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Free product economics model

Product-margin and ROI calculator

Model what remains after discounts, landed cost, waste, payment fees, and variable commission—then compare products on more than retail price.

Monthly product economics

$2,063Contribution profit
$4,560Net sales
$1,903COGS including waste
58.3%Gross margin
45.3%Contribution margin
108.4%Return on product cost

This operating model excludes fixed overhead, taxes, inventory carrying cost, refunds, and accounting adjustments. Confirm financial treatment with your accountant.

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Read the result correctly

Gross margin measures what remains after cost of goods. Contribution margin goes further by subtracting entered payment fees and variable commission. Return on product cost compares contribution profit with the product cost consumed.

This is an operating model, not accounting or tax advice. Reconcile results against actual transactions, inventory counts, refunds, and financial statements.

Read the product ROI guide ↗