monthly or quarterly to spot trends early and identify whether your pricing and cost structure can sustain your business operations.
• Focus on margin ratios like gross and net profit margins if you're an early-stage business, then add return ratios like ROA and ROIC when you start making significant investments in assets or growth.
• Compare your profitability ratios to industry benchmarks to understand how your business performs relative to competitors and identify areas for improvement.
• Use declining ratios as action triggers to negotiate better supplier terms, adjust pricing, cut unnecessary expenses, or evaluate whether your assets are generating adequate revenue.

What do profitability ratios measure?

Profitability ratios measure how efficiently your business turns spending into profit. They help you see whether your pricing, costs, and investments are working together to grow your bottom line.

Different types of ratios focus on different types of spending, and not all of them will be relevant to every small business.

Types of profitability ratios

Profitability ratios fall into two main categories: margin ratios and return ratios. Each focuses on a different type of spending.

Margin ratios

Margin ratios show what percentage of revenue your business keeps after covering costs. They focus on day-to-day spending and help you understand how efficiently you turn sales into profit.

The main margin ratios small businesses use are:

• gross profit margin
• operating profit margin
• net profit margin

Return ratios

Return ratios measure how well your business generates profit from major investments like equipment, property, or intellectual property. They're most useful when you're in growth mode and need to evaluate whether big spending decisions are paying off.

The two main return ratios are:

• return on assets (ROA)
• return on invested capital (ROIC)

Profitability ratio meanings and formulae

Here's how to calculate and interpret the most important profitability ratios for your small business.

Gross profit margin

Gross profit margin shows what percentage of revenue remains after paying for the products or services you sell. This is also called your cost of goods sold (COGS).

Your gross margin needs to be large enough to cover general expenses like rent, utilities, marketing, insurance, and staff costs. What's left after those expenses becomes your net profit.

Why it matters

A higher gross margin gives you more flexibility to cover operating costs and still earn a profit. Monitoring this ratio helps you:

• Spot sustainability threats: Catch rising costs or pricing problems early
• Find improvement opportunities: Identify where you can negotiate better supplier terms or adjust pricing

* Net profit can be quoted before or after taxes. If quoting after-tax net profit then you need to also subtract taxes.

Formula for calculating gross profit margin

Gross profit margin = (Gross profit ÷ Revenue) × 100

Where gross profit = Revenue – Cost of goods sold

Learn more in our guide How to measure profitability.

Get tips to improve these ratios in our guide How to increase profit.

Operating profit margin

* We use value of assets rather than 'average value of assets' because the latter is for businesses that are buying and selling assets all the time... which doesn't reflect a small business.

Operating profit margin shows what percentage of revenue remains after covering both your cost of goods sold and operating expenses like rent, salaries, and marketing. Unlike net profit margin, it excludes interest and taxes, giving you a clearer view of core business performance.

Why it matters

Operating profit margin reveals how efficiently you run day-to-day operations without the noise of financing costs or tax impacts. This makes it useful for:

• Comparing your business to competitors: Financing structures won't skew the comparison, but be aware that calculation methods can differ. An IASB study found that companies used at least nine different ways to calculate operating profit, making a true like-for-like comparison difficult without a standardised approach.
• Tracking operational improvements: See whether cost-cutting or efficiency gains are working

Formula for calculating operating profit margin

Operating profit margin = (Operating profit ÷ Revenue) × 100

Where operating profit = Revenue – Cost of goods sold – Operating expenses

Net profit margin

Net profit margin shows what percentage of revenue remains after paying all expenses, including operating costs, interest, and taxes. This is the portion of each sale you actually keep in the business.

You can pay this profit to owners or reinvest it in growth.

Why it matters

A higher net profit margin means you're efficient at turning sales into profits. Strong margins reduce your reliance on high sales volume, which helps small businesses that can't compete on scale.

Finding the right margin involves trade-offs:

• Lower prices: May increase sales volume and total profit
• Increase marketing spend: May bring in more customers
• Invest in staff: May improve efficiency and customer experience

* You can quote net profit before or after taxes. If you quote after-tax net profit, you also need to subtract taxes.

