Margin and markup
Calculate unit profit, gross profit margin (%) and markup (%) from unit cost and selling price.
Open calculatorE-commerce & Marketplace Profit Margin Calculator
Analyze true unit economics for online retail across Allegro, Amazon, and self-hosted stores (WooCommerce, Shopify). Accounts for purchase cost, VAT, category referral commissions, payment processing fees, packaging, shipping subsidies, and income tax.
Net take-home profit per unit
30.42 USDActual net margin: 29.0%
Actual net margin
29.0%
Actual operational markup
40.9%
Break-even selling price
86.07 USD
Total monthly net profit
3,042.17 USD
Total monthly gross revenue
12,900.00 USD
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Product cost (net)
50.00 USD (38.8%)Marketplace commission
10.32 USD (8%)Payments and logistics
10.99 USD (8.5%)Taxes (VAT + income tax)
27.27 USD (21.1%)Net profit
30.42 USD (23.6%)Gross selling price (100%)129.00 USD
Sales channel profitability comparison
Allegro
30.42 USD
Actual net margin:29.0%
Commission / gateway:10.32 USD
Amazon
34.29 USD
Actual net margin:32.7%
Commission / gateway:6.45 USD
Own store (WooCommerce / Shopify)
★ Best
38.78 USD
Actual net margin:37.0%
Commission / gateway:1.96 USD
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Frequently asked questions
Why is simple markup between purchase and selling price misleading in e-commerce?
In online retail, gross markup must cover marketplace referral fees (often charged on the gross VAT-inclusive price), payment gateway fees, packaging materials, shipping subsidies, VAT, and income tax. Only what remains after all transaction deductions is true net profit.
What is the difference between actual net margin and operational markup?
Net margin expresses your take-home profit as a percentage of the customer selling price. Operational markup expresses that same net profit as a percentage of total unit costs (goods, marketplace commission, payment processing, logistics, and income tax).
What does the break-even selling price tell me?
The break-even price is the exact minimum selling price at which net profit per unit equals zero after all variable fees, shipping costs, and taxes. Selling below the break-even price means every order loses money.
How does selling on an own store compare with Allegro or Amazon?
A self-hosted store (WooCommerce, Shopify) charges 0% marketplace referral commission, leaving only payment gateway fees (typically 1.1%–1.5% plus a small fixed fee). That extra margin per unit can then be allocated toward customer acquisition and ads.
Can I override the preset category commission rate?
Yes. Selecting a platform and category loads the schedule rate with a source link and date, and you can override the percentage at any time using the slider or number input. Use the restore button whenever you want to reset to the schedule rate.
Educational estimate only. Not medical, tax, legal or financial advice.