Seller per-order profit tool
Unit Economics Calculator
Calculate your per-order revenue, contribution profit, maximum CAC and profit after acquisition cost.
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Your inputs
Per-order estimate: Fixed overhead, taxes, returns, refunds and discounts are not automatically included.
Your results
Unit Economics Breakdown
Maximum CAC is a break-even acquisition threshold, not necessarily a recommended target. Results are estimates and do not include fixed overhead.
How to use
- 1
Enter your revenue
Add your selling price and any shipping charged to the customer.
- 2
Enter your variable costs
Add product, platform, shipping, fulfillment and other per-order costs.
- 3
Review your unit economics
See your contribution profit, margin, maximum CAC and profit after acquisition cost.
What this tool does
Unit economics are calculated per order. This estimate does not automatically include fixed overhead such as salaries, rent, software subscriptions or taxes. Maximum CAC is a break-even acquisition threshold rather than a recommended target, and real profitability can change with returns, refunds, discounts, taxes and recurring overhead.
- ✓Contribution ProfitRevenue remaining after non-CAC variable costs.
- ✓Contribution MarginContribution profit as a percentage of revenue.
- ✓Maximum CACThe highest customer acquisition cost per order before profit reaches zero.
- ✓Profit After CACEstimated profit after subtracting the entered customer acquisition cost.
- ✓Gross ProfitRevenue minus product cost only.
- ✓Variable CostsAll per-order costs entered before customer acquisition cost.
Formula & assumptions
Revenue per Order = Selling Price + Shipping Charged; Contribution Profit = Revenue − variable costs before CAC; Profit After CAC = Contribution Profit − Customer Acquisition Cost.
- Platform/payment fees, shipping, fulfillment, packaging and other variable costs are seller-entered per-order estimates.
- Returns, refunds, fixed overhead, taxes and currency conversion are not automatically included. Maximum CAC is a break-even threshold, not a recommended acquisition target.
Frequently asked questions
What are unit economics?
Unit economics describe the revenue, variable costs and profit associated with one order or one unit sold.
How do I calculate unit economics for ecommerce?
Start with order revenue, subtract product and every variable per-order cost, then compare the contribution remaining with customer acquisition cost.
What is contribution profit?
It is revenue left after product, platform, shipping, fulfillment and other non-CAC variable costs are deducted.
What is contribution margin?
Contribution margin is contribution profit divided by revenue, expressed as a percentage.
What is maximum CAC?
Maximum CAC is the contribution profit available before acquisition cost. At that CAC, the order-level profit is approximately zero.
What is the difference between gross profit and contribution profit?
Gross profit here subtracts product cost only. Contribution profit also subtracts the other variable costs of serving the order before CAC.
Should CAC be lower than contribution profit?
Generally yes if you want the order itself to remain profitable. Your appropriate target can also depend on overhead, retention and growth goals.
What costs should I include?
Include product, marketplace or payment fees, seller shipping, fulfillment, packaging and any other variable cost that changes with each order.
Do fixed business expenses count in unit economics?
They matter to overall business profitability, but this calculator does not automatically allocate fixed overhead such as salaries, rent, subscriptions or taxes.
Can I use this for Amazon, Etsy, eBay and Shopify?
Yes. The formula is platform-independent when you add the relevant platform and payment fees to the per-order costs.