NetPerSale uses the values you enter to estimate profit per sale. The formulas below match the current calculator engine.
The calculator first determines the effective sale revenue. A seller-funded discount is deducted from the item price, never below zero, and any shipping charged to the buyer is then added.
Marketplace fees are calculated on the discounted item price. Payment fees are calculated on total revenue.
When monthly orders are greater than zero, monthly fixed costs are divided across those orders. Expected return loss is the expected return rate multiplied by the loss entered for one returned order.
Margin is the estimated profit divided by revenue. If revenue is zero, the displayed margin is treated as zero.
The minimum sale price at which estimated profit reaches zero under the current inputs.
The minimum sale price estimated to produce the target margin you entered while keeping the other inputs unchanged.
The highest per-order advertising cost estimated to keep the selected target margin under the current revenue and non-ad costs. The calculator does not show a negative allowance; if there is no room for ad spend, it returns zero.
When monthly orders are greater than zero, estimated profit per order is multiplied by the entered order count. Because monthly fixed costs are already allocated across those orders, the monthly fixed-cost amount is effectively deducted once across the monthly total.
NetPerSale provides estimates based on the values entered. It does not represent an official marketplace settlement statement.