Net profit margin
Learn what net profit margin is, how to calculate it, and what a healthy margin looks like for your business.
Published Wednesday 30 September 2026
Table of contents
Net profit margin is the portion of income you get to keep
Key takeaways
- Net profit margin is the percentage of revenue you keep as profit after all expenses, including interest and tax
- You calculate it by dividing net profit by revenue and multiplying the result by 100
- A good margin depends on your industry, so compare yourself with peers and track your own trend
- Pair it with gross and operating margins and a cash flow forecast for a fuller view of your finances
What is net profit margin?
Net profit margin is the percentage of revenue left as profit after all expenses, including cost of goods sold (COGS), operating expenses, interest and taxes. If your business earns S$500,000 in revenue with a 10% net profit margin, you keep S$50,000 as profit.
It’s one of the clearest signs of your business’s financial health, because it shows how much of each dollar you earn stays with you. You’ll find the figures you need on your profit and loss statement (also called an income statement).
Net profit margin formula
The net profit margin formula divides your net profit by your revenue and turns the result into a percentage. It’s the most complete type of profit margin, because it accounts for every cost.
Net profit margin = (net profit ÷ revenue) × 100
To find net profit, subtract each type of cost from your revenue:
Net profit = revenue − COGS − operating expenses − interest − taxes
In this formula:
- revenue is the total amount you earn from sales before any costs come out
- net profit is what’s left after you pay for stock, overheads, interest and tax
Net profit is often called your “bottom line”, because it sits on the last line of your profit and loss statement.
How to calculate net profit margin
You can work out your net profit margin in four steps using figures you already have. If you’d like more practice, there’s a step-by-step calculation guide with extra examples.
- Find your total revenue for the period
- Add up all your expenses, including COGS, operating expenses, interest and tax
- Subtract total expenses from revenue to get your net profit
- Divide net profit by revenue and multiply by 100
Net profit margin example for a Singapore bakery
Sweet Flour, a fictional bakery in Singapore, wants to check its net profit margin for one quarter. Its books show S$120,000 in revenue and these expenses:
- S$40,000 in COGS for ingredients and packaging
- S$50,000 in operating expenses, covering rent, utilities, wages and marketing
- S$2,000 in loan interest
- S$7,000 in tax
Total expenses come to S$99,000, which leaves a net profit of S$21,000. Divide S$21,000 by S$120,000 to get 0.175, then multiply by 100 for a net profit margin of 17.5%.
That means Sweet Flour keeps 17.5 cents of every S$1 it earns. To skip the maths, plug your own numbers into the free net profit margin calculator.
Why net profit margin matters
Of all the ways to measure profitability, net profit margin shows whether your business model works once every cost is paid. Because it’s a percentage, you can track it over time and use it to guide everyday decisions.
Tracking your margin helps you:
- set prices that cover all your costs and still leave a profit
- spot cost creep, when revenue rises but your margin falls because expenses are growing faster
- compare your results with businesses of different sizes, since a percentage evens out differences in revenue
- prepare for funding, as lenders and investors review your margins when you apply for a loan or investment
What is a good net profit margin?
A good net profit margin depends on your industry. As a starting point, Brex’s rule of thumb treats 5% as low, 10% as healthy and 20% as high.
Industries with high overheads tend to run on thinner margins. NYU Stern’s January 2026 margins-by-sector data for US listed companies puts average net margins at:
- 1.32% for grocery and food retail
- 5.61% for general retail
- 9.37% for restaurants and dining
- 25.49% for system and application software
- 9.74% across the total market
These figures come from large US listed companies, so Singapore small-business margins may differ. Compare your margin with peers in your industry and track your own trend over time.
So is 7% good? It sits between Brex’s low and healthy marks. It beats the NYU Stern averages for grocery and general retail, though it’s low for software. A 30% margin is high by most measures, beating even the 25.49% software average.
Net profit margin vs gross and operating profit margin
Gross, operating and net profit margin each measure profit at a different point on your income statement. Each one takes out more costs than the last.
