Finance · 7 min read
How to calculate profit margins for your Shopify store
Plenty of stores make sales and still lose money, because the owner never worked out the true cost of each order. Understanding your profit margin is the difference between a business and an expensive hobby. It's simpler than it sounds — here's how to calculate it, what the numbers mean, and how to price with confidence.
The costs that eat your profit
To find real profit, you have to count every cost per order, not just what you paid for the product:
- Product cost — what you pay your supplier per unit.
- Shipping cost — what it costs to get the item to the customer (if you cover it).
- Transaction fees — the percentage payment processors take on each sale.
- Advertising cost per order — if you run ads, your ad spend divided by orders. This one quietly sinks many stores.
Miss any of these and your "profit" is a fantasy. The ad cost especially catches people out.
Run your numbers now
Enter your costs and see profit, margin, and break-even instantly.
The key formulas (in plain English)
You don't need to memorise these — our calculator does them for you — but understanding them helps you price smartly:
- Profit per sale = selling price − all costs. The actual money you keep from one order.
- Profit margin = profit ÷ selling price. Expressed as a percentage — how much of each sale you keep. A key health number.
- Markup = profit ÷ product cost. How much you've added on top of what you paid. Often confused with margin, but different.
- Break-even price = the total cost per order. Sell below this and you lose money on every order.
Margin vs markup — the common confusion
These get mixed up constantly. If you buy for $10 and sell for $20, your markup is 100% (you doubled the cost), but your margin is only 50% (half the selling price is profit). Both are useful; just know which you're talking about. Margin is usually the number that tells you whether the business is healthy.
What's a "good" margin?
It varies by product and model, so treat any benchmark loosely. The more useful question is whether your margin leaves enough room to cover the costs that don't show up per-order — returns, overhead, the occasional refund — and still leave profit. A margin that looks fine on paper can vanish once real-world messiness is included, so build in a cushion rather than pricing to the exact break-even.
Use it to price with confidence
Once you can see your numbers, pricing stops being a guess. Test different selling prices in the calculator and watch how margin and break-even move. That lets you set a price that's competitive and profitable — and quickly spot products that simply can't make money at a price customers will pay. Knowing that before you launch saves you from selling hard and earning nothing.
Revenue is vanity, profit is sanity. A store that tracks its margins from day one is a store built to last.
With your pricing sorted, keep going: choose a theme built to convert and research what's working for competitors.