How to Use the Profit Percentage Formula to Boost Profits

As an eCommerce business owner in 2025, you may see stacks of orders coming in and shipments going out the door without much visibility into what that actually means for your bottom line or your net profit.

In today’s fast-paced ecommerce environment, it can be challenging to track performance metrics—like your net profit margin or gross profit margin—when you’re in the thick of your busy season.

Thankfully there are a couple of handy business calculations that you can use to ensure you’re on track, namely the profit percentage formula.

In this blog post, we’ll walk you through the profit percentage formula and give you some examples of how to apply it to your business. By the end, you’ll have a clear understanding of how to measure your company’s success!

What is the profit percentage formula?

The Profit Percentage Formula is a simple way to calculate how much profit you’re making on each sale—sometimes referred to as your profit selling price. It’s important to understand various margins (including net profit margin and gross profit margin) so you can price products using a solid profit formula and continue to grow your business.

Profit percentage = (Sale price – Cost of goods) / Sale price

In the above profit formula, the sale price—sometimes called the selling price formula—is whatever the cost is for a consumer to purchase a good or service. It’s essentially the final retail price. This differs from a product’s total cost (or cost price), which is the production cost before any markup or margin is added.

Let’s say you’re selling a widget for $10, and it costs you $5 to make. Your profit percentage would be:

Profit percentage = ($10 – $5) / $10

Profit percentage = 50%

So, for every widget you sell, you’re making a 50% profit.

Now, let’s say you want to increase your overall profit margin (which could include net profit margin or gross profit margin). You could do this by either increasing the sale price or decreasing the cost of goods sold—both are key levers in any pricing strategy. So for instance, with the widget, you increase the sale price to $12. Your new profit percentage would be:

Profit percentage = ($12 – $5) / $12

Profit percentage = 58.3%

So, by increasing the sale price by $2, you’ve increased your profit margin by 8.3%. Not bad!

Now let’s say you want to decrease your cost of goods. You could do this by finding a cheaper supplier or by making more efficient processes. Let’s say you’re able to decrease your cost of goods to $4. Your new profit percentage would be:

Profit percentage = ($10 – $4) / $10

Profit percentage = 60%

So, by decreasing your cost of goods by $1, you’ve increased your profit margin by 10%.

As you can see, the Profit Percentage Formula is a simple way to calculate your profit margins. While it shows you how you are doing today, it also shows how changing either the sale price or the cost of goods can have an impact on your profit percentage.

What is profit margin?

Profit margin is a measure of how much actual profit a company makes on each sale. Also known as net profit margin, it is calculated by dividing net income by revenue (or net sales), making it an essential profit margin formula for any ecommerce seller. Net income is the total amount of money a company has earned after all expenses have been paid. Revenue is the total amount of money that a company has earned from sales.

Net profit margin is important because it measures how efficiently a company converts sales revenue into profit. It’s a useful comparison tool across different businesses, revealing which ones manage costs, interest expense, and total expenses more effectively.

A profit margin is an example of a margin, which is not the same as a product markup which is a different type of calculation. See the difference between markup vs. margin in our related blog post.

Let’s look at an example. Let’s say that Company A has a net income of $100,000 and revenue of $1,000,000. Company B has a net income of $50,000 and revenue of $500,000. Company A’s profit margin is 10%, and company B’s profit margin is 10%.

This means that company A makes $10 in profit for each $100 of sales while company B only makes $5 in profit for each $100 of sales. Company A is more efficient at making money than company B.

There are a few things to keep in mind when looking at your profit margin.

• Higher profit margins are not always better: A company with a high-profit margin may be doing well now, but it might not be able to sustain that level of profitability in the future.
• Profit margin varies by industry: Some industries have higher profit margins than others. For example, the profit margin for companies in the tech industry is typically higher than that for retail companies.
• Profit margin can be affected by one-time items: For example, a company might sell a piece of property for a one-time purchase. This would increase the company’s profit margin for that year, but it is not something that would happen every year.
• Profit margin is just one metric to look at when evaluating a company: It should be considered along with other metrics such as revenue growth, operating expenses, and cash flow.
• Profit margin is a measure of how much profit a company makes on each sale: It’s not the same as net income or revenue.

Net income is the total amount of money that a company has earned after all expenses have been paid. Revenue is the total amount of money that a company has earned from sales. Your profit margin is the percentage of net income that your company keeps as profit.

Using profit margin

Profit margin is a good way to compare different companies and see which ones are more efficient at making money. However, it is just one metric to look at when evaluating your business. It should be considered along with other metrics such as revenue growth, operating expenses, and cash flow.

Related: Calculating Sales Margin with Real-World Examples

What is gross profit percentage?

Gross profit percentage is a key metric for eCommerce businesses and closely relates to your gross profit margin. It tells you what percentage of your sales revenue remains after accounting for the cost of goods sold, which is critical for understanding margin percentage and operating income.

The importance of understanding gross profit percentage

This metric is important because it allows you to see how much profit you are making on each sale and can help you make decisions about pricing, inventory, and other aspects of your business.

How to calculate gross profit percentage

To calculate gross profit percentage, you will need to know two things:

• Gross profit
• Total revenue

Your gross profit is the difference between your total revenue and the cost of goods sold. To calculate this, you will need to know the cost of each item you sell and the number of items you sold.

Your total revenue is the total amount of money you make from sales. To calculate this, you will need to know the price of each item you sold and the number of items you sold.

Once you have these two numbers, you can calculate your gross profit percentage by dividing your gross profit by your total revenue.

For example, let’s say you sold 100 dongles at a price of $10 each. The cost of each item was $5, so your gross profit would be $500 (100 dongles x $5 gross profit per item). Your total revenue would be $1,000 (100 items x $10 price per dongle). This means that your gross profit percentage would be 50% ($500/$1,000).

This example shows why gross profit percentage is such an important metric for eCommerce businesses. It provides a clear picture of how much profit you are making on each sale and can help you make decisions about pricing, inventory, and other aspects of your business.

If you are not sure how to calculate gross profit percentage, there are many online calculators that can help. Just search for the “gross profit percentage calculator,” and you will find several options.

Final thoughts

The Profit Percentage Formula remains a valuable tool in 2025 for business owners and managers to calculate how much profit they’re making on each product or service. Alongside this, monitoring net profit margin, gross profit margin, operating profit margin, and even the loss percentage formula can guide better financial modeling and ensure long-term profitability.

By understanding the components of these formulas and using accurate data from your income statement, you can make informed decisions about pricing, production, and forecasting to maintain a healthy net profit margin.

Staying profitable in ecommerce isn’t just about knowing your numbers — it’s about acting on them. With Linnworks, you get real-time visibility into orders, inventory, and margins across every channel you sell on. So instead of guessing your profit percentage, you can grow it — confidently and at scale. Ready to take control of your operations and bottom line? Book a demo and see how Linnworks puts your entire business in sync.