Calculate Shopify store profitability with subscription costs, transaction fees, shipping, COGS, and marketing spend per order.
A Shopify store can look profitable on revenue and still lose money per order. This tool takes the numbers behind a single order - selling price, product cost, shipping, packaging, marketing spend, and the transaction fee you actually pay - and works down to profit per order, then scales that against the monthly subscription to show store-level profit. The figure users most often get wrong is the transaction fee: it is a percentage of the sale plus a fixed cents-per-transaction charge, and on low-priced items it can erase a large share of the margin. Enter the marketing spend you really commit per order, not the number you hope for.
A concrete input and expected output from the current implementation.
Input
Selling price $100; COGS $40; shipping $8; packaging $2; marketing $15; transaction fee 2.9% + $0.30; subscription $39/month; 100 orders/month
Expected output
Transaction fee: $3.20 per order ($2.90 + $0.30). Profit per order: $31.80 before the subscription, $31.41 after it. Monthly profit: $3,141. Per-order breakdown: COGS $40.00, shipping $8.00, packaging $2.00, marketing $15.00, fee $3.20, subscription share $0.39.
The fee is charged on the full sale price, so it comes out before the subscription; the $39 plan is then spread across 100 orders at $0.39 each, which is why net profit per order is $0.39 lower. The monthly total is 100 orders times $31.41, or equivalently $3,180 minus the $39 plan.
Enter the selling price, product cost (COGS), shipping cost, any packaging or other per-order costs, and the marketing spend you attribute to each order. The tool subtracts those from the selling price, then computes the transaction fee from the percentage rate and the fixed cents-per-transaction amount you supply, showing the fee as its own line. The result is profit per order and that profit as a percentage of the sale price.
The monthly plan cost and expected order volume turn per-order profit into a store-level figure. The tool divides the subscription by the monthly order count to get the plan's cost per sale, subtracts it, and reports net profit per order plus monthly profit. Because the subscription is fixed, its per-sale share falls as volume rises: the $39 plan costs $0.78 per sale at 50 orders a month, but only $0.078 at 500.
Both views are useful but answer different questions: per-order profit before the subscription shows whether one order carries its variable costs; after the subscription it shows whether the store covers its fixed plan cost at the volume you entered. The second figure is only as good as that volume assumption. At 100 orders a month a $39 plan costs $0.39 per sale; at 25 orders it costs $1.56.
The inputs cover subscription, transaction fees, shipping, COGS, and marketing, so the result is profit before taxes on that profit. Sales tax and VAT collected from customers are pass-through, not a cost; do not enter them as revenue. Taxes on profit, customs duties, and app subscriptions beyond the plan are outside the model; subtract them from the result if they apply.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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