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Profit, Margin & ROI Tool

Reseller Profit Calculator

This free reseller profit calculator works for any marketplace. Enter your sale price, the platform’s fee percentage, your shipping and your item cost, and it instantly shows your total fees, payout, net profit, margin and ROI — the five numbers that decide whether a flip is worth your time.

Fees checked October 2026 · US fee schedules

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You keep (payout)
$42.80
    Net profit$27.80
    Margin55.6%
    ROI278%

    Selling on a specific platform? Use its dedicated calculator from the calculators hub — the exact 2026 fee rules are already built in. Marketplace rates change over time; check the Fee Change Tracker for the latest updates.

    Free forever No sign-up 2026 fee rates Fees checked October 2026

    Worked Example: A $50 Sale at 13.6% Fees

    Here is the default example above, broken down line by line — a $50 sale with eBay-style fees (13.6% plus a $0.40 per-order fee), a $10 item cost and $5 actual shipping:

    LineAmount
    Sale price$50.00
    Percentage fee (13.6% of $50.00)−$6.80
    Fixed per-order fee−$0.40
    Total fees (14.4% effective)$7.20
    Payout (you keep)$42.80
    Item cost−$10.00
    Actual shipping cost−$5.00
    Net profit · Margin 55.6% · ROI 278%$27.80

    How Reseller Profit Is Calculated

    The formula is simple once every cost is on the table: Net profit = (sale price − discount + shipping charged) − percentage fees − fixed fees − item cost − actual shipping cost. Your payout is what the platform sends you: sale plus shipping charged, minus all fees. Margin divides profit by the sale price, so it tells you what share of every sale dollar you keep. ROI divides profit by your item cost, so it tells you how hard your sourcing money worked. A $10 item that returns $27.80 of profit has a 278% ROI — you nearly quadrupled your buy-in before shipping.

    Two traps to avoid: first, most platforms charge percentage fees on the total (item + shipping charged, sometimes + tax), not just the item price — this calculator applies the percentage to the item plus shipping charged for exactly that reason. Second, “free shipping” is never free: if you charge $0 shipping, your actual shipping cost still comes out of the same sale, which is why it is a separate input here.

    Tips to Raise Your Profit, Margin and ROI

    • Price from the fee backwards. Decide the profit you want first, then set the price — our reverse price calculator solves that exact price for each platform.
    • Watch fixed fees on cheap items. A $0.40 per-order fee is 0.8% of a $50 sale but 8% of a $5 sale. Bundle small items or set minimum prices on fee-heavy platforms.
    • Lower your item cost, not just your price. ROI is driven by buy price. Paying $8 instead of $10 for the example item lifts ROI from 278% to about 347%.
    • Know your break-even before you buy. If an item cannot clear its fees, shipping and cost at a realistic price, leave it on the shelf — our break-even calculator gives you that floor price.

    Frequently Asked Questions

    What is a good profit margin for reselling?

    Most full-time resellers target a 40–60% margin after all fees and shipping. Beginners often accept 25–30% while learning a niche. Below ~20%, one return or a shipping surprise can erase the profit entirely, so treat thin margins as a warning sign, not a strategy.

    How do I calculate reseller profit?

    Add up everything the sale brings in (price + shipping charged), subtract everything it costs (platform percentage fees, fixed fees, item cost, actual shipping), and the remainder is your net profit. This calculator does exactly that, instantly, and also converts the result into margin and ROI.

    What is the difference between margin and ROI?

    Margin measures profit against the sale price (profit ÷ price). ROI measures profit against what you paid for the item (profit ÷ item cost). The same sale can show a 55.6% margin and a 278% ROI — both are true; they just answer different questions.

    Does this calculator work for any marketplace?

    Yes. It is platform-agnostic: enter the fee percentage and fixed fees of wherever you sell — eBay, Etsy, Mercari, a local consignment store, even an in-person market booth with a card-processing fee. For exact rules, use the platform-specific calculators in the hub.

    Why is my profit negative?

    Because the sale does not cover its costs: fees, item cost and shipping add up to more than the buyer paid. Raise the price, cut the item cost, charge for shipping, or move the item to a lower-fee platform — the all-platform comparator shows which one keeps you the most.

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