Formula for calculating net profit margin

Net profit margin = (Net profit ÷ Revenue) × 100

Learn more in our guide How to measure profitability.

Get tips to improve these ratios in our guide How to increase profit.

Return on assets

Return on assets (ROA) measures how efficiently your business generates profit from everything it owns, including property, equipment, and intellectual property.

This ratio is most relevant if you've invested heavily in expensive assets. For service businesses with few physical assets, ROA may be less meaningful.

Why it matters

ROA helps you evaluate whether your asset investments are paying off:

• High ROA: You're getting good value from your assets
• Low ROA: You may have overinvested in equipment, property, or other assets that aren't generating enough revenue

* This formula uses value of assets rather than 'average value of assets' because the latter applies to businesses that buy and sell assets frequently, which doesn't reflect most small businesses.

Formula for calculating return on assets

Return on assets = (Net profit ÷ Total assets) × 100

Return on invested capital

Return on invested capital (ROIC) measures how effectively your business generates profit from new capital investments. While ROA looks at all assets, ROIC focuses specifically on money you've actively invested in growth.

This ratio is most useful if you're spending significantly on property, equipment, intellectual property, or research and development.

Why it matters

ROIC reveals whether your capital investments are generating adequate returns. A low ROIC may signal that you've spent money on assets or projects that aren't contributing enough to profitability, helping you avoid similar mistakes in future investment decisions.

Formula for calculating return on invested capital

Return on invested capital = (Net operating profit after tax ÷ Invested capital) × 100

How to improve your profitability ratios

Understanding your ratios is the first step. Here's how to use them to strengthen your business performance.

Track your ratios regularly

Calculate your key profitability ratios monthly or quarterly to spot trends early. Regular tracking helps you identify problems before they become serious and shows which strategies are working.

Benchmark against your industry

Compare your ratios to industry averages to see how you stack up. Your accountant or bookkeeper can help you find relevant benchmarks for your specific business type and size.

Focus on the right ratios for your stage

• Early-stage businesses: Prioritise margin ratios (gross and net profit margins) to ensure operational sustainability
• Growth-stage businesses: Add return ratios (ROA and ROIC) when evaluating expansion decisions and major investments

Take action on the insights

Use your ratios to guide specific decisions:

• Declining gross margin: Negotiate better supplier terms or adjust pricing
• Low net margin: Cut unnecessary expenses or invest in efficiency improvements
• Poor ROA: Evaluate whether assets are generating adequate revenue

Using profitability ratios in your business

Profitability ratios help you measure how efficiently your business turns costs and investments into profit. Here's how to put them to work:

• Track margin ratios first: Gross and net profit margins are essential for day-to-day sustainability
• Set benchmarks: Establish ratios you want to maintain
• Define goals: Identify ratios you want to improve over time
• Add return ratios as you grow: Return on assets and return on invested capital become more relevant when you're making bigger investments

Work with your accountant or bookkeeper to determine which ratios matter most for your business. They can run the calculations and share reports through software like Xero. Get one month free and start measuring what matters.

FAQs on profitability ratios

Here are answers to common questions about profitability ratios for small businesses.

What's a good profitability ratio for my business?

A 'good' ratio varies by industry and business stage. Generally, a net profit margin above 10% is solid for small businesses, while gross profit margins typically range from 25% to 50% depending on your industry. Compare your ratios to industry benchmarks and track trends over time.

How often should I calculate profitability ratios?

Calculate your key profitability ratios monthly or quarterly. Regular tracking helps you spot trends, identify problems early, and make informed decisions about pricing, spending, and investments.

Which profitability ratio is most important?

For most small businesses, net profit margin is the most important because it shows your true bottom line after all expenses. However, gross profit margin is also critical as it reveals whether your core business model is sustainable.

Can profitability ratios predict cash flow problems?

Profitability ratios show how efficiently you generate profit, but they don't directly measure cash flow. You can be profitable on paper but still face cash shortages if customers pay slowly or you tie up money in inventory. Use profitability ratios alongside cash flow statements for a complete financial picture.