MarginTrue profit for UK Amazon sellers.
What you actually made after every Amazon fee, VAT and ad. Per product, per day, with the estimates labelled until Amazon settles them.
- Profit per product, per day
- VAT to pay HMRC, running
- Settled and estimated, labelled
- Returns costed properly
- What needs a decision, in pounds
- Phone app: every sale rings
“So happy I found MarginLens. Switched over to this as it is much better suited for VAT registered sellers. I can see clearly how much VAT I need to pay for the current quarter, negating all VAT I’ve spent on Amazon ads and Amazon fees. This is one of those tools I would hate to be running our business without, highly recommend.”
“To be completely clear, this is far better than Sellerboard for us. It has all the tools we need, like the VAT quarter period accounting which Sellerboard doesn’t, and that helps with our cashflow so much as we can see exactly what needs paying and what doesn’t. I also really like the idea that revenue is vanity and profit is sanity, so the pure focus of the software is profit and nothing else really. It’s been brilliant for us and I would recommend it to anyone.”
“Brilliant tool for Amazon sellers. MarginLens has really helped me optimise my Amazon business. I can now see exactly where every hidden fee goes, and seeing the VAT on my ad spend has helped me a lot. I can see exactly how much profit I’m making per day and per month, which I never had a clear picture of before. I’d definitely recommend MarginLens to anyone who wants to make sure their Amazon business is actually profitable. Eamon has amazing knowledge too, and I’d highly recommend getting his help.”
Everything you need to know what you made.
Seller Central shows revenue. The fees arrive a week later. VAT sits on top of everything and ads live in another console. MarginLens puts it on one page, every morning.
Profit per product, per day
After every Amazon fee, VAT, ads and the cost of your stock. Which products pay you, and which only look busy.
VAT the way your accountant does it
VAT on sales set aside, VAT on Amazon's fees taken off your bill, and a running "VAT to pay HMRC" for the quarter.
Settled or still a guess
Amazon posts fees up to two weeks after a sale. Estimates are labelled until they settle, so a good morning never turns into a bad afternoon.
Every fee is a column
Revenue, VAT, refunds, referral, FBA, storage, other fees, ads, cost of goods, profit. Per SKU, per period, and it adds up across the page.
What needs a decision, with the money at stake
A product on the wrong referral fee. Stock that runs out in three weeks. Returns costing more than they should. Ranked by pounds.
Returns costed honestly
A refund isn't the end of it. Amazon keeps fees, grades the return, and sometimes never sends the item back. You set what each grade costs.
Ads inside the profit figure
Amazon Ads connected, so profit is after advertising, not before. Which products the ads are eating, and by how much.
On your phone
Every sale rings with what it made. A summary after midnight. Stock and loss alerts. Same figures as the web dashboard.
The product, not a description of it.
One number a day, and how sure it is
Profit for today, this week, thirty days or any range, with fees counted before VAT. Under it, how much has settled with Amazon and how much is still an estimate.
- Settled figures come from Amazon's own financial events
- Pending orders are priced from real order data, fees estimated the way Amazon charges them
- Anything estimated is labelled as an estimate
Every fee is a column
The full ledger: revenue, VAT on sales, refunds, referral fee, FBA fee, storage, other fees, ad spend, cost of goods, profit. Per SKU, per period. Each row adds up, and you can check it with a calculator.
- Fees shown before VAT, or exactly as Amazon charges them, your choice
- Storage accrued day by day from Amazon's report, never guessed
- Returns, disposals and write-offs charged on your own rules
VAT, the way your accountant would do it
Once you're VAT registered, a sixth of every sale belongs to HMRC and a sixth of every Amazon fee comes off your VAT bill. Miss either and profit is wrong, in opposite directions.
- VAT on sales set aside, never counted as yours
- VAT on Amazon's fees comes off your VAT bill
- A running "VAT to pay HMRC" figure
What needs a decision, with the money at stake
A product on the wrong referral fee category. Stock that runs out in three weeks with nothing on the way. Returns costing more than they should. Each one with the pounds involved and a button to the exact place to act.
- Findings are ranked by £ impact, not by how loud they are
- Ads connected too, so profit is after advertising, not before
- Synced every five minutes in the background
How settling works
Amazon doesn't tell you the real fees on a sale until days later. Drag the slider to watch one £19.99 order move from estimate to fact.
Three days, same account, £1.10 apart. We can tell you why.
We reconciled three days of a real account, 21 to 23 September 2026, line by line against Sellerboard, the tool most UK sellers use. Both were set to count fees on the day Amazon bills them.
- ✓Units sold, refunds and ad spend: identical.
- ✓Referral fees, FBA fees, delivery charges and VAT: within 5p of each other.
