Before you order the stock,
know if the numbers actually work
Check your real Amazon profit, fees, margin, PPC limits and product risks before you pay your supplier.
Free check · No card required · Takes under 60 seconds
What you’ll know before you pay your supplier
Not a margin calculator. The figures that decide whether this product survives Amazon’s fees, your advertising and its own paperwork.
Real profit per unit
After the referral fee and the FBA fulfilment fee come off — not before them.
True margin and ROI
What each unit returns on the cash you tie up in stock for months.
Fees for your exact size tier
Matched to your packed box and weight, dimensional weight included.
Break-even sale price
The price below which every single sale costs you money.
Maximum ad spend per unit
What you can pay for a sale before the product stops paying for itself.
Compliance and product risks
The rules that apply to this exact product, each with its source link.
A clear score and verdict
0 to 100, with the reason on the first line — including when to walk away.
Practical next steps
Five things to settle with the supplier before any money moves.
Check your product
Enter the numbers you already have. You get a score out of 100, your full unit economics and the headline risks. We email the result so you can come back to it.
The product
What you plan to sell, and for how much.
Landed cost = one unit delivered to Amazon: goods, freight, duty, inspection.
Packed size and weight
Measure the retail box, not the product. This sets your FBA fee.
Category and product type
Category sets the referral fee. The tick boxes decide which compliance rules run.
Where should we send it?
Your score appears on screen straight away. We email the link so you can come back to it.
See what’s inside the Full Decision Report
More than a score — see the economics, risks, downside scenarios and exactly what to check before you place the order.
Verdict
Bamboo utensil set, 6 pieces
Worth testing45% margin and 187% ROI leave room for advertising and returns. Two items to confirm with the supplier first.
Unit economics
Net margin
45.0%
ROI
188%
Break-even
Break-even price
£9.40
Max landed cost
£13.80
Max ad spend / unit
£9.00
Break-even ACOS
45.0%
A new listing needs 10–20% of revenue in ads. At £19.99 that is ~£3.00 against a £9.00 ceiling — it fits.
What if it goes wrong
Demand and competition
Best Sellers Rank
8,600
Est. units / day
≈ 3.7
Competitor reviews
520
Sellers on listing
9
If you captured that volume
£971gross / month
Compliance and risk
Food-contact materials need migration testing
Amazon fees take an unusually large share
China sourcing: duty and lead time realities
Each rule links to its official source
What to do before you order
- 1Get food-contact migration reports before the deposit.
- 2Requote packaging at 33 cm to drop a fee tier.
- 3Confirm £4.80 includes duty and sea freight.
- 4Read the 1–2 star reviews on the top three listings.
- 5Order 300 units maximum as a first test.
The product and the market
What this product is competitively
A commodity set where packaging and bundle size decide the winner.
What you are walking into
520 reviews, nine sellers: a moderate barrier, not a closed door.
How you could differentiate
Better finish, a gift-ready box, or a size incumbents ignore.
How this score was built
Method and limits
Fee table
v1
Figures
Calculated
An informational estimate from the figures you supply and published Amazon fee schedules. Not legal, tax or financial advice.
Example figures for illustration only — not a real customer’s product. Your report is built from the numbers you enter.
Why a margin calculator isn’t enough
Four things turn a product that looked profitable in a spreadsheet into stock you cannot sell at a profit.
The fee, not the price
A box 2 mm too tall jumps a size tier. That single centimetre can cost more per unit than your whole margin, and it is decided by the packaging your supplier quotes.
Advertising eats the margin
A new listing usually spends 10–20% of revenue on ads to get its first reviews. A margin that looks fine at 18% often does not survive that.
Paperwork is decided before you order
Batteries, cosmetics, anything for children or touching food need documents your supplier may not have. You find out at the border, not at the listing.
The downside, not the best case
Price drops, fee rises, freight increases and returns each get modelled separately, so you can see which one turns this product into a loss.
