The referral fee is 15% in most categories and is charged on the total sales price - item price plus shipping and gift wrap, not the item price alone. At the shipped defaults this puts a $24.99 unit at $6.22 net after fees, ads and refunds, a 92.1% ROI and a $16.51 floor price.
Landed cost per unit (cost + freight + prep)
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USD
Marketplace fees per unit (referral + fulfilment + storage)
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USD
Payout per unit after marketplace fees, before your costs
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USD
Ad spend per unit sold
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USD
Refund cost per unit sold (revenue given back, net of any referral credit)
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USD
Net profit per unit
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USD
Net margin
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%
ROI on cash (profit / landed cost)
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%
Break-even sale price (0 = unreachable at these percentages)
—
USD
Break-even ad spend (ACOS ceiling)
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%
Landed cost to net profit, line by line Ten outputs from your ten numbers: landed cost, marketplace fees, payout, ad spend, refund cost, net profit, margin and ROI on cash. The parts add back up to the profit figure, so you can audit it against your settlement report.
Break-even price solver Solves the lowest price that still returns zero, instead of cost / (1 - margin). The referral fee and the ad spend shrink as the price falls, so the hand method sets the floor too high and rejects products that would have worked.
Break-even ad spend (ACOS ceiling) The highest share of sales you can pay for ads before this unit stops making money - the number to compare your actual ACOS against, computed after marketplace fees, landed cost and refunds, not before them.
No fee is hard-coded Every marketplace fee is a field you paste from your own fee preview and storage-fee report. Those are re-priced at least yearly, so nothing here goes stale; when they change you change one field, and any updated file stays free from the same listing.
Assumptions stated, not asserted The refund model is written down: the fulfilment fee is treated as spent, the returned unit as unsellable, and you tick whether the referral fee comes back. An independent tool - no logos, no affiliation, and no access to your seller account.
Offline install, no account Not a store install: open chrome://extensions, switch on Developer mode, click Load unpacked and pick the folder. Edge and Brave work the same way, and menu wording varies by version and interface language. Works offline, no login. Questions to the email on the listing.
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Free for the file open in your editor - no key, no limit. The workspace sweep and the report ask for a key.
We watch the regulation and vendor sources behind FBA Profit & Break-Even Calculator for Amazon Private-Label Sourcing — Chrome Extension + Web Tool every day. When a rule changes, you get a single email with what changed and the updated check. No newsletter.
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The installed toolbar version, which does the thing the page cannot: it remembers. Name each quote (Supplier A 500 pcs, Supplier B 1000 pcs), store it in the browser and open two side by side while the supplier chat is still on screen; it opens over whatever tab you are sourcing in, and it runs with
One payment, one licence key for this tool. The key is shown right after payment.
Amazon Seller Central's published US fee schedule: Professional selling plan $39.99/month, referral fee 15% in most categories, $0.30 per-item minimum referral fee. The FBA research suites that bundle a calculator like this are bi