What this eBay profit calculator includes
The buyer’s item payment and shipping charge become seller revenue. From that amount, the calculator subtracts an estimated final value fee, eBay’s per-order charge, any promoted listing fee, postage, packaging supplies, inventory cost, and other order-level expenses.
Sales tax is included separately because eBay states that the total sale amount used for its final value fee can include sales tax even though the seller does not retain that tax as revenue.
Current trading-card fee assumptions
For sellers without an eBay Store, eBay’s United States fee table lists select Trading Cards categories at 13.25% of the total sale amount up to $7,500 and 2.35% on the portion above $7,500. A per-order fee of $0.30 applies when the total order is $10 or less, and $0.40 applies above $10.
Fee schedules change, and Store subscriptions or account-specific conditions may use different rates. That is why both percentage tiers are editable. Review the current official eBay selling fee table before relying on an estimate.
How to calculate eBay profit
Estimated net profit = item price + shipping charged − eBay fees − advertising − postage − supplies − card cost − other order costs.
This eBay profit calculator uses that formula for each card sale. Profit margin divides the estimated profit by seller revenue. Cash ROI compares estimated profit with the money tied up in the card and fulfillment. The break-even item price estimates the lowest item price that covers the entered costs while leaving all other assumptions unchanged.
Why card cost matters
A card bought inside a collection still has a cost. Assigning a reasonable cost during inventory intake makes later pricing and profit reporting much more useful. Leaving card cost at zero can make a weak sale look profitable even though the inventory required real cash.