ScoutMargin

Fix the math, fix the deal. ScoutMargin is a free FBM profit calculator built by Amazon sellers, for Amazon sellers. This extension puts it one click away on any Amazon page: • Analyze in calculator — ASIN, title, buy-box price, and category auto-detected from the product page • True buy-cost stacking — store discounts, coupons, promos, tax, gift-card discounts, and cashback applied in the right order • Buy/pass verdicts against your own ROI and profit targets • Save to buy list — build your deal pipeline without leaving Amazon • Track this seller — follow any storefront from product or seller pages (5 tracked storefronts free) • Floating on-page button — Analyze or Track without opening the popup; dismissible per page, toggleable in Settings • Category-aware Amazon referral fees, checked Sep 2026 — with manual override Free: the calculator, buy list, ungating tracker, and up to 5 tracked storefronts — free, and staying that way. No account needed to run your numbers. Privacy: the extension reads product details on Amazon pages only to prefill your calculator. Your data is never sold. Anonymous usage stats help improve the product — see scoutmargin.com/privacy.