Here’s how each margin works:
- Gross profit margin is (revenue − COGS) ÷ revenue × 100, showing what’s left after direct costs
- Operating profit margin is operating profit ÷ revenue × 100, where operating profit is gross profit minus operating expenses, before interest and tax
- Net profit margin is net profit ÷ revenue × 100, after every expense, including interest and tax
Say your business earns S$200,000 in revenue with S$80,000 in COGS. Your gross profit is S$120,000, a gross margin of 60%. If operating expenses, interest and taxes total S$90,000, your net profit is S$30,000, a net margin of 15%.
A high gross margin with a low net margin usually points to heavy overheads, such as rent, staffing, marketing or loan repayments. In that case, your products are likely priced well, and the biggest savings sit in your running costs.
Factors that affect net profit margin
Your net profit margin moves whenever revenue or any cost shifts. Knowing which levers drive it helps you respond quickly.
Revenue changes
Higher sales can lift your margin when costs stay steady. A quieter month spreads the same fixed costs over less revenue, so your margin dips.
Cost of goods sold
Rising prices for materials, stock or direct labour reduce the profit on every sale. Adjusting your prices or sourcing keeps that margin intact.
Operating expenses
Rent, wages, utilities and subscriptions add up, and they often stay fixed even when sales slow. Keeping them in line with revenue protects your bottom line.
Pricing
Your pricing strategy sets how much profit each sale carries. Heavy discounting can grow revenue while shrinking your margin.
Tax and interest
Loan interest reduces net profit, so higher borrowing costs lower your margin. Singapore companies pay a flat 17% corporate income tax rate on chargeable income, which comes out before you reach your bottom line.
Industry dynamics
Competition and typical cost structures shape what margins are realistic in your sector. That’s why a café and a software firm can both be healthy on very different margins.
How to improve your net profit margin
You can lift your net profit margin by earning more from each sale, spending less to deliver it, or both. These moves also support wider efforts to increase your profits:
- review your prices regularly so they keep pace with your costs
- audit your business costs and cut subscriptions or services you rarely use
- raise your average sale value with bundles, upsells or add-on services
- negotiate better terms or bulk discounts with your suppliers
- automate admin like invoicing and bank reconciliation with accounting software
- check your profit and loss statement monthly to catch margin changes early
- retain customers with follow-ups and loyalty offers to build repeat sales
Limitations of net profit margin
Net profit margin is a useful snapshot, and it reads best with some context. Keep these limits in mind when you review it:
- one-off items, such as selling equipment or a large legal bill, can push the margin up or down for a single period
- differences in financing and tax make it tricky to compare businesses with different loan levels or tax positions
- seasonal businesses can show very different margins from one quarter to the next
- profit is different from cash, so a profitable business can still run short of money to pay bills
To see the whole story, pair net profit margin with a cash flow forecast and other profitability ratios, like return on assets.
Track your net profit margin with Xero
Xero’s real-time reports show your revenue, expenses and margins in one place, so you can spot changes and act early. You’ll see where your profit goes each month with less manual work. Choose a plan and get one month free to start tracking your bottom line.
FAQs on net profit margin
Here are quick answers to common questions about net profit margin.
Can net profit margin be negative?
Yes, a negative margin means your expenses were higher than your revenue for the period. It can happen when a new business spends ahead of sales, and tracking the trend shows whether you’re heading towards profit.
Why would a business have a strong gross profit but a low net profit margin?
Costs below the gross profit line, like rent, salaries or loan interest, are usually high relative to sales. Growing revenue without adding fixed costs is often the quickest way to close the gap.
How often should you check your net profit margin?
Check it at least monthly, then compare each quarter with the same quarter last year. That comparison allows for seasonal swings and shows your true direction.
Should you use pre-tax or after-tax net profit?
Net profit margin uses after-tax profit, so it shows what you really keep. A pre-tax margin is handy when you compare businesses with different tax positions, since it takes tax out of the equation.
Can a business with a healthy net profit margin still run short of cash?
Yes, because you record profit when you invoice, while customers on credit terms may pay weeks later. Loan principal repayments and stock purchases also use cash without reducing profit straight away.
Related terms
Learn more about net profit margin
Handy resources
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Margin calculator
Calculate your gross profit margin with this simple calculator to check you’re hitting your targets.
Financial reporting
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Disclaimer
This glossary is for small business owners. The definitions are written with their requirements in mind. More detailed definitions can be found in accounting textbooks or from an accounting professional. Xero does not provide accounting, tax, business or legal advice.