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See your real profit on any eBay listing — net price after fees, plus an inline profit calculator with source cost and shipping. eBay Profit Calculator Stop guessing. See your real take-home on every eBay listing — instantly, without leaving the page. When you open any eBay product listing, eBay Profit Calculator automatically overlays the net price after selling fees directly next to the listing price. No more mental arithmetic. No switching tabs to a separate calculator. The number you actually pocket is right there. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT IT DOES ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ Net price badge — shows your take-home amount and the fee deducted, inline with the listing price on every product page. ▸ Inline profit calculator — a small calculator appears below the price with three inputs: Sale Price, eBay Fee %, and Source + Shipping cost. Adjust any value and your profit updates instantly. Green means profit. Red means loss. ▸ Per-category fee rates — eBay charges different fees depending on the category. Set your exact rate for each category (e.g. Electronics 12.9%, Clothing 13.25%) and the extension automatically applies the right rate based on the listing's breadcrumb category. ▸ Auto-detect category — click "Add from current page" in the settings to pull the category directly from whatever eBay listing you have open. No typing required. ▸ Fallback rate — if a listing's category doesn't match any of your rules, the extension falls back to a configurable default rate (preset to 13.5%). ▸ Multi-currency — works with £ (ebay.co.uk), $ (ebay.com), and AU$ (ebay.com.au). The currency symbol is detected automatically from the listing price. ▸ Handles eBay's dynamic pages — the badge and calculator stay accurate even when you change item quantity, switch variants, or navigate between listings without a full page reload. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHO IT'S FOR ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✔ eBay resellers who source items and need to know the margin before buying. ✔ Casual sellers who want to know what they'll actually receive after fees. ✔ Anyone comparing listings who wants to see real numbers, not sticker prices. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ HOW TO USE IT ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1. Install the extension. 2. Open any eBay listing (ebay.com or ebay.co.uk). 3. The net price badge appears automatically next to the listing price. 4. Use the profit calculator below the price to enter your source cost and adjust the fee rate. 5. To set category-specific fee rates, click the extension icon and configure your categories in settings. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ SETTINGS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Click the extension icon to open settings. From there you can: • Add category fee rules manually — type the category name and your fee percentage. • Add from the current page — the extension reads the breadcrumb category from the eBay listing you have open and adds it to your list with one click. • Remove or edit any category rule at any time. • Your rules are saved to Chrome sync storage, so they follow you across devices. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ PERMISSIONS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ This extension requests only the minimum permissions needed: • Storage — to save your category fee rules across sessions. • Active Tab + Scripting — to read the category name from the eBay page you have open when you click "Add from current page" in settings. The extension does not collect, transmit, or share any data. Everything stays on your device. No accounts. No sign-up. No tracking. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ NOTES ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • Fee rates are set by you — the extension does not automatically fetch eBay's current fee schedule. eBay occasionally updates their rates, so check your settings if numbers look off. • The profit calculator is a tool to help you estimate — it does not account for PayPal fees, promoted listing fees, postage label costs, or other variables unless you factor them into the source + shipping field. • This extension is not affiliated with or endorsed by eBay Inc.