How much of your monthly revenue do you actually keep?
Build a simple income statement from revenue through goods, logistics and marketing all the way to operating and net profit.
- Result without an email
- Tax and tax-free modes
- CZK, EUR and USD
- Cost of goods−55.4 %
- Logistics−7.7 %
- Marketing−18.2 %
- Operations−10.4 %
- Left over8.3 %
From revenue down, floor by floor.
Fill in what you know. The calculator names the result after the level it stands on — net profit only once every layer is included.
Enter the figures exactly as your books show them — all on the same basis. Tax isn't converted here.
Enter your numbers on the left.
The result appears as soon as you fill the first field. Nothing is sent anywhere — the maths runs in your browser.
Same order. Completely different picture.
An ordinary calculator stops at the difference between selling and purchase price. Here we go further — to the amount you can actually spend on running and growing the business.
Gross margin
- Net revenueCan't be calculated
- Cost of goodsCan't be calculated
- Gross profitCan't be calculated
Contribution after costs
- Gross profitCan't be calculated
- Fulfilment and feesCan't be calculated
- MarketingCan't be calculated
- Operating costsCan't be calculated
- Operating result before depreciation, interest and taxCan't be calculated
Fill in the calculator above and both cards recalculate on your numbers.
How do you calculate a store's net margin?
A store's income statement has more floors than it looks. Each answers a different question: gross profit tells you whether you buy well; contribution after logistics whether you can deliver; and only after depreciation, interest and tax do you get a number you're allowed to call net profit.
What does a worked example look like?
Sales of 1,000,000, discounts of 50,000, refunds of 30,000 and shipping income of 20,000 give net revenue of 940,000. After cost of goods of 400,000 the gross profit is 540,000; after logistics of 120,000, marketing of 150,000 and operations of 180,000, 90,000 remains. After depreciation of 10,000, interest of 5,000 and tax of 15,000 the net profit is 60,000 — a net margin of 6.4%.
How does tax enter the calculation?
Before anything is added up, every amount is converted to one economic basis. If you're registered for tax, output tax comes off revenue and input tax comes off costs, because you can reclaim it. The payment fee isn't converted — financial services are exempt, so there's nothing to reclaim. The country preset is only a suggestion; what you set is what counts.
- Net revenue
- sales − discounts − refunds + shipping + other income
- Gross profit
- net revenue − cost of goods
- After logistics
- gross profit − fulfilment and fees
- After marketing
- after logistics − marketing
- Operating result
- after marketing − operating costs excl. depreciation
- Pre-tax profit
- operating result − depreciation − interest
- Net profit
- pre-tax profit − income tax
Counting a return twice
The refunded amount reduces revenue. Return shipping and the work involved are an extra cost. Put both in one field and the result looks worse than it is.
Advertising folded into the margin
You can't derive a break-even point from a margin that already has advertising deducted — it's circular and the number means nothing. That's why we start from the contribution before advertising.
Mixing prices with and without tax
Revenue including tax minus a purchase price excluding tax gives you a margin that doesn't exist anywhere. So the calculator converts everything to one basis first.
You might recognise one of these.
Hundreds of thousands flow through in a month and almost nothing is left.
Build the statement layer by layer and see which one eats the profit.
Your accountant reports quarterly; you need to know sooner than that.
Enter the figures you already have and see operating and net profit right away.
You don't know whether you can afford another hire or a bigger budget.
See how much room you actually have once every cost is in.
You worked out one order. Margly does it for all of them.
That's one month, built by hand. Margly runs the same cascade continuously from real orders and costs.
- 1Pick your platformShoptet, Upgates, Shopify or WooCommerce.
- 2Let it load real dataOrders, products and purchase prices come in on their own.
- 3Fix the biggest impact firstA specific opportunity, an amount and a recommended step.
14 days free · no card required · data in the EU
- Do todayMove budget out of three campaigns below break-even.Sample
- ProductsRaise visibility of a product with above-average margin.Sample
- ShippingA carrier whose shipping balance doesn't add up.Sample
Frequently asked questions
Do I have to sign up to see the result?
What if I don't have purchase prices?
When may a result be called net profit?
Why don't you work out income tax yourselves?
More tools
Profit margin calculator
Go from basic margin and markup to profit after fulfilment, fees, returns and advertising. Calculate one order manually — then let Margly run the same logic across your entire store.
Open tool →Break-even ROAS calculator
It depends on your purchase price, shipping, fees, returns and on the value you send to the ad platform. Work out your own break-even point.
Open tool →Product profitability
Some products drive turnover but leave almost nothing after discounts, logistics, returns and advertising. Margly finds them automatically.
Open tool →Let Margly calculate your whole store.
Orders, products, purchase prices, advertising and operating costs in one view. On your data, not on a generic benchmark.
Automate my store's income statement14 days free · no card required · data in the EU