Amazon Profit Leak Calculator — Find Where Your Margin Goes
Getting sales but not profit? Enter your numbers and this free tool shows your real profit per unit, net margin, break-even ACoS — and pinpoints your single biggest profit leak. India, USA, UK & EU.
BSBy BSP Singh — 7+ years in Amazon selling, PPC & logistics. About the author →
Costs Per Unit
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Ads & Goal
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Enter your real numbers. The tool finds your profit per unit, margin, break-even ACoS, and the single cost leaking the most margin. Leave ad fields blank to skip PPC.
Real profit / unit
—
after everything
Net margin
—
final %
Break-even ACoS
—
ads = zero profit
Actual ACoS
—
from ad numbers
ROAS
—
return per ₹1 ad
Enter your numbers
—
Profit Score
Your biggest profit leak will show here.
This tool gives estimates from the numbers you enter. Real results vary with exact fee tiers, returns, the organic halo of ads, and currency rates. It's a planning guide, not a guarantee. Check your exact fees in Seller Central.
The Basics
What Is an Amazon "Profit Leak"?
A profit leak is any cost that quietly drains your margin while your sales look healthy. You can sell ₹50,000 of product and keep almost none of it — because product cost, Amazon fees, shipping, packaging, returns and PPC each take a slice. Most struggling sellers don't have a sales problem; they have one cost leaking most of their margin and don't know which one.
This calculator adds up every cost, shows your real profit per unit and net margin, and then names the single biggest leak — so you fix the right thing instead of guessing.
How to Read It
The 6 Things That Leak Amazon Profit
Here's what the tool checks, and the rough "healthy ceiling" for each as a share of your selling price. Go over a ceiling and that cost becomes a candidate for your biggest leak. (These are general defaults — your category may differ.)
Cost
Healthy ceiling
If it's leaking, do this
Product cost (COGS)
~35% of price
Negotiate with supplier or raise price
Amazon fees
~25% of price
Check category & size tier; some lower the fee
Fulfilment / shipping
~18% of price
Compare FBA vs Easy Ship; cut weight/size
Returns
~8% of price
Improve listing accuracy, sizing & quality
Packaging
~6% of price
Simplify packaging for this price point
PPC / ads
Below break-even ACoS
Lower bids, add negatives, fix conversion
The biggest leak is whichever cost is furthest over its ceiling. PPC is flagged the moment your actual ACoS rises above your break-even ACoS — because then every ad sale loses money.
Plug the Leaks With Helium 10
Helium 10 tracks your real profit, fees and PPC in one dashboard, and its tools help fix the leaks the calculator finds — product research, listing SEO, and ad management. Our pick for serious Indian sellers; start free.
🎟 35% OFF for 6 months on Helium 10 — applied automatically through this link (limited-time offer)
* Affiliate link — we may earn a commission at no extra cost to you. It never changes our advice. No tool guarantees results; your product, costs and margins still decide the outcome.
Affiliate disclosure: Some links here are affiliate links. If you subscribe through them, AIToolsDose may earn a commission — paid by the company, not you. It never changes our recommendations. Full Affiliate Disclosure & Methodology.
A profit leak is any cost that quietly eats your margin — product cost, Amazon referral and closing fees, fulfilment/shipping, packaging, returns, or PPC ad spend. Sellers often look healthy on revenue but lose most of it to one or two of these. This calculator shows your real profit per unit and pinpoints which cost is your biggest leak.
How do I calculate real Amazon profit per unit? +
Real profit per unit = Selling Price − Product Cost − Amazon referral fee − closing/fixed fee − fulfilment/shipping fee − packaging − a returns allowance − ad cost per unit. Net margin is that profit divided by the selling price. The calculator above does all of this instantly for India, USA, UK or EU.
Why am I getting Amazon sales but no profit? +
Usually one cost is leaking most of your margin. Common culprits: PPC ad spend above your break-even ACoS, Amazon fees larger than expected for your category, high fulfilment cost for a heavy or bulky item, or returns. Run the calculator to see your biggest leak and the fix.
Does this work for Amazon India and export sellers? +
Yes. Pick your marketplace — India (₹), USA ($), UK (£) or EU (€) — and enter your own fees. It works for FBA, Easy Ship and Self Ship, and for India-based sellers selling on Amazon.in or exporting to Amazon USA, UK and EU.