How much do you really earn on every product you sell online? This e-commerce profit margin and markup calculator tells you precisely, because it accounts for what many forget: marketplace fees and shipping costs. From the product cost, selling price, fees and shipping, it calculates net profit per unit, net margin, markup on cost and the break-even price. Plus, it suggests the price to apply to reach the margin you want. It is the essential tool for anyone selling on Amazon, eBay, Etsy, Shopify or their own site.

What profit margin is

The profit margin is the percentage of the selling price you keep as profit after covering all costs. If you sell at €50 and spend €27.50 on product, shipping and fees, your profit is €22.50 and the net margin is 45%. It is the most important metric for any selling business: it is not how much you turn over that matters, but how much you keep. A healthy margin lets you reinvest in marketing, absorb surprises and grow; a thin margin makes you fragile to any cost increase.

Margin and markup: the difference that confuses everyone

It is the most common mistake in e-commerce. The margin is calculated on the selling price; the markup is calculated on the cost. If you buy at €25 and sell at €50, the markup is 100% (you double the cost), but the margin is only 50% (half the price is profit). Confusing them leads to wrong prices: someone who thinks they have a 100% margin by applying a 100% markup works at a loss as soon as they add fees and shipping. This calculator shows both, so you never get it wrong.

How the calculator works

Enter five values: the product cost, the selling price, the fees as a percentage, the shipping cost you bear and, optionally, the target margin. The calculator subtracts all costs (including fees calculated on the price) to give you real profit, margin and markup, the minimum price to avoid a loss and the suggested price to hit the margin you want. Change the values to test price and platform scenarios.

The values you need

The product cost is what you pay to buy or make it (COGS). The selling price is the one shown to the customer. The fees are the percentage withheld by the marketplace and payment system. The shipping cost is what you pay to deliver, if you do not charge it to the customer. The target margin is optional: it indicates the profit percentage you want, and the calculator will tell you what price to sell at.

Net profit per unit

The net profit per unit is what stays in your pocket for each item sold, after removing cost, shipping and fees. It is the most concrete number: multiplied by the units sold, it gives you the product's real profit. Beware: a positive unit profit is not enough if it is too small to cover the fixed costs (warehouse, software, advertising) spread across each sale. Use this figure as a basis to understand how many units you must sell to truly be in profit.

Net margin

The net margin is the unit profit divided by the selling price, as a percentage. It is the standard way to compare profitability across different products and channels, regardless of absolute price. A €10 product with a 30% margin can be more attractive than a €100 one with 5%. In e-commerce, after fees and shipping, a net margin of 20-30% is generally considered good; below 10% the business becomes risky.

Markup on cost

The markup expresses how much you mark up the cost to reach the price: profit divided by cost (product plus shipping). It is how many merchants think when setting prices ("a 150% markup"). A high markup does not guarantee a high margin if fees are heavy. Seeing markup and margin side by side helps you translate markup logic into real profitability, avoiding underpricing your products.

Marketplace fees

Selling on a platform has a cost that weighs heavily on margin. Here are the indicative fees of the main channels:

On your own site you only pay payment fees (2-3%), much less than a marketplace: this is why margins on the direct channel are higher, against a greater cost of acquiring traffic.

The shipping cost

Shipping is one of the most underestimated costs. If you offer "free shipping", you pay the cost and it must be subtracted from the margin: on a €50 product with €5 shipping, you are giving up 5 margin points. Always include it in the calculation, because it can turn an apparently profitable product into a break-even one. Many sellers include shipping in the price precisely to protect the margin and show "free shipping", which converts better.

The break-even price

The break-even price is the minimum price at which you can sell without losing: it covers exactly cost, shipping and fees, with zero profit. It is very useful to know how far you can discount in a promotion without going into the red. Note that, because of percentage fees, the break-even price is higher than the simple cost: if you sell at exact cost, the marketplace fee still sends you into a loss.

The suggested price for the target margin

By entering a target margin, the calculator works backwards: it tells you what price to sell at to obtain exactly that margin, accounting for cost, shipping and fees. It is the professional way to do pricing: you start from the margin you need to be sustainable and derive the price, instead of guessing a price and hoping. If the target margin is not achievable (fees make it impossible), the calculator flags it.

Gross, operating and net margin

There are different levels of margin. The gross margin considers only the product cost; this calculator's margin also includes shipping and fees, approaching the real contribution margin of each sale. Fixed costs (advertising, staff, warehouse, software) remain out: to reach the company net margin you will have to subtract those too. Use this tool for the profitability of a single product, the starting point of every analysis.

Typical e-commerce margins

Margins vary a lot by product category:

Electronics live on volume and thin margins; cosmetics and crafts have high margins but smaller volumes. Knowing your sector benchmark helps you understand whether your prices are competitive and sustainable.

How to increase the margin

You have several levers: raise the price (even a little, if the product can take it), reduce the cost by negotiating with suppliers or increasing purchase volumes, optimise shipping with more efficient carriers or packaging, and choose the right channel by moving best-sellers to your own site at lower fees. Even a few margin points, multiplied by volume, make a big difference to the final profit.

Markup and margin compared

To avoid confusion, here is the correspondence between markup and margin (without fees):

The higher the markup grows, the more the difference with margin shrinks proportionally. Always think in terms of margin when assessing profitability, and in terms of markup when setting the price from the cost.

Common mistakes

• Confusing markup and margin, setting prices too low.
• Forgetting marketplace fees in the profit calculation.
• Ignoring the cost of "free" shipping.
• Assessing profitability on revenue instead of margin.
• Discounting down to the product cost, ending at a loss because of fees.

How to use the calculator

Enter cost, price, your channel's fees and shipping to immediately see real profit, margin and markup. Add a target margin to get the suggested price. Try comparing two channels with different fees, or seeing how much you can discount before break-even. Using these numbers you build a solid price strategy, knowing exactly how much you earn on each sale.

Practical example

You sell a product that costs you €20, at €50, with 5% fees and €5 of shipping you bear, aiming for a 40% margin. The result: a net profit of €22.50 per unit, a net margin of 45%, a markup of 90%, a break-even price of €26.32 and a suggested price of €45.45 for the 40% target margin, with a high-margin verdict. Enter your numbers for your real products.

Updated July 2026