Online Seller Profit Calculator

Step 1. Start with one sale
Use the calculator to review one sale at a time. Save your workbook copy and replace the example figures. Use a consistent tax basis throughout.

Step 2. Enter what the buyer pays
Enter the item sale price and the postage charged to your buyer. These amounts make up the receipts used by the calculator.

Step 3. Include every selling cost
Add the item cost, postage you pay, packaging and other costs. Enter your marketplace and advertising percentages, plus any fixed fee. Use your own applicable rates. Both percentage fees in this model apply to the item price plus postage charged.

Step 4. Read the result
Review estimated profit, the break-even item price and the price needed for your target profit. The example returns twenty-four dollars and two cents. This is a planning result based on the costs entered.

Step 5. Compare before you sell
Change the item price or postage cost and check the difference. Set your target profit before accepting an offer. Keep the formulas intact and save your changes.