- £1.1066p of sales on orders Amazon had not yet priced, and pennies of cost of goods and fees on orders that had not yet settled.
When two tools disagree it is nearly always a choice, not a mistake: whether the VAT on fees is a cost, when storage counts, what a return costs. MarginLens shows you each choice and lets you make it.
Connected in a minute. Profit by the morning.
Connect Amazon
Amazon's own authorisation flow, no passwords shared. Ads can be connected too, so profit is after advertising.
Answer three questions
When a storage bill counts. What a return costs you when Amazon marks it unsellable. Whether your stock has one cost or a cost per delivery. Each with what your answer means underneath.
Watch it fill in
The last month arrives in minutes and two years follows behind. From then on it syncs every five minutes, and a summary lands on your phone after midnight.
Switching from another tool? One tap sets MarginLens to count fees and returns the way Sellerboard does, so a day here lines up with the same day there. Then change one choice at a time and see what moves. A guided setup call with a founder is £20 once, free with a founding place.
Same figures, in your pocket.
The iPhone app runs the same numbers as the web dashboard, laid out for a glance. Every sale rings with what it made, a summary lands after midnight, and it tells you when stock is running low or a product starts losing money.
One price for the software. A second plan if you want a person.
Nothing on the dashboard is held back on either plan. Review adds a monthly call, not features.
- True profit per product, per day, after every fee, VAT and ad
- VAT done properly: fees ex VAT, what to set aside for HMRC, your registration date
- Returns costed honestly, storage accrued daily, batch stock costing
- The phone app: every sale rings, end-of-day summary, stock and loss alerts
- 14-day free trial, no card, cancel any time
- Optional guided setup call: £20 once, free with a founding place
- Half an hour a month, on your actual numbers
- Actions written into your dashboard after every call
- A guided setup call to get you started, included
- Everything in Software
MarginLens started as a private tool to answer one question honestly: did I actually make money on that sale? I sell on Amazon UK myself, and the answer was harder to get than it should be. Seller Central shows revenue. The fees arrive a week later. VAT sits on top of everything. Ads live in a different console.
So I built the thing I wanted: one profit figure I could defend, with every line behind it visible, and the estimates clearly marked as estimates. It runs on my own account every day, and everything it shows you is checked against what Amazon actually paid me.
Straight answers
Do you need my card to start?
No. Connect your Amazon account and the 14-day trial starts. When it ends it simply ends, unless you subscribe from inside the app.
What do you read from my Amazon account?
Orders, financial events and fees, FBA inventory and inbound shipments, listing prices, and Amazon's own reports for storage, returns and removals. If you connect Amazon Ads, your ad spend too. It is read-only: MarginLens never changes a listing, a price or an order.
Do you see my customers' details?
No. We request only the non-personal data roles, and the code that reads orders does not read buyer names, addresses or contact details. See the privacy policy.
How accurate is it?
Settled figures come straight from Amazon's own financial events. Pending orders are priced from real order data with fees estimated the way Amazon charges them, and they are labelled as estimates until they settle. When we find a difference against another tool, we work out why and show you.
I'm VAT registered. What changes?
Everything about the profit figure. VAT on your sales is set aside for HMRC rather than counted as yours, the VAT on Amazon's fees comes off your VAT bill so fees show at their true cost, and a running "VAT to pay HMRC" figure tells you where the quarter stands. You give us your registration date once; nothing before it takes VAT off a fee when you could not. If you'd rather see cash as Amazon charges it, one toggle switches the whole app to that view.
Is it only for the UK?
Yes, for now. It is built around Amazon.co.uk, UK VAT and sterling. Other marketplaces will come as their own views, not blended into one number.
How is this different from Sellerboard?
The figures are close: on the days we have checked line by line, within about a pound. The difference is in how you get there. MarginLens asks you how profit should be worked out and shows you every choice, a founder will set it up with you on a call, estimates are labelled as estimates until Amazon settles them, and every fee can be opened to see what is in it.
What is the guided setup call?
Half an hour on a video call with a founder, going through your settings and your own figures. It is £20 once with the Software plan (free with a founding place) and included with Review. It has to be taken within 30 days; if you have not booked one by then, we refund it in full. The details are in the terms.
Where is my data kept?
In London, on Google Cloud, isolated per account. Amazon tokens are deleted the moment you disconnect, and a closed account is purged after 90 days. Details in the privacy policy.
Know what you made. Every morning.
Connect Amazon, answer three questions, and the first month is on screen in minutes. Fourteen days free, no card.
MarginLens is an analytics service for Amazon sellers, built and operated in the UK. Sellers authorise it to read their own Seller Central data through Amazon's standard authorisation flow. It holds no buyer personal data, and every figure it shows is traced to a real Amazon transaction, with anything estimated labelled as such.