Work out what remains after an order’s costs, before you commit to a product or promotion.
All figures are in USD. Defaults are illustrative, not current vendor fees. Inputs stay in this page and are not submitted to us.
What this calculator measures
Contribution is customer revenue minus the variable costs entered. It is not final net profit. The model treats a single item as one order, with the percentage payment fee applied to product price plus shipping collected. It does not model sales tax, discounts, multi-item shipments, or a processor’s different fee basis.
Contribution = product price + shipping collected − product cost − fulfillment paid − percentage payment fee − fixed payment fee − other variable cost − acquisition cost.
Break-even order count is monthly fixed costs divided by contribution, rounded up. If contribution is zero or negative, more orders do not cover fixed costs under those assumptions.
Replace the example inputs
Use a real supplier quote, your payment provider’s current terms, and actual shipping destinations. Put packaging, royalties, or an expected returns allowance into “other cost.” Include platform and app subscriptions in monthly fixed costs. Add sample and design costs to the period you want to evaluate.
For example, with the defaults, customer revenue is $32, variable costs total $21.26, and contribution is $10.74. Five orders would cover $50 of monthly fixed costs in this simplified model. That is arithmetic, not a forecast of sales.
Try a downside scenario
Increase shipping cost, add a replacement allowance, or reduce price to test the effect of a discount. If the model only works when every assumption is favorable, reconsider the product before promoting it.
Next: compare fulfillment models or prepare your first store.