How it works
Three steps. No account, no subscription, no software to install.
Enter what you know
Price, landed cost, packed box size, weight and category. Optionally the BSR and review count from the listing you are competing with.
Get the free score
Referral fee, FBA fulfilment fee for your exact size tier, profit per unit, margin, ROI and a score out of 100 — on screen in seconds.
Unlock the decision report
If the product is worth a closer look, the full decision report adds break-even, your ad-spend ceiling, five downside scenarios, every compliance rule and a five-step action list.
Free check, or the full decision report
One payment per product. No subscription, no credits to buy up front.
Free product check
Free
Your email address, no card.
- Score out of 100 with a plain-English verdict
- Referral fee and FBA fulfilment fee for your exact size tier
- Profit per unit, net margin and ROI
- The two risks that matter most
- Emailed to you so you can come back to it
Full decision report
£9.99on Amazon.co.uk
$9.99on Amazon.com
€9.99on supported EU marketplaces
One-time payment · No subscription
- Profit, margin and ROI broken down line by line
- Break-even sale price and break-even landed cost
- Maximum ad spend per unit before the product stops paying
- Five downside scenarios: price war, fee rise, cost rise, returns, ads
- Every compliance rule that applies, with its source link
- Demand and competition read, if you supply the listing figures
- A five-step action list before you pay a supplier
- Private link you can revisit, print or save as PDF
You only pay once you have seen your free score.
The numbers are calculated, not generated
Every figure comes from a deterministic calculation against a versioned fee table. A language model writes the commentary around those numbers and is never allowed to produce one.
Fee tables are versioned
Amazon changes its fees. Each report records which fee table produced it, so a report you ran in March still shows March’s working in September.
Compliance rules cite their source
Every rule that fires links to the regulator or the Seller Central page it comes from. You can check the working rather than take our word for it.
We tell you when to walk away
A tool that approves every product is worthless. If the maths does not work, the report says so on the first line.
Questions people actually ask
What does the full report cost?
£9.99 on Amazon.co.uk, $9.99 on Amazon.com and €9.99 on supported EU marketplaces. It is a one-time payment for that product — there is no subscription, and nothing is charged until you have seen your free score and decided the product is worth a closer look.
Where do the FBA fees come from?
From published Amazon fee schedules, stored as versioned tables in our database rather than hard-coded. We match your packed dimensions and weight to the correct size tier the same way Amazon does, including dimensional weight. They are estimates: your own account may have promotional rates, and Amazon changes its schedule, so always confirm the final figure in Seller Central before you commit.
Do I need an Amazon account or an API key?
No. You type in the numbers you already have — price, cost, box size, weight, category. If you want the demand section, you copy four numbers off the Amazon listing itself. Nothing connects to your seller account.
Why is the free check free?
Because it costs us almost nothing to run — it is pure arithmetic on our server, with no AI involved. We show you the score for free and charge only for the full working. If the free check tells you the product is a loser, that is a useful answer and you owe us nothing.
Is the report written by AI?
The numbers are not. Every fee, margin, break-even figure and compliance rule is calculated deterministically from your inputs and our rule tables. A language model writes the commentary and the action list around those numbers, and it is explicitly forbidden from inventing or changing a figure.
What if the product is a bad idea?
Then the report says so, on the first line, with the reason. That is the whole point. A report that tells everyone to proceed would cost you far more than it saved.
Do you keep my product idea?
Your inputs are stored so you can return to your report through its private link. We do not publish them, sell them, or use them to source products ourselves. See the privacy page for detail.
Can I get a refund?
If the report fails to generate, or something in it is factually wrong about the fee schedule, email us and we refund it. See the refunds page for the full policy.
Your supplier gets paid either way
Check the numbers first. It is free, it takes under a minute, and it is the cheapest part of the whole decision.
Check My Product FreeFree check · No card required · Takes under 60 seconds
Still not sure?
Ask us before you spend anything. We answer within